Patent GB-1427088-A (GB)
Title: Door-festining means
IPC: E05B55/00
Filed: 1973-08-07
Abstract: 1427088 Door fastenings FICHET-BAUCHE 7 Aug 1973 [18 Sept 1972 28 March 1973] 37334/73 Heading E2A Door fastening means comprises, on a door, a latch bolt 93 and a plate bolt 14 which extends over a substantial height of the door, both bolts being movable between locked positions, for engaging the door frame or casing, and unlocked positions, and control means for actuating the bolts comprising at least one door handle 46, a cam 38 rotatable by the handle or handles to move the plate bolt between its locked and unlocked positions, and the handle or handles being also arranged to move the latch bolt to its unlocked position after the plate bolt has been retracted to its unlocked position. As shown, the cranked plate bolt 14 incorporates a lock 103 provided with a sliding bolt 102 and an aperture 34 the edges 35, 36 of which co-operate with the disc cam 38 integral with a securing disc 43, the discs having apertures 39, 44 for the reception of a spindle 45 carrying inner and outer door handles 46, 47. A plate 72 rotatably mounted on a surface 71 coaxial with the spindle 45 carries a pin 68 on which is rotatably mounted a lever 77 biassed in an anti-clockwise direction by a spring 81 and actuated by a key-operable lock 110; the plate incorporates a slot 91 in which is engaged a stud 92 of the spring- loaded latch bolt 93. With the bolt 14 engaged in a groove of the door frame, the sliding bolt 102 of the lock 103 is engaged in a groove 52 of the disc 43 whereby the door is maintained in a fastened condition and retraction of the bolt 102 by the use of a key of the lock 103 enables rotation of the discs 38, 43 by a handle 46, the cam disc 38 co-operating with the aperture 34 to withdraw the bolt 14 and to release the door; at this time, stop pin 54 on the door is not engaged with shoulder 55 of disc 43. Continued rotation of the handle and discs causes a stud 101 on disc 43 to co-operate with the plate 72 which rotates about the surface 71 whereby pin 92, engaging the end of the slot 105, retracts the latch bolt 93 against the bias of the spring 98 and thus enables opening of the door. The latch bolt 93 is immobilised, after retraction of the bolt 14, by returning the bolt 102 whereby the end 84 of the lever 77 engages the bolt 102 to prevent rotation of the handle 46 and therefore movement of the plate 72. However by the use of a key for a lock 110, a finger 111 is rotated in direction of arrow f 2  to co-operate with the bevel 86 of the lever 77 to pivot the latter clockwise about pin 68 whereby the end 84 is disengaged from the member 102 and the plate 72 can then be actuated by the handle 46 to withdraw the latch bolt 93. In a modification, the disc (201) has a projection (212), Fig. 12, (not shown), which directly co-operates with the latch bolt (217) as does the finger (224) of the secondary lock (223); the position of the disc (201) is ensured by a spring-loaded pin engaged in an aperture in a door panel. Means whereby the door may be adjusted vertically and horizontally comprises a block 304 having slots 305, 306 through which pass screws 308, 309 engaged in a base plate 312 secured to the door; a screw 319 engaged in the block has a channel 323 for reception of a retaining screw 324. The block is mounted on a pivot p have a base b on which the block rests.