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Publication numberUS2922672 A
Publication typeGrant
Publication dateJan 26, 1960
Filing dateAug 15, 1957
Priority dateAug 15, 1957
Publication numberUS 2922672 A, US 2922672A, US-A-2922672, US2922672 A, US2922672A
InventorsHarold E Van Voorhees
Original AssigneeGen Motors Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door latch for pillarless automobile
US 2922672 A
Abstract  available in
Images(9)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Jan. 26, 1960 H. E. VAN vooRHEEs 2,922,672

nooR LATCH FOR PILLARLEss AUTOMOBILE Filed Aug. 15, 1957 9 Sheets-Sheet 1 TTORNEY.

9 Sheets-Sheet 2 H. E. VAN VOORHEES DOOR LATCH FOR PILLARLESS AUTOMOBILE Jan. 26, 1960 Filed Aug. 15, i957 Jan. 26, 1960 H. E. VAN vooRHEES 2,922,672

DOOR LATCH FOR PILLARLEss AUTOMOBILE 9 Sheets-Sheet 3 Filed Aug. 15, 1957 ATTORNEY.

Jan. 26, 1960 H. E. VAN vooRHEEs 2,922,672

' nooR LATCH FOR PILLARLEss AUTOMOBILE Filed Aug. 15. 195'? 9 Sheets-Sheet 4 .4 TTORNEY.

Jan. 26, 1960 H. E. vAN vooRHEl-:s 2,922,672

DOOR LATCH FOR PILLARLESS AUTOMOBILE Filed Aug. 15, 1957 9 Sheets-Sheet 5 INI/ENTOR.

ATTORNEY.

Jan. 26, 196'() H. E. VAN vooRHEEs 2,922,672

I DooR LATCH FOR PILLARLEss AUTOMOBILE Filed Aug. l5, 1957 9 Sheets-Sheet 6 INVENTOR.

Jan. 26,1960 H. E. VAN vooRHEr-:s 2,922,672

DooR LATCH FOR PILLARLEss AUTOMOBILE 9 Sheets-Sheet '7 Filed Aug. l5, 1957 A7' ORNEY.

Jan. 26, 1960 H. E. VAN vooRHEEs 2,922,672

DOOR HATCH FOR PS [LLARLESS AUTOMOBILE Filed Aug. 15, 1957 9 Sheets-Shea?I 8 Ar ORA/EY.

Jan. 26, 1960 H. E. VAN vooRHEEs 2,922,672

DOOR LATCH FOR PILLARLEss AUTOMOBILE 9 Sheets-Sheet 9 Filed Aug. 15, 1957 ATTORNEY.

Unite States DOOR LATCH FR PILLARLESS AUTOMOBILE Application August 15, 1957, Serial No. 673,272

8 Claims. (Cl. 292-11) This invention relates to automobile door latching means, and more particularly to improved latching means for a pillarless four-door automobile.

One feature of the invention is that it provides improved door latching means; another feature of the invention is that it provides an improved mechanical and motor operated latch; still another feature ofthe inventionis that the latch may be operated mechanically without operation of the motor, as in the event of power failure; a further feature of the invention is that it provides novel means for latching the front and rear doors to each other and to th'e automobile sill and rocker panel; another feature of the invention is that it provides a latching system for a pillarless automobile wherein the front and rear doors are latched to each other vwith a hook type latch insuringV that the doors cannot be pulled apart; still another feature of the invention is that it provides for locking the doors without the useof a key; yet a further feature of the invention is that, in one form, the door may be .locked by the inside lock operator While the door is open and the door may then simply be slammed shut and be locked without a key; yet a further feature of the invention is that, in another form, a conscious act on the part of the operator (as depressing the outside push button) risnecessary to accomplish keyless locking; and another feature of the invention isr that there is a main latch common to the front and rear doors, with mechanical means for releasing the latch to open the front door to insure instantaneous release of the latch and electrical means for releasing the latch to open the rear door toavoid the necessity of a complicated mechanical linkage system.

Other features and advantages of the invention will be apparent from the following description and drawings, in which:

Fig. 1 is a fragmentary side elevation of an automobile having the improved latching means, structure which underlies the outer panels of the automobile doors being shown in broken lines;

Fig. 2 is an enlarged vertical longitudinal section taken inside the outer frontend rear door panels, the latch being shown in side elevation and partly in section with the latch bolt in latching position;

Fig. 3 is a view similar to Fig. 2 but with the bolt in retractedvposition;

Fig. 4 is a transverse vertical section through the front door taken along the line 4 4 of Fig. 3;

Fig. 5 is a vertical longitudinal section taken along the line 5 5 of Fig. 4;

Fig. 6 is a detail section through part of the latch operating means taken along the line 6 6 of Fig. 4;

Fig. 7 is a fragmentary view of the latch drive means in a modied form of the invention;

Fig. 8 is a view similar to Fig. 2 but showing a modied form of keyless locking;

Fig. 9 is a vertical section taken along the line 9 9 0f Fig. 8;

atent Fig. 10 is a view similar to Fig.l 2 but showing another modified form of the invention;

Fig. l1 is a View showing the rear door operating means of Fig. 3 taken along the line 11 11 thereof;

Fig. 12 is a sectional view showing a portion of the sill latch;

Fig. 13 is a detail section through Va portion of the rocker panel taken along the line 13 13 of Fig. l5;

Fig. 14 is a section showing the sill latch in elevation, taken along the line 14-14 of Fig. 12;

Fig. 15 is a similar section taken along the line 15-15 of Fig. l2;

Fig. 16 is a section through the bolt and detent of the sill latch taken along the line 16 16 of Fig. l14;y

Fig. 17 is a view similar to Fig. 14 `but showing a modified form of sill latch for use with the main latc'h of Fig. 8; and l Fig. 158 is a schematic diagram of an electrical circuit for operating the latch means. Y

This door latch is particularly designed for a pillarless four-door automobile of the type generally designated as 2t) in Fig. l. The automobile has a front door 22 hingedly mounted at its front side on the body and a rear door 24 hingedly mounted at its rear side on the body, and the free edges of the doors lie closely adjacent each other when the doors are closed. The hinge mountings for the doors may be conventional and are not illustrated. The doors are of the so-called convertible type which do not have a window frame, so` consequently there is no means for latching the doors to the side roo-f rail of the automobile.l The doors 22 and 24 are latched Vto each other adjacent the belt line of the automobile by a main latch designated generally as 26, and the front door is latched at its lower rear corner to the automobile sill or rocker panel 27 by a subsidiary sill latch designated generally as 23, while the rear door is latched kat its lower front corner to the sill by a subsidiary sill latch designated generally as 30. The front door may be opened from the outside lby means of a push button 32 mounted in a fixed gripping handle 34, or the door may be opened from the inside by means of a remotely located handle 36 connected to the main latch through an actuating rod 38. The rear door may be opened from the outside by means of` an outside push button 40 mounted in a fixed gripping handle 41 or the door may be opened from' the inside by means of a remotely located inside handle 42 connected to the lrear door latch operating means through a rod 44.

General description The front door 22 carries the main door latch 26, which latch has a pivotally mounted hook-shaped bolt 46 which is operated mechanically through a spring or electrically through a motor and which is adapted to engage in a striker 48 on the rear door 24 to latch the front and rear doors together. A reversible motor Sti is connected through a conventional type gear box52 to a driving gear sector 54 which pivotally mounts an actuating link 56. At its upper end, the actuating link is connected to the main latch 26 for moving the bolt between a projected or latched position as shown in Figs. 2 and 5 and a retracted or unlatched position as' shown in Fig. 3. As will appear from the description of the electrical system, the motor 5l? 'has a retracting circuit and a latching circuit. When the front door is opened, the bolt is released mechanically, but when the rear door is opened the bolt is 4released through the motor driven actuating link 56. When both doors are closed, the bolt is swung There is also a mechanically operated subsidiary silll latch 2S at the bottom of the front door 22 and an identical sill latch 30 at the bottom of the rearv door 24. These sill latches, which are shown in Figs. 12-16, anchor the bottom of the respective doors to the sill or rocker panel Z7.

When the front door inner remote handle 36 or outer push button 32 is operated Ato open the door, the sill latch is released mechanically through a rod S. At the same time a motor switch in the sill latch is operated to close the retracting circuit to the motor 50. A motor driven linkage moves to retract the main latch bolt 46, although the bolt is actually more quickly retracted through a linkage mechanically coupled to the push button and remote handle. Since the bolt is released mechanically when the front door is opened, the door can be opened in the event of power failure.

Operation of the rear door push button 40 or inside remote handle 42 pulls up on a rod 60 to trigger the rear door sill latch 30. At the same time, a switch is actuated to close the retracting circuit of the motor 50 in the front door and release the main latch bolt to unlatch the rear door from the front door. 'Iihere is no mechanical main latch release means for opening the rear door.

Upon closing the door, door still switches are actuated to operate the motor 50 and project the bolt 46 to its latched position. The electrical circuit includes interlocks to prevent the bolt 46 from being moved to latched position when either door is open.

Operating circuit In order to control the reversible motor 50 there are six single throw switches in the frontdoor and four single pole, single throw switches in the rear door. The ten switches are arranged in pairs, each pair having a common actuator. As shown in Fig. 1, in the front door there is a pair of motor switches d and k, the switch a being normally closed and the switch k being normally open. Normal conditions are taken to be when both front and rear doors are closed and the -main latch is latched. The front door also carries a pair of motor limit switches (see Figs. 2 and 3) e (normally open) and f (normally closed) and a pair of sill switches d (normally closed) and g (normally open). In the rear door there are a pair of motor switches b (normally closed) and j (normally open) and a pair of sill Switches c (normally closed) and h (normally open).

'Ille motor switches operate the motor 50 to control the main latch 26 when one of the doors is Aopened by the front or rear inner or outer operating means; the limit switches deenergize the motor when the bolt projecting or bolt retracting cycle is completed; and the sill switches operate the main latch when the door is slammed shut and also provide aninterlock to lprevent projection of the bolt 46 unless both doors 22 and 24 are closed so that the bolt and striker are in their proper interengaged positions. lf the' bolt were projected when one of the doors was open, closing that door would cause the side of the Striker to smash the side of the bolt, damaging the parts without consummating the latching operation.

Assuming both doors to be closed, which is the condition shown in the wiring diagram in Fig. 18, the front door can be opened either by its handle 36 or by its outside push .button 32. Manipulation of the front door handle or the front door push button mechanically releases the bolt 46, as later will be described, so that the bolt moves through the force of a spring out of latching engagement with the striker 48; however it is necessary to operate the motor to locate the parts in position to move the bolt back to latching position. At the same time, the rod S8 which connects the main latch to the still latch triggers the sill latch 28 so that the door can be opened. The conventional `sealing weather strip mounted on the body around the edge of the door opening will kick the door slightly open when both bolts (the main latch and the sill latch) are released. As the rod 58 moves to trigger the sill latch, an actuator 58a on the rod 58 opens switch a in the motor latching circuit and closes switch k in the motor retracting circuit. In Fig. 18, the latching circuit comprises that portion of the diagram located at the right of the motor 50 and the retracting circuit comprises that portion of the circuit located at the left of the motor 50. Both circuits are connected to the 54 drives the actuating link 56 downwardly to a position in which it can pick up the bolt (which is now retracted) so that the motor can drive the bolt back to projected position when the door is closed. As the motor 50 pulls the actuating link 56 down, a switch operating lug 56a on the link moves away from limit switch e, allowing it to close. is not energized. When the door is manually pulled open, sillV switch d in the latching circuit is opened and sill switch g in the retracting circuit is closed, this latter switch providing a holding circuit around switch k so that the motor 50 remains energized even though switch k closes when the actuating rod 58 moves back to its normal position when the door handle or push button is released. When the actuating link 56 reaches its fullyr retracted position, lug 56a operates limit switch f in the retracting circuit to break the circuit to the motor 50.

When the front door 22 is slammed shut (assuming the rear door 24 to be shut) sill switches d and g are returned to the condition shown in the wiring diagram, switch d being closed and switch g Ibeing open. These switches are operated by movement of the bolt on the sill latch to its Vlatched position as the door is closed. In Fig. `16 the switches d and g are shown as being located in a single housing. Both switches are controlled by a common operatingarm 130er and roller 1301; controlled by a switch operating lever 126 on the sill latch. If desired, the motor switches a, k may be mounted on the sill latch 28 and be operated in a manner similar to switches d, g. Since the motor limit switch e is now closed and since motor switch a also is closed, a latching circut is closed through switches a, b, c, d and e to energlze motor 50 and drive the bolt 46 back to its latched posltion as shown in Figs. 2 and 5. When the bolt reaches this latched position, the lug 56a on the actuating link 56 opens limit switch e to break the circuit to the motor.

In order to open the rear door, either the inside or outside operating mechanism may be manipulated to pull up on the rod 60 which is connected to the rear sill latch 30. An actuator 60a on the rod 60 opens switch b in the latching circuit of the motor 50 and closes switch j in the retracting circuit, thereby energizing motor 50 to retract the bolt 46. When the bolt reaches its retracted position, the vlug 56a on actuating link 56 opens limit switch f to bilealr the retracting circuit.. When the rear door moves away from the rocker panel so that the bolt in the rear sill latch 30 moves from latched to unlatched position, rear sill switch c in the latching circuit is opened and rear sill switch h in the retracting circuit is closed, this latter switch providing a holding circuit around the motor Switch y so that the motor 50 continues to be energized even though the rod 60 is returned to its normal posiiton when the manual operating mechanism is released. Sill switches c and h may be arranged and operated similarly to sill switches d and g in the front door.

When the rear door is slammed shut (assuming the front door to be closed), sill switch h is opened and sill switch c is closed, this latter switch completing a latching circuit through motor 50 tordrive the bolt 46 to latched position.

Since switch a is now open, the latching circuit Since the bolt 46 latches the front door 22 to the rear door 24, the bolt must remain retracted so long as either door is open. Assuming ybeth doors to be open and the front door to be slammed shut, the sill switch c in the rear door will still be open so that motor 50 cannot be energized despite the fact that all the other Switches in the latching circuit are closed. When the rear door is closed, sill switch c will close and motor 56 will be energized.

Main latch The main latch 26 which is carried by the front door is mechanically triggered to open the door upon operation of either the outside push button 32 or the inside remote handle 36. When the door is closed, the latch bolt is driven to latched position by the motor 50. Consequently, upon opening the door (despite the fact that the latch bolt is triggered mechanically), it is necessary to drive the motor in unlatching direction to arrange the latching parts in position to pick up the bolt mechanism when Vthe bolt is to be projected. As shown best in Figs. 2, 3, 4 and 5, the hook-shaped bolt 46 is pivotally mounted on the latch frame 64 by a rotatable stud 66. A coil spring 68 has its inner end anchored on the stud 66 and its outer end hooked to a pin 70 projecting from a flange part 64a of the latch frame. The spring yieldably urges the bolt toward the unlatched position of Fig. 3 and the bolt is held in latched position by a foot 72a on adetent 72 which is pivotally mounted on a stud 74 on the latch frame and which is urged by a spring 76 into blocking relation with a shoulder 46b on the bolt.

The outside push `button 32 is slidably mounted in conventional manner in a lock cylinder housing 78 and a push rod 80 projects out of the inner end of the lock cylinder for engagement with a pivoted operating pawl 82 which is mounted on a pin 82a on a shiftable locking carriage 83. When the push button is depressed, the pawl swings against the operating lever 84 which is pivoted on a stud 86 on the latch frame, swinging the operating lever in a counterclockwise direction in Fig. 4 so that a turned flange 84a on the operating lever engages a turned portion 72c at the free end of the detent 72 and swings the detent out of blocking relation with the bolt, whereupon the spring 68 pivots the bolt from the latch position of Figs. 2 and 5 to the unlatched position of Fig. 3. In Fig. 4 the detent is shown in unlatched position. When in latched position, the portion 72e` of the detent is located down closer to the ange 84a of the operating lever.

Simultaneously, a ange 84h at the lower end of the operating lever 84 swings a remote lever S8 in a clockwise direction as the parts appear in Fig. 5. Referring to Fig. 5, the remote lever has three arms and is pivotally mounted at 90 on the latch frame adjacent the intersection of these arms. The remote lever has a short generally horizontally extending arm 88a with a slotted end receiving the flange 8419 of the operating lever 84 and an oppositely extending generally horizontal arm 88h on the remote lever is connected at its end to the rod 58 which extends down to the sill latch. The third arm 88C of the remote lever 88 extends downwardly from the pivot 90 and is vconnected to the rod 3S for operation by the inside remote handle 36.

As pointed out earlier, the subsidiary sill latch 28 is released through the rod 58 simultaneously with release of the main latch bolt 46 and this operation closes the motor retracting circuit so that the motor operates to locate the parts in their proper position to pick up the bolt 46 and drive it back to latched position. When the motor runs, the driving gear sector S4 is turned in a clockwise direction in Fig. 5 torpull down on the actuating link 56. At its upper end, the actuating link is pivotally connected to an actuating lever 92 which is pivoted at its other end on the stud 66. The lever 92 V-6 has a lug 92a which' may pick up a lug 46a projecting from the vbolt to move the bolt to unlatched position. An actuating pawl 94 is pivoted on a stud-96 projecting from the actuating link 92 and an overcenter acting spring 98 connects the parts 92 and 94 for holding the Vpawl 94 in an operative position or an inoperative position on the link 92. The pawl has a notch 94a adapted to make driving connection with lug 46a projecting from the bolt when the pawl is in operative position as shown in Fig. 3. When the pawl is in inoperative position as shown in Fig. 2, the pawl is out of the way of the lug 46a and the pawl is disconnected from the bolt. A tail 94b on the pawl 94 is adapted to engage a stop block 100 when the parts approach latched position as shown in Fig. 2 to cause clockwise movement of the pawl 94 relative to the actuating lever 92 and move the notch 94a on the pawl away from the lug 46a on the bolt. When the pawlapproaches the position of Fig. 3, the tail 94b strikes a stop block 101 on the frame to flip the pawl back to an operative position.

In order to lock the door, there is aflip lever 102 keyed to a stud 104 which is pivotally mounted on the inner door panel. An inside ilip lever 106 on the inner end of the stud has a free end formed with a slot 106a receiving a flange 108er on the inner end of a locking lever 108 which is pivoted intermediate its ends on a pin 110 to the lock frame. The outer end of the locking lever has a turned ange 108b With a slot which `receives a pin 112 projecting from the shiftable carriage 83 which is pivotally mounted on the latch frame at 113. This outside locking lever is adapted to be swung either upon rocking movement of the lever 108 or upon turning movement of a key in the key cylinder operating through the push rod 80 to shift the carriage 83 between locked and unlocked positions. A spring 115 holds the carriage in either position. Upon inside or outside locking operation, the carriage 83 swings to move the pivoted operating pawl 82 out of alignment with a ange on'the operating lever so that the outside push button merely free wheels when depressed and the door cannot be opened from outside. As shown in Fig. 4, the locking lever 108 and the operating lever 84 have complementary projections 108C, 84e adapted to abut when the door is locked. These abutting parts permit the door to be unlocked and opened upon operation of the inside handle 36.

Sill latch Figs. 12-16 show the front door sill latch to which the lower end of the connecting rod 58 is attached. As shown best in Fig. 14, the lower end of the rod 58 is connected to a detent '116 pivotally mounted on the subsidiary latch frame 118 on a pin 120 and urged by a spring 122 into holding engagement with the subsidiary latch bolt 124. The free bifurcated eind of the bolt is adapted to engage a striker 125 mounted on the rocker panel 27. As shown in Fig. 14, the bolt has a latching shoulder 124a and a safety shoulder 1124!. Underlying the detent 1.16 and also pivotally mounted on the pin 120 is a switch operator 126 which is urged toward the bolt by a leaf spring 128. The switch operator 126 is formed with a ange 126a overlying the upper edge of the detent so that when `the detent is raised, the switch operator also is raised. An arm 12611 on the switch operator ends in a right angle ange for camming engagement with the bolt so that the operator, which may move in one direction independently of the detent, is also controlled by the bolt to operate the switches d, g at the proper time as the bolt 124 moves between latched and unlatched positions. As shown in Fig. 16, the switches are controlled by a single actuating arm .130a which mounts a roller 130b for engagement by the switch operator 126.

Referring to Fig. 15, the lower edge of the door 2v2 carries a tapered guide stud 134 which, when the door is closed, enters a guide housing 136 on the rocker n7 panel. Thespring-pressed shoe 138 Vin the housing ahuts the upper surface of the guide stud 134 to insure tight wedging engagement and assists in holding the door rmly closed.;

, Rear door operating mechanism As shown best in Figs. 2, 3, and 11, the rear door striker 48 comprises a housing 140 with a forwardly opening recess :142 for receiving the bolt, said housing having a` front lower wall 140C: which, with the hooked nose of the bolt, forms an interlock to prevent the doors from being pulled apart.

Operation of the rear door outside push button 40 yor the rear door remote handle 42 mechanically releases the rear door sill latch 30 and electrically operates the main latch 26 through closure of the unlatching circuit to the motor. A three-armed remote lever144 which is pivotally mounted at the juncture of its arms on a pin 146 projecting from a mounting bracket 14S, has a rearwardly extending generally horizontal' arm 144e which is connected to the upper end of the rod 60 which extends down to the rear sill latch 30. A short forwardly'extending generally horizontal arm 144b on the remote lever 144-is connected to the rear door outside push button operating mechanism and a downwardlyexte'nding arm 144C on the lever 144 isconnected by the rod 44 to Vthe'inside' remote handle 42. Operation of the remote handle 42 or the outside push button 40Y swings the lever 144 in a clockwise direction in Fig. 2 to pull up on the rod 60 and trigger the sill latch in the same manner as described in Figs. 14, l5 and 16 in connection with the front door. The outside push button operates a Vpush rod 150 which abuts a pawl 152 pivoted on a shiftable carriage 155. When the outer push button is depressed, the pawl swings inwardly to pick up a ilange156a on one arm of a bell crank 1 56 pivoted on a stud 158 and yieldably biased toward the pawl by a spring 160. A stop 162 (Fig. 1l) limits clockwise swinging of the bell crank. The `free end of the bell crank terminates in a flange 156b *which is received in a slot in the end of the arm 144b of the rear remote lever 144 so that operation ofthe outside push button 40 (when in unlocked condition) swings the remote lever 144 clockwise as above described. When the motor 5 0 runs in an unlatching direction, a cam pin 157 projecting from the ac-v tuating link pivot engages a cam follower surface 72b on the detent and cams the detent 72 out of latching engagernent with the bolt sothat the bolt may be retracted by the spring 68 `or by the lug 92a, which may pick up lug 46a on the bolt. At the same time, the motor runs to pull the motor latching parts down to their unlatching position ready to engage the bolt to drive it back to latched position.

In the rear door there is no outside key lock; but there is an inside locking means comprising a iiip lever 164 keyed to a stud` 166 rotatably-journaled in the inner door panel and mountingon its inner end a crank 168 with a flange 168e which seats in a slot in the bifurcated end of alever 170 which is pivoted intermediate its ends on a pin 172. The other end of the locking lever is connected to a pin 112 projecting from the shiftable carriage 155 so that when the flip lever 164 is operated to lock the door, the pawl 152 is swung out of the path of movement of the outer push button operator 150 and this operator merely free wheels.

Mode 0f operation The front door 22 may be opened by means of the out- Vside push button 32 or the inside remote handle 36. When the push button is operated, it acts Vthrough the push rod 80 and the pawl 82 to swing the lever 84 which in turn picks up the remote leverr88. Simultaneously, the lever 84 lifts the detent 72 in the main latch out .of holding engagement with the bolt 46 and the bolt is retracted by the spring 68. VThe rod 58 lifts the .detent 116 in the sill latch free of the silllat'ch bolt 1,24 and simultaneously 8 operates the motor switches inthe manner earlier described so that .the linkage associated with the motor `is driven to retracted position. kIf the door is opened by means of the inside remote handle 36, the' same sequence of events occurs except that the handle 36 operates directly on the remote lever 88."

' The front door may be locked either by a key from the outside or by the flip lever 102 on the inside of the car. In either event, the lock lever 108 is swung to shift the carriage 83 and uncouplethe outside operating parts so that the outside push button 32 free wheels.

The rear door may be opened by means of the outside push button Y40 or the inside remote handle 42. Actuation of either yone of these operators swings the remote lever 144 to lift up on the rod 60 and trigger the detent in the sill latch 30. Simultaneously, the rod operates the switches b, j to start the motor on its retracting cycle whereupon the cam pin 157 lifts the detent 72 in the main latch out of engagement with :the bolt 46 to permit the spring 68 to retract the main latch bolt.V As the motor and its associated parts move to retracted position, the lug 92a picks up the lug 46a on the bolt and swings the bolt to retracted position if the spring 68k has not already done so. i Y

When the doors are open, the interlock arrangement shown in the circuit of Fig. 18 prevents the latch circuit of the motor from being energized until both doors are closed `so that the bolt 46 isnot moved to latched position by the motor driven gear 54 until both doors are closed.

Either the front or the rear door may be opened, put in locked condition while open, and then slammed shut to lock the door from theoutside without a key. Since the front doorA push button operator 32 is disconnected from the lever 84 and since the rear door push button operator 40 is disconnected from 4the lever 156, either door will be locked by this single step (i.e., the step of placing the 'parts in either door in locked condition). The front door mechanism is arranged to provide for so-called automatic undogging by the inside handle, that is, when the door is locked, it still may be opened from the inside.v When the inside remote handle 36 is operated to swing the remote lever88 in a clockwise direction in Fig. 5, the operating lever 84, which is'connected to the remote lever, is swung in a counterclockwise direction so thatthe projection 84C which, in locked position, abuts the projection 108i.` on the locking lever 108, swings ythe locking lever 108 up to its unlocked position. Similarly, the rear door may be opened from Vinside when Veither front or rear door is locked. Since the rear door remote handle 42 is conf nected directly to the rear remote lever 144, operation of the handle swings the lever to raise up on the rod 60. This triggers the sill latch 30 and also closes the, motor retracting circuit to start the motor. As the actuating link 56 pulls down, the pin 157 cams the detent 72 out of engagement with the main latch bolt. Y

Modified forms Y Fig. 7 shows a modified form of the invention in which the drive sector gear 54 of Figure 5 is replaced with a crank arm 200. This arm is connected to an output shaft 202 on the gear box'52 and the `free end of the arm 4is pivotally connected to the actuating link 56. Stops 204 and 206 are provided on the lock plate 64a for abutment by the actuating arm to limit coasting of the motor after the circuitV has been broken. In all other respects the structure ofV Fig. 7 is similar to that of Fig. 5.

Figs. 8 and 9 show a modification of the main latch to obtain two step keyless locking, ie., keyless locking in which the parts must be placed in locked condition and also in which the operator must do a conscious act while closing the door in order to lock the door Without a key. In thev structure of Figs. 8 and 9, it is necessary to depress the outer push button while theY door is being closed in order toY achieve keyless locking. Otherwise, the locking mechanism will be moved back .to unlocking condition as JIJ.

the door is slammed shut. Fig. 17 shows a sill latch which is used with the main latch of Figs. 8 and 9.

In Fig. 8 an undogging pawl V210 is pivotally mounted at 212 on the latch frame. The pawl has a hook end 210:1 adapted to engage the pivoted pawl 82 under certain conditions of operation to swing the pivoted pawl 82 .and the cam'age 83 back to unlocked condition. The undogging pawl 210 is formed as a bell crank and its other arm is connected to a rod 214 which, as shown in Fig. 17, extends down to the sill latch and is connected to an extension arm 116a formed integrally on the detent. When the door is slammed shut, the operating foot of the detent will cam over the bolt teeth since the bolt pivots from unlatched position to latched position as it engages the striker. This camming action of the detent will pull down on the rod 214, swinging the undogging pawl in counterclockwise direction in Fig. 8 so that its hook end l210i: strikes the pivoted pawl 82 and shifts it back to unlocked position. If, however, the outside push button is depressed while the door is being slammed shut, the push rod Y8i) will move the pivoted pawl 82 out of the path of movement of the undogging cam so that the pawl 82 will not be shifted back to unlocked position. Consequently, if the parts are placed in locked position while the door is open and the outside push button is depressed while the door is being shut, the door will be locked without the use of a key.

Fig. l shows a modification in which the motor and associated parts are replaced by a hydraulic cylinder 220 mounting a piston 222. The cylinder is pivotally mounted on the door at 224 and a compression spring 226 in the cylinder acts to drive the piston down in the cylinder. The piston rod 228 is connected at its upper end to the actuating link 92. The lower end of the cylinder is connected by a line 230 to the brake lluid reservoir or to some other hydraulic system in the car. In other respects, the modification of Fig. l0 is similar to the arrangement earlier described. The switches in the electrical circuit may be connected in conventional manner to solenoid valves to control the operation of the piston 222 in the cylinder.

While I have shown and described several embodiments of my invention, it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim:

l. A door latching system for a pillarless automobile having a body with front and rear doors, the free edges of which lie closely adjacent each other when the doors are closed, including: a main latch on one door having a pivotally mounted bolt with a hook shaped latching nose; a striker on the other door for engaging said bolt to latch the doors together when the doors are closed, said striker having a recess with an upstanding wall behind which the nose of the bolt is received to interlock the doors against longitudinal separation; a subsidiary latch on each of said doors for latching each door to the body; first control means on the front door including a common actuator for the main latch and the front door subsidiary latch; and second control means on the rear door including a common actuator for the main latch and the rear door subsidiary latch.

2. A `door latching system for a pillarless automobile having `a body with front and rear doors, the free edges of which lie closely adjacent each other when the doors are closed, including: a main latch on one door having a pivotally mounted bolt with a hook shaped latching nose; a striker on the other door for engaging said bolt to latch the doors together, said striker having a recess with an upstanding wall behind which the nose of the bolt is received to interlock the -doors against longitudinal separation; a subsidiary latch on each of said doors for latching each door to the body; electrical means 4for operating said main latch; mechanical means for operating said main latch and for operatingeach subsidiary latch;

viirst control means on the front door including a common actuator for said electrical means and for the mechanical operating means for the main latch and the front subsidiary latch; and second control means on the rear `door including'a common actuator for saidV electrical means and for the mechanical operating meansfor the rear subsidiary latch.

3. Apparatus of the character claimed in claim 2, wherein said first-mentioned mechanical means are connected directly to the main latch, whereby the main latch is released mechanically ahead of operation by the electrical means. v

4. A door latching system `for a pillarless automobile having a body with front and rear doors, the free edges of which lie closely adjacent each other when the doors are closed, including: a main latch on the front door, said latch having a pivotally mounted bolt with a hook shaped latching nose, said bolt being movable between latched and unlatched positions; a striker on the rear door for engaging said bolt to latch the doors together when the doors are closed, said striker having a recess with an upstanding wall behind which the nose of the bolt is received to interlock the doors against longitudinal separation; a subsidiary latch on each of said doors for latching each door to the body; electrical means for operating said main latch; first mechanical means for operating the main latch and the front door subsidiary latch; second mechanical means for operating the rear door subsidiary latch; rst control means on the front door including a common actuator for said electrical means and for the mechanical operating means for the front subsidiary latch and the front main latch; second control means on the rear door including a common actuator for said electrical means and for the mechanical operating means for the rear subsidiary latch; and electrical interlock means preventing operation of said bolt to latched position when either door is open.

5. A door latching system for a pillarless automobile having a body with front and rear doors, the free edges of which lie closely adjacent each other when the doo-rs are closed, including: a main latch on the front door, said latch having a bolt movable between latched and unlatched positions; a striker on the rear door, said bolt engaging in said striker to latch the doors together when the doors are closed; a subsidiary latch on each of said doors for latching each door to the body; electrical means for operating said main latch; mechanical means for operating said main latch and each subsidiary latch; first control means on the front door including a common actuator for said electrical means and for the mechanical operating means for the main latch and the front subsidiary latch; second control means on the rear door including a common actuator for said electrical means and for the mechanical operating means for the rear subsidiary latch; and locking means for uncoupling the actuator in said first control means from the electrical and mechanical operating means.

6. A door latching system for a pillarless automobile having a body with front and rear doors, the free edges of which lie closely adjacent each other when the doors are closed, including: a main latch on the front door, said latch having a bolt movable between latched and unlatched positions; a striker on the rear door, said bolt engaging in said striker to latch the doors together when the doors are closed; a subsidiary latch on each of said doors for latching each door to the body, electrical means for operating said main latch; mechanical means for operating said main latch and each subsidiary latch; lirst control means on the front door including an inside actuator and an outside actuator, each of which is common to said electrical means and to the mechanical operating means for the main latch and the front subsidiary latch; second control means on the rear door including an inside actu- 11 ator and an outside actuator, each of which is common to said electrical means and to the mechanical operating means for the rear subsidiary latch; and locking means for uncoupling the outside actuator of said first control means from the electrical `and mechanical operating means.

7. A door latching system for a pillarless automobile having a body with front and reardoors, the free edges of which lie closely adjacent each other when the doors are closed, including: a main latch on the front door, said latch having a bolt movable between latched and unlatched positions; a striker on the rear door, said bolt engaging in said striker to latch the doors together when the doors are closed; a subsidiary latch on each of said doors for latching each door to the body; electrical means for operating said main latch; lirst mechanical means for operating said main latch Vand said front door subsidiary latch; second mechanical means for operating said main latch and the rear door subsidiary latch; rst control means on the front door including inside and outside actuators which are common to said electrical means and to the mechanical operating means for the main latch and the front subsidiary latch; second control means on the rear door including inside and outside actuators which are common to said electrical means and-to themechanical operating means for the rear subsidiary latch; locking means including a shiftable member for uncoupling the outside actuator in said first control means from the operating means; and undogging means including an undogging lever which is mounted for movement as a function of closing of the door to shift said locking means back to coupled relationship, said locking means being movable out of the path of movement of said lever upon operation of saidroutside actuator when the door is being closed to retain the locking means in uncoupled relation. v 8. Apparatus of the character claimed in claim 7, Where-V inthe main latch bolt has a hook shaped latching nose and wherein said striker has la recess with an upstanding wall behind which the nose of the bolt is received to interlock the doors against longitudinal separation.

-k References Cited in the ijle of this patent UNITED STATES PATENTS 2,799,154 Beal July 16, 1957 Y`2,811,382, Harman Oct. 29, 1957 .2,822,203 Griswold et al Feb. 4, 195 8 2,827,321 Leslie et al Mar. 18, 1958

Patent Citations
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US2822203 *Feb 17, 1955Feb 4, 1958Gen Motors CorpDoor latch and control means
US2827321 *Jan 19, 1955Mar 18, 1958Gen Motors CorpDoor latch for a pillarless automobile
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3039290 *Jul 11, 1960Jun 19, 1962Gen Motors CorpCoincidental door locking system
US3386759 *Jul 18, 1966Jun 4, 1968Gen Motors CorpClosure latch
US3386760 *Jul 18, 1966Jun 4, 1968Gen Motors CorpClosure latch
US3409321 *Dec 30, 1964Nov 5, 1968Chrysler CorpDoor latch
US3596960 *May 15, 1969Aug 3, 1971Volkswagenewerk AgAuxiliary lock for doors of motor vehicles
US3851905 *Dec 26, 1973Dec 3, 1974Volkswagenwerk AgLatching mechanism for sliding doors in a motor vehicle
US4135377 *Nov 30, 1976Jan 23, 1979Arn. Kiekert SohneCentral locking equipment for vehicle doors
US4706512 *May 16, 1985Nov 17, 1987Delco Products Overseas CorporationFor a motor vehicle
US4986098 *Aug 5, 1988Jan 22, 1991Rockwell Automotive Body Components (Uk) Ltd.Vehicle door latches and locking mechanism
US7320495May 13, 2004Jan 22, 2008Kiekert AgMotor vehicle
US8739466Jun 30, 2010Jun 3, 2014Durban AbEmergency opening system for vehicle door or window
US8746756 *Dec 15, 2009Jun 10, 2014Control Solutions LLCVehicle door switch actuation system
US20110144868 *Dec 15, 2009Jun 16, 2011Control Solutions LLCVehicle door switch actuation system
WO2001012925A1 *Aug 17, 2000Feb 22, 2001SouthcoDouble console latch
WO2004103749A1 *May 13, 2004Dec 2, 2004Kiekert AgMotor vehicle
WO2006024264A1 *Aug 18, 2005Mar 9, 2006Kiekert AgCombined closing device
WO2011000884A1 *Jun 30, 2010Jan 6, 2011Cede Group AbEmergency opening system for vehicle door or window
Classifications
U.S. Classification292/11, 70/280, 70/262, 292/216
International ClassificationE05B65/12, E05B65/20
Cooperative ClassificationE05B83/38, E05B81/20
European ClassificationE05B83/38, E05B81/20