US3893722A - Latch and lock structure - Google Patents

Abstract

Latch and lock structure for a door wherein the latch includes a bolt and is pivotally mounted upon the door for movement around an axis substantially perpendicular to the plane of the door when it is in its closed position. The latch has an end portion with a recess opening radially of said axis. A bracket is secured to the door for engagement by the latch when it is in the latch position. An L-shaped lever is pivotally secured to the bracket and has an abutment on one leg thereof which is receivable into said recess when said latch is in the latched position. Actuating means engages the other leg of said L-shaped lever for pivoting same and thereby moving said abutment out of said recess. Resilient means yieldably urges said abutment means into the locked position, said actuating means limiting the amount of said urging.

Description

United States Patent [1 1 Galhreath et al.

[ LATCH AND LOCK STRUCTURE [75} inventors: Gerald W. Galbreath; Alfred T.

Dietrich; George E. Mosbarger, all of Marion, Ohio [73] Assignee: Overhead Door Corporation, Dallas,

Tex.

[22] Filed: Nov. 1, 1973 [21] Appl. No.: 411,802

[4 1 July 8,1975

Flynn [57] ABSTRACT Latch and lock structure for a door wherein the latch includes a bolt and is pivotally mounted upon the door for movement around an axis substantially perpendicular to the plane of the door when it is in its closed position. The latch has an end portion with a recess opening radially of said axis. A bracket is secured to the door for engagement by the latch when it is in the latch position. An L-shaped lever is pivotally secured to the bracket and has an abutment on one leg thereof which is receivable into said recess when said latch is in the latched position. Actuating means engages the other leg of said L-shaped lever for pivoting same and thereby moving said abutment out of said recess Resilient means yieldably urges said abutment means into the locked position, said actuating means limiting the amount of said urging.

3 Claims, 8 Drawing Figures PATENIED JUL 81975 SHEET 3 0F 3 m El 5Q l0 IO 8 m 1 LATCH AND LOCK STRUCTURE BACKGROUND OF THE INVENTION This invention relates in general to a latch and lock structure for a door and, more particularly. to a type thereof adapted for mounting upon an upwardly acting truck door, the latch means being capable of automatic self-adjustment to compensate for looseness, and a lock means including a tamper-proof device for locking the latch in the locked position whereby to provide maximum security within the truck.

Persons familiar with the manufacture, installation and maintenance of doors, particularly upwardly acting doors for truck vans, for example, have long been aware that the latch structures in such doors are subject to unusually rough treatment, even under substantially normal operating conditions. That is, truck doors and their latch structures are constantly exposed to the weather, they are often strained by the loads carried in the truck van or battered by external obstructions, and they are frequently subjected to excessive and distructive forces, sometimes intentionally for the purpose of effecting unauthorized access to the contents of the truck van.

Where looseness exists between the latch bolt on a door and the catch on the truck bed, the result is a noisy and unsightly door the movements of which tend to aggravate the wear problem and usually accelerate latch and/or lock failure. US. Pat. No. 3 642 314, which is assigned to the Assignee of this application, discloses and claims a lock structure which minimizes, if not virtually eliminates, most of the above discussed problems which develop from a loose latch and catch condition.

In order to prevent unauthorized entrance into the van of the truck, the door latch structure is usually furnished with some type of mechanism, such as a padlock, which releasably holds the latch handle in the latched position. However, this arrangement has not been altogether satisfactory, if only because it is necessary to furnish expensive padlocks which are frequently misappropriated. The latch and lock structure claimed and disclosed in U.S. Pat. No. 3,740,978 was developed in an effort to provide a tamper-proof lock for the latch structure. This patent is assigned to the Assignee of this application. The lock assembly shown in US. Pat. No. 3,746,978 was a step forward and overcame the combined problems of unauthorized entry and stolen padlocks. However, it lacks one highly desirable feature, namely, the ability to return automatically to the locked engagement with the latch handle when the latch handle is returned to its latched position. That is, the locking action is not automatic in the previous lock structure.

Accordingly, a primary object of this invention has been the provision of an improved latch and lock structure for a door, such as an upwardly acting truck door, wherein the latch mechanism is adapted to adjust automatically and thereby minimize looseness between the door and the truck bed resulting from normal wear, minor inaccuracies of installation and/or acceptable tolerances in parts, whereby the useful life of the latch and lock structure and/or the door is extended.

A further object of this invention is the provision of a latch and lock structure for a door in which the latch mechanism includes an elongated handle pivotally mounted upon the door and a spring urged catch lever which is pivotally mounted upon the door, said catch lever being engageable with the latch handle for holding same in the latched position.

A further object of this invention is the provision of a lock mechanism, as aforesaid which positively prevents pilferage of the lock mechanism, which minimizes the possibility of unauthorized opening of the lock, as by force, and which provides for an automatic locking of the latch handle when it is returned to the latched position.

Other objects and purposes of the invention will become apparent to persons familiar with latch and lock structures, particularly for upwardly acting truck doors, upon reading the following descriptive material and examining the accompanying drawings, in which:

FIG. I is a broken, fragmentary rear elevational view of a truck door and an adjacent portion of a truck bed including the latch and lock structure embodying the invention.

FIG. 2 is a broken, fragmentary rear elevational view of a truck door and an adjacent portion of a truck bed similar to that shown in FIG. I but with parts thereof in different operating positions.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 2.

FIG. 4 is a sectional view taken along the line lV-IV in FIG. 3.

FIG. 5 is a sectional view similar to that shown in FIG. 4 with parts thereof in different operating posi tions.

FIG. 6 is an enlarged view taken along the line Vl-VI in FIG. 2.

FIG. 7 is a sectional view taken along the line V"- --VI] in FIG. 6.

FIG. 8 is a sectional view taken along the line VIII- VII[ in FIG. 4.

For convenience in description, the terms upper", lower", front, rear" and words of similar import will have reference to the latch and lock structure of the invention and parts of the truck door associated therewith as appearing in FIG. 1 which discloses the rear side of the door. The terms inner, outer" and derivatives thereof will have reference to the geometric center of the latch and lock structure of the invention and parts thereof or associated therewith.

SUMMARY OF THE INVENTION The objects and purposes of the invention, including those set forth above, have been met by providing a latch and lock structure comprising catch means mounted in the bed of a truck or similar vehicle and a latch mechanism mounted upon the lower end of an upwardly acting door of the truck van and having a latch bolt including an elongated hook portion engageable with the catch means. The latch bolt is pivotally mounted upon the door and is moved into the latched position by an actuating member which is releasably held in its latching position by a tamper-proof lock mechanism. Gravity also opposes release of the latch bolt from its latched position. The actuating member is held away from its latching position by a keeper.

DETAILED DESCRIPTION The latch and lock structure of the invention, a preferred embodiment of which is disclosed in FIG. I, is comprised of alatch assembly 11 mounted upon the lower end of an upwardly actingdoor 12 for engagement with acatch assembly 13 that is mounted in thebed 14 of an otherwise substantially conventional truck van, of which thedoor 12 is a part. Thedoor 12 may be comprised of a plurality of horizontally hinged sections which are disposed in a substantially vertical plane, when the door is closed, and in a substantially horizontal plane near the roof of the van when the door is open. A resiliently flexible weather seal 15 (FIG. I) is mounted on the lower edge of thedoor 12 and is engageable with thebed 14 in a conventional manner and for conventional purposes.

The catch assembly 13 (FIGS. 1 and 2) is comprised of an elongated, substantiallyrectangular casing 17 having atop flange 18, a pair of sidewalls I9 and 20 (FIG. I) and a pair ofend walls 21 and 22 (FIG. 6). Thesidewalls 19, 20 and theend walls 21, 22 define acatch chamber 23 which preferably opens upwardly to receive thelatch bolt 47 and downwardly for drainage.

The top flange 18 (FIG. 1) preferably extends beyond bothend walls 21, 22 and therear sidewall 20 for engagement with theupper surface 26 of thebed 14 when thecasing 17 is located within the opening 27 in thebed 14. Thetop flange 18 may be secured to thebed 14 by welding, by screws or any other convenient, conventional means. Thecatch assembly 13 includes acatch pin 29, which is secured to and extends between thesidewalls 19 and 20 of thecasing 17 about midway between theend walls 21 and 22.

The latch assembly 11 (FIG. I) has amounting plate 31 which is secured to the rear surface of thedoor 12 adjacent the lower edge thereof by means ofrivets 32. The front end of theaxle 30 is rigidly secured to themounting plate 31 by means such as welding and/or staking.

A manually operated actuating member 33 (FIGS. 1 and 2), which is rotatably supported onaxle 30, is comprised of ahousing 34, the details of which are dis closed in said US. Pat. No. 3,642,314. The actuating member 33 (FIG. 1) has anintegral handle 43 which projects from thehousing 34 lengthwise thereof and substantially radially of theaxle 30.

The latch bolt 47 (FIG. 1) has ashank 48, which is rotatably supported at its upper end upon theaxle 30, and an elongated,arcuate hook 49 integral with the outer end of theshank 48 and having a slightly cammedinner surface 51. The portion ofsurface 51adjacent shank 48 is nearer toaxle 30 than is the portion ofsurface 51 adjacent the free end of thehook 49. The center of gravity of thelatch bolt 47, when it is pivotally supported byaxle 30 is near theshank 48. Thus gravity urgeslatch bolt 47 into its locked position of FIG. 2.

An unlatched keeper 53 (FIGS. 1 and 2) is pivotally mounted upon apivot pin 54 which is rigidly secured to the mountingplate 31 near thehousing 34. Thekeeper 53 has ahook 56 near one end which is engageable with a flange 57 (FIG. 2) on thehousing 34 whereby the actuatingmember 33 andbolt 47 are held in their unlatched positions, which are approximately 180 from their latched positions of FIG. 2.

The free or rightward end of the handle 43 (FIGS. 1 and 2) has a C-shapedportion 61 which, in this embodiment opens radially outwardly, relative to theaxle 30.

The lock assembly 62 (FIGS. 4 through 8), which includes theportion 61 ofhandle 43, also includes the rectangular casing 63 (FIG. 3) which has atop wall 65,bottom wall 66,rear sidewall 67 and endwalls 69 and 70. A pair offlanges 72 and 73 (FIG. 7) which are integral with and preferably perpendicular to theend walls 69 and 70, extend away therefrom for mounting thecasing 63 on thedoor 12 by means such asrivets 74.

The top andbottom walls 65 and 66 (FIG. 8) haveopenings 76 and 77, respectively. Thelower leg 78 andbight 79 of the C-shapedportion 61 can move throughopening 76 into the positions thereof shown in FIG. 4 from the positions thereof shown in FIG. 1. When the C -shapedportion 61 is in its FIG. 4 position, lateral extensions of the upper leg 82 (FIG. 7) bear against the upper surface of thetop wall 65 to positively limit downward movement of theportion 61.

Apivot axle 85 is rigidly secured, as by brazing or staking, to therear side wall 67 so that it extends toward thedoor 12 near the lower edge thereof. A substantially L-shapedcatch lever 86 is pivotally supported near the intersection of thearms 87 and 88 thereof for movement around a horizontal axis which, in this embodiment, is preferably parallel with the pivotal axis of theaxle 85. Thecatch arm 87, which has a hook orprojection 89 near its upper end, is laterally offset rearwardly from the lockingarm 88.

The upper edge of the catch arm and its attachedhook 89 have a downwardly and leftwardly slopingupper surface 92 which permits thelower leg 78 of the C-shapedportion 61 to slide therealong as it moves downwardly through theopening 76, thereby causing thearm 87 to pivot rightwardly away from theportion 61. Acoil spring 93 has one end thereof anchored upon thecasing 63, the other end thereof being hooked around thecatch arm 87 whereby said catch arm is continuously urged into its locking position with the C- shapedportion 61, as shown in FIGS. 4 and 6. A substantiallyconventional lock cylinder 94 is mounted upon therear sidewall 67 so that it extends axially toward the lower edge of thedoor 12. This is the reason for the offset of thearm 87 rearwardly form thearm 88. Acrank 96 is included in the lock cylinder assembly and has acrank pin 97 which is engageable with the upper edge of the lockingarm 88 near its outer end, as shown in FIGS. 4, 6 and 7, for rotating thecatch lever 86 around itsaxle 85 from the locked position of FIG. 4 into the unlocked position of FIG. 7, while overpowering the contrary urging of thespring 93.

Thelock cylinder 94 may be one of at least two different types. For example, the lock cylinder may be up erated by a key 98 (FIG. 3) which cannot be removed unless it is in the vertical plane. This assures that thehandle 43 will always be positively prevented from moving upwardly away form thecasing 63 if saidhandle 43 has been moved into its latched position where the lateral extensions (FIG. 8) on theleg 82 have come into bearing engagement with the upper surface of thetop wall 65. That is, with theupper leg 82 bearing against thetop wall 65 of thecasing 63 thebook 89 will automatically move into its locked position of FIG. 4 due to urging by thespring 93.

On the other hand, thelock cylinder 94 may be of the type wherein the key can be removed after the lock has been rotated as appearing in FIG. 2. In such case, thecrank 96 and itspin 97 acting through the catch lever, will continue to hold thecatch arm 87, away from engagement with theportion 61 of thehandle 43. In that case, thehandle 43 can be freely moved between positions where thebolt 47 is in and out of engagement with thecatch pin 29.

It will be seen that the C-shapedportion 61 can open radially inwardly, relative to theaxle 30, and produce the same results provided that thecatch lever 86 is mounted upon the opposite side. namely the left side. of the C-shapedportion 61, as it appears in FIG. 5.

OPERATION The operation of the door latch and lock structure described above will be apparent from such description to a person of ordinary skill in the manufacture of truck door latches and locks. However, primarily for the pur pose of convenience, the latch and lock operation will now be summarized.

When it becomes desirable to unlatch theassembly 11, the key 98 (FIG. 2) is turned 90 in the clockwise direction, whereby thehook 89 is moved sidewardly away from thelower leg 78 of the C-shapedportion 61, as shown in FIG. 7. The C-shapedportion 61 can now be moved upwardly away from the casing so that the handle 43 (FIG. 1) can be raised and pivoted around theaxle 30, whereby thehook 49 oflatch bolt 47 is moved from beneath thepin 29. After thebolt 47 is released from thepin 29, continued counterclockwise movement of thehandle 43 brings the flange 57 (FIG. 2) into engagement with thehook 56 whereby thehandle 43 is held in its unlatched or inoperative position.

When it becomes desirable to relatch the door and lock the handle in latched position, thehook 56 is released from theflange 57 and thehandle 43 is rotated in the clockwise direction (FIG. 1) so that the C- shapedportion 61 can move through theopening 76 in the top wall of thecasing 63. During such movement of thehandle 43, thehook 49 of thelatch bolt 47 slides under and engages thepin 29 in thecatch assembly 13. During the downward movement of thehandle 43, thedoor 12 is forced downwardly so that the seal will be in engagement with thebed 14 of the truck van.

As the latch handle 43 is moved into its latched position, thelower leg 78 of C-shapedportion 61 slides down the upper sloped surface of thehook 89, thereby moving thecatch arm 87 rightwardly. When theupper leg 82 bears against thecasing 63, thespring 93 urges thecatch arm 87 in the counterclockwise direction until thehook 89 is in locked position with respect to the C-shapedportion 61. At this point, a release of thehook 89 from the C-shapedportion 61 can be achieved only by placing the proper key in thecylinder 94 and rotating it clockwise.

Although a particular preferred embodiment of the invention has been disclosed above for illustrative purposes, it will be understood that variations or modifications of such disclosure. which come within the scope of the invention are fully contemplated.

The embodiments of the invention in which an exclu sive property or privilege is claimed are defined as follows:

1. In combination, a truck van having a door frame defining an access opening into the interior of said van, a door movably supported on said van and having interior and exterior surfaces, said door being positionable in a closed position wherein it closes said access opening and being movable upwardly into an open position, catch means mounted on the bed of said van, and latch means movably mounted on said door adjacent said exterior surface and coacting with said catch means for holding said door in said closed position, said latch means including a hook-shaped latch bolt swingably mounted on said door and releasably engageable with said catch means, said latch means further including an elongated actuating handle pivotally supported on said door for swinging movement about a pivot axis and coacting with said latch bolt for controlling the movement thereof, said actuating handle being pivotally movable relative to said door between latched and unlatched positions, the improvement comprising:

bracket means fixedly mounted on said door adjacent the exterior surface thereof and projecting outwardly therefrom. said bracket means comprising a boxlike casing cooperating with said exterior sur face to define a substantially closed compartment therebetween, said compartment being totally closed except for an opening formed in the top wall of said casing; said casing also having a front wall which is spaced outwardly from and is substantially parallel to the exterior surface of said door; said actuating handle having a recessed portion de fining a recess therein, the recessed portion of said handle comprising a C-shaped portion fixedly connected to said handle adjacent the free end thereof and defining said recess which extends radially with respect to said pivot axis, the bight and the lower leg of said C-shaped portion projecting through said opening and being totally enclosed within said compartment when said handle is in said latched position, the upper leg of said C-shaped portion abutting the top wall of said casing and overlapping said opening for closing same, whereby said compartment is totally closed when the handle is in said latched position; lever means disposed within said compartment and pivotally mounted relative to said bracket means, said lever means having a projection means fixedly mounted thereon and disposed for movement between locked and unlocked positions responsive to swinging movement of said lever means, said projection means being disposed within said recess when said projection means is in said locked position and said actuating handle is in its latched position for positively preventing material movement of said handle away from said latched position; resilient means coacting with said lever means for yieldably urging said lever means in a direction whereby said projection means is automatically moved into said locked position; and key-operated release means mounted upon said bracket means and engageable with said lever means for pivoting said lever means so that said projection means is moved from its locked position into its unlocked position, said key-operated release means being operated solely by a key and being the sole means for permitting movement of said lever means away from its locked position so as to release said actuating handle, said keyoperated release means including a rotatable lock cylinder disposed within said compartment for rotation about an axis which is substantially perpendicular to the front wall of said casing, said lock cylinder being rotatably mounted solely on said front wall and having the key-receiving end thereof projecting through said front wall. 2. In combination, a truck van having a door frame defining an access opening into the interior of said van. a door movably supported on said van and positionable in a closed position wherein said door closes said access opening, said door being movable upwardly into an open position, catch means mounted on the bed of said van, and latch means movably mounted on said door and coacting with said catch means for holding said door in said closed position, said latch means including a hook shaped latch bolt swingably mounted on said door and releasably engageable with said catch means, said latch means further including an elongated actuating handle pivotally supported on said door for swinging movement about a pivot axis and coacting with said latch bolt for controlling the movement thereof, said actuating handle being pivotally movable relative to said door between latched and unlatched positions, the improvement comprising:

bracket means fixedly mounted on said door adjacent the exterior side thereof, said bracket means defining therein a substantially closed compartment; said actuating handle having a recessed portion defining a recess therein, lever means disposed within said compartment and pivotally mounted relative to said bracket means, said lever means having a projection means fixedly mounted thereon and disposed for movement between locked and unlocked positions responsive to swinging movement of said lever means, said projection means being disposed within said recess when said projection means is in said locked position and said actuating handle is in its latched position for positively preventing material movement of said handle away from said latched position; said bracket means having an opening formed therein and providing communication with said compartment, and said portion of said handle projecting into said opening when said handle is in said latched position, said handle covering and closing said opening when said handle is in said latched position; resilient means coacting with said lever means for yieldably urging said lever means in a direction whereby said projection means is automatically moved into said locked position; and

key-operated release means mounted upon said bracket means and engageable with said lever means for pivoting said lever means so that said projection means is moved from its locked position into its unlocked position, said key-operated release means being operated solely by a key and being the sole means for permitting movement of said lever means away from its locked position so as to release said actuating handle;

said lever means comprising an L-shaped lever having first and second legs laterally offset from one another and interconnected by a transversely extending intermediate portion which defines the pivot for said lever, said first leg having said projection means fixedly mounted thereon adjacent the free end thereof. and said release means including rotatable crank means disposed in engagement with said second leg.

3. The combination according to claim 2, wherein said recess opens radially relative to the pivot axis of said handle, said lever being mounted for pivoting movement about a second axis which is parallel to said pivot axis, and said release means including a rotatable lock cylinder rotatably mounted on said bracket means for rotation about a third axis which is spaced from but substantially parallel to said second axis.

Claims (3)

1. In combination, a truck van having a door frame defining an access opening into the interior of said van, a door movably supported on said van and having interior and exterior surfaces, said door being positionable in a closed position wherein it closes said access opening and being movable upwardly into an open position, catch means mounted on the bed of said van, and latch means movably mounted on said door adjacent said exterior surface and coacting with said catch means for holding said door in said closed position, said latch means including a hook-shaped latch bolt swingably mounted on said door and releasably engageable with said catch means, said latch means further including an elongated actuating handle pivotally supported on said door for swinging movement about a pivot axis and coacting with said latch bolt for controlling the movement thereof, said actuating handle being pivotally movable relative to said door between latched and unlatched positions, the improvement comprising: bracket means fixedly mounted on said door adjacent the exterior surface thereof and projecting outwardly therefrom, said bracket means comprising a boxlike casing cooperating with said exterior surface to define a substantially closed compartment therebetween, said compartment being totally closed except for an opening formed in the top wall of said casing; said casing also having a front wall which is spaced outwardly from and is substantially parallel to the exterior surface of said door; said actuating handle having a recessed portion defining a recess therein, the recessed portion of said handle comprising a C-shaped portion fixedly connected to said handle adjacent the free end thereof and defining said recess which extends radially with respect to said pivot axis, the bight and the lower leg of said C-shaped portion projecting through said opening and being totally enclosed within said compartment when said handle is in said latched position, the upper leg of said C-shaped portion abutting the top wall of said casing and overlapping said opening for closing same, whereby said comparTment is totally closed when the handle is in said latched position; lever means disposed within said compartment and pivotally mounted relative to said bracket means, said lever means having a projection means fixedly mounted thereon and disposed for movement between locked and unlocked positions responsive to swinging movement of said lever means, said projection means being disposed within said recess when said projection means is in said locked position and said actuating handle is in its latched position for positively preventing material movement of said handle away from said latched position; resilient means coacting with said lever means for yieldably urging said lever means in a direction whereby said projection means is automatically moved into said locked position; and key-operated release means mounted upon said bracket means and engageable with said lever means for pivoting said lever means so that said projection means is moved from its locked position into its unlocked position, said key-operated release means being operated solely by a key and being the sole means for permitting movement of said lever means away from its locked position so as to release said actuating handle, said keyoperated release means including a rotatable lock cylinder disposed within said compartment for rotation about an axis which is substantially perpendicular to the front wall of said casing, said lock cylinder being rotatably mounted solely on said front wall and having the key-receiving end thereof projecting through said front wall.

2. In combination, a truck van having a door frame defining an access opening into the interior of said van, a door movably supported on said van and positionable in a closed position wherein said door closes said access opening, said door being movable upwardly into an open position, catch means mounted on the bed of said van, and latch means movably mounted on said door and coacting with said catch means for holding said door in said closed position, said latch means including a hook-shaped latch bolt swingably mounted on said door and releasably engageable with said catch means, said latch means further including an elongated actuating handle pivotally supported on said door for swinging movement about a pivot axis and coacting with said latch bolt for controlling the movement thereof, said actuating handle being pivotally movable relative to said door between latched and unlatched positions, the improvement comprising: bracket means fixedly mounted on said door adjacent the exterior side thereof, said bracket means defining therein a substantially closed compartment; said actuating handle having a recessed portion defining a recess therein; lever means disposed within said compartment and pivotally mounted relative to said bracket means, said lever means having a projection means fixedly mounted thereon and disposed for movement between locked and unlocked positions responsive to swinging movement of said lever means, said projection means being disposed within said recess when said projection means is in said locked position and said actuating handle is in its latched position for positively preventing material movement of said handle away from said latched position; said bracket means having an opening formed therein and providing communication with said compartment, and said portion of said handle projecting into said opening when said handle is in said latched position, said handle covering and closing said opening when said handle is in said latched position; resilient means coacting with said lever means for yieldably urging said lever means in a direction whereby said projection means is automatically moved into said locked position; and key-operated release means mounted upon said bracket means and engageable with said lever means for pivoting said lever means so that said projection means is moved from its locked position into its unlocked position, said key-operated release means being opErated solely by a key and being the sole means for permitting movement of said lever means away from its locked position so as to release said actuating handle; said lever means comprising an L-shaped lever having first and second legs laterally offset from one another and interconnected by a transversely extending intermediate portion which defines the pivot for said lever, said first leg having said projection means fixedly mounted thereon adjacent the free end thereof, and said release means including rotatable crank means disposed in engagement with said second leg.

3. The combination according to claim 2, wherein said recess opens radially relative to the pivot axis of said handle, said lever being mounted for pivoting movement about a second axis which is parallel to said pivot axis, and said release means including a rotatable lock cylinder rotatably mounted on said bracket means for rotation about a third axis which is spaced from but substantially parallel to said second axis.

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