US1568353A

US1568353A - Automobile door latch

Info

Publication number: US1568353A
Application number: US650309A
Authority: US
Inventors: Roland L Tullis
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-07-09
Filing date: 1923-07-09
Publication date: 1926-01-05
Anticipated expiration: 1943-01-05

Description

Jan. 5 1926. 568,353

- R. L. TULLES AUTOMOBILE DOOR LATCH Filed July 9, 1.923

96 r L7 1 O l 57 Fok/Jl Tu Ms;

Patented Jan. 5, 1926.

PATENT OFFICE.

ROLAND L. TULLIS, OF MONROVIA, CALIFORNIA.

AUTQMOBILE DOOR LLATCH.

Application illed July 9,1923. Serial No. 650,309.

T all whom it may concern.'

Be it known that I, ROLAND L. TULLIS, a citizen of the United States, residing at Monrovia, in the county of Los Angeles and State of California, have invented new and useful Improvements in Automobile Door Latches, of which the following is a speci: ficati'on.

My invention relates to door latches, and

more particularly to door latches applicable to motor vehicles. .l f

The primary object of my invention is to provide an automobile door latch which is so constructed as to hold the door closed in l5 such fashion as to obviate vibration and rattle. i

Another object of my invention is to provide a latch in whichthe bolt isl automatically held in withdrawn position when retracted, as in opening a door, and automatically released and advanced when the door is completely closed.

With the foregoing objects in view, to#` gether with such other objects and advantages as may subsequently appear, my mvention resides in the construction and features illustrated in the accompanying drawings, in which Figure 1 is a view in side elevation, and partly in section, of my latch applied to a door, showing the' door in closed position.

' Fig. 2 is a cross sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a top plan view, partly 1n section, of my invention as applied to an automobile door, showing the door .in closed position. Y

Fig. 4 4-4 of Fig. 1. v

40 Fig. 5 is a top plan view, partly in section, showing a modified formvof handle..

Flg. 6 is a cross sectional v1ew on the luie 64-6 of Fig. 5. y

More specific-ally, 7 and 8 indicate the slde is a cross sectional view of the line frame, which arrangement is the usual form of vauto door construction. `Mounted be-V tween the door frames and secured' to the outside door frame 7 is the latch bolt mechanism 12, which comprises a 'flat plate`13 provided with screw holesl for the reception of screws 14'for attaching'the plate to the-door door frames, and 9 the top section of the.

frame. Formed integral with the plate, and extending inwardly ltherefrom is a cylindr1cal casing 15 open at its forward end and 55 closed at the rear by a Wall 16. Mounted for slidable movement within the casing is a latch bolt having a rounded head 17 at its forward end; the rounded head is rcduced towards the rear to form an annular shoulder 18 from which shoulder a cylindrical portion 19 extends rearwardly.

The latch bolt is mounted and attached to a rod 42O, provided with an enlarged head 2,1 having an annular groove or recess 22, receiving a pin 23 whicli passes through the walls of the cylindrical portion 19 of the bolt, and is secured thereto in any desired manner. Thus the bolt is secured to the rod and is held against lateral movement within the casing but is free to turn. AEncirclin the rod 20 and bearing against the rear en of the cylindrical portion 19 and the rear wall 16 of the cylinder is a spiral spring 24, whichspring exerts a pressure against the cylindrical end portion of the bolt to force the bolt outwardly. The rear end of the rod 20 has an elongated slot 25 which is adapted to be engaged by and ride upon a pin 26 carried on and secured to the handle 27 in any desired manner, the handle 27 being pivoted at its lower end to the plate 13 at 28, the upper end of handle extending upwardly through a slot provided inthe upper edge of the door. The cylinder on its circumference' toward the inner side of the door, is provided with a pivoted dog 29, the dog being mounted on a pivot pin 30 which is journaled into lugs 32 formed integral with the casing 15. To hold the dog under strained tension, the leaf spring 33 is provided, being attached "to the inner side of the casing by a screw as at 34 or in any desirable manner. Under the tension of the spring the dog, when free to move, is adapted to engage the shoulder formed on the latch bolt, and as is more clearly shown in Fig. 5, tohold the bolt in retracted position. For-receiving the end of the bolt when the door is in closed position a plate is provided having a depressionor socket 36, and is attached to the body frame. The plate 35 on its side toward the inner part of the frame is provided with an outstandinglug sides of the doorV frame, the handles being connected by a shaft 39 whichlyis journale in bearings 40, the shaft having securely attached thereto Ya bifurcated arm 41. In the outer extremities of the bifurcated arm are provided apertures through which a pin is inserted, the pin passing through an elongated slot of the rod and is secured to the bifurcated arms in any desired manner.

In the operation of my latch bolt, to retract the bolt, the hand lever is pulled rear wardly swinging on its pivot, and through the rod pulling the bolt head out of its socket against the action ofthe spring. The handle is pulled back until the bolt has cleared the plate and socket mounted on the frame, at which time the spring acting upon the dog forces the inner end of the dog into engagement with l the shoulder formed on the bolt, when the door may be opened, the bolt being held in retracted position.

Upon closing the door or swinging it to its innermost position and the dog and bolt head will pass by the frame and socket plate luntil the outer end of the dog strikes against the lugA formed on the plate, thereby swinging the inner end of the dog outwardly from engagement with the shoulder, whereby the bolt is forced outwardly by the action of the spring into engagement with the socket. The socket conforms to the shape of the bolt 'head so that when the head is shot into the socket a snug engagement is formed.

Since there is a constant iiexingv or sprin ing in the frame and bod of an automobi e which is transferred to he doors, there is also constant'wear` upon the latch bolts of,

the usual type of construction. This objection is overcome by the present boltl which rotates in its bearing to compensate for such movement and thereby prevent unequal wear.

While I have shown and described a specitic embodiment of my invention, I do not limit myself to the exact construction shown, but may elnploy such changes and modications inthe construction and arrangement of parts as come within the scope of the appended claims.

I claim p 1. In a door latch, a bolt, a casing in which said bolt is mounted for rotary and longitudinal-movement, a spring for advancing said bolt, means for manually retracting said bolt in opposition to said spring, an annular shoulder on saidV bolt, a spring pressed dog carried lby saidcasing engageable with said shoulder to hold the bolt in a retracted position, a socket adapted to receive the outer end of said bolt, and means operable being formed with a rounded head, aspring f `tor advancing said bolt, manually operable means for retracting'said bolt, a rounded socket adaptedY to receive said rounded head when rsaid bolt is in its advanced position, and means for holding said bolt in Vits retracted position operable to Yrelease said bolt on moving the bolt laterally to a position opposite said socket. a y

3. In a door latch, a bolt, a spring for advancing said bolt, manually operable means for retracting said bolt, a socket adapted to receive said bolt when in its advanced osition, a cushion lining in said socket w1thin which cushion lining the end of the bolt is received, and means for holding said bolt in its retracted position operable to release said bolt on moving the bolt laterally t'o a. position opposite said socket.

4. In a door latch, a bolt formed with 'a rounded head, manually operable means for retracting said bolt, a spring for advancing said bolt, a rounded socket adapted to receive said rounded head when said bolt is in its advanced position, a resilient lining in said rounded socket within which lining the end of the bolt is received, and means for holding said bolt in its retracted position operable to release said bolt on moving the bolt laterally to a position opposite said socket.

5. In a door latch, a bolt mounted for rotary and longitudinal movement, said bolt being formed with a rounded head, a spring for advancing said bolt, vmanually operable means for retracting said bolt, a rounded lll socket adapted to receive said rounded head when said bolt is in its advanced position,'a resilient lining in said rounded socket, and means for holding said bolt in its retracted position operable tof release said bolt on moving the bolt laterally to a position opposite said socket. i

6. In a door latch, a cylindrical casin q cylindrical bolt slidably and turnily mounted in said casing, a spring in said casing for advancing said bolt, a rounded socket for receiving the end of said bolt when advanced, and means for holding said bolt in its retracted position operable to release the tary and longitudinal movements and means bolt on moving the bolt opposite said socket. for holding said bolt in its retracted position 7.' In a door latch, a bolt, a spring for adand operable to release said bolt on movl0 vancing said bolt, manually operable means ing the bolt laterally to a, position opposite v 5 for retractin said bolt,`a socket adapted to said socket. receive said golt when in its advancedr posil 1 tion, said bolt being mounted .for both ro- ROLAND L. TULLIS.