US3385622A - Latch and lock mechanism - Google Patents

Description

May 28, 1968 l.. D. wlNGx-:R y 3,385,622

LATC AND LOCK MECHANISM Filed May 16, 1966 f 2 Sheets-Sheet 1 38 44FIGJ3S 45 392O 56 57 45 41 F|G.24o 35 x x x INVENTOR. LORIN D.WINGER F|G.e 75 75 FIG 7 BY# 74 l 4 74 cdi/2id s A ATTORNEY May 28, 1968 l.. D. WINGr-:R 3,385,622

LATCH AND LOCK MECHANISM Filed May 16, 1966 2 Sheets-Sheet 2 @l r/92,9| 69 l 4 86 u |22i j 93 O01 99l 0,2 |05 98 f. A P., Il 1NvENToR.- /uq h Nvu 24 'I LQRlN D WINGER "Y Jmdc.

'sus FIGAJS o '27 5 AT ToRNl-:Y

United States Patent O 3,385,622 LATCH AND LCK MECHANISM Lorin D. Winger, Everett, Wash. (5907 California Ave. SW., Seattle, Wash. 98116) Filed May 16, 1966, ser. Nu. 559,343 2 Claims. (Cl. 292-170) ABSTRACT GF THE DISCLOSURE A large tubular knob shank housing extends crosswise through \a door, a smaller tubular bolt housing having a bolt in it extends inwardly from an edge of the door and crosswise through holes in the knob shank housing. A longitudinally movable knob shank having a knob on each end extends lengthwise through the knob shank housing and crosswise through holes in the bolt housing and carries devices which will retract the bolt when the knob shank is moved lengthwise in the direction the door must be moved to open it.

My invention relates to improvements in latch and lock mechanism.

Conventional lock and latch mechanism, as ordinarily used on doors makes it necessary for a person to perform two distinct acts in opening the door, the iirst being the turning `of a knob or pressing of a lever .or similar operation to release the bolt and the second being the exertion of Aa push or pull to open the door.

An object of my invention is to simplify the opening of a latched door by making it possible to open the same by merely exerting a push or pull on the knob or handle of the same.

Another object is to provide latch and lock mechanism having -a bolt by which a door is held closed and having bolt operating means by which said bolt can be retracted by a substantially straight push or pull applied in the direction of opening movement of the door to a knob or handle by which the door is opened and closed.

Another object is to provide ya latch and lock mechanism which can be installed in a door by boring two intersecting holes in the door and without requiring any mortising of the door.

Other objects are to provide a latch and lock mechanism of simple and inexpensive construction which can be easily and quickly installed in a door and is reliable and elicient in its operation.

Other objects will be lapparent from the following description and accompanying drawings.

FIGURE l is a horizontal sectional view of my latch and lock mechanism showing the same installed in a door, a fragment .of the door being shown in a closed position with a bolt in latched engagement with a door jamb.

FIG. 2 is a fragmentary sectional view taken substantially onbroken line 2 2 of FIG. l, parts being shown in elevation.

FIG. 3 is a fragmentary sectional view taken substantially on broken line 3-3 of FIG. l, parts being shown in elevation.

FIG. 4 is a detached fragmentary elevational View of a tubular knob shank housing shown in FIGS. l to 3.

FIG. 5 is a detached fragmentary elevational view of a tubular b'olt housing.

FIG. 6 is a detached fragmentary elevational view of a tubular knob shank.

FIG. 7 is a fragmentary view, partly in section and partly in plan, of knob shank locking means of modified form.

FIG. 8 is a vertical sectional view, with parts in elevation, showing a modied form of my invention in which handles are used instead of knobs.

FIG. 9 is a view, partly in section and partly in plan, taken substantially on broken line 9-9 of FIG. 8.

FIG. 10 is a horizontal sectional view of latch and lock means similar to those shown in FIGS. l to 7 but which uses a ilat tube as ya knob shank housing and a tiat bar as a push and pull type knob shank.

FIG. 11 is a sectional view, with parts in elevation, taken substantially on broken line 11-11 of FIG. 10.

FIG. 12 is a sectional view, with parts in elevation, taken substantially on broken line 12-12 of FIG. l0.

FIG. 13 is a detached perspective view of a flat guide tube or housing for a hat knob shank of the type used in FIGS. l0 to l2.

FIG. 14 is a detached perspective View of said flat knob shank.

FIG. 15 is a fragmentary sectional view, with parts in plan, showing |a latch bolt movably supported in a door jamb and latch bolt push-back means carried by a door and operating in accordance with my invention to release said latch bolt.

FIG. 16 is a fragmentary sectional view, partly in elevation, taken substantially on broken line 16-16 of FIG. 15.

The form of invention shown in FIGS. l to 6 includes a tubularknob shank housing 18 which extends transversely through asuitable bore 19 in adoor 20. Atubular knob shank 21, of smaller diameter than thehousing 18 extends coaxially through thehousing 18 and has twoknobs 22 and 23, preferably of flat disc like shape, attached to its respective ends. In the illustrative embodiment herein shown theknob 23 is an outside knob and theknob 22 an inside knob. Theknob 22 is welded or otherwise rigidly attached to theshank 21. Theknob 23 has a short axially disposedtube 24, of smaller diameter than theshank 21, welded or otherwise rigidly attached to it and protruding perpendicularly therefrom. Theshort tube 24 ts telescopically within an end portion of theshank 21 and one or more somewhat resilient, outwardly displaced barbs orpawls 25 of saidtube 24 lit withinperforations 26 in theshank 21 and secure the twoparts 21 and 24 together in `assembled relation. Thebarbs 25 `andperforations 26 provide for easy assembly of theknob shank 21 andtube 24 throughhousing 18 and saidparts 21 and 24 can be dis-assembled by pressing the barbs -25 inwardly. The end portion of housing `13 which protrudes from the side of thedoor 20 adjacentouter knob 23 is externally threaded andan internally threaded angedfitting 27 is provided for threaded engagement with said housing tlg and can be secured to thedoor 20 byscrews 28. The outer end portion of thehousing 18 is inwardly bent to provide a part 2-9 which makes close contact with theknob shank 21.

The end portion of the housing l18 adjacent theinner knob 22 protrudes from thedoor 20 and has a rigidly attached door plate orflange 30 which engages with the door. An inwardlybent part 31 on the inner end ofhousing 18 provides slidable engagement with theknob shank 21 and serves as means with which a locking member may engage, as hereinafter explained. A relativelyshort tube 32 of slightly larger diameter than thehousing 18 is rigidly attached to the inner face of theinside knob 22 and tits telescopically over thehousing 18. Acompression spring 33 is provided within the space between theshort tube 32 andknob shank 21 and yieldingly urges the assembly, which includesknob shank 20 andknobs 22 and 23, into the position shown in FIG. 1.

Abore 34 extends from the front edge of thedoor 20 inwardly and intersects thetransverse bore 19 with the axes of the two bores disposed in a common plane at right angles to the length of the door. Atubular bolt housing 35, of smaller diameter than theknob shank housing 18, is disposed within thebore 34 and extends through asuitable opening 36 in said knobshank housing 18. The inner end portion of the bolt housing has alignedtransverse openings 37, FIG. 5, and theknob shank 21 extends through saidopenings 37. Aface plate 39 is rigid with the outer end of thebolt housing 35 and is secured to the edge of thedoor 20.

A bolt comprising twoparts 40 and 41 is reciprocable in thebolt housing 35. Thebolt part 40 is of flat metal and has a downwardly bentouter end 42 to which thebolt part 41 is rigidly secured. Saidbolt part 41 is beveled on one side making it of conventional latch bolt shape. Saidbolt part 41 is guided in theface plate 39 and in a guide `member 43 which is rigid with theface plate 39 andbolt housing 35. Thebolt part 41 engages in the usual manner with astrike plate 44 on adoor jamb 45 which carries adoor stop 46.

The inner end portion of thebolt part 40 passes through two transversely alignedelongated openings 47, see also FIG. 6, in thetubular knob shank 21. Preferably the inner end of thebolt part 40 is guided in a suitable opening in anend part 49 of the -bolt housing 35 and astop pin 50 extends through it and limits outward movement of thebolt 40, 41.

Devices are provided for utilizing longitudinal movement of thetubular knob shank 21 in one direction to retract thebolt 40, 41. Movement ofshank 21 in an opposite direction is limited bycollar 38. The devices shown in FIGS. l, 2 and 3 for doing this comprise acam roller 51 secured to abearing pin 52 which is journaled in abearing tube 53.Tube 53 is rigid with thebolt part 40 and extends downwardly therefrom. Theroller 51 is adapted to be engaged by aninclined surface 54 of acam 55 which is rigid with theknob shank 21. Obviously thebearing pin 52 can be rigid with thebolt part 40 and thecam roller 51 can be rotatable on saidpin 52. The use of a cam roller provides rolling contact and contributes to ease of operation but it will be understood that thecam surface 54 will retract thebolt 40, 41 if it is caused to react against a non-rotatable member which is rigid with thebolt part 40.

Acompression spring 56 is provided between theend portion 42 ofbolt part 40 and aspring support member 57 which is rigid with thebolt housing 35.Spring 56 urges thebolt 40, 41 into the latched position in which it is shown in FIGS. 1, 2 and 3.

In installing the latch of FIGS. 1 to 6, the two intersectingholes 19 and 34 are bored in the door; theknob shank housing 18 is then inserted and theflanged fitting 27 applied and tightened against the door to hold saidhousing 18 immovable; the latch 'bolt housing 35, with thelatch bolt 40, 41 andspring 56 andspring support 57 is then inserted in thebore 34 and extends through theopenings 36 in thehousing 18; then, with thespring 33 in theshell 32, theknob shank 21, which hasslots 47 to provide clearance forbolt part 40, is inserted lengthwise through thehousing 18 and through thetransverse holes 36 in thelatch bolt housing 35. Theoutside knob 23 with its rigidly attachedtube 24 is then applied and thebarbs 25 caused to snap into theperforations 26 to complete the assembly.

When this device is operating as a latch if a person approaches the door from the side toward which it swings in opening, which would be the side bearing theknob 23, all he needs to do is pull on theknob 23 and this pull will retract the bolt and open the door. If he approaches the door from the side opposite the direction in which it swings in opening, namely the side on which theknob 22 is disposed, a push on saidknob 22 will retract the bolt and open the door.

Preferably devices are provided in connection with theinside knob 22 to lock theshank 21 against endwise movement by a pull exerted on theoutside knob 23. This makes it possible to lock the door so it can not be opened `from the outside ybut does not prevent retractile movement of thebolt 40, 41 by engagement with thestrike plate 44 in closing the door. One set of devices which thus lock theknob shank 21 is shown in FIG. 1 and comprises apin 59 rotatively supported by theinner knob 22. Thepin 59 has a preferablyllat finger piece 60 on its outer end by which it may be turned and has, on its inner end a cam 61 which engages with a atspring 62 that carries a normally retracted lockingpawl 63. Thepawl 63 can be moved outwardly through aperforation 64 in theshank 21 from an unlocked to a locked position relative to aninturned end 31 ofhousing 18 by turning thepin 59. Thespring 62 is secured to theshank 21.

The modiiied locking means shown in FIG. 7 comprises apawl 63 and spring 62' which operate similarly to those just described. A longitudinallymovable pin 59 supported by aninner knob 22 engages with the spring 62', and when pushed inwardly, will move thepawl 63 from an unlocked to a locked position. An inwardly bentresilient end portion 65 ofspring 62 engages within spaced apart detentgrooves 66 and 67 in thepin 59 and yieldingly holds said pin in its unlocked and locked positions respectively.

FIGS. 8 and 9 show an embodiment of my invention in which anoutside handle 70 and aninside handle 71 are provided on adoor 72 for operating latch and lock mechanism which is similar in construction and mode of operation to that just hereinbefore described. The lower end portion of each handle 70 and 71 is forked and has an upwardly extendingnotch 73 which fits over an annularly grooved end part of across pin 75 that extends through thedoor 72. Awasher 76 may be provided on each end portion ofpin 75 between the forked lower end part of each handle and the door. The upper end portions of the twohandles 70 and 71 are connected respectively bypivots 77 and 78 with the opposite ends of a push-pull type shank 79. Theshank 79 extends transversely through thedoor 72 and throughtransverse openings 80 in a tubular `bolt housing 81 and throughflanged door plates 82. Theplates 82 can be circular and they are secured to thedoor 72 and serve as guide and bearing members to slidably support theshank 79 and as stops for engagement bylugs 83 on thehandles 70 and 71.

Thebolt housing 81 is similar to the previously describedbolt housing 35 and it has therein a `bolt 40', 41', which is similar to thebolt 40, 41 and is mounted and guided in a similar manner and is urged outwardly by aspring 56. Alug 84 is secured to the bolt part 40' above theshank 79 and extends downwardly from said bolt part 40' into the path of movement of an inclined cam face 54' which is shown to be integral withshank 79 but can be attached to said shank.

Thespring 56 yieldingly urges thebolt 40', 41 into an outwardly protruding position, and in so doing, causes thelug 84 to press against thecam surface 54 and yieldingly hold the two door handles in the position in which they are shown in FIG. 8. Obviously if thedoor 72 is closed and latched a pull exerted on theouter handle 70 or a pressure exerted on theinner handle 71 will retract thelatch bolt 40', 41 and open the door. A lockingpin 69 guided in a mountingmember 69 can be moved longitudinally into and out of arecess 68 in theshank 79. This enables a person on the inside of the door to lock theshank 79 so that, when the door is in a closed position, thebolt 40', 41 can not be retracted and the door opened by a person on the outside.

The latch and lock disclosed in FIGS. 10 to 14 comprises a llat tubularknob shank housing 85 extending crosswise through adoor 86 and secured to said door byangle brackets 87. Aflat knob shank 89 extends through and is supported and guided by saidhousing 85. An outer knob 9) and an inner -knob 91 are secured to the respective ends of said knob shank byangle brackets 92. The top wall of theknob shank housing 85 is cut away, as best shown in FIG. 13, to provide clearance for acam 93 which is secured to theknob shank 89. Thecam 93 has aninclined surface 94 positioned to engage with aroller 95 on ashaft 96 supported in a bearingtube 97. Thetube 97 is rigid with a bolt which is made up of threeparts 98, 99 and 100. The inner end ofbolt part 98 is guided in anend part 101 of ahousing 102. Thehousing 102 is similar to previously describedbolt housing 35.

Locking means, which is accessible only from the inside of the door, is provided to lock thebolt part 98 against inward movement by thecam 93 and thus lock thedoor 86 against entrance from the outside when it is closed. As illustrative of one means for doing this I show, in FIG. 12, alocking pin 103 supported in asleeve 104 and longitudinally movable between the retracted position, in which it is shown, and a position in which it extends back of the bearingtube 97 and will block retractile movement of thebolt part 98. A spring 107 yieldingly urges thebolt part 100 outwardly. To prevent thepin 103 from blocking retraction of thebolt parts 99 and 100 when saidpin 103 is in a locking position and saidbolt part 100 engages astrike plate 104 as the door is being moved toward a closed position, I provide for telescopically shortening the bolt. One way to do this is to bend edge portions of the bolt part`99 downwardly and inwardly as indicated by 105, thereby forming tracks which telescopically receive the edge portions of thebolt part 98. Stop lugs 106 are provided on the outer end oflock part 98 to contact the ends of the track-formingedge portions 105 ofbolt part 99 and limit elongation of the twoparts 98 and 99.

The latch and lock shown in FIGS. to 14 operates in substantially the same manner as the previously described latch and lock shown in FIGS. 1 to 7.

FIG. discloses a modified form of my invention in which a latch bolt 110 is longitudinally movable in a flanged guide tube 111 which is supported in adoor jamb 112. Aspring 113 urges the bolt 110 outwardly and stopshoulders 114 on the inner end of the bolt limit its outward movement. The bolt 110 is adapted to protrude into and engage with a face orstrike plate 115 on adoor 116 to hold said door closed and knob or handle operated devices similar to those previously described herein are provided in thedoor 116 to push the bolt 110 outwardly into an unlocked position. These knob or handle operated devices include a bolt push-back member 117 in atubular housing 118 in the door. The push-back member 117 is guided for longitudinal movement in aguide plate 119 and anend part 120 of thehousing 118 and it has a downwardly extendingend member 121 similar topart 42 of FIG. 2 to contact the bolt 110. Twotabs 122 on theguide plate 119 limit inward movement of the push-back member 117 and a stop pin 123 in the inner end of saidmember 117 limits outward movement thereof. Atension spring 124 connected between theend member 121 and atab 125 ofhousing 118 yieldingly urges push-back -member 117 into a retracted position.

Aroller 126, similar torollers 51 and 95, is carried by push-back member 117 and is positioned to be engaged by acam 127 on aknob shank 128. Theshank 128 is similar toshank 89 and is similarly guided inhousing 129. Thespring 124 normally holds the push-back member 117 andshank 118 in the retracted position shown in FIG. 15. Movement ofshank 128 andcam 127 toward theroller 126 will move push-back member 117 outwardly and this will move the bolt 110 into an unlatched position.Spring 124 will return theparts 117 and 122 to the position in which they are shown in FIG. 15 as soon as they are released. Obviously locking means similar to those hereinbefore described can be provided to lock either the push-bac-k member 117 or theshank 128 so they can not be moved and the door opened from the outside when it is closed. Also it will be obvious that the devices for locking the bolts and thc knob or handle Shanks in the torms of my invention 4disclosed in FIGS. l to 14 can be omitted if desired.

The foregoing description and accompanying drawings clearly disclose preferred embodiments of my invention but it will be understood that changes in the same may be made within the scope of the following claims.

I claim:

1. In latch and lock mechanism the combination with a door supported for swinging movement in a predetermined direction from a closed position toward an open position, of a tubular knob shank housing extending transversely through said door adjacent the front edge of the door, both ends of said knob shank housing having inwardly bent end parts forming bearing means, a tubular bolt housing of smaller diameter than said knob shank housing extending from the front edge of said door into said door and transversely through said knob shank housing; a tubular knob shank of smaller diameter than said bolt housing disposed coaXially of said knob shank housing and supported for longitudinal movement by said knob shank housing and extending transversely through said bolt housing; an inside knob rigidly attached to one end of said knob shank; a short tube of slightly larger diameter than said knob shank housing rigid with and protruding from said inside knob and fitting telescopically and slidably over said knob shank housing; a compression spring on said knob shank within said short tube between said inside knob and the adjacent inwardly bent end part of said knob shank housing urging said Iknob shank and knob in the direction of closing movement of the door; stop means on the knob shank limiting movement of the knob shank by said spring; an outside knob; another short tube of smaller diameter than said knob shank rigidly secured to and protruding from said outside knob and iitting telescopically within said knob shank; releasable means securing said other short tube to said knob shank; a bolt supported for longitudinal movement in said bolt housing between a retracted position and a locking position in which it protrudes from the front edge of said door; resilient means yieldingly urging said bolt outwardly; and bolt retracting devices interposed between said bolt and said knob shank operable to move said bolt into a retracted position in response to longitudinal movement of said shank in the direction of opening movement of the door.

2. The apparatus as claimed in claim 1 in which a spring retracted locking pawl is disposed within the knob shank adjacent the inner knob, is movable longitudinally with the knob shank, and is positioned to lock against the adjacent inturned end part of the knob shank housing, the knob shank having an opening through which said pawl operates; and in which locking pawl operating means carried by the inside knob is operable in moving said locking pawl from a retracted to a locking position in which it locks the knob shank against longitudinal movement in the direction oi opening movement of the door.

References Cited UNITED STATES PATENTS 1,769,288 7/1930 Godfried et al. 292-170 2,121,531 6/1938 Murphy 292-337 2,383,574 8/1945 Voight 292-170 2,521,111 9/1950 Ylinen 292-170 X FOREIGN PATENTS 664,451 1/ 1952 Great Britain.

MARVIN A. CHAMPION, Primary Examiner.

J. R. MOSES, Assistant Examiner.

Images