US1880636A - Door latch - Google Patents

Description

D. w. woob Oct. 4, 1932.

DOOR LATCH Filed May 26, 1931 '2 Sheets-Sheet M m m A J WITNESSES Oct. 4, 1932. w w 1,880,636

DOOR LATCH Filed May 26. 1931 2 Sheets-Sheet 2 INVENTOR ,U WZlivooZ,

a 5 7 ATTOR N EYS v Patented Oct. 4, 1932 r OFFICE DAVID w. wool), or BRAZIL, INDIANA DOOR LATCH Application filed May 26, 1931. Serial No. 540,112.

The invention relates to a device for latching or bolting all kinds of doors and which 1s designed and adapted to be used advantage- I ously in conjunctlon with the doors ofauto V and V. the outside tions, construction tion being taken on 35 mobiles.

An object of the invention is the provision of a device of the indicated character whose bolt may be operated both from the inside outside of the door to which the device is applied, with the further provision that the bolt may be controlled from the insideof the door so that the bolt cannot be operated from the outside of the door. I

A further object of the invention is the provision of improvements in a device of the indicated character whereby the bolt is released from its retracted position for movement into its latching position in response to tion.

. V: the movement of the door to its closed posi- 20 A further objeottof the invention is the provision of improvements in a door latch whereby its latch bolt cannot be moved to its retracted position from the outside of the door when the bolt is partly in its latching position. I

With the foregoing and other objects in view the invention resides in the combinaand operation of the parts hereinafter fully described and illustrated in the accompanying drawings, in which 7 Figure 1 is avertical section shOWing the device applied to a door and its jamb, the secthe line 11 of Figure 2;

Figure 2 is a longitudinal section on the line 22 of Figure 1; A I

Figure 3 is a side view of the latch with its bolt in the latching or bolting position and handle checked from retracting the bolt; I

Figure A is a view similar to Figure 3 but showing the bolt in its partly projected position; t

Figure 5 is a fragmentary section illustrating the check for releasably retaining the bolt in its retracted position;

Figure 6 is a section on the line 6-6 of Figure 5; I

Figure 7 is a vertical section of the keeper.

In the drawings there has been shown, by

way of example, an automobile door 10 and its jamb' 11 forming part of the automobile body, and it being understood that the door 10 swings on a vertical axis. The device of the present invention consists sembly, sembly being carried by thedoor 10 and the keeper assembly being arranged on the j amb 11. The door has a space or recess to receive the latch assembly. I I

The latch assembly includes a plate 12 whichis secured in place within the recess in the door 10 by suitable fastening elements 13. The plate 12 has a vertical end flange 14, and also has bearing blocks 15 and 16 which may be secured thereto or formed integral therewith,;the blocks 15' and 16, in the present instance, being secured to the plate by fastening elements 17 and 18, respectively. A latch bolt 19, is mounted for sliding movement between the blocks 15 and 16 to retracted and also latching or bolting positions. The bolt 19 is under the influence of an expansion spring 20 which has one'end in engagement witha lateral lug 21 on the plate 12, and its opposite end being disposed in a bore in the bolt 19 and in contact therewith, to move the bolt to latching orbolting position. A handle lever 22 is supported by the block 16 and extends through the door to the outside thereof and is therefore to be known as the outside handle lever. This lever 22 has rocking or pivotal movement andcooperates with a lateral projection or pin 28 on the bolt 19 for the purpose of retracting the bolt. A handle lever 24 is mounted on the plate ,12 and projects upwardly through an opening in the top of the door 10, and is to be known as the inside handle lever. This handle lever 24 cooperates with an upstanding lug, 'pin or projection 25 on the inner end of the bolt 19 to move the bolt to its retracted position.

n order to retain the bolt 19 in its retracted position and also to automatically release the bolt to its latching or bolting position as the door 10 is moved into its closed position there is provided means presently to be described. A latch member, check or dog 26 is arranged in a vertical bore in the block 15 directly over the bolt 19, and is under the of a latohasand a keeper assembly, the latch as influence of an expansion spring 27 arranged betweenthe dog 26 and the block 15. An

actuator 28 is arranged in a horizontal bore in the block for cooperation with'the dog.

26. The dog 26 and actuator 28 are disposed at right angles with respect to each other and are slidable with respect to each other. The dog and actuator 28 have contacting mitered faces which produce a cainming action so that when the actuator 28 is moved inwardly it will cause thedog 26 to move upwardly against the action of the spring 27, and when the dog 26 is free to move downwardly,

28 is limited in its outward movement by .a stop 29 carried by the block 15, which stop enters a groove in the actuator to he engaged by the shoulders 30 formed by the groove; The bolt 19 has a notch or recess 31 in the upper surface thereof to receive the lower end of the dog 26 when the bolt 19 is withdrawn or moved into its retracted'position, as shown in Figure 4. It will be understood that actuator 28 keeps the dog 26in its up position until the bolt is in its retracted posi orv bolting position.

'The bolt 19 in its latching or bolting position is received in a recess 33 in the jainb 11. A keeper abutment 34 is arranged in the recess 33. This abutment 34 is rockably mounted by reason of the semi-globular member 35 received ona seat of an attachment 36 secured as at 37 to thejanib 11, and said'abutment is also yieldaloly supportedby reason of a spring 38 surrounding aste-m 39 on the member 35, the spring being disposed in contact with the attachment 36 and a collar 40 on the stem 39. The keeper abutment 34 is engaged by the bolt 19 and by reason of the fact that it may have rocking movement and the further factthat it is 'yieldable, any slight dis-placement of the bolt 19 will be compensated, thereby always maintaining a firm-engagementof the bolt 19 with the abutment 34. lnthislmanner vibration andrattling will be eliminated.

In order to prevent the bolt 19 being moved to its retracted position, when the bolt is in its full latching or boltingposition or partly in such position, by the outside handle lever 22, there is provided means presently to be described. A detent: or dog 41 is pivotally mounted as at 42 on the-block 1'5 and has a tail 43 on one end which is acted on by a downthrow cam 44 on the lower end. of the the actuator 28 will be moved out; wardly to a projected position. "The actuator dog 26 and releasing handle lever 24. The detent or dog 41 is under the influence of a spring 45 which constantly acts on the detent or dog to move the end 46 thereof in a down position in the path of the arm 47 of the lever 22, as shown in Figure 3.. When the lever 24 is moved to a substantially vertical position, thecam 44 bearing on the tail 43 of the dog 41 will hold the latter in a position inwhich the end 46 thereof will be clear of the arm 47 thereby makingit possible for a person to operate the outside handle lever 22 to move the bolt 19 to its retracted position, for the purpose of opening the door 10. It will also be ap parent that theinsi-dexhandle lever 24 may be moved in the direction indicated by the arrow in Fig. 1 to move the bolt 19 to its retracted position .by reason or the .coac-tion of the lever 24 with the projection 25. As the bolt 19 'is moved into its retracted position by .operating either the lever 22 or the lever 24, the dog 26 will engage the bolt 19 .by entering the recess 31 and thus releasably retain the bolt 19 in its retracted position. As explained above, as the door 10 is moved into its closed position, the actuator will be .tor ced'inwardly- T by the abutment 32,'therebydisengaging the the bolt 19 .tor move-- ment by the spring 20. to its latching o1; bolting position in engagement with the A keeper abutment. 34. 7

Attention is now called to the fact thatfthe detent or dog 41 has teeth 48 either of which may be engaged by the upper end of the arm 47 when the dog is in its down position, to prevent the outside handle lever 22 from being operated to move the bolt 19 to a retracted position when the bolt is partly in a latching or Jbolting position iior any reason.

It is to be observed that as the bolt 19 moves to its latching or bolting position, the pin 23 acting on the arm 47 will .move the outside handle lever 22 to its normal position, or partly into this position should the bolt 19 only movepartly to its latching or bolting position as shown in Figure 4. It will be apparent that the outside handle lever 22eannot be operated to move the bolt 19 to its retracted position because the arm 47 is in engagement with one of the teeth 48 ofthe dog 41. When the lever 24 is. in-a partly retracted position to move the dog41 to a position to prevent the operation of the outside handle lever 22, the tail 43 of the dog will be in contact with the lateral projection 49' on the lower end of the lever 24. The projection 49 serves as a fulcrum for the dog 41 causing it to move upwardly in response to the movement of the arm 47. In this connection it is to be observed that the dog 41 has a slot '50 through which the pivot 42 extends.

Safety means is provided to :prevent the dog 41 from being set in position by the cam 44 of the lever 24 in .a-position to prevent the movement of the outside handle lever V 22 1 when the bolt 19 is in its retracted position. The said means consists of a laterally projecting pin 51 on the lower end of the lever 24, and an upwardly projecting pin 52 on the bolt 19. On reference to Figure 1 it will be seen that the bolt 19 is shown in its retracted position in dotted lines and that the pin 52 will be encountered by the pin 51, thereby preventing movement of the lever 24 to the left. In this manner it will be im possible for a person to move the dog 11 to a latching position in relation to the arm 47 by moving the lever 24. It will therefore be understood that the door will not be unintentionally latched against being opened from the outside with the handle lever 22. The lever 24 is frictionally held in different positions by a spring 53.

I claim:

1. The combination with 'a door latch including a slidable latch bolt; of a device for releasably retaining said bolt in its retracted position, said device comprising a bearing in fixed relation to said bolt, a dog slidable in said bearing, a spring between the bearing and dog to move the latter to a retaining position in engagement with the bolt when the bolt is in its retracted position to retain it therein, an actuator slidable insaid hearing, said dog and actuator having contacting mitered ends whereby the dog will be disengaged from the bolt when the actuator is moved inwardly, to release the bolt for movement to its latching position, and said actuator being moved outwardly to an actuable position by the movement of the dog to its bolt engaging and retaining position.

2. In a device of the class described, the combination of a bolt movable to a retracted position and a bolting position, a bearing in fixed relation to said bolt, and cooperative members supported by said bearing for movement with respect to each other, one of said members being in the form of a dog engageable with said bolt to retain it in its retracted position, yieldable means constantly acting on said dog to urge it into its retaining position, and the other of said members being in the form of an actuator for moving said dog out of engagement with said bolt to allow the latter to be moved to its bolting position.

3. The combination with a door latch including a slidable latch bolt; of a device for combination of a movable latch bolt, means to move said bolt to its latching position and yieldable to allow the bolt to be moved to a retracted position, means including an inside handle operable to move said bolt to its retracted position; means including an outside handle operable to move said bolt to its retracted position; a spring actuated dog,

erable to move said boltto its retracted position;,means including an outside handle to move said bolt to its retracted position means adapted to be set by the second means to render the third means operable or inoperable to retract said bolt, and coacting means on the inside handle and bolt to prevent the setting of the fourth means by the movement of the inside handle when the bolt is in its retracted position, so that the thlrd means may be operated. l

I 6. In a device for latching a movable closure, the combination of a movable latch bolt, resilient means to move said bolt to a latching position, means including an inside handle operable to move said bolt to its retracted position; means including an'outside handle operable to move said bolt to its retracted position; means to retain said bolt in its retracted position and releasable by the movement of the closure into its closed position; and means operable by the movement of the inside handle to coact with the third means to prevent retraction of the bolt by the operation of theoutside handle when the closure is in its closed position.

' DAV ID W. WOOD.

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