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Publication numberUS2511253 A
Publication typeGrant
Publication dateJun 13, 1950
Filing dateFeb 20, 1947
Priority dateFeb 20, 1947
Publication numberUS 2511253 A, US 2511253A, US-A-2511253, US2511253 A, US2511253A
InventorsFischer Carl W
Original AssigneePowers Regulator Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Locking mechanism for cabinets, instrument cases, and the like
US 2511253 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

June 13, 1950 c. w. FISCHER LOCKING MECHANISM FOR CABINETS, INSTRUMENT CASES, AND THE LIKE Filed Feb. 20, 1947- INVENTOR. QZI'ZWfAfC/Z BY 7% y W Patented June 13, 1950 LOCKING.MECHANISM. FOR CABINETS, INSTRUMENT CASES, AND, THE LIKE Carl W. Fischer, Chicago, 11]., assignorto The.

Powers Regulator Company, Chicago, 111,, a cor-,

porati nof l nois Application February 20, 19417, SerialNo. 729,786

fi-Clairns. 1

This invention pertains to locking mechanism for cabinets, instrument cases and the like.

An object of the invention is to provide a looking mechanism which is particularly suited for cabinets and the like.

Another object is to provide a lock which does not have any exterior protrusionswhen the door is locked.

A further object is to provide a lock which is relatively inconspicuous when viewed from the outside of the door.

Another object is to. provide a locking mechanism wherein the latch is positively held in latched position as distinguished from the usual type wherein the latching position is maintained by a spring.

A further object is to provide a locking mechanism having a cam action which has suflicient mechanical advantage between the lock and cam to compress a door gasket tightly.

Another object is to provide a locking mechanism which is readily adaptable to compensate for door gaskets of varying. thickness.

A further object is toprovidea locking mechanism wherein the movement of the latch from. locked to unlocked position is spring actuated.

With these and various other objects in view, the invention may consistof certain novel. fea-.. tures of construction and operation, as willbe more fullydescribed and particularly pointed outin the specification, drawing and claims appended hereto.

In the drawings, which illustrate an embodiment of the device and wherein like. reference characters are used to designate likeparts:

Figure 1 is a frontelevation of a locking mechanism embodying the invention, asviewed from the outside-of a door in lockedposition. T-heportions of the device positioned behind thedoor are. shown in broken lines;

Figure 2 is a side elevation, partially incrossv section, of the devicein locked-position;

Figure 3 is a rear elevation of the lockingmechanism in lockedpositionthesame looking toward the left as viewed in Figure 2; and;

Figure 4 is. a transverse sectional elevation of the the plungerand slide-pin taken through the disclosed in Jacobi Patent No. 2,086,034, issued July-6, 1937. When a key isinserted-inthe key hole l8, and turned "teunlock theunit, thehead" 2. or push. button 20:. may then. be pushed inwardly causing thebolt or pivotedpin engaging member- 22. to move upwardly to. engage slide or locking pin 24;

Theplunger 26 is mounted adjacent-and above the lock unit and is provided with. a push button. head 28. The housing 29 0f. the locking unitand the housing 3i: of the plunger may be in-. tegrally formed or otherwise securedv adjacent each other inthe.relationshipshown inthe drawings, or they may beseparately mounted. in the door. The slide pin 24 is mountedin the plunger 26 adjacent the inside. end. thereof. The plunger 26 is provided-witha chamber 21 in which is. mounted thecoil spring-.30, one end of: which is. secured to the stop engaging; slide pin- 2.4 by

the. set screw 32; the. end. of the spring being inserted in a, longitudinal slot-33 inthe-pin, and: the set screw holding it againsttheend; of the slot. The, other end of: the spring is seated against-theside of Chamber 21: The spring 30.. urges the pin 240utward1y of the plunger and toward, the. bolt 22, The plunger housing 3;! is provided with a longitudinal channel 3,4 for ac commodating the outer end oflthe pin 2!! when it, is sliding between, locking and: unlocking positions. On either side of: the channel, 34; at the endof" the housing are'lugs 36 whichkeep the. pin 24; in alignment with channel; 34 when the. latter is. extended from the plungen inlocked position as shown in Figure 2 in which position the pin 24 engages the inner end of housing 3.!- between lugs 36; which pin engaging surface forms stop 31.

The upper-side of the plunger housing- 31-. is,

provided with a, longitudinal. s10 t;.38, for receiving the screw 32 when the. plunges-26. is moving toward the left as viewed in Figurez. The springplunger, thereby urging the latter outwardly towardunlocked position. The inner endofthe plunger is provided with an adjustingscrew 4 3i A. latching. lever 46 ismivotally securedtothe door. frame-at; The upper endgof the lever curved=d0wnwardly to hookover the pinor keeper. 5!] when themeohanism is in locked: position, thepin engaging surfacethereof having a cam face 58. The pin 501is-secured to thedoor andis in the same.- horizontal plane. as the pivot;

screw, 48: A tension. spring 52' has. one end: hooked to the upper end of thelever Mizand the other end is attached to the pin 54 on the door frame [4. The spring tends to lift the upper end of the lever 46 upwardly, urging it into unlatched position. A stop pin 56 on the door frame limits the upward movement of the upper end of the lever.

In operation, to open the door l2 which pivots on hinges not shown, a key is inserted in the key hole [8 and turned to unlocked position. The push button head 20 of the lock unit I6 is then pushed inwardly, which causes the bolt 22 to move upwardly, engaging the slide pin 24 and moving it upwardly into the plunger 26, so that it disengages the stop 31 at the end of casing 3i and compresses spring 30. When the end of slide pin 24 has been pushed inwardly beyond the end of the casing, it will be in a position to enter the channel 34. The plunger is then free to be moved outwardly by the lower end of the latching lever 46. The upper end of lever 46 is pulled upwardly by spring 52, thereby moving the cammed face 58 of the lever from in front of the pin 50. At the same time the lower end of the lever which engages the adjusting screw 44 pushes the plunger 26 outwardly until the slide pin 24 reaches the end of channel 34, which acts as a stop. The movement of the lever 46 is limited by the upper end engaging the stop pin 56. The pressure of the lower end of the lever against the plunger will impart an opening impetus to the door after the upper end 58 has moved from in front of the pin 50.

To close and lock the door l2, pressure is placed on the push button head 28 of the plunger 29 to move the door toward closed position. The pressure of spring 40 against the plunger tending to hold it outwardly in unlocked position is sufficient so that the door may be moved to a closed position without appreciably moving the plunger inwardly. Continued pressure on push button 28 after the door has reached closed position, moves the plunger inwardly and the adjusting screw 44 engages the lower end of lever 46, and causes the upper hooked end 56 to move into locking engagement with pin 50 as shown in Figure 2. Slide pin 24 moves to the end of channel 34 and then is pushed outwardly by spring 30. The pin 24 is then in engagement with stop 3'! at the end of housing 3| which acts to prevent the plunger 26 from being moved outwardly.

As previously pointed out the pivot point 48 of the lever 46 is in the same horizontal plane as the pin 50 with the result that there is an even distribution of the pull between the parts. This is particularly important where there is a gasket or sealing element between the door and frame as there is considerable leverage exerted to compress the gasket when the plunger is pushed inwardly against the lower end of lever 46. The camming action of the under face 58 of the hooked portion of the upper end of lever 46 on the pin 50 draws the door tightly closed. The adjusting screw 44 may be screwed inwardly to shorten the overall length of the plunger 26, consequently the lower end of lever 46 will not be moved as much when the plunger is in locked position and the cam face 58 of the upper end of the lever will not be moved as far down against pin 58, thereby lessening the pressure of the door against the gasket. Where the gasket has become worn, or to compensate for differences in sizes of gaskets, the adjusting screw 44 may be screwed outwardly with the result that the downward movement of the cam face 58 against pin 50 will be increased.

While the lock unit I6 is described as being key operated it is obvious that a push button unit which does not require a key could be used in place of the key operated unit.

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown, which is merely by way of illustration and not limitation, as various and other forms of the device will, of course, be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim:

1. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame and adapted to engage said keeper on said closure, resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with said latching member for moving the latching member to latched position, means for locking said latching member in said latched position, said third named means including releasable means carried by said second named means and engageable with the end of said housing to hold said second named means in locking relation to said latching member, resilient means urging said second named means toward unlatched position, and means carried by said closure and actuatable from the exterior thereof and engageable with said releasable means for disengaging the same from the end of the housing, whereby said last named resilient means actuates said second named means to unlatched position and said first named resilient means actuates said latching member to unlatched position.

2. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame having one leg provided with a locking cam adapted to engage said keeper, and another leg being adapted to be moved to move said first named leg, resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with the second named leg of said latching member for moving the latching member to latched position,

. said second named means including a plunger slidably mounted in said housing and having one end engageable with the second named leg of said latching member, a locking pin provided on said plunger engageable with said housing to maintain said plunger in latched position, resilient means urging said pin toward latched position, resilient means urging said plunger toward unlatched position, and a bolt carried by said closure and actuatable from the exterior thereof for moving said pin to inoperative position whereby said last named resilient means actuates said plunger to inoperative position and said first named resilient means actuates said latching member to unlatched position.

3. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame having one leg provided with a locking cam adapted to engage said keeper, and another leg being adapted to be moved to move said first named le resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with the second named leg of said latching member for moving the latching member to latched position, said second named means including a plunger slidably mounted in said housing and having one end engageable with the second named leg of said latching member, a locking pin provided on said plunger engageable with said housing to maintain said plunger in latched position, resilient means urging said pin toward latched position, resilient means urging said plunger toward unlatched position, and a bolt carried by said closure and actuatable from the exterior thereof for moving said pin to inoperative position whereby said last named resilient means actuates said plunger to inoperative position and said first named resilient means actuates said latching member to unlatched position, said housing having a portion for receiving said pin when said plunger is in inoperative position and for maintaining said pin in inoperative position.

4. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame having one leg provided with a locking cam adapted to engage said keeper, and another leg being adapted to be moved to move said first named leg, resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with the second named leg of said latching member for moving the latching member to latched position, said second named means including a plunger slidably mounted in said housing and having one end engageable with the second named leg of said latching member, a locking pin between said plunger and housing to maintain said plunger in latched position, resilient means urging said pin toward latched position, resilient means urging said plunger toward unlatched position, and a bolt carried by said closure and actuatable from the exterior thereof for moving said pin to inoperative position whereby said last named resilient means actuates said plunger t inoperative position and said first named resilient mean actuates said latching member to unlatched position.

5. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame and adapted to engage said keeper on said closure, resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with said latching member for moving the latching member to latched position, means for locking said latching member in said latched position, said third named means including releasable means carried by said second named means and engageable with the end of said housing to hold said second named means in locking relation to said latching member, resilient means urging said second named means toward unlatched position, and means carried by said closure and actuatable from the exterior thereof and engageable with said releasable means for disengaging the same from the end of the housing, whereby said last named resilient means actuates said second named means to unlatched position and said first named resilient means actuates said latching member to unlatched position, said housing having a portion for receiving said pin when said plunger is in inoperative position and for maintaining said pin in inoperative position.

6. In combination with a closure and frame therefor, a keeper on said closure, locking mechanism for the closure comprising a latching member pivotally mounted on said frame and adapted to engage said keeper on said closure, resilient means biasing said latching member toward unlatched position, a housing mounted on said closure having an opening leading to the exterior thereof, means slidably extending through said opening and housing and interengaging with said latching member for moving the latching member to latched position, means for lockin said latching member in said latched position, said third named means including releasable means between said second named means and housing movable to hold said second named means in locking relation to said latching member, resilient means urging said second named means toward unlatched position, and means carried by said closure and actuatable from the exterior thereof and engageable with said releasable means for moving the same to inoperative position whereby said last named resilient means actuates said second named means to unlatched position and said first named resilient means actuates said latching member to unlatched position.

CARL W. FISCHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 613,356 Conerly Nov. 1, 1898 938,114 Boettcher Oct. 26, 1909 1,302,063 Malone Apr. 29, 1919 1,864,956 Stone June 28, 1932' 2,083,963 Ruggiero June 15, 1937 2,156,004 Vanderlinde Apr. 25, 1939 2,218,183 Springer Oct. 15, 1940

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US613356 *Dec 16, 1897Nov 1, 1898 Door-stop
US938114 *Mar 10, 1909Oct 26, 1909William BoettcherDoor-stop.
US1302063 *Aug 6, 1915Apr 29, 1919John J MaloneDoor-latch.
US1864956 *May 15, 1931Jun 28, 1932Harry S StoneFastening means for bags and the like
US2083963 *Jan 18, 1934Jun 15, 1937Salvator F RuggieroAutomobile hood latch mechanism
US2156004 *Mar 29, 1938Apr 25, 1939Edward I VanderlindeLatch mechanism and operating means therefor
US2218183 *Feb 14, 1938Oct 15, 1940Ray W SpringerDoor locking mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3429153 *Sep 20, 1967Feb 25, 1969Gen Motors CorpVehicle body compartment latch and lock
US3581532 *Apr 30, 1969Jun 1, 1971Gen Motors CorpClosure latch
US4135375 *May 25, 1977Jan 23, 1979Voegeli Ronald CLocking mechanism for cabinet enclosure
US4912951 *Feb 1, 1989Apr 3, 1990The Eastern CompanySliding door lock
US5018373 *Apr 2, 1990May 28, 1991The Eastern CompanySliding door lock
Classifications
U.S. Classification292/129, 70/78
International ClassificationE05C3/00, E05C3/30
Cooperative ClassificationE05C3/30
European ClassificationE05C3/30