US2231075A - Door lock - Google Patents

Description

Feb. 11, 1941. J. w. LAKIN 2,231,075

DOOR LOCK Filed July 1938 s Sheets-Sheet 1 INVENTOR. John Wlaia'n gm a ' ATTORNEYS Feb. 11, 19 41. J w LAKlN 2,231,075

DOOR LOCK F'l d Jul 22, 1938 1 e y 3 Sheets-Sheet 2 IN VENTOR.

J07z7z W L ak ATTORNEYS Feb. 11, 1941.

J. w. LAKIN 2 ,231,075

DOOR LOCK Filed July 22, 1958 3 Sheets-Sheet 3 INVENIOR. Jaizn WLQIHTL ATTORNEYS automobile door with the instant lock assembled Patented Feb. 11, 1941 UNITED STATES PATENT OFFICIE DOOR LOCK John W. Lakin, Detroit, Mich, assignor to Ternstedt Manufacturing Company, Detroit, Mich, a corporation of Michigan Application July 22, 1938, Serial No. 220,631

2 Claims. (01. 292-279) This invention relates to a door lock particular- H on the outside of the door lock pillar 15. The ly adapted for an automobile door. shaft l4 passes through and is journaled in the This invention'contemplates a door lock of portion l6 of the latch frame l2 which extends simple structure which obviates the need for an along the inside face of the door lock pillar l5. outside door handle which projects beyond the A ratchet I1 is fixed on the shaft l4 within the face of the outside door panel and which, when door and on the opposite side of the latch frame the bolt is released, will assist in throwing the from the bolt l3. Since both the ratchet I! and door open. bolt I3 are fixed on the shaft l4, rotation of the The inventionrelates to a door lockwith a bolt l3 correspondingly rotates ratchet l1. rotary gear bolt and in particular to the pawl and A torsion spring 18 has, one end I9 secured to push button control for the rotary gear bolt. the inner end of the shaft I 4 and the other end Inthe drawings: 20 secured to a lug 2| struck out of the latch Fig. 1 is an outside fragmentary elevation of an frame.

The gear bolt I3 is provided with a plurality of teeth22 and a lug 23. The torsion spring l8 normally tends to rotate the ratchet l1 and the and lock assembly. bolt l3 counterclockwise as viewed in Figs. 3 Fig. 3 is a vertical section through the rotary and 6. A stop lug 24 is struck out of the latch gear door bolt showing the body jamb pillar and frame and engages ratchet tooth 25 to arrest bolt keeper in elevation. counterclockwise rotation of the ratchet l1 and Fig. 4 is a front elevation of the keeper. bolt I3. In the closing of the door the rotary Fig. 5 is a front elevation of the lock disassemgear bolt l3 meshes with the rack keeper 5 which bled from the door. rotates the gear bolt l3 and ratchet l1 clockwise Fig. 6 is a vertical section through the door (Figs. 3 and 6) and causes the torsion spring [8 showing the lock in elevation as viewed from the to wind up.

right-hand side of Fig. 5. The bolt is undogged. When the rotary gear bolt is interengaged with Fig. 7 is a fragmentary horizontal section the keeper 5, counterclockwise rotation (Fig. 3)

through the door and body jamb pillar. of the rotary gear bolt is prevented by pawl Fig. 8 is a view similar to that shown in Fig. 6 26 interengaging one of the teeth 25 of the ratchet showingthe lock when the rotary gearbolt is in- II. The pawl 26 is pivoted by pin 21 to toggle terengaged with the keeper. lever 28. Toggle lever 28 is pivoted by pin 29 Fig. 9 is a view similar to Fig.3 but showing to toggle lever 30. Toggle lever 30 is pivoted the position of the parts just after the bolt has been undogged and disengaged from the keeper.

thereto.

Fig. 2 is a horizontal section through the door toggle cover plate 32. Loop spring 33 is mounted Figs. 10 and 11 are details of the sliding pawl between flange 34 of cover plate 32. pawl 26 and and toggle arrangement for dogging the bolt. toggle lever 28 and normally holds the pawl 26 Fig. 12 is a detail of the push-button control on against flange 35 of cover plate 32. Pin 21 is the inside of the door. I slidably guided in slot'36 in cover plate 32 and In the drawings there is shown a vehicle door slot 31 in part It of the lock frame l2. I and a body jamb pillar 2. The outside door A torsion spring 38 is mounted over pin 3| and panel is referenced 3 and the inside panel 4. has one end 39 engaged over flange 40 of cover The jamb pillar 2 is provided with a combiplate 32 and the other end 4| presses against nation dovetail socket and keeper. This keeper arm 42 of toggle lever 30. Thus torsion spring comprises a toothed rack 5 carried ,on a screw 38 normally tends to rotate toggle lever 39 coun- 3 which can be turned to adjust the rack inward-' tercloekwise, as viewed in Fig. 9, and to hold the ly and outwardly of the body along the face of toggle lever straightened, as shown in Figs. 6 the jamb 2.- A shoe I having an inclined face 9 and 10, that is, with pin 29 slightly to the left of is mounted opposite and above the rack mem-, a center line passing through pins 21 and 3|. bet 5 for sliding movement along the face of the: When the door is open, rotary gear l3 assumes jamb pillar inwardly and outwardly of the body. the position shown in the dotted lines, Fig. 3, The shoe I and rack 5 are mounted within the and the ratchet I1 is in the position shown in keeper housing 9 and secured to the jamb pillar Fig. 6 with tooth 25 against stop 24. In the by bolts l0. closing of the door eccentric lug 23 first engages The lock comprises an angle frame l2. A bolt the rack keeper 5 causing the gear bolt I3 to rol3 in the form of a gear segment is flxed on shaft tate clockwise, Fig. 3, as the teeth of the gear bolt on pin 3| which is fixed to the latch frame and mesh with the teeth of the rack keeper 5. This causes clockwise rotation of the ratchet H from the position shown in Fig. 6 to that shown in Fig. 8. As the ratchet rotates clockwise, torsion spring I8 is loaded and spring 33 causes pawl 26 to ride over and interengage the first of the ratchet teeth 25 and then ride over and interengage the second ratchet tooth 25, as shown in Fig. 8. At this time the door is closed and latched with the rotary gear bolt I3 interengaged with the keeper 5, as shown in Fig. 3. In the closing of the door the circular face 45 of the bolt l3 engages the inclined face 8 of the shoe I causing the shoe 1 to yield and slide inwardly or to the right, Fig. 3, with the bolt and at the same time hold the bolt in mesh with the rack keeper 5.

' Since, as shown in Fig. 8, the toggle 26, 30 is straightened, the pawl 26 positively prevents counterclockwise rotation of the gear bolt and prevents disengagement of the bolt and rack keeper.

Disengagement of the bolt is effected by breaking the toggle at the knee, that is, by moving pin 28 slightly to the right of center, as viewed in Fig. 11. This is accomplished from the outside of the door by a spring projected push button 46 having a lug 41 which, when the push button 46 is pushed inwardly, Fig. 11, engages the toggle at the knee and throws pin 29 to the right of center to trip the toggle whereupon the toggle and pawl permit counterclockwise rotation of the ratchet H by the loaded torsion spring I8. This causes the bolt l3 to roll out of engagement with the keeper 5 and throw the doorl open. As soon as the pawl 26 clears teeth 25, torsion spring 38 straightens the toggle and throws it to the position shown in Fig. 6 where, upon closing the door, the pawl 26 is again in position to interengage the teeth 25 of the ratchet to prevent counterclockwise rotation of the same.

Push button 46 comprises a plunger which can be rotated through 90 which places the lug 41 in the position shown in Fig. 6. In this position, even though the push button 46 is pressed inwardly, the lug 41 will not engage the toggle to release the pawl and thus the push button is ineffective to release the pawl. The push button is provided with a conventional key controlled cylinder lock for locking the plunger in either operative or inoperative position. The cylinder lock is made so that the tumblers in the key plug will prevent rotation of the plug only after the key plug has been turned to locked position and the key then removed. If the key plug is not turned to locked position, then the plug can be freely rotated even though the key is not inserted in the plug. In view of the fact that the key controlled cylinder lock is not covered by the claims or included as an element in the claims, it is believed that further explanation is not necessary.

When the door is latched, the pawl 26' can be released from within the car by means of push button 48 which is carried by the inside door handle 50. The inside door handle 50 serves only as a pull-to and therefore is fixed to the inside door panel 4. Push button 48, when depressed, acts through lever 5|, draft link 52 and bell crank lever 53 which engages arm 42 of toggle lever 30 to swing the toggle lever 38 clockwise, Fig. 8, to break the toggle. This renders dog 28 ineffective to prevent counterclockwise rotation of the ratchet and bolt whereupon torsion spring I8, acting through the rotary gear'bolt, throws the door open, as above described.

Lever 6| is supported on plate 54 by pin 65.

Torsion spring 56 has one end secured to the plate 64 as at 51 and the other end secured to the lever 5| as at 58. Torsion spring 66 tends at all times to rotate lever 6i clockwise, Fig. 12, and maintain push button 48 projected. Bell crank 5 58 is pivotally mounted on the latch frame by pin 60.

The latch can be locked from within the body by a push button and rod 6| which is connected to a sliding plate 62. Plate 62 is slidably supported on the lock frame by pins 63 and 64. Pin 84 is fixed to lug 61 and turned outwardly 90 from part l6 of the latch frame. A coil spring 65 and washer 66 are mounted between the head of the pin 64 and plate 62. Plate 62 is provided 15 with a hump 62 which engages either the upper or lower edge of lug 61. I'he coil spring 65 is at all times held under compression and thus frictionally holds the plate 62 against lug 61 and cooperates with lug 61 and hump 62' to retain 20 plate 62 in either raised or lowered position. The sliding plate 62 is connected at its lower end in enlarged slot 69 to the rotatable push button cylinder by pin 68.

When the door is closed, the outside push but- 25 ton can be rendered ineflective to unlatch the door by pushing downwardly on button 6| which slides plate 62 downwardly from the position shown in Fig. 8 to that shown in Fig. 6. As the plate 62 slides downwardly it acts through pin 68 to rotate the push button cylinder 90 and thus swing lug 41 so that it clears the toggle lever. If the push button is depressed when lug 41 is in the position shown in Fig. 6, the lug will not engage the toggle lever and thus the push button is ineffective to break the toggle and release the bolt iii.

of course, both when the door is open and when it is closed, a key can be inserted in the lock cylinder, and push button 46 turned to place (0 the lug 41 either in the position shown in Fig. 6, in which case the door will be locked, or in the position shown in Fig. 8 where the door is unlooked, that is, the push button 46 can be depressed to release pawl 26 from the ratchet.

If, while the door is open, push button BI is depressed to swing lug 4! to inoperative position, Fig. 6, then upon closing the door, as the bolt 13 rolls along the keeper 5, the ratchet I is correspondingly rotated which causes the cam lug I0 50 to engage flange II on plate 62 and raise the same from the position shown in Fig. 6 to that shown in Fig. 8. This automatically returns lug 41 to operative position where the push button 46 can be depressed to retract dog 26 and release the bolt i3. 8

The door is provided with an outside handle 12 which is fixed to the door and is non-rotatable.

I claim:

1. A door lock comprising a frame, a rotary bolt rotatable in one direction in the closing of the door and in a counter-direction in the opening of the door, a ratchet fixed to said bolt for rotation therewith, a pawl interengageable with said ratchet for dogging said ratchet against 65 counter-rotation, a toggle lever, a fixed pivotal connection between one end of the toggle lever and the latch frame, a slidable connection between the other end of the. toggle lever and the frame, a pivotal connection between the pawl and the slidable end of the toggle lever, resilient means tending to maintain the toggle in made position wherein the toggle is effectiveto dog the ratchet and bolt against rotation in door opening direction, and a rotatable push button in- 76 eluding a portion for contacting the toggle to break the same when the push button is depressed, the said push button being rotatable to another position to swing the said portion out of contact with the toggle whereby the push button is ineffective to break the toggle.

2. In combination with a door, a door look 01' the type having a toothed keeper, a rotatable gear bolt adapted to mesh with the keeper and be rotated in one direction in the elosing and in a counter-direction in the opening of the door, a ratchet fixed to said bolt for rotation therewith, a pawl for dogging said ratchet against counterthe door to release the said slidable member whenever the same is set while the door is open and render the push the pawl.

JOHN -W. LAKIN.

button efiective to release

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