US3910617A - Solenoid operated electric strike - Google Patents

Abstract

An electric strike with a pivotally mounted catch which is locked by a pivotally mounted detent engageable with a pivotally mounted detent arm controlled by the catch, movement of the detent being controlled by an electrically energizable solenoid and moveable core assembly which has a portion of the core extending outwardly of the solenoid, the core being pivotally interconnected with the detent and said portion of the core moving inwardly of the solenoid upon energization of the latter. The detent arm may be omitted and the detent may, in such case, engage a pin carried by the catch.

Description

Oct. 7, 1975 United States Patent [1 1 Scalza et al.

[ SOLENOID OPERATED ELECTRIC STRIKE 3,655,240 4/1972 DuRocher et a1. 292/201 Inventors: Anthony J. Scalza, Bronx; William 375l088 8/1973 FOREIGN PATENTS OR APPLICATIONS Schlage et al.........

G. Brown, New York, bothiofN.Y.

94,972 11/1897 Germany.......................292/341.16

[73] Assignee: Square D Company, Park Ridge, 111.

June 20, 1973 Primary ExaminerRichard E. Moore [22] Filed:

Attorney, Agent, or Firm-Brooks l-Iaidt Haffner & Delahunty 21 Appl. No.: 371,576

Related US. Application Data [63] Continuation-in-part of Ser. No. 227,895, Feb 20,

1972, abandoned.

able with a pivotally mounted detent arm controlled by the catch, movement of the detent being controlled by an electrically energizable solenoid and moveable [52] US. Cl. [51] Int. [58] Field of Search...

70/277 448 core assembly which has a portion of the core extending outwardly of the solenoid, the core being pivotally interconnected with the detent and said portion of the core moving inwardly of the solenoid upon energiza- References Cited UNITED STATES PATENTS 292/201 X tion of the latter. The detent arm may be omitted and the detent may, in such case, engage a pin carried by the catch.

292/201X 16 Claims, 9 Drawing Figures XX 36 2.1 1 3 U mm "t. e i om d Ma v aw DZ 2,325,225 Burke 2,893,772 7/1959 Edwards 3,455,127 7/1969 Simon.......

U.S. Patent Oct. 7,1975 Sheet 1 of 4 US. Patent Oct. 7,1975 Sheet20f4 3,910,617

US. Patent 0a. 7,1975 Sheet 3 of4 3,910,617

U.S. Patent Oct. 7,:1975 Sheet 4 of4 3,910,617

SOLENOID OPERATED ELECTRIC STRIKE NOID OPERATED ELECTRIC STRIKE and filed Feb.

20, 1972, now abandoned.

This invention relates to electrically operable door strikes used either to unlock or lock a door, gate, or other barrier or to stop or release certain types of moveable devices, upon electrical energization thereof.

Electrically operable door strikes, also known in the art as electric strikes, electric releases or electric door openers, are well known and are used primarily to control the opening of a door providing access to a space where it is desired to restrict the persons entering such space. For example, it may be used in conjunction with an apartment house door, so that a person or persons can leave the building by withdrawing the door latch internally and without electrically energizing the strike, but so that persons may not open the door from the exterior without either a proper key or electrical energization of the strike by various means, e.g. by the operation of the push button by a person from internally of the building or by authorized personnel from externally of the building. Such a push button can be replaced by devices such as a card-key control device, an air control switch, etc. i

In some applications, such as in institutions, it is desirable to lock a door or doors by energization of the strike so that in the event of power failure and an emergency, such as a fire, the doors will be unlocked automatically. One embodiment of the invention is of the type which looks upon energization of the strike and is applicable to door interlock systems; fire control doors; institutional fail-safe doors; door control of emergency alarm systems and control of stop-motion devices.

The strike is located in the door frame where there is very little space. Therefore, it is very important that the strike and its operating mechanism occupy as little space as possible. Also, to be reliable, it is important that the electric coil be able to exert a substantial force on on the catch holding or releasing mechanism even though it is small, particularly if the door is being pushed while the coil is energized. It has been found that as a practical matter a solenoid and moveable core or plunger type of mechanism can, for a given size, provide a greater force than an electromagnet with an armature and yet be simple in construction.

However, when a solenoid is energized it normally pulls the core or plunger inwardly of the coil which, while simply connected to release a catch upon energization of the coil, creates complications when it is desired to lock the catch upon energization of the coil. For example, to lock the catch the detent lever or plate usually moves toward the catch and the catch detent arm, but if the portion of the solenoid. plunger which extends out of the core faces the catch, the plunger movement is away from the catch which either requires a reversing mechanism or a more complicated detent lever and detent arm and additional space.

Also, the plunger of the solenoid usually is confined to movement in a straight line whereas the detent is pivotally mounted which means that the point of connection thereon moves in an are so that the plunger cannot be connected directly thereto if binding of the plunger is to be avoided.

In accordance with the preferred embodiment of the invention, the detent for the catch of a strike moves toward the catch, butthe exposed portion of the solenoid plunger faces away from the catch and is pivotally joined to the detent so that energization of the coil of the solenoid causes the detent to move away from the coil. With such a construction, the mechanism used to control the catch may be as simple as that previously releasing a catch upon energization without causing complexity in the catch control mechanism.

In another embodiment of the invention the detent,

strike and solenoid and plunger construction are the same as in the first embodiment, but the exposed portion of the plunger faces toward the catch and the detent and is connected to the detent in the same manner as it is connected thereto in the first embodiment so as to avoid binding of the plunger.

One object of the invention is to provide a solenoid and core operated electric strike which is simple in construction, small in size, reliable in operation and which can be energized by alternating or direct current at any desired voltage.

Other objects and advantages of the invention will be apparent from the following detailed description of presently preferred embodiments thereof, which description should be considered in conjunction with the accompanying drawings in which:

FIGS. 1 and 2 are perspective views of the preferred embodiment of the invention respectively showing the catch in the locked position and in the released position;

FIG. 3 is a fragmentary, perspective view of a modified form of the embodiment shown in FIGS. 1 and 2, in which the catch is released upon energization of the solenoid;

FIGS. 4 and 5 are perspective views of a modified form of the embodiment shown in FIGS. 1 and 2 in whichthe solenoid is located in a different position with respect to the catch; and

FIGS. 6-9 are perspective views of modified forms of the embodiment shown in FIGS. 1 and 2 in which the catch is released upon energization of the solenoid.

With reference to FIG. 1, acatch 10 is pivotally mounted on a shaft 11 which is surrounded byspring 12, which urges the catch face outwardly of the strike housing which comprises a relatively long andnarrow base 13 withupstanding walls 14, 15, 16, 17 and 18. The housing may comprise additional walls and the mounting plate for the strike has been omitted for ease in illustration. The face of thecatch 10 engages alatch 19 which normally is carried by a door and which is moveable in the direction of thearrow 20 to disengage it from thecatch 10. When thelatch 19 is disengaged from thecatch 10, thelatch 19, and the portion of the door on which it is mounted, is moveable in the direction of the arrow 20a. The cooperation of thecatch 10 with thelatch 19 is well known in the art, and when thecatch 10 is locked, the door carrying thelatch 19 cannot be opened until the latch is moved in the direction of thearrow 20. However, when thecatch 10 is released, the door can be opened without withdrawing thelatch 19, because thecatch 10 is permitted to move around the, shaft 11 into the position thereof shown in FIG. 2.

The ends of the shaft 11 are supported by thewalls 15 and 16, and thewall 16 has acurved slot 21 therein through which apin 22, mounted on thecatch 10, extends. Outward movement of the catch is limited by en gagement by thepin 22 with the end wall of theslot 21, and inward movement of thecatch 10 is limited by engagement of thepin 22 with the opposite end wall of theslot 21.

Anarm 23 is pivotally mounted at 24 on thewall 16 and has anupstanding projection 25, which is engageable with a detent 26 when it is in the position shown in FIG. 1. Thedetent 26 is pivotally mounted at 27 on thewall 17, and is similarly pivotally mounted on the opposite end on thewall 18. Thus, thedetent 26 can move, at its end spaced from theaxis 27, toward and away from thecatch 10, and preferably movement of thedetent 26 toward thecatch 10 is limited by a fixedpin 28 extending upwardly from thebase 13.

Thebase 13 carries a solenoid andcore assembly 29 which comprises asolenoid 30 which can be continuously or discontinuously energized, aframe 31, and amoveable core 32 extending axially of thesolenoid 30. Ayoke 33 is mounted on the end of thecore 32, and awasher 34 is mounted between theyoke 33 and thecore 32. Thecore 32 is surrounded by aspring 35 which urges the core outwardly of the interior of thesolenoid 30.

Theyoke 33 is connected to a portion of thedetent 26 by a lever in the form of aU-shaped rod 36, which is pivotally connected to theyoke 33 at one end and is pivotally connected to thedetent 26 at the opposite end and at a portion of thedetent 26 spaced from its pivot axis, the intermediate portion of therod 36 extending alongside thesolenoid 30. Therod 36 may be retained in place by thewall 17 or in any other manner, such as by flattening one end thereof as shown in FIGS. 4 and 5.

In FIG. 1 the parts of the strike are shown in the positions which they assume when thesolenoid 30 is energized and in FIG. 2 they are shown in the positions they assume when the solenoid is de-energized. Thus, as shown in FIG. 1, with thesolenoid 30 energized, thedetent 26 is against thepin 28 and in a position in which it engages the projection on thearm 23 when an attempt is made to rotate thecatch 10 around the shaft 11, thepin 22 engaging thearm 23. Accordingly, thecatch 10 is prevented from rotating around the shaft 1 1 and is locked.

However, when the solenoid is de-energized, the spring moves thecore 32, therod 36 and thedetent 26 to the positions shown in FIG. 2, so that if pressure is applied to thecatch 10 to cause it to rotate around the shaft 11, the projection on thearm 23 is free to move past thedetent 26 so that thecatch 10 may be withdrawn to the position shown in FIG. 2. Accordingly, the embodiment shown in FIGS. 1 and 2 is one in which thecatch 10 is locked when thesolenoid 30 is energized and is released when thesolenoid 30 is not energized.

When it is desired to employ the parts shown in FIGS. 1 and 2 to cause thecatch 10 to be locked when the solenoid is de-energized and to be released when the solenoid is energized, thearm 23 may be modified as shown in FIGQ3. In FIG. 3, thearm 23 is replaced by anarm 37 which has an L-shapedprojection 38 extending therefrom. One portion 39 of theprojection 38 is engageable with thedetent 26 when thesolenoid 30 is deenergized, and the parts are in the position shown in FIG. 3. However, the spacing between he portion 39 and the main body of thearm 37 is sufficient to permit the end of thedetent 26 to pass therebetween when thedetent 26 is moved by the solenoid core to the position shown in FIG. 1 which permits thearm 37 to rotate about itsaxis 24, and therefore, permits thecatch 10 to rotate about its pivot axis to the position shown in FIG. 2. It will be noted from FIG. 3 that to provide the necessary clearance for theprojection 38, therod 36 is mounted on the opposite side of thesolenoid 30 from that shown in FIGS. 1 and 2 and the detent 26a is cut away at 26b, it being necessary for theprojection 38 to move substantially to the base 13 to permit adequate movement of thecatch 10.

The embodiments shown in the preceding figures are particularly suitable for installation where the depth of the door frame is relatively small. However, in some applications, the door frame depth is sufficient to permit reorientation of the solenoid andcore assembly 29 to the positions shown in FIGS. 4 and 5. In the embodiments shown in FIGS. 4 and 5 the shaft 11, and hence the pivot axis of thecatch 10, is disposed transversely to the length of thebase 40 of the strike housing, and thedetent arm 41 is pivotally mounted at 42 on thewall 42a. Preferably, the embodiment shown in FIGS. 4 and 5 is provided with asecond detent arm 43 similar to thearm 41 and similarly mounted on thewall 45. Outward movement of thecatch 10 may be limited in any well known manner, such as by anear 44 on theside wall 45 of the housing and engageable with thearm 43, each of thearms 41 and 43 having a slot 46 (FIG. 5) for receiving the pin '22.

The solenoid andmoveable core assembly 29 in FIGS. 4 and 5 is identical with the solenoid andcore assembly 29 shown in the preceding Figures, and thedetent 26 is mounted and operates similarly to thedetent 26 shown in the preceding Figures. Thecore 32 is connected to thedetent 26 by theU-shaped rod 36 and may be retained in theyoke 33 by a flat 49 at one end. Thearms 41 and 43 haveprojections 47 and 48 which are engageable with thedetent 26 when thesolenoid 30 is energized and which pass by thedetent 26 when thesolenoid 30 is de-energized. Thus, when the solenoid is energized, thedetent 26 is in the position shown in FIG. 4 and engages theprojections 47 and 48 preventing movement of thecatch 10 around the shaft 11 by reason of thearms 41 and 43 and thepins 22. However, when thesolenoid 30 is de-energized, thedetent 26 assumes the position shown in FIG. 5 so that thearms 41 and 43 are free to move with thecatch 10 permitting thecatch 10 to move to the released position shown in FIG. 5. Thecatch 10 is returned to the outwardly extending position shown in FIG. 4 by means of thespring 12.

As described hereinbefore, the embodiment of FIG. 3 is similar to the embodiment shown in FIGS. 1 and 2 in that the exposed portion of the core 32 faces away from the detent 26a. However, it differs therefrom in that thecatch 10 is locked when thesolenoid 30 is deenergized. A further embodiment in which thecatch 10 is locked when thesolenoid 30 is de-energized but in which the solenoid andcore assembly 29 is reversed, is illustrated in FIGS. 6 and 7. Except for the reversal of theassembly 29 and the replacement of therod 36 by ashorter rod 50, the structure shown in FIGS. 6 and 7 is the same as that shown in FIGS. 1 and 2.

In the embodiment shown in FIGS. 6 and 7, the solenoid andcore assembly 29 is mounted on the base 13 with the exposed portion of the core orplunger 32 facing thedetent 26, and theyoke 33 on the end of the core orplunger 32 is connected to thedetent 26 by means of aU-shaped rod 50, similar to theU-shaped rod 36 shown in FIGS. 1-3. The action of thedetent 26, thecatch 10, thearm 23 and thepin 22 is the same as that described in connection with FIGS. 1 and 2. Thus, with the solenoid andcore assembly 29 de-energized, thedetent 26 assumes the position shown in FIG. 6 and locks thecatch 10. When the solenoid andcore assembly 29 is energized, thedetent 26 is moved by thecore 32 and therod 50 to the position shown in FIG. 7, thereby permitting thearm 23, and hence thecatch 10, to rotate.

If desired, thedetent arm 23 may be omitted and the detent may directly engage thepin 22 on and controlled by thecatch 10. FIGS. 8 and 9 illustrate an embodiment similar to the embodiment shown in FIGS. 6 and 7, but differing therefrom primarily in that the detent arm 23has been omitted and thepin 22 on the catch is directly engaged by thedetent 51.

In FIGS. 8 and 9 the solenoid core assembly is mounted on a relatively long andnarrow base 53 havingupstanding walls 54, 55, 56, 57 and 58, such base and walls forming a housing for the various parts. The housing may comprise additional walls which have been omitted in the drawings for ease of illustration. A portion of the mountingplate 59 for the strike is shown in FIGS. 8 and 9.

The operation of the embodiment shown in FIGS. 8 and 9 is essentially the same as the operation of the embodiment shown in FIGS. 6 and 7. Thedetent 51 is normally urged into the position shown in FIG. 8 by reason of its connection to theyoke 33 through theU-shaped rod 50, and is limited in its movement away from the solenoid andcore assembly 29 by reason of its engagement with theupstanding wall 56. In the position shown in FIG. 8, the nose portion 60 of thedetent 51 is in the path of thepin 22 secured to thecatch 10 so that inward movement of thecatch 10 is prevented by the nose portion 60 of thedetent 51.

When the solenoid is energized, thecore 32 thereof moves inwardly of thesolenid 30, thereby moving thedetent 51 into the position shown in FIG. 9. In such position, the nose 60 is out of the path of thepin 22 thereby permitting thecatch 10 to be moved inwardly to the position shown in FIG. 9. Maximum inward movement of thecatch 10 is limited by reason of the engagement of thepin 22 with a portion of theupstanding'wall 56.

It will be apparent to those skilled in the art that various modifications may be made without departing from the principles of the invention. For example, although it is preferred because of simplicity to employ thebent rod 36 for interconnecting the solenoid core and the detent, nevertheless, another type of linkage may be interposed between the core and the detent.

What is claimed is:

1. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to pennit rotation of said catch, and electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid and an interconnecting member extending from said core to said detent and pivotally connected at one end thereof to said core and pivotally connected at the other end thereof to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

2. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and a U-shaped rod pivotally connected at one end to said portion of said core and at its opposite end to said detent for moving said detent from said second position to said first position upon movement of said core in said direction, said rod having its intermediate portion extending alongside said solenoid.

3. A strike as set forth in claim 2, wherein said means engageable with said detent comprises a pivotally mounted arm having its pivot axis parallel to the pivot axis of said catch and having an projection thereon upstanding therefrom in the direction of said pivot axis and engageable with said detent in said one position thereof, said catch having means thereon engageable with said arm for preventing rotation of said arm with respect to said catch in a predetermined direction but permitting rotation of said arm with respect to said catch in a direction opposite to said predetermined direction.

4. A strike as set forth in claim 3, wherein said projection on said arm is engageable with said detent in said first position of the latter. 7

5. A strike as set forth in claim 3, wherein said projection on said arm is engageable with said detent in said second position of the latter.

6. An electric strike as set forth in claim 2, wherein said means engageable with said detent comprises a projection on said catch spaced from the pivot axis of said catch and extending therefrom in the direction of said detent.

7. An electric strike comprising a relatively long and narrow base, a catch pivotally mounted from said base with its pivot axis extending in the direction of the length of said base, stop means on said base for limiting the movement of said catch in a first direction around the, pivot axis thereof, spring means acting between said base andsaid catch and urging said catch in said first direction, an electrically energizable solenoid with an axially moveable core mounted on said base with the axis thereof extending substantially parallel to the pivot axis of said catch, with the solenoid spaced from said catch in the direction of the length of said base and with a portion of said core extending from said solenoid on the side thereof opposite from said catch, said portion of said core moving in a direction toward the interior of said solenoid upon energization of the latter, a detent pivotally mounted from said base intermediate said solenoid and said catch and with the pivot axis thereof extending transversely to the pivot axis of said catch, a lever pivotally connected at one end to said portion of said core and extending to and being pivotally connected to a portion of saiddetent spaced from the pivot .axis thereof, said lever moving said detent from a first position nearer said solenoid to a second position nearer said catch upon energization of said solenoid, spring means urging said detent and said portion of said core away from said catch and urging said detent into said first position thereof, an arm pivotally mounted from said base on the side of said catch nearer said detent and between said catch and said detent with its pivot axis spaced from the pivot axis of said catch and extending substantially parallel thereto, said arm having a projection thereon extending, at least in part, toward said detent and being free to move with respect to said detent when the latter is in one of said positions thereof but being engageable with said detent in the other position thereof to prevent movement of said arm with respect to said detent, and means on said catch engageable with said arm for preventing rotation of said catch around its axis in a direction opposite to said first direction when said projection on said arm is in engagement with said detent.

8. A strike as set forth in claim 7, wherein said projection on said arm engages said detent when the latter is in said second position.

9. A strike as set forth in claim 7, wherein said projection on said arm engages said detent when the latter is in said first position.

10. A strike as set forth inclaim 9, wherein said projection on said arm is L-shaped and the portion thereof spaced from said arm is spaced from the latter by an amount sufficient to permit said detent to pass between said arm and said portion when said detent is in said second position.

1 l An electric strike comprising a relatively long and narrow base, a catch pivotally mounted from said base with its pivot axis extending transversely to the length of said base, stop means on said base for limiting movement thereof in a first direction around the pivot axis thereof, spring means acting between said base and said catch and urging said catch in said first direction, an electrically energizable solenoid with an axially moveable core mounted on said base with the axis thereof extending transversely to the pivot axis of said catch, with the solenoid spaced from said catch in the direction of the length of said base and with a portion of said core extending from said solenoid on the side thereof opposite from said catch, said portion of said core moving in a direction toward the interior of said solenoid upon energization of the latter, a detent pivotally mounted from said base intermediate said solenoid and said catch and with the pivot axis thereof extending substantially parallel to the pivot axis of said catch, a lever pivotally connected at one end to said portion of said core and extending to and being pivotally connected to a portion of said detent spaced from the pivot axis thereof, said lever moving said detent from a first position nearer said solenoid to a second position nearer said catch upon energization of said solenoid, spring means urging said detent and said portion of said core away from said catch and urging said detent into said first position thereof, an arm pivotally mounted from said base with its pivot axis spaced from the pivot axis of said catch and extending substantially parallel thereto, said arm having a projection thereon extending, at least in part, toward said detent and being free to move with respect to said detent when the latter is in one of said positions thereof but being engageable with said detent in the other position thereof to prevent movement of said arm with respect to said detent, and means on said catch engageable with said arm for preventing rotation of said catch around its axis in a direction opposite to said first direction when said projection on said arm is in engagement with said detent.

12. A strike as set forth in claim 1 1, wherein said projection on said arm engages said detent when the latter is in said second position.

13. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from one end of said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid and said solenoid being mounted with its opposite end adjacent said detent, and interconnecting means pivotally connected at a first portion thereof to said core and pivotally connected at a second portion thereof spaced from said first portion in a direction generally parallel to the direction of movement of said core to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

14. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid being mounted with said portion of said core and said detent at the same side thereof and said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and a U-shaped rod pivotally connected at one end to said portion of said core and at its opposite end to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

15. An electric strike comprising a pivotally mounted catch, a detent plate pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, the pivot axis of said plate extending transversely to the pivot axis of said catch, said catch having a projection thereon in the form of a pin which extends generally parallel to said pivot axis of said catch, said detent plate having a surface which extends radially from the pivot axis of said plate and said pin being engageable with said surface of said plate in one of said positions for preventing rotation of said catch and movable with respect to said surface of said plate in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and interconnecting means pivotally connected at a first portion thereof to said core and pivotally connected at a second portion thereof spaced from said first portion in a direction generally parallel to the direction of movement of said core to said detent plate for moving said detent plate from said second position to said first position upon movement of said core in said direction.

16. An electric strike comprising a pivotally mounted catch, a detent mounted for movement from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said detent in one of said positions for preventing rotation of said catch and movable with respect to said detent in the other position thereof to permit rotation of said catch, said means comprising a pivotally gized, causing said portion of the core to move in a direction toward the interior of said solenoid said solenoid being mounted with said detent at one side thereof and with said portion of said core at the opposite side thereof and interconnecting means pivotally connected to said corev and to said detent for moving said detent from said second position to said first position upon movement of said core in said direction;

Claims (16)

1. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, and electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid and an interconnecting member extending from said core to said detent and pivotally connected at one end thereof to said core and pivotally connected at the other end thereof to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

2. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and a U-shaped rod pivotally connected at one end to said pOrtion of said core and at its opposite end to said detent for moving said detent from said second position to said first position upon movement of said core in said direction, said rod having its intermediate portion extending alongside said solenoid.

3. A strike as set forth in claim 2, wherein said means engageable with said detent comprises a pivotally mounted arm having its pivot axis parallel to the pivot axis of said catch and having an projection thereon upstanding therefrom in the direction of said pivot axis and engageable with said detent in said one position thereof, said catch having means thereon engageable with said arm for preventing rotation of said arm with respect to said catch in a predetermined direction but permitting rotation of said arm with respect to said catch in a direction opposite to said predetermined direction.

4. A strike as set forth in claim 3, wherein said projection on said arm is engageable with said detent in said first position of the latter.

5. A strike as set forth in claim 3, wherein said projection on said arm is engageable with said detent in said second position of the latter.

6. An electric strike as set forth in claim 2, wherein said means engageable with said detent comprises a projection on said catch spaced from the pivot axis of said catch and extending therefrom in the direction of said detent.

7. An electric strike comprising a relatively long and narrow base, a catch pivotally mounted from said base with its pivot axis extending in the direction of the length of said base, stop means on said base for limiting the movement of said catch in a first direction around the pivot axis thereof, spring means acting between said base and said catch and urging said catch in said first direction, an electrically energizable solenoid with an axially moveable core mounted on said base with the axis thereof extending substantially parallel to the pivot axis of said catch, with the solenoid spaced from said catch in the direction of the length of said base and with a portion of said core extending from said solenoid on the side thereof opposite from said catch, said portion of said core moving in a direction toward the interior of said solenoid upon energization of the latter, a detent pivotally mounted from said base intermediate said solenoid and said catch and with the pivot axis thereof extending transversely to the pivot axis of said catch, a lever pivotally connected at one end to said portion of said core and extending to and being pivotally connected to a portion of said detent spaced from the pivot axis thereof, said lever moving said detent from a first position nearer said solenoid to a second position nearer said catch upon energization of said solenoid, spring means urging said detent and said portion of said core away from said catch and urging said detent into said first position thereof, an arm pivotally mounted from said base on the side of said catch nearer said detent and between said catch and said detent with its pivot axis spaced from the pivot axis of said catch and extending substantially parallel thereto, said arm having a projection thereon extending, at least in part, toward said detent and being free to move with respect to said detent when the latter is in one of said positions thereof but being engageable with said detent in the other position thereof to prevent movement of said arm with respect to said detent, and means on said catch engageable with said arm for preventing rotation of said catch around its axis in a direction opposite to said first direction when said projection on said arm is in engagement with said detent.

8. A strike as set forth in claim 7, wherein said projection on said arm engages said detent when the latter is in said second position.

9. A strike as set forth in claim 7, wherein said projection on said arm engages said detent when the latter is in said first position.

10. A strike as set forth in claim 9, wherein said projection oN said arm is L-shaped and the portion thereof spaced from said arm is spaced from the latter by an amount sufficient to permit said detent to pass between said arm and said portion when said detent is in said second position.

11. An electric strike comprising a relatively long and narrow base, a catch pivotally mounted from said base with its pivot axis extending transversely to the length of said base, stop means on said base for limiting movement thereof in a first direction around the pivot axis thereof, spring means acting between said base and said catch and urging said catch in said first direction, an electrically energizable solenoid with an axially moveable core mounted on said base with the axis thereof extending transversely to the pivot axis of said catch, with the solenoid spaced from said catch in the direction of the length of said base and with a portion of said core extending from said solenoid on the side thereof opposite from said catch, said portion of said core moving in a direction toward the interior of said solenoid upon energization of the latter, a detent pivotally mounted from said base intermediate said solenoid and said catch and with the pivot axis thereof extending substantially parallel to the pivot axis of said catch, a lever pivotally connected at one end to said portion of said core and extending to and being pivotally connected to a portion of said detent spaced from the pivot axis thereof, said lever moving said detent from a first position nearer said solenoid to a second position nearer said catch upon energization of said solenoid, spring means urging said detent and said portion of said core away from said catch and urging said detent into said first position thereof, an arm pivotally mounted from said base with its pivot axis spaced from the pivot axis of said catch and extending substantially parallel thereto, said arm having a projection thereon extending, at least in part, toward said detent and being free to move with respect to said detent when the latter is in one of said positions thereof but being engageable with said detent in the other position thereof to prevent movement of said arm with respect to said detent, and means on said catch engageable with said arm for preventing rotation of said catch around its axis in a direction opposite to said first direction when said projection on said arm is in engagement with said detent.

12. A strike as set forth in claim 11, wherein said projection on said arm engages said detent when the latter is in said second position.

13. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from one end of said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid and said solenoid being mounted with its opposite end adjacent said detent, and interconnecting means pivotally connected at a first portion thereof to said core and pivotally connected at a second portion thereof spaced from said first portion in a direction generally parallel to the direction of movement of said core to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

14. An electric strike comprising a pivotally mounted catch, a detent pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said portion of said detent in one of said positions for preventing rotation of said catch and movable with respect to said portion of said detent in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid being mounted with said portion of said core and said detent at the same side thereof and said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and a U-shaped rod pivotally connected at one end to said portion of said core and at its opposite end to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

15. An electric strike comprising a pivotally mounted catch, a detent plate pivotally mounted for movement of a portion thereof from a first position near said catch to a second position farther from said catch, the pivot axis of said plate extending transversely to the pivot axis of said catch, said catch having a projection thereon in the form of a pin which extends generally parallel to said pivot axis of said catch, said detent plate having a surface which extends radially from the pivot axis of said plate and said pin being engageable with said surface of said plate in one of said positions for preventing rotation of said catch and movable with respect to said surface of said plate in the other position thereof to permit rotation of said catch, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid, and interconnecting means pivotally connected at a first portion thereof to said core and pivotally connected at a second portion thereof spaced from said first portion in a direction generally parallel to the direction of movement of said core to said detent plate for moving said detent plate from said second position to said first position upon movement of said core in said direction.

16. An electric strike comprising a pivotally mounted catch, a detent mounted for movement from a first position near said catch to a second position farther from said catch, means controlled by said catch and engageable with said detent in one of said positions for preventing rotation of said catch and movable with respect to said detent in the other position thereof to permit rotation of said catch, said means comprising a pivotally mounted arm having its pivot axis parallel to the pivot axis of said catch and having an upstanding L-shaped projection thereon engageable with said detent in said second position thereof and permitting said detent to pass between said projection and said arm in the first position of said detent, an electrically energizable solenoid with a movable core therein with a portion thereof extending from said solenoid, said solenoid, when energized, causing said portion of the core to move in a direction toward the interior of said solenoid said solenoid being mounted with said detent at one side thereof and with said portion of said core at the opposite side thereof and interconnecting means pivotally connected to said core and to said detent for moving said detent from said second position to said first position upon movement of said core in said direction.

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