US2736185A

US2736185A - Sliding door lock assembly

Info

Publication number: US2736185A
Authority: US
Publication date: 1956-02-28
Anticipated expiration: 1973-02-28

Description

Feb. 28, 1956 F. R.' 'COLLAR SLIDING DOOR LOCK ASSEMBLY Filed June 15. 1953 United States Patent O SLIDING DOOR LOCK ASSEMBLY Frank R. Collar, Los Angeles, Calif., assignor to Adams Rite Manufacturing Company, Glendale, Calif., a corporation of California Application June 15, 1953, Serial No. 361,721

7 Claims. (Cl. 70-100) My invention relates in general to locks of the type employed on sliding doors and relates in particular to a door lock having a swingably mounted lock lever which moves into locking position with a hook action.

It is an object of the invention to provide'a simple yet strong door lock which has means for preventing movement of the locking lever into projecting locking position unless the door with which the lock is associated is closed. This feature of the invention is regarded as being especially valuable since it prevents the inadvertent operation of the locking lever into extended position when the door is in open position with the result that if the door were then moved toward closed position the projecting locking lever would strike the lock plate mounted in the door frame.

It is an object of the invention to provide a lock of the character set forth in the preceding paragraph having a locking part for preventing extension of the locking lever, and a pin member projecting from the lock structure so as to be depressed when the door is closed, thereby releasing the locking parts which prevent operation of the locking lever, whereupon the lock may be actuated to swing the locking lever into extended locking position.

A further object of the invention is to provide in this lock mechanism a simple means of adjustment whereby the extension of the locking lever, when it is in locking position, may be adjusted so that the hook element of the locking lever will be then arranged for a cooperation with the lock plate mounted in the door frame.

It is a further object of the invention to provide a simple lockv construction having an operating crank with an extended lever portion connected by a link to the swingable locking lever, whereby rotation of the operating crank will swing the locking lever into locking position and positively hold the locking lever inL such position, so that the locking lever cannot be moved into retracted position by force externally applied thereto.

A further object of the invention is to pivotally mount the locking lever on a swingable support arranged to be swung forwardly and rearwardly by operation of an adjusting screw, thereby providing adjustment of the extension ofthe locking lever from the housing or supporting member of the lock device.

Further objects and advantages ofthe invention may be brought out in the following part of the specification wherein I have described a preferred embodiment ofthe invention in considerable detail so asl to enable others to easily understand the invention, without limiting to details the invention which has the scopeA defined by the accompanying claims.

Referring to the drawings which are for illustrative purposes only:

Fig. l is a fragmentary elevational view showing a preferred embodiment of my invention mounted in the edge of a door and engaging a locking plate mounted in a door frame;

Fig. 2 is a view showing the lock device of Fig. 1 with one of the plates thereof removed soV as to disclose the internal lock mechanism;

ICC

Fig. 3 is a view similar to Fig. 2, but showing the locking lever in retracted position;

Fig. 4 is sectional view taken as indicated by the line 4--4 of Fig. 3;

Fig. 5 is a perspective view of the plate for locking the operating crank of the lock mechanism;

Fig. 6 is a sectional View taken as indicated by lin'e16-6 in Fig. 3.

In Fig. 1, I show a lock mechanism 10 mounted in a recess 1.1 in the front edge of a door 12. The door 12 is shown in closed position, that is, with the edge thereof abutting the edge of a door frame member 13 to which a locking plate 1'4 is secured by screws 15. The locking plate 14 has therein an opening 16 through which the outer, hook end 17 of a locking lever I8 may pass. In Fig. l the' locking lever 18 is shown in locking position with the hook end 17' thereof extending down across the inner face 20 of the locking plate 14 adjacent the lower end of the opening 16.

The lock mechanism 10 comprises a housing or supporting member 21 consisting essentially of a front plate 2'2 and a back plate 23. In Figs. 2 and 3 the front plate has been removed to show the mechanism of the Vlock structure. The back plate 23 has at the lateral edges thereof forwardly extending flanges to form inner and

outer edge walls

24 and 25 for the supporting member 21. The width of the front plate 22 is such that it will lie between the front edges 26 of the

walls

24 and 25.

Posts

27 and 28 are mounted respectively near the upper and lower ends of the back plate 23 and project forwardly toward the front plate 22. The front ends of the

posts

27 and 28 have circular openings 29 to receive screws 3`0` which pass through the front plate 22 and secure such front plate 22 against the front ends of the

posts

27 and 28. As

shown irr Figs. l and 4, the front and

back plates

22 and 23 have near the upper lefthand portion thereof circular openings 29' and 30' which' receive the reduced ends 31 formed on the hub 32 of an operating crank 33 having a lever portion 34 which extends horizontally and rightwardly when thelocking lever 18 is in retracted position as s hownfinV Fig. 3. The operating crank 33 has in its hub 32 a slot 35 adapted to be engaged for the purpose of rotating the operating crank 33 between the positions thereof shown in Figs. 2 and 3'.

The lever 34 of the operating crank' 33l has on the end thereof a projection 36, Fig. 4, extending rearwardly toward the back plate 23. The lever 34 also has thereon a forwardly projecting pin 37 which is received in an opening 38 in the upper end of a flat link 39`which has the function of transmittingmotion' from the operating crank 33 to the locking lever 18. The lower end of the link 39 engages a pin 40 which projects forwardly from the locking lever 18.

The inner end of the locking lever 18` is mounted on a lock pivot pin 41 carried' by a movable member 42 arranged to be adjusted toward and away from the edge wall 25, thereby providing means for adjusting the locking lever 18 in its locking position. The movable member 42` is a swingable support for thepivot pin 41. It has an opening 43, Fig. 6, through which the lower post 28 extends. The lower end 44 of the member 42, below the post-28 carries a nut 45 which is threaded on a screw 46. The rightward end of the screw 46 has a head 47, a portion of which projects vwithin an opening 48 in the lower portion of the wall 25. The leftward end of the screw- 46 engages the wall 24' and rightward movement of the screw is limited by a pin 49 which is passed through a transverse opening in the screw head 47 after the screw is passed through the opening 48. By rotation of the screw 46, the nut 45 may be shifted, causing the swingable support 42 to swingon the post 28, thereby chang- ,ing the position of the pivot pin` 41. In'Fig. 2 the pivot pin 41 is shown in its extreme leftward or retracted position so that the minimum space S exists between the hook end 17 of the locking lever 18 and the wall 25. The width of the space S may be increased by rotating the screw 46 so as to move the nut 45 leftwardly, thereby swinging the support 42 in clockwise direction and shifting the pivot 41 and the locking lever 18 rightwardly from the retracted position in which these parts are shown.

The invention provides means for locking the locking lever 18 in the retracted position in which it is shown in Fig. 3, so that this locking lever 18 cannot be inadvertently swung from the retracted position in which it is shown in Fig. 3 to the extended position in which it is shown in Fig. 2, while the door is open. The advantage of this arrangement is avoidance of injury to the lock mechanism or to the lock plate 14 by attempting to close the door with the locking lever 18 in extended position as shown in Fig. 2. A locking plate 50 is provided having a shoulder 52 resiliently held in a position to engage the projection 36 of the crank lever 34 when the operating crank 33 is swung upwardly from the position in which it is shown in Fig. 2 to the position in which it is shown in Fig. 3 to retract the locking lever 18. A spring 53 urges the locking plate 50 into the position in which it is shown in Fig. 2. Approaching the shoulder 52, the locking plate 50 is provided with a curved sloping edge 54 which is engaged by the projection 36 as the lever 34 is swung rightwardly and upwardly from the position in which it is shown in Fig. 2, the pressure of the projection 36 against the approaching edge 54, forcing the locking plate 50 leftwardly against the action of the spring 53 until the projection 36 has moved into a position above the shoulder 52, whereupon the spring 53 will move the locking plate 50 back to its original position as shown in Figs. 2 and 3.

The locking plate 50 is formed from a simple stamping as shown in Fig. 5. It has a pair of parallel legs 55 arranged to engage the upper and lower faces of the hub 32 so as to be guided thereby. Along the upper edge Yof the plate 50 there is a laterally bent portion 56 having on the front or rightward portion thereof a projection 57 which extends out through an opening 58 in the upper portion of the wall as shown in Fig. 2. The portion 56 also has thereon a stem 59 to support the spring 53.

When the door 12, Fig. 1, is closed the projection 57 engages and is pressed inwardly by the upper portion of the plate 14, thereby moving the locking plate 50 leftwardly from the position in which it is shown in Figs. 2 and 3, with the result that as long as the door 12 is closed, the holding of the projection 57 in retracted position as shown in Fig. 1 will effect holding of the locking plate 50 in retracted position. Therefore, at this time it is possible to rotate the operating crank 33 from the position in which it is shown in Fig. 3 to the position thereof shown in Fig. 2, making it possible to swgig tllie locking lever 18 into locking position as shown in 1g.

A further feature of the lock mechanism is that its locking member 18 cannot be swung from the extended position in which it is shown in Fig. l by externally applied pressure to the retracted position in which it 1s shown in Fig. 3. A spring 60, mounted on the forwardly extending portion of the post 28 has its upper end 1 n engagement with the link 39 and constantly urges the link 39 leftwardly. The crank lever 34 and the link 39 are arranged as a toggle which is extended when the lever 34 1s swung down into the position in Which it is shown in Fig. 2 to extend the locking lever 18. At this time. the pin 37 is disposed slightly to the left of a line passing through the center of the hub 32 and the center of the pm 40, while at the same time the spring 60 urges the upper end of the link 39 leftwardly to prevent any POSSlbllliY of the crank 33 being rotated in counterclockwise direction from the position in which it is shown in Fig. 2 by upward force applied to the portion of the locking lever 18 which extends rightwardly from the face of the wall 25.

I claim:

l. In a door lock: a supporting member arranged to be secured to a door element, said supporting member having front and rear spaced plates; an operating crank carried by said supporting member, comprising a hub with end portions set in openings in said spaced plates, and a lever portion with a projecting pin and a locking proj ection thereon spaced from said hub; a swingable support having one end thereof pivotally connected to said sup porting member; a pivot pin on said swingable support; a locking lever swingable on said pivot pin from retracted position to a position extending from said supporting member; an adjusting screw in said supporting member; a nut on said adjusting screw connected to said swingable support so that movement of said nut by rotation of said adjusting screw will effect a swinging of said swingable' support and change the position of said locking lever in its extended position; a link connecting said pin of said' operating crank with a portion of said locking lever to swing said locking lever between retracted and extended positions in response to swinging of said operating crank between rst and second positions thereof; a locking plate having a part projecting from said supporting member in such position that it will project from the edge of said door element, said locking plate being movable from ex-f tended to retracted position and having a shoulder oper-r ating when said locking plate is in extended position to engage said projection when said crank is in said first position thereof to prevent rotation of said operating crankl from said rst to said second position thereof; and springi means urging said locking plate into said extended position thereof and permitting movement thereof into retracted position by pressure applied to said projecting part.

2. In a door lock: a supporting member arranged to be secured to a door element; an operating crank carried by said supporting member so as to be swingable between first and second positions; a swingable support having one end thereof pivotally connected to said supporting member; a pivot pin on said swingable support; a locking lever swingable on said pivot pin from retracted position to a position extending from said supporting member; an adjusting screw in said supporting member; a nut on said adjusting screw connected to said swingable support so that movement of said nut by rotation of said adjusting screw will eiect a swinging of said swingable support and change the position of said locking lever in its extended position; a link connecting said operating crank with a portion of said locking lever to swing said locking lever between retracted and extended positions in response to swinging of said operating crank between rst and second positions thereof; a locking plate having a part projecting from said supporting member in such position that it will project from the edge of said door element, said locking plate being movable from extended to retracted position and having a shoulder operating when said locking plate is in extended position to engage said crank when it is in said rst position thereof to prevent rotation of said operating crank from said first to said second position thereof; and spring means urging said locking plate into said extended position thereof and permitting movement thereof into retracted position by pressure applied to said projecting part.

3. In a door lock: a supporting member arranged to be secured to a door element, said supporting member having front and rear spaced plates; an operating crank carried by said supporting member, comprising a hub with end portions set in openings in said spaced plates, and a lever portion with a projecting pin and a locking projection thereon spaced from said hub; a pivot pin on said 'supporting member; a locking lever swingable on pivot pin from retracted position to a position extending from said supporting member; a link connecting said pin of said operating crank with a portion of said locking lever to swing said locking lever between retracted and extended positions in response to swinging of said operating crank between first and second positions thereof; a locking plate having a part projecting from said supporting member in such position that it will project from the edge of said door element, said locking plate being movable from extended to retracted position and having a shoulder operating when said locking plate is in extended position to engage said projection when said crank is in said first position thereof to prevent rotation of said operating crank from said first to said second position thereof; and spring means urging said locking plate into said extended position thereof and permitting movement thereof into retracted position by pressure applied to said projecting part.

4. In a door lock: a supporting member arranged to be secured to a door element; an operating crank carried by said supporting member so as to be swingable between iirst and second positions; a pivot pin on said supporting member; a locking lever swingable on said pivot pin from retracted postion to a position extending from said supporting member; a link connecting said operating crank with a portion of said locking lever to swing said locking lever between retracted and extended positions in response to swinging of said operating crank between first and second positions thereof; a locking plate having a part projecting from said supporting member in such position that it will project from the edge of said door element, said locking plate being movable from extended to retracted position and having a shoulder operating when said locking plate is in extended position to engage said crank when it is in said first position thereof to prevent rotation of said operating crank from said first to said second position thereof; and spring means urging said locking plate into said extended position thereof and premittng movement thereof into retracted position by pressure applied to said projecting part.

5. In a door lock: a supporting member arranged to be secured to a door element, said supporting member having front and rear spaced plates; an operating crank carried by said supporting member, comprising a hub with end portions set in openings in said spaced plates, and a lever portion with a projecting pin and a locking projection thereon spaced from said hub; a swingable support having one end thereof pivotally connected to said supporting member; a pivot pin on said swingable support; a locking lever swingable 0n said pivot pin from retracted position to a position extending from said supporting member; an adjusting screw in said supporting member; a nut on said adjusting screw connected to said swingable support so that movement of said nut by rotation of said adjusting screw will effect a swinging of said swingable support and change the position of said locking lever in its extended position; and a link connecting said pin of said operating crank with a portion of said locking lever to swing said locking lever between retracted and extended positions in response to swinging of said operating crank between first and second positions thereof.

6. In a door lock: a supporting member arranged to be secured to a door element; an operating crank carried by said supporting member so as to be swingable between rst and second positions; a swingable support having one end thereof pivotally connected to said supporting member; a pivot pin on said swingable support; a locking lever swingable on said pivot pin from retracted position to a position extending from said supporting member; an adjusting screw in said supporting member; a nut on said adjusting screw connected to said swingable support so that movement of said nut by rotation of said adjusting screw will effect a swinging of said swingable support and change the position of said locking lever in its extended position; and a link connecting said operating crank with a portion of said locking lever to swing said locking lever between retracted and extending positions in response to swinging of said operating crank between iirst and second positions thereof.

7. In a door lock: a supporting member arranged to be secured to a door element; an operating crank carried by said supporting member so as to be swingable between first and second positions; a movable support; a pivot pin on said movable support; a locking lever swingable on said pivot pin from retracted position to a position extending from said supporting member; an adjusting screw in said supporting member; a nut on said adjusting screw connected to said movable support so that movement of said nut by said screw will effect movement of said movable support and change the position of said locking lever in its extended position; and a link connecting said operating crank with a portion of said locking lever to swing said locking lever between retracted and extending positions in response to swinging of said operating crank between iirst and second positions thereof.

References Cited in the iile of this patent UNITED STATES PATENTS 452,738 Van Winkle May 19, 1891 667,023 Larsen Ian. 29, 1901 1,090,305 Hoffman Mar. 17, 1914 1,420,215 Pike June 20, 1922 1,528,515 Taylor Mar. 3, 1925 1,937,978 Miller Dec. 5, 1933 2,469,113 Hooker May 3, 1949 FOREIGN PATENTS 17,895 Great Britain Aug. 2, 1912 316,567 Great Britain July 18, 1929 622,197 Germany Nov. 22, 1935