Patent GB-167448-A (GB)
Title: Improvements in or relating to locks or fastenings for the doors of vehicles
IPC: E05B83/36
Filed: 1920-12-08
Abstract: 167,448. Dandois et Cie, J. B. Aug. 5, 1920, [Convention date]. Double-bolt fastenings; latches, sliding; striking-plates.-In a fastening particularly applicable to securing motor-car and other doors, of the type in which sliding rods operated by a single handle are formed with hooked ends which are brought into engagement with fixed parts on the door frame, a spring bolt is fitted to retain the sliding rods in their withdrawn position as long as the door is open, said bolt being pressed back by the door on closing, to release the fastening which, after operation to secure the door, is held automatically against accidental release. These retaining devices may be combined with the mechanism for operating the rods, with a door-latching gear, or with a key-lock. Adjustable striking- plates may be fitted to receive the hooks. Fig. 3 shows one form in the position in which the hooks are withdrawn and the door open. The rods 1, 1<1> carrying the hooks 2 are blocked in releasing position by a spring bolt 3 engaging a notch 7 in the rod 1, thus securing the operating- handle 69, and hence also the rod 1<1>. When the door is closed, the bolt 4 is forced back by contact with the jamb, and the block is removed. The handle is then operated to draw the hooks into engagement with the parts 60, Fig. 5, on the striking-plates, in which position they are retained by a spring bolt 3<1>, having a bevelled end, engaging in a notch 7<1> in the rod 1<1>. This bolt is forced out of the notch when the handle is turned to release the fastening. In a modification, which is shown in the closed position in Fig. 15, the sliding rods 3 are operated through rack bars 4, 5 by a pinion 6 on the handle spindle 7. The racks are blocked by a spring-pressed hook 12 pivoted at 14, and by a bolt 17, which engage behind shoulders 16, 18 respectively. The handle is left with sufficient play to engage first a projection 21 on the hook 12, and move it back to release the block, so that further movement to release the fastening is then possible. The doorlatch, slam-latch, and locking mechanism employed in connection with this arrangement is shown in Fig. 7. The latch 30 has pivoted to it at 35 a piece 34 which normally rests upon a stop 36, and which, when the handle is turned, is engaged by the follower 39 and pushed back, taking the latch with it. While the door is still closed, the slam-latch 32 is pressed back, so that the follower 39 can pass a finger 46 on the slam latch-frame 31. A slight further movement of the follower causes it to press upon an enlargement 40 upon a sliding plate 41 which carries a wedge-ended piece 42 into engagement with a notch 43 on the main latch 30, and keeps it withdrawn so long as the turning effort upon the handle is maintained. This position is shown in Fig. 8. The upper and lower hook fastenings having simultaneously been released by the handle, the door can be opened, whereupon the slam latch 32 shoots out, and the finger 46 comes into the path of the follower 39 and detains it. A little lost motion, however, allows the follower 39 and the detent 42 to rise under the action of a spring sufficient to permit the main latch to 'be shot out again by its spring. When the door is closed it latches automatically, and the slam bolt, being pressed back, releases the handle for operation of the sliding hooks. The whole may be locked by a key-operated bolt-plate 27 which carries a blocking-plate 24, Fig. 15, into engagement with the shoulder 16 in the rack-plate 5. To allow for adjustment, the part 60, Fig. 5, with which each hook 2 engages, is mounted upon a plate 61 which is adjustably secured by screws passing through slots 65 into a supporting plate 62, upon which it can slide. The Specification as open to inspection under Sect. 91 (3) (a) describes a further modification, Fig. 18 (Cancelled), in which the sliding rods 18, 19 are operated through slotted plates 21, 22 by pins 24 on a disc secured to the handle spindle, and are blocked when shot by the nose 28 of a rocker 29 entering a notch 27 in the plate 22. A projection 32 on a cam-plate secured to the handle-spindle presses out the nose 28 at the commencement of the unlocking movement. The main latch 3 is withdrawn bv the engagement of the follower 14 with a spring-pressed pin 6 passing through holes in the latch 3 and also in the slam-bolt 10. Fig. 24 (Cancelled) shows the position when the door is opened. the follower 14 being then blocked by a projection 11 on the bolt 10 when both it and the main latch shoot out. When the door is closed, this block is removed, since the bolt 10 is pressed back by the doorframe, and the follower 14 can pass the pin 6 when operating the sliding rods carrying the hook fastenings. This subject-matter does not appear in the Specification as accepted.