US2189992A - Automobile door lock - Google Patents

Description

Feb. 13,1940. H, A, PEARCE 2,189,992

AUTOMOBILE DOOR LOCK Filed Oct. 20, 1957 6 Sheets-Sheet 1 INVENTOR. Hcnr'y A. rPea rcC ATTORNEY. S

-Feb. 13, 1940. H. A. PEARCE AUTOMOBILE DOOR LOCK 6 Sheets-Sheet 2 Filed oct. 2o. 1957 1N VENT OR. Hen r'y A, Pearce/ BY 75m f ATTORNEY. 5

Feb. 13, 1940. H A PEARCE 2,189,992

AUTOMOBILE DooR LOCK Filed Oct. 20. 1957 6 Sheets-sheet s f r ff 4a I 5'/ v I| Fig.

6/ l I NVENTOR F1310. 1 Henry earce ATTORNEY.$

Feb. 13, 1940. H, A. PEARCE Y 2,189,992

' l AUTOMOBILE Doon Loox Filed Oct. 20,` 19557 6 Sheets-Sheet 4 INVENTOR Henry 'Pe/a rce.

9 H. A. PEARCE 2,189,992

AUTOMOBILE DOOR LOCK Feb. 13, 1940.

Filed Oct. 20, 1937 6 Sheets-Sheet 5 Henry Hipaa rce.

ATTORNEKS Feb. 13, 1940. H. A. PEARCE AUTOMOBILE DOR LOCK `Filed Oct. 20, 1937 6 Sheets-Sheet 6 INVENTOR Hem" X). @an rce ATTORNEYS Patented Feb. 13, 1940 PATENT ori-ICE AUTOMO1ILE DOOR LOCK Henry A. Pearce, Detroit, Mich., assignor to Ternstedt Manufacturing Company, Detroit, Mich., a corporation oi' Michigan Application October 20, 1937, Serial No. 170,069

9 Claims.

This invention relates to an automobile door lock and in particular to improvements in an automobile door lock of the toggle type.

The most customary automobile door lock used at present comprises a sliding bolt which is projected by a convolute spring. As the sliding bolt is retracted by rotation of the outside door han- 4dle and rollback, the bolt spring is ,loaded or compressed. Since retraction of the latch bolt is a necessary preliminary to opening the door,

' the more force required to retract the bolt, the

more difficult it is to open the door.

It is the object of this invention to produce an automobile -door lock having a bolt which can be retracted more easily than the sliding bolt in the above-mentioned, conventional latch and in particular', to produce a latch having a bolt which can be retracted without compressing the bolt spring. This object has been achieved by combining the sliding latch bolt with va toggle which can be easily swung over center to permit full retraction of the latch bolt and without compressing 'the bolt spring.

In the drawings:

Fig. 1 is a horizontal sectional view through a portion of the door and the body pillar showing the door closed and latched.

Fig. 2 is a section along the line 2-2 of Fig. l. Fig. 3 is a horizontal sectional view through the latch showing the latch bolt and straightened toggle, the latch bolt being retracted half way whichis then limit of the bolt retraction when the toggle is straightened.

Fig. 4 isa view showing the bolt fully re'- tracted with the toggle broken. y

Fig.5 is an elevation of the lo'ck with the toggle broken and the bolt fully retracted.

Fig. 6 is an elevation of the lock4 with the toggle lparts omitted showing the lock, when the door is open, locked vs. operation from the outside except by means of a key.

Fig. 7 is a section along the line 1 -1 of Fig. 2.

Fig. 8 is a detail of the locking slide.

Fig. 9 is a detail of the bolt. g

Fig. 10 is a detail of one of the cams for automatically unlocking the outside push'button.

' Figpll is a detail of the toggle tripping lever.

Fig. 12 is a detail of the remote handle operated retractor and cam for breaking the toggle.

Figs. 13, 14 and 15 are fragmentary sectional Fig. 16 is a` horizontal sectional view through p the door and body pillar sh Iatched position.

owing the door in .8 is provided with a shoulder Il.

(Cl. 'l0-150) Fig. 17 is an inside elevation of the latch and remote handle.

Fig. 18 is an outside fragmentary elevation of the body pillar and door showing the outside doorhandle and push button. 5

Fig. 19 is a view showing how the retraction of the bolt in the closing of the door automatically unlocks the lock.

Fig. 20 is a view showing the locking slide plate m raised or iocking position with the door dosed. 10

Referring more particularly to the drawings there is shown an automotive vehicle door I and a body pillar 2. The door has aiilxed thereto the outside door handle Il.4 The iixed outside door hahdle 3 is provided with a cylindricalropen- 15 ing 4 in which is mounted a cylindrical sleeve 5. 'I he sleeve 5 is provided with a slot 6 which receives the end of the screw pin 1. The pin 1 and slot 6 permit theA cylinder sleeve 5 to slide longitudinally in the opening 4 but prevent turn- 20 ing of this cylinder sleeve in the opening.

A lock cylinder or plug 8 having a push but-` ton head 9 is slidably and rotatably mounted within the cylinder sleeve 5. The lock cylinder 8 is of the pin tumblertype and can be rotated from without the vehicle by a key I0. The cylinder 8 and rollback I1 are always rotated from within the body when the lever 53 is operated to raise or lower the plate I8. The lock cylinder A compression coil spring I2 is mounted over the reduced end I3 of the lock cylinder 8 between the shoulder II and bracket LIl which is iixed to the selvage plate I5 of the lock frame I6. The bracket I4 serves as a support bearing for the 35 rotary rollback I'I. The `rollback I1 is `provided g with a square opening-I8 into which iits the re' duced end I3 of. the cylinder B which is also of square cross section.

The lock frame I6 is `fixed to the door by the 40 bolts I9. The bolt is shown in Fig. 9 and comprises a bolt head 20 and a bolt plate 2| which is provided with the elongated openings 22. The bolt head and plate are mounted for rectilinear sliding movement on the frame I6 by means of 45 the headed bolts 23 which pass through and slidably engage the plate 2| in the openings 22 and are screwed into the latch frame I6. The bolt head is also `guided in the opening 424 in the 'selvage plate I5.

pivotally connected to one end of the toggle lever 28 yby the pin 29. The vother end of the toggle lever 28 is pivotally connected to the slide 30 by the pin 3 The slide 30 is'slidably mounted within the housing 32 which is fixed to the latch frame I6. The compression coil spring 33 is mounted between the slide 30 and the housing 32 and normally tends to maintain the slide 30 in projected position.' as shown in Fig. 4.

For retaining the slide 30 within the housing 32, the housing 32 is provided with an elongated slot 34 'which slidably receives the screw pin 35 which is screwed into the slide 30. A torsion spring 36 is also carried by the pin 26. One end 31 of the torsion spring acts against the toggle 21 and urges the toggle over center toward made position, as shown in Fig. 3. The other end 38 of the spring abuts against the bolt head 20. Thus, in made position the pin 29 of the toggle, as viewed in Fig. 3, is over center, orslightly above a line passing through the axes of pins 26 and 3|.

As shown in Fig. 1, the pin 26 pivotally supports the tripping lever 40 (Fig. 11) for the toggle. One end of the tripping lever 40 is provided with a linger 4| which engages behind the pin'29. The nger 4| is thus positioned between the pin '29 and the remote handle retracting slide 43. The

remote handle slide 43 is provided with a cam lug 44 which is arranged to slidably engage the ringer 4| upon the retraction of the plate 43 to swing the tripping lever 40 clockwise about the pin 26 as sliding contact with the locking plate 48.

viewed in Fig. 3. A spring 45 is positioned between the pin 26 and the bolt plate 2| and overlaps the tripping lever 40 as at 46 to normally urge the tripping lever counterclockwise, as viewed in Figs. 3 and 4, into engagement with the remote retractor plate 43.

The other end 42 of the tripping lever 40 has a The locking plate is shown in detail in Fig. 8. The locking plate is a stamping generally U shaped in section comprising side walls and |0i and a front wall |02. The locking plate 48 is slidably mounted upon the latch frame I6 by means 0f the headed screws 49 which pass through and slidably engage the wall |00 in the elongated slots 50. The front wall of the plate 48 is provided with an opening |03 through which the bolt projects, Fig. 3. The wall |0| isprovided with an opening which receives the rollback I1. The rollback |1 engages the wall |0| in the mouth 52 of the opening 5| to raise and lower the lock plate 48. The plate 48 can also be raised and lowered from the inside of the c'ar by the usual lever 53.

Wall |00 of the plate 48 is provided with projecting lugs 54 and 55. When the plate 481s in raised position, as shown in-Fig. 6, the lugs 54 and 55 engage under the end 42 of the tripping plate 40. This prevents the tripping plate 40 from swinging clockwise about the pin 26, as viewed in Figs. 1 and 3, and the push button 9.

. cannot be pushed inwardly to swing the tripping lever 4.0 clockwise about the pin 26. Thus, the lock is locked against operation from the outside except by means of the key |0. By turning the key l0 the cylinder 8 and rollback |1 can be swung counterclockwise to lower the plate 48 from the position shown in Fig. 6 to that shown in Fig. 2. This removes the lugs 54 and 55 from beneath the tripping lever 40 and when the push button.9 is pushed inwardly against the tension of coil spring |2 the reduced end |3, which passes through opening 5| in Wall l0| ofthe plate 48, engages lever 40 and swings the same clockwise as viewed in Figs. 1 and 3 to break the toggle. As herein used toggie refers to the toggle levers 21 and 28 which are pivoted to each other as at 29 and to the bolt and slide by the pins 26 and 3| respectively.

When the locking slide plate 48 is in raised position, Fig. 6, to lock the lock against outside operation except by means of a key, the toothed edge 60 of the plate 48 meshes with the teeth 6| of the lock releasing member 62. The member 62 is provided with a pair of pins 63 which have a floating engagement with the lock frame I6 in the openings 64, Figs. 6 and 1'1. This permits the plate 62 to slide upon the frame I6. The plate 62 is also provided with a pawl 65 which interengages with a lug 66 on the slide plate 49. The latch bolt plate 2| has a cam lug 61.y

In Fig. 6 the lock is shown ln locked position, that is, the lugs 54 and 55 prevent operation of the tripping plate 40 by the push button 9. 'Ihus the lock at this time is locked within the meaning of the term locked as herein used. If the lock is locked while the door is in open position (Fig. 6 so illustrates the lock), then upon closing the door the bolt head 20 engages the cam face 68 of the rst section'69 of the striker. The cam surface 68 retracts the bolt, that is, slides it to the right as viewed in Fig. 6. At this time the cam lug 61 engages the cam face 10 of the tripping member 62 and since lug 65 interengages lug 66 on' plate 48, member 62 cannot move to the right and therefore cam lug 61 cams the member 62 downwardly. Fig. 19 shows the lockv in the process of being automatically unlocked with the lock parts in positions intermediate those shown in Figs. 6 and 2. As the plate 62 moves downwardly, it moves the plate 48 vertically downwardly until the snap over center spring 1| throws the plate 48 to its completely lowered and released position, shown in Fig. 2. The snap over center spring 1I, which has one end connected to the frame I6 and the other to the plate 48,

upon snapping over center releases the teeth 6| from teeth 60 and pawl 65 from lug 66 which permits the plate 62, upon further retraction of the bolt 2|, to travel with the bolt. Thus, lf the lock is locked while the door is open, in closing the door the striker section 69 retracts the bolt and the cam lug 61, acting through plate 62, lowers the locking'plate 48 and removes the lugs 54 and 55 from beneath the tripping lever 40. This unlocks the lock and again permits one to retract the lock bolt by pushing in on the button 9.

The latch is provided with a remote handle in the form of a bell crank lever 15 pivotally mounted on the door as at 80. A link 8| is pivotally connected as at 82 to the bell crank lever 15 and as at 83 to the remote retractor plate 43.

The latch bolt striker consists of three parts 69, 84 and 85 which are backedvup by the compression springs 86, 01 and 88 respectively. The keeper parts 69, 84 and 85 are slidably retained in the opening 90 in the body pillar 2. The opening 90 is provided with the guide ange 9|. The ange 9| permits the keeper parts 69, 84 and 85 to slidek transversely of the pillar 2, as shown in Figs. 1 and 2, but positively prevents any vertical sliding movement by these keeper parts. 'Ihe Ikeeper part 84 is provided with a shoulder 92 which engages the recessed corner 93 of the keeper part 69. The keeper part 85 is provided with a shoulder 94 which engages with the recessed corner 95 of the keeper part 84. The keeper part 69 is provided with a recess 96 which receives the part 91 of the pillar 2. The recess sarily follows that when the door is closed and locked, the bolt cannot be retracted by operation of the remote handle unless the lever 53 is iirst raised to lower or release the undogging plate 48. Thus the latch bolt is actually dead locked.

I claim: f1. A door latch comprising in combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle operatively connected to said bolt and latch frame whereby the said toggle when made holds said latch bolt projected, a keeper adapted for interengagement with said bolt when the bolt is projected, resilient means associated with said keeper adapted to be compressed by the said projected bolt when interengaged with the keeper, and tripping mechanism for throwing the toggle over center when the bolt and keeper are interengaged whereby the force of the said resilient means breaks the toggle and retracts the bolt to disengage the bolt and the keeper to permit door opening.

2.` A door latch comprising in combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle having one end pivotally connected to said bolt and the other end pivotally mounted on the said latch frame, a resilient keeper adapted for interengagement with said bolt when the bolt is projected, resilient means associated with said keeper adapted to be compressed by the said projected bolt when interengaged with the keeper, and tripping mechanism for throwing the toggle over center when the bolt and keeper are interengaged whereby the force of the said resilient means breaks the toggle and retracts the bolt to disengage the bolt and the keeper to permit door opening.

3. A door latch comprising in combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle having one end pivotally connected to the said bolt and the other end pivotally and reciprocably mounted on 'the said latch frame, the said toggle when made being retractable with the said bolt when the bolt is retracted by the keeper in the closing of the door, a keeper adapted for interengagement with said bolt when the bolt is projected, resilient means associated with said keeper adapted to be compressed by the said projected bolt when n interengaged with the keeper, and tripping mech anism for throwing the toggle over center when the bolt and keeper are interengaged whereby the force of the said resilient means breaks the toggle and retracts the bolt to disengage the bolt and the keeper to permit door opening.

4. A-door latch co`mprising in combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle having one end pivotally connected to the said bolt and the other end pivotally and reciprocably mounted on the said latch frame, resilient means operatively connected to said other end of the toggle and adapted to act through said toggle to project said bolt, the said toggle when made being retractable with the said bolt when the bolt is retracted by vthe keeper in the closing of the door whereby the said above mentioned resilient means for projecting the bolt is compressed, a keeper adapted for interengagement with said bolt when the bolt is projected, resilient means associated with said keeper adapted to be compressed by the said projected bolt when interengaged with the keeper, and tripping mechanism for throwing the toggle over center when the bolt and keeper are interengaged whereby the force of the said resilient means breaks the toggle and retracts the bolt to disengage the bolt and the keeper to permit door opening.

5. A door latch comprising in combination a latch frame, a reciprocable latch bolt slidably mounted on the said frame, a toggle having one end pivotally connected to the said bolt and the other end pivotally and reciprocably mounted on the said latch frame, a spring operatively connected to the said other end of the toggle and adapted to act through said toggle to project said bolt, the said toggle when made being retractable With the said bolt when the bolt is retracted by the keeper in the closingv of the door whereby the said spring is compressed, a keeper over which the said bolt rides in the closing of the door adapted for interengagement with the said bolt when the bolt is projected and the door closed, a plunger associated with the said keeper and adapted to be depressed by the said bolt when interengaged with the keeper, a second spring for backing up the said plunger and adapted to be compressed by the said projected bolt when interengaged with the keeper, a tripping lever pivotally mounted on the said bolt adapted when swung to engage the toggle lever and throw the same over center whereby the force'of said springs breaks the toggle and retracts the bolt to disengage the bolt and keeper to permit `door opening.

6. A door latch comprising in combination a latch frame, a reciprocable latch bolt slidably mounted on the said frame, a toggle having one end pivotally and reciprocably mounted on the said latch frame, a spring operatively connected to the said other end of the toggle and adapted to act through said toggle to project said bolt, the

said toggle when made being retractable with the said bolt when the bolt is retracted by the keeper in the closing of the door whereby the said spring is compressed, a keeper over which the said bolt rides in theclosing of the door adapted for interengagement with the said bolt when the bolt is projected and thedoor closed, a plunger asso- `ciated with the said keeper and adapted to be and keeper to permit door opening, and a push button mounted on the outside of the door operatively connected` with said tripping lever. and actuatable to swing the said lever to ca use retraction of the said latch bolt.

'7. A door latch comprising in combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle having one end pivotally connected to the said bolt and the other end pivotally and reciprocably mounted on the said latch frame, a spring operatively connected to said other end of said, toggle and adapted to act through said toggle to project said bolt, the said toggle when made being retractable with the said bolt when the bolt is retracted by the keeper in the closing of the door whereby the said first mentioned spring for projecting the bolt is compressed, a stop for limiting the retraction of said straightened toggle and bolt, a keeper adapted for interengagement with said bolt when the bolt is projected, a spring associated with said keeper adapted to be compressed by the said said spring breaks the toggle and retracts the bolt to disengage the bolt and the k'eeper to permit projected bolt, when interengaged with the keeper and retraction of said toggle and bolt is arrested by said stop, and tripping mechanism for throwing the toggle 'over center when the bolt and keeper are interengaged whereby 4the force ofthe door opening.

8. A door latch comprising in` combination a latch frame, a retractable and projectable latch bolt mounted on said frame, a toggle operatively connected to said bolt andV latch frame whereby the said toggle when made holds said latch bolt projected, a keeper adapted for interengagement with said bolt when the bolt is projected, resilient means associatedwith said keeper adapted to be compressed by the said projected bolt when interengaged with the keeper when the toggle is made, tripping mechanism for throwing the toggle slightly over'center whereby when the bolt and keeper are interengaged and the bolt is freely retractable the force of the resilient means breaks the toggle and retracts the bolt to disengage the bolt and keeper to permit door opening. and blocking means adapted to be set and released, said blocking means when set serving to block retraction of the bolt by said resilient means when the bolt and keeper are interengaged.

` said projected bolt when the toggle is made and.

when the bolt is interengaged with the keeper, tripping mechanism for throwing the toggle over center whereby when the bolt and keeper are interengaged and the toggle is made the force of said resilient means breaks the toggle and retracts the bolt, blocking means adapted to be set and released, said blocking means when set serving to block retraction of the bolt by said resilient means when the bolt and keeper are interengaged and said blocking means when set and the bolt and keeper are disengaged as when the door is open being releasable by the bolt as it is retracted by -the striker in closing\the door.

HENRY A. PEARCE.

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