US2333473A - Door lock - Google Patents

Description

E. D. DA LL Nov. 2, 1943.

DOOR LOCK s Sheeis-Sheetl Filed May 23, 1942 [aw/Leo .0. DALL.

,Nov.2,1943. E. D. DALL 2,333,473

DOOR LOCK Filed May 23, 1942 3 Sheets-Sheet 2 Q m AL\ Q N E. D. DALL Nov. 2, 1943.

DOOR LOCK 3 Sheets-Sheet 3 Filed May 25, 1942 Patented Nov. 2, E93

' W I r, ts

DOOR LOCK Edward D. Dali, Detroit, Miclii, assignor to Hondaille-Hershey Corporation, Detroit, Mich, a

corporation of Michigan Application May 23, 1942, Serial No. 444,161

8 Claims. (or. 292-198) position. However, due to jarring, as the vehicle is running, these camming and wedging members tend to creep along the latch bolt under pressure of the springs and to become more or less set and stuck by their frictional engagement with the latch bolt. It then requires unnecessary force on the door handle to release the cam ming and wedging members and it is therefore the object of my present invention to provide improved and more practical means cooperable with the latch bolt under control of the door handle for camming the bolt into full locking position and holding it there and which means may be readily released by the exertion of ordinary pressure upon the door handle for opening of the door.

More in-detail, an important object of the invention is to provide a take-up and holding member for the latch bolt which is free of heavy spring pressure thereagainst and whose movements for setting of the latch bolt into cocked position and for moving the bolt into locking position and holding'it there are effected by a setting member under control of the door handle.

A further object is to provide a setting member, under control of the door handle, for positively moving the latch bolt take-up and holding member into position for release of the latch bolt for opening of the door, and for camming engagement with the take-up and holding member for operating said member to move the latch bolt into its locking position for locking of the door.

A further important object is to provide keeper means cooperable with the latch bolt to hold the door in a partially open or safety position in the event that the door has not been fully closed v by slamming, or the handle has not been turned sufficiently for full closing 'of the door, or by insufiicient handle operation, the latch bolt has not been fully released for opening of the door.

My invention also embodies other features of structure, arrangement and operation, and all the various features of the invention are emextends across the edge of the door.

bodied in the structure shown on the drawings, in which drawings Figure 1 is a front or outside elevation of the lock structure on the door and the keeper structure on the door frame, with the parts in doorlocking position; Figure 2 is an elevational view looking at the structure in Figure 1 from the right;

Figure 3 is an'elevational view like Figure 1 but showing the various parts in unlocking or door-releasing position;

Figure 4 is an elevational view of the parts in Figure 3 looking from the right;

Figure 5 is an elevational view similar to Figure 4 showing the arrangement when the latch bolt has been swung out of its safety latching position;

Figure 6 is a section on plane VIVI of Figure I 1 to show the latch bolt in its full door-locking engagement with the keeper element;

Figure 7 is a view similar to Figure 6 showing the latch bolt in full released position relative to v the keeper for opening of the door; and

Figure 8 is a similar section showing the safety catch engagement of the latch bolt with the The supporting frame of the latch structure I comprises the base wall I0 to be secured to the side wall of a door, and the flange wall II which On the outer side of the flange wall, near the bottom thereof, is secured the cup-shaped frame or housing I2 for the latch bolt I3. This latch bolt is of V or angle shape and is mounted for rocking movement on the pin I4 which is secured at its ends in the outer wall of the frame I2 and the flange wall II, respectively. The bolt has the locking arm I5 and the setting arm IS, a stud Ii extending from the setting arm inwardly through the arcuate slot I8 in the flange wall I I. On the inner side of the wall II is anchored the coil spring I9 which engages the stud I'E and tends to swing the bolt to carry its locking arm I5 downwardly into the frame I2 and its setting arm I6 upwardly out of the frame, to the posithe keeper and the leg l6 of the bolt engages the incline 22 and the bolt is swung to bring its locking leg l into position behind the incline 2|, as shown on Figures 6, 7 and 8. During closing of the .door, the frame l2 rides on the bottom wall 23 of the keeper.

Mounted on the inner sideof the flange wall I above the slot i8 is a stud 24 on which the take-upwind holding member 25 for the lock bolt is fulcrumed. This take-up and holding member is in the form of a metal plate and has the recess 26, and forwardly of this recess the surface 21 which is eccentric or tapering relative to the fulcrum axis ofthe plate. When this holding member or plate i rotated to bring the recess into alignment with the arcuate slot IS, the lock bolt stud will be shifted by the spring l9 into the recess for setting of the lock bolt in its cocked position as shown on Figures 4 and 8. Upon withdrawal of the stud from the recess, and rotation of the holding member in counterclockwise direction, the eccentric or cam surface 21 on the holding member will engage the stud H for forcing the locking arm l5 of the latch bolt into its locking engagement with the keeper incline 2| (Figures 2 and 6).

The rotary movements of the take-up and holding member 25 are controlled by the setting member 28 fulcrumed on a post 29 extending forwardly from the wall I 0. Above the setting member a roll-back 30 is fulcrumed in the housing 3| on the base wall ID to be rocked by the rotation of a spindle 32 which terminates in a handle (not shown) on the outside of the door. The roll-back receives the circular upper end of a link 33 extending downwardly behind the setting member 28 and having a stud 34 thereon projecting through the arcuate slot 35 in the setting member. A coil spring 36 anchored on the fulcrum post 29 en ages the stud 34 and tends to hold the link 33 and the roll-back-in normal or upper position, while another coil spring 31 anchored on the post 29 engages the abutment 38-on the setting member 28 and tends to hold this member with the lower end of its slot 35 against the stud 34 (Figure 1).

The setting member 28 is in the form of a metal plate and at its inner end has a portion deflected forwardly to form. an abutment 39. Below this abutment the metal is deflected forwardly and laterally to provide a cam rail 43.

On the holding member 25, at a point above its fulcrum, is a pin 4| which projects into the path of the abutment and, cam rail on the setting member 28. When the setting member is rotated in counterclockwise direction (Figures 3 and 4), the abutment 39 will encounter the pin for clockwise rocking of the holding member, and when the setting member is rotated in clockwise direction (Figures 1 and 2) the cam rail 40 acts against the pin to rock the member 25 in counterclockwise direction for application of its tapering or camming surface 21 to the lock bolt stud I1 for forcing the lock bolt into its locking engagement with the keeper and to thereafter take up any looseness of the bolt so as to keep it securely held in locking position while the door is closed.

When, by the operation of the door handle, the setting member 28 is rotated in a counterclockwise direction a distance sufiicient only to rock the member 25 for reception in its recess 26 of the locking bolt stud. the lock bolt will be rocked to its cocked position by the spring l9, and the pin 4| on the member 25 will be above the upper end of the cam rail 40 of the setting member to form a stop therefor when the handle is released, the spring 3'! then holding the setting member in this position, as indicated on Figures 3 and 4. Although the locking bolt is now in position of release of its locking leg l5 from the keeper incline 2|, the door cannot be fully opened because provision is made for functioning of the locking bolt to hold the door in thi partially open or so-called safety position. Referring to Figures 6, 7 and 8, the keeper, in its upper wall and in advance of the deflection 20 has a shorter downward deflection or safety catch abutment 42 providing the inner incline 43 which forms an abutment for the end of the setting leg |6 of the bolt and prevents the full opening of the door after the incomplete operation of the door handle referred to, Before the doorcan be fully opened, the bolt must be swung to the position shown in Figure '7 with its leg i6 clear of the abutment deflection 42. This is accomplished by a full operation of the door handle. After an only partial rotation of the handle, the edge a of the member 25 in front of its recess 26 is held as shown on Figure 4 against the lock bolt stud by the force of the spring 31 acting on the setting member 28 which engages the pin 4| on the member 25, and the lock bolt is thus held independently of spring IS in its cocked position shown on Figure 8. Now when the door handle is moved to its final or full movement as shown on Figure 5, the abutment 39 on the setting member will engage the pin 4| to rock the member 25 to release its edge a from the lock bolt stud and bring its edge b at the rear of the recess 26 into engagement with lock bolt stud to rock the bolt against the force of spring l8 and beyond its cocked position to the position, shown in Figures 5 and '7, to clear the bolt arm I6 from the keeper safety catch abutment 42 so that the door may then be fully opened. When, after such complete movement of the handle and full opening of the door, the handle is released, the spring 31 will rock the setting member back for reengagement of the upper end of its cam rail 40 with the pin 4| for rocking of the member 25 back to its position shown on Figure 4' for reentry of the lock bolt stud into the recess 26 and resetting of the locking bolt to its cocked position and for holding of the bolt in this position by the spring l9 and the edge a on the holding member 25. The outer door handle may now be turned, inde ndently of movement of the setting member 2 to the extent of the slot 35 of the setting member through which the stud 34 extends from the link 33 which connects with the roll-back 30, the spring 36 tending to hold the link and the roll-back and the handle in normal position.

The door may be closed from its open position by first swinging the handle down its full distance for setting of the lock bolt to the position shown in Figures 5 and 7, and then swinging the door to its closed position while the handle s being held down, the setting leg I6 of the bolt, during the final closing movement of the door, then encountering the keeper deflection 20 so that the bolt will be rocked from its cocked position toward its locking position and its stud withdrawn from the recess 26 (Figure 5); and then,

upon release of the handle, the spring 3! will function to rotate the setting member 28 in clockwise direction for counter-clockwise rocking of the holding member 25 for engagement of its tapering surface 21 with the bolt studand final setting of the bolt into its locking position in locking engagement with the locking incline 2| on the keeper, as shown on Figures 2 and 6. Should the handle, during closing movement of the door, be released before the locking bolt has had sufficient engagement with keeper abutment to withdraw the bolt stud from the holding member recess 26, then the bolt stud, will be returned by the spring [9 into the recess 26 and the bolt will be in its'safety catch position behind the safety abutment 42 on the keeper, as shown on Figure 8. The door handle may then be turned the required full distance and the door swung completely shut, or the partially open door may be pushed shut, during which pushing operation the bolt will be rocked toward its locking position to clear its stud out of the recess 26 for release of the holding member and rocking thereby of the bolt into its final locking position as the door is being fully closed.

When the door is to be shut by slamming, and I out of the recess 26 of the holding member 25 to free the holding member for rocking thereof by the setting member for engagement with the bolt stud for rocking of the bolt into' its full locking position, If the slamming effort is not sufficient for engagement of the bolt with the keeper abutment 2B, the bolt stud will not be withdrawn from the .recess 26 of the holding member and spring I 9 will then rock the bolt back to its cooked or safety position shown on Figure 8 and the door will then be held in its partially closed position and against full opening. The locking bolt thus cooperates with the keeper to safety lock the door or to lock it in fully closed position.

Provision is also made for unlocking the door.

by operation of the inside handle usually provided on doors. Such handle i not shown on the drawings, but as is'usual, a bar 44 extends therefrom, and in the arrangement shown the bar has the pin 45 engaging in the slot 45 in the setting member 28, and when it is desired to open the door from the inside, the inside handle is rotated for pull on the bar 44 and rotation of the setting member for release of the holding member 25 from the locking bolt, such operation of the setting member by the inside handle being independent of the outside handle and the roll-back 30 by virtue of the arcuate slot in the setting member which receives the stud 34 on the link 33 extending from the roll-back. The slot in the setting member also permits unlocking of door by the outside handle without movement of the bar 44 connected with the inside handle.

Means are also provided for locking the door against opening from theoutside by operation of the outside handle. Such locking means may be controlled from the inside of the door or from the outside thereof. As shown, a locking plate position. The setting of the locking plate to dogging position may be accomplished by means of suitable key operable lock mechanism (not other end with a suitable handle or lever (not shown) on the inside of the door. Figure 3 shows the locking plate in its unlocking position to permit opening of the door by operation of the outside handle.

It "will be noted that the holding member 25 is not engaged directiy by any spring means tendm to force it into bolt holding position. The

movement of the locking bolt to its locking position is accomplished by two tapering or camming surfaces, one of these surfaces being the surface 21 on the holding member which engages the locking bolt stud, and the other surface being on the cam rail 40 on the setting member which engages the pin 4| on the holding member. These camming surfaces are of gradual tapering or incline and the camming load is distributed or divided between these two surfaces, There is therefore no chance for the holding member to become set or stuck and substantially the only eifort required on the door handle for unlocking of the door is that necessary to overcome the resistance of the springs 36 and 3'l,'and as this resistance is substantially constant, the force of the spring 31 will keep the camming surface 21 of the holding member against the lock bolt stud to take up any looseness in the bolt and to keep it in secure engagement with the locking abut- -ment on the keeper to keep the door at all times securely closed and to prevent rattle. When the lock bolt is in locking position shown on Figures 2 and 6, the pressure engagement of the bolt stud with the surface 21 of the holding member is to one side of the fulcrum axis of the holding member to hold the holding member with its pin in engagement with the cam rail. The slope of the cam rail being gradual, the cam rail will prevent rotation of the holding member and unlocking rocking of the latch bolt when an attempt is made to open the door by pull on the handle without rotation of the handle, and the door will be kept securely locked.

The spring 19, which is comparatively light,

' tends to hold the bolt stud H at all times against the edge of the holding member 25 or in the bolt should be in cocked position with its stud engaged by the\edge a, of the member 25 under stud leaves the recess 26.

pressure from the. spring 31 acting through the setting member 28 and pin 4l.- When the door is slammed, the initial rocking of the bolt by engagement with the keeper must rock member 25 against the resistance of spring 31 as the bolt This resistance to rocking of the bolt by the combined resistance of the springs I9 and 31, will prevent accidental movement of the bolt out of its cocked position while the door is open.

I have thus produced simple and efficient lock structure of the type described which may be readily controlled by ordinary effort on the door handle, and in which look structure the lock bolt functions to safety latch the door as well as to securely lock it in fully closed position.

I have shown a practical embodiment of the various features of my invention but do not desire to be limited to the exact construction, ar-

rangement and operation shown and described as changes and modifications may be made with- I claim as follows a 1. Lock structure for a door comprising a housing on the door, a latch bolt; fulcrumed on the housing for engagement with a keeper on the door frame to be rocked from a cocked position into latching engagement with the keeper when the door is swung to closed position, yieldable means tending to hold said bolt in cocked position, a holding member fulcrumed on said housing and having an eccentric edge engageable with said bolt for rocking said bolt to final locking position, a setting member on said housing, a camming connection between said setting member and said holding member adapted to move said holding member to holding position, and means under control of the door handle for actuating said setting member for release of said camming connection whereby to permit rocking of said bolt to unlocking position.

2. Door locking structure. comprising a housing on the door, a rockable latch bolt fulcrumed on said housing for engagement with a keeper on the door frame to be rocked into latching engagement therewith when the door is swung to closed position, a rotatable holding member, a

setting member, an eccentric camming surface on said holding member engageable with said bolt, a camming surface on said setting member engageable with said holding member, said camming surfaces cooperating, upon rocking of said bolt to locking position when the door is closed, to force said bolt intimately into locking engagement with the keeper.

3. Door lock structure comprising a housing on the door, a lock bolt fulcrumed for rocking move-.

ment on the housing for engagement with a keeper on the door frame, yielding means tendingto hold said lock bolt in cocked position when the door is open, a holding member held in one position by said bolt when in cocked position and being released from said bolt when the bolt is rocked'by engagement thereof with the keeper when the door is swung to closed position, a setting member on said housing having a cam surface thereon cooperable with said holding member to move said holding member to another position upon release thereof from said lock bolt, and an eccentric surface on said holding memrotate said holding member for rocking of the bolt thereby to locking position, and means under control of the door handle for actuating said setting member for release of said camming means for freeing said bolt from said holding member to permit opening of the door.

6. A door lock structure for mounting on a door comprising a rockable lock bolt for cooperation with a keeper on the door frame and adapted to assume a cocked position when the door is ope'n, a holding member on the door, means effective when said bolt is in cocked position to interlock said bolt and saidholding member to thereby hold said member in a release position when the door is open, a setting member on the door, spring means tending to move said setting member, cooperable abutments on said holding member and said setting member for holding said setting member against movement by said spring means when said holding member is in its release position, said bolt cooperating with said keeper to be rocked from its cocked position to locking position in the keeper when the door is moved to closed position, said movement of the bolt to locking position releasing said holding member for release of said setting member for operation thereof by said spring means, said holding member having a camming surface and said setting member having camming connection with said holding member, said camming connection being effective upon movement of said setting member by said spring means to move said holding member for application of its camming surface to said bolt for gradual forcing of said bolt into its final locking engagement with said keeper.

7. A door lock structure for mounting on a door and comprising a rockable lock bolt for cooperation with a keeper on the door frame, said bolt adapted to assume a cocked position when the door is open, a holding member on the door, means effective when said bolt is in cocked position to interlock said bolt and said holding member to thereby hold said member in a release position when the door is open, a setting member on the door, spring means tending to move ber engaged with said bolt upon movement of said holding member to said other position by said camming surface whereby said bolt is rocked into full locking position with said keeper to hold the door fully closed.

4. Lock structure for a door comprising a, rockable lock bolt cooperablewith a keeper adjacent to the door, a rotatable holding member having an eccentric camming surface engageable with the bolt for rocking thereof to locking position, setting means having camming connection with said holding member for rotation thereof for engagement of its camming surface with the bolt, and means under control of the door handle for actuating said setting means to release said camming connection tofree said bolt for door opening movement.

5. Door locking structure comprising a rockable lock bolt on the door for cooperation with a keeper adjacent the door, a rotatable holding member having an eccentric edge for rocking the bolt to locking position after closing of the door, a setting member provided with camming means, yielding means tendiing to move said setting member for operation of said camming means to said setting member, cooperable abutments on said holding member and said setting member for holding said setting member against movement by said spring means when said holding member is in its release position, said bolt c0- operating with said keeper to be rocked from its cocked position to locking position in the keeper when the door is moved to closed position, said movement of the bolt to locking position releasing said holding member for release of said setting member for operation thereof by said spring means, said holding member having a camming surface and said setting member having camming connection with said holding member, said camming connection being effective upon movement of said setting member by said spring means to move said holding member for application of its camming surface to said bolt for gradual forcing of said bolt into final locking engagement with said keeper, an abutment on said setting member, and means under control of the door handle for moving said setting member for release of said camming connection and for engagement of said abutment with said holding member for return of said holding member to its release position whereby to free said bolt for return from its locking position to its cocked position.

8. A look structure for a doorcomprising a rockable lock bolt on the door cooperable with a keeper mounted on the door frame and provided with a locking abutment and a safety catch abutment, a holding member on the door movable to a release position or to a holding position, yielding means for holding said'bolt in a cocked position, means effective when said bolt is in cocked position to hold said holding member in its release position, a setting member on the door, spring means tending to move said setting member in one direction, cooperating abutments on said setting member and said holding mem-.

her for preventing movement of saidsetting ment of said setting member by said spring means whereby said holding member camming surface will be engaged with'said bolt for final rocking movement thereof into locking engagement with the keeper locking abutment, means under control of the door handle for moving said setting member in reverse direction against said spring means for disengaging its cam means from said holding member, said setting member having an abutment engageable with said holding member during such reverse movement of said setting member for restoring said holding member to its release position whereby said bolt may return to its cocked position as the door is beingopened, said safety catch abutment on said keeper being in the path of said bolt when returned to its cocked position, and means effective upon continued movement of said setting member by said door handle for moving said holding member beyond its release position and into engagement with said bolt to rock said bolt a sufli-v cient distance to clear it from said safety catch abutment whereby said door may then be fully opened.

EDWARD D. DALL.

Images