Patent GB-1432817-A (GB)
Title: Locking device incorporating a lock case an escutcheon housing and  a door handle
IPC: E05B59/00
Filed: 1973-09-26
Abstract: 1432817 Locks GKN-STENMAN AB 26 Sept 1973 45184/73 Heading E2A A locking device comprises a lock case 2, an escutcheon housing 3 and a door handle 4, the lock case including therein a spring- biassed bolt 5 operable by a spindle 10 in co-operative engagement with the handle 4, a cylinder lock mechanism to effect locking of the spring bolt and 'being substantially contained in the escutcheon housing, and a dead lock mechanism including a dead bolt 7 operable separately from the spring bolt; there are means in the escutcheon housing co-operating with the cylinder lock mechanism for releasing the door handle from the spindle 10 upon latching of the spring bolt. As shown in Figs. 1 and 2, the spring bolt 5 is operable by turning of the handle 4 via a follower 16 and against the action of a spring 17, a latch pawl 6 being also actuated via a bolt hook 19 and a link 18. The dead bolt 7 is actuated by a key insertable into a key hole 8 via a bolt disc 21, but preferably by spring actuated tumbler levers 22, a bolt arm 23, a latch arm 24 and a bolt hook 25. The lock cylinder 9a operates a follower 31 which via, a pin 31c, actuates a bolt 32 arranged to move a driver element 33 into and out of a recess 10a in the handle spindle 10 to interconnect or disengage the handle and spindle; the handle has a notch such that when excessive force is applied the handle is sheared off. The bolt 32 has a slot 32a which interacts with a pin 34a on a cover plate 34 whereby the latter, upon upward movement of the bolt and consequent removal of the element 33 from the recess 10a, pivots to cover the keyhole 8. A bolt 38 actuated by a spring 37 has a hook member 38a for engagement in a recess 31b in the follower 31 and a projection 38b guided in a recess 39a and engageable in a lateral portion of the recess. In a modification, the dead-bolt 7 is operated from inside the door by a handle (61), Figs. 5 and 7 (not shown), carried on a spindle (48) and from outside the door by a cylinder lock (46) access to which is by way of a removable cover plate (51); means (56), (57) indicate, through a window (52), when the door is bolted from the inside. The follower 31', Fig. 6, operable via the cylinder lock 9'a, has teeth 31'a which mesh with teeth on the displaceable slide 32' carrying the driver member 33' for engagement with the spindle 10' of the handle 4. An escutcheon on the inside of the door is associated with a handle 61, Fig. 9, by means of which both the dead-bolt and spring bolt may be operated; located on the spindle 48 is a follower 65 which actuates a spring-loaded pivoted arm 67 having a toothed segment 69 meshing with a toothed segment 70 carried by the spindle 10', the arm interacting with a catch member 72 which holds the follower in either of its two rest positions. Actuation of the handle 61 initially moves the dead-bolt (7') via meshed toothed segments (80), (81) Fig. 11 (not shown), to the release position and, afterwards the spring-bolt. In a further modification, the dead bolt is actuated from inside and outside of the door by separate cylinder locks.