Lock assembly for showcases and other closures

July 26, 1966

D. W. GLASS

3,262,292

LOCK ASSEMBLY FOR SHOWCASES AND OTHER CLOSURES

<img file="US3262292A_D0001.tif" />

United States Patent Office

3,262,292

Patented July 26, 1966

FIG. 4 is a top plan view of the lock assembly as applied to a door utilizing an alternate embodiment of locking bar.

FIG. 5 is a side elevational view of the lock assembly 5 with the alternate embodiment of locking bar and an auxiliary locking plate utilized for locking two drawers in a cabinet.

FIG. 6 is a front elevational view of the auxiliary locking plate shown in FIG. 5.

_ Referring more particularly to the drawing wherein is disclosed an illustrative embodiment of the present invention, FIG. 1 discloses a lock assembly 10 operatively mounted on a showcase for a pair of sliding glass panels 11 and 12 for retaining the panels in locked relation.

The lock assembly includes a housing or case 13 which is preferably formed out of extruded aluminum and has a generally trapezoidal shape as seen in FIGS. 2 and 3, although the specific configuration of the housing 13 is not meant to be limiting.

A lock cylinder 14 is securely yet detachably mounted in the housing or case 13 by means of a cylinder retaining pin 15. The housing has an opening 16 at the bottom thereof and an aligned opening or hole 17 is formed in the cylinder 14 so that the pin 15 may be 25 driven into the aligned openings to retain the case and cylinder together. The opening 17 extends through the cylinder 14 whereby the pin 15 may be driven completely into the cylinder opening to release the lock cylinder 14 from the housing 13. Thus, the lock cylinder can be removed for cleaning or re-keying. The pin 15 may be retained in the cylinder 14 and a new replacement pin utilized to re-anchor the cylinder in the housing 13, or the pin may be driven completely through the opening 17 while the cylinder 14 is removed from the housing and the pin reused.

The lock cylinder 14 contains a rotatable plug 18 having a plurality of pin tumblers 19 therein which are aligned with a plurality of drivers 21 yieldably biased toward the plug by tumbler springs 22. A plug stop pin ⁴⁰ 23 extends through an opening 24 in the cylinder 14 with its inner end extending into an arcuate groove 25 in the surface of the plug 18 to retain the plug in the cylinder 14 and to limit the rotational travel of the plug.

A lock bolt 26 is mounted in a complementary open45 ing 27 in the cylinder 14 and is yieldably urged outwardly by a spring 28 having one end seated in a recess 29 in the cylinder and the opposite end extending into a recess or opening 31 in the bolt. The locking end 32 of the bolt extends through an aligned opening in the housing or case 13 and has a camming surface 33 thereon. An elongated slot 34 is formed in the side of the bolt facing the’ plug and receives a projection 35 on the inner end of the plug for actuation of the bolt.

A resilient bumper 36 is mounted in the end of the ⁰⁰ lock cylinder and thereabove, an extension 37 of the cylinder 14 is formed to overlap the bumper 36 and prevent springing of the glass panel 11 over the lock case or housing 13 to open the showcase.

The housing or case 13 is formed with a longitudinally ⁶⁰ extending generally T-shaped groove or slot 38 therethrough opening in the bottom surface as seen in FIGS. 1 and 2 to accommodate a locking bar 39. The bar includes a generally U-shaped end 41 which is adapted to engage and fit on the edge 42 of the glass panel 12. The remainder of the bar 39 is formed with a plurality of longitudinally aligned locking notches 43 which are formed in the bar by stamping or other suitable operation and form a series of projections 44 below the bar.

To utilize the locking assembly upon the sliding glass panels 11 and 12 of a showcase, the locking bar 39 is positioned on the panel 12 with the U-shaped end 41

3,262,292 LOCK ASSEMBLY FOR SHOWCASES AND OTHER CLOSURES

Dwight W. Glass, Rockford, III.; assignor to National Lock Co., Rockford, III., a corporation of Delaware 5

Filed June 19,1964, Ser. No. 376,323 4 Claims. (CI. 70—14)

The present invention relates to a novel locking device and more particularly to a portable or detachable locking device which can be conveniently used to lock showcases, doors, drawers and the like that are not ordinarily provided with locks or where the locks have become broken or defective.

. Among the objects of the present invention is the provision of a locking device for showcases, drawers and the like having a pin tumbler lock operation for high security mounted in an extruded aluminum case or housing to provide for low manufacturing costs. A springbiased bolt is mounted in the lock cylinder and urged through the side of the housing. The lock is fast and easy to operate with the bolt being actuated by the plug of the lock by turning a suitable key either to the right or left.

Another object of the present invention is the provision of a locking device having a lock cylinder which can be easily removed for re-keying or servicing of the lock. A retainer pin is driven into aligned holes in the casing and the lock cylinder to retain the cylinder therein. The cylinder can be removed by driving the retainer pin com- 30 pletely into the lock cylinder. The retainer pin hole in the cylinder is a through hole and the pin may be driven completely through the cylinder after the cylinder has been removed from the casing. The pin can then be reused, or it can be left in the cylinder and a new replace- 35 ment pin can be driven into place'when the cylinder has been reassembled into the case.

A further object of the present invention is the provision of an anti-manipulation latch type bolt in the cylinder cooperating with a locking bar. The locking bar is 40 formed with a plurality of locking notches which shield the bolt when in engagement adding to the security of the lock. The locking bars are smooth and easy to handle and are inserted through a suitably designed longitudinally extending groove or slot in the case of the locking device. 45 The locking bars are provided with a hooked end which engages the edge of a sliding door or panel or with a suitable abutment for other locking applications.

The present invention further comprehends the provision of a rubber bumper on the lock cylinder adapted 50 to engage the edge of a sliding glass panel in a showcase, and the cylinder is provided with an extension overlapping the . rubber bumper to prevent, the springing of a glass panel over the lock body for gaining entrance to the showcase. 55

The present invention also comprehends the provision of an auxiliary locking plate which cooperates with the lock body and the locking bar to provide additional locking capabilities.

Further objects are to provide a constructuion of maxi- 60 mum simplicity, efficiency, economy and ease of assembly and operation, and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.

In the drawing: ⁶⁵

FIGURE 1 is a horizontal cross sectional view of the lock assembly showing a locking bar adapted for the sliding glass panels of a showcase.

FIG. 2 is a front elevational view of the lock assem- γθ bly shown in FIG. 1 with the glass panels omitted.

FIG. 3 is a rear elevational view of the lock assembly.

3,262,292

Ο encompassing the edge 42 of the panel 12. Then with the panels in their closed position, the lock assembly 10 is slid onto the locking bar 39 and therealong until the resilient bumper 36 contacts and abuts the edge of the panel 11. The locking end 32 of the lock bolt 26 is urged into engagement with .a locking notch 43 as shown due to the spring 28. When the assembly 10 is slid onto the locking bar 39, the camming surface 33 of the lock bolt engages the surface of the locking bar and causes the bolt to retract into the case and cylinder 14; the elongated slot 34 allowing movement of the bolt relative to the projection 35 on the plug 18.

To release the lock assembly 10, a suitable key 45 is inserted into the keyway 46 in the plug 18 and the plug is rotated in either direction. Rotation of the plug causes generally vertical movement of the projection 35 which engages the upper end of the slot 34 and lifts the lock bolt 26 against the force of the spring 28 to retract the locking end 32 from the locking notch 43 in the locking bar 39 and allow relative movement of the housing or case 13 and the bar 39 to remove the case 13 therefrom and allow relative sliding movement between the panels 11 and 12.

FIG. 4 of the drawing shows the lock assembly utilizing an auxiliary locking bar 47 to lock the door 48 within its associated frame 49. The locking bar 47 is substantially identical to that shown in FIG. 1, except that it terminates in a generally V-shaped hook end 51. As shown, the hook end 51 is positioned to extend into the opening 52 of a strike plate 53 securely mounted on the door frame 49. The end 54 of the hook abuts the strike and the locking bar 47 extends outwardly from between the door and frame. The lock casing 13 is then slid onto the locking bar 47 until the projection or extension 37 of the lock cylinder 14 abuts the exterior surface 55 of the door 48. The locking bolt 26 then engages and cooperates with a locking notch 43 in the bar 47 to retain the door in closed position.

In FIG. 5 of the drawing, the lock assembly is shown with the auxiliary locking bar 47 and an auxiliary locking plate 56 for locking a drawer in a desk, cabinet or other enclosure. The locking plate 56 is generally rectangular and includes irregular openings 57, 57α at right angles (FIG. 6) which openings accommodate the locking bar 47 in any desired position. As shown in FIG. 5, the locking bar 47 is positioned between the top of the lower drawer 58 and the separating cross member 59 of the cabinet, with the end 54 of the hook end engaging the interior surface 61 of the member 59. The bar extends through the locking plate 56 and the plate extends upwardly to overlap the lower edge of an upper drawer 62. The lock assembly 10 is inserted onto the locking bar 47 so that the extension 37 abuts the locking plate 56. With the bolt 26 engaging a locking notch _gg43, both drawers are locked and cannot be removed from the enclosure without releasing the locking bolt 26 from the locking bar 47.