US2795947A - Door locking device - Google Patents

Description

June 18, 1957 L. PERAS DOOR LOCKING DEVICE 2 Sheets-Sheet 1 Filed Feb. 2, 1954 l/lll MVr/W0@ UQlE/V PER/35 BM@ June 18, 1957 L. PERAS DOOR LOOKING DEVICE 2 Sheets-Sheet 2 Filed Feb. 2, 1954 ATTORNE Y United States Patent 2,795,947 DOOR LOCKING DEVICE Lucien Peras, Billancourt, France, assignor to Regie Nationale des Usines Renault, Billancourt, France Application February 2, 1954, Serial No. 407,625 Claims priority, application France February 13, 1953 1 Claim. (Cl. 711-141) The invention relates in general to a lock, which is particularly suitable for the locking of doors, luggage compartments or hoods of motor cars. The locking device forming the subject of the invention permits the opening and the closing, with automatic locking, of the door or of the compartment closure or hood, simply by pressing the member to be locked, there being no need to actuate a handle.

On the accompanying drawing:

Figure 1 shows a view, in cross section along the symmetrical plane of the car, of the lock mounted on the movable door of the rear luggage compartment;

Figure 2 is a view in the direction of the arrow Il (Figure l) of the same lock, with the latch bolt and its pin removed;

Figure 3 is a View in the direction of the arrow Ill in Figure 1 (latch bolt in locked position, full line, and in unlocked position, dot-and-dash line).

Referring to Figure 1, it will be seen that 1 represents the oor of the car, 2 the sheet-metal closure or door of the rear compartment, and 3 a stirrup bolted to the oor of the car. The reinforcing plate 5, for securing the lock, is welded to the interior lining 4, of the door 2. This reinforcing plate has an aperture 6 (see Figure 1). A latch-supporting plate 7 is secured by four bolts to the reinforcing plate 5, which has a special cut-away portion at the bottom, with two extensions 7l and 72 (Fig. 2), between which the stirrup 3 fits and is centered in the closed position (see Figure 3). The latch-bolt-supporting plate 7 has a circular aperture 8, into which can t a pin 9, actuated by the cylinder lock which will be described hereafter. A latch bolt 10, intended to engage with the stirrup 3, is cut out in the shape illustrated in Figures 1 and 3, and is articulated about the pin 11 secured in the plate 7. The axis of this pin is perpendicular to the hinge-line of the door. On this pin, there are mounted a friction washer 12, a spacer ring 13, a self-locking nut 14, and a hairpin spring 15 which, as shown in Figure 3, rests against a stud 19 riveted into the latch-bolt-supporting plate 7 and against the latch bolt 10 in such a manner as to tend to turn the latter- (see Figure 3) in a clockwise direction, i. e. in the opening direction. The spring 15 is wound with two turns around the pin 11, thus permitting rotation, with uniform friction, of the latch bolt 10 about the pin 11. At its upper end, the latch bolt 10 has two notches 16 and 17, limited by a shoulder 17h. The diameter of the aperture 8 and the height of the shoulder 17D are such that the pin 9 interlocks at the top of the aperture 8, preventing the shoulder 17b from escaping to the right (Figure 3). As shown on Figure 3, the pin 9 can rest, according to the circumstances, in the notch 16 or in the notch 17 of the latch bolt 10, which are connected by a cam surface as shown in the drawing.

The cylinder lock 20, of a known type, is secured in the door 2 by means of a clip 21, a sealing washer 2lb, and a resilient washer 18. The cylinder lock 20 has a flat portion at the point where it traverses the case of the door 2 so as to hold it against rotation. The plug -of the cylinder lock has at its end in the door 2 an eccentric cylinder 22 having a bearing in the latch-bolt-carrying plate 7 by means of a stud 23.

The pin 9 is carried by a lever 24 articulated about a pin on the plate 7. A spring 26 is wound several times rice round the body of the cylinder lock 20 and is hooked to the cylinder lock 20 and rests against the pin 9, constantly maintaining contact between the lever and the eccentric cylinder 22. The cylinder lock is actuated by means of a key which permits the cylinder 22 to be turned and the lever 24 to be raised. A clip 26b maintains the longitudinal spacing of the cylinder 22 from the cylinder lock 20 and the spring 26.

The lock operates as follows:

Figure 3 represents the lock in closed position. In order to open the lock, the key is inserted in the cylinder lock 20 and turned, which has the effect, by means of the eccentric cylinder 22, of causing rotation of the lever 24 about the pin 25. The pin 9 carried by the lever 24 is raised and thus releases the latch bolt 10 which, urged by the spring 15, moves into the position indicated in dot-and-dash lines in Figure 3. The shoulder 17b then abuts against the pin 9. The stirrup 3 is then released by the latch bolt 10 and the door 2 of the compartment can be raised. If the key is released or withdrawn, the spring 26 restores the lever 24 to its lower position and the pin 9 enters the notch 17 in the latch bolt 10, leaving it in the open position ready to receive the stirrup 3. If the door is now closed again, the stirrup 3 strikes against the bottom of the latch bolt, restoring the latch bolt 10 to the position illustrated in full lines in Figure 3. The pin 9, biased by the spring 26, passes from the position 17 to the position 16 as a result of the cam surface at this point on the latch bolt 10. The door is thus closed and automatically locked Without the need of any further operation.

This lock is characterized by a great simplicity of design. It is particularly suitable for the doors of luggage compartments or for the hoods of motor cars. The key used for opening it may conveniently be the same as the ignition key for the car or the key to the other doors giving access to the compartments reserved for passengers, luggage or goods.

I claim:

In a motor vehicle having a body and a member hinged thereto, a locking device for locking said member to said body, said device comprising, in combination, a supporting plate secured in predetermined position to the hinged member, a latch bolt articulated on said supporting plate about an axis perpendicular to the axis of the hinges of the member, a stirrup secured to the body of the vehicle for engagement with the latch bolt when the hinged member is closed, a key-actuated cylinder lock mounted in said member and having an eccentric cylinder member, a lever plate articulated on the supporting plate, a spring-urged pin carried by said lever plate and positioned to engage the latch bolt, said lever plate being positioned to be articulated by said eccentric cylinder member upon rotation thereof upon introduction and turning of a key in the cylinder lock, said latch bolt having an edge provided with two spaced-apart notches connected by a cam surface and said pin being positioned to engage with said notches and said cam surface, spring means normally urging said latch bolt toward said pin, and said latch bolt being provided with a recess for locking engagement with said stirrup upon closing of said member.

References Cited in the tile of this patent UNITED STATES PATENTS 1,937,520 Lightner Dec. 5, 1933 2,603,963 Allen July 22, 1952 2,608,428 Allen Aug. 26, 1952 2,658,778 Dall Nov. l0, 1953 2,680,639 Vigmostad lune 8, 1954 FOREIGN PATENTS 630,768 Great Britain Oct. 20, 1949

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