Patent GB-841066-A (GB)
Title: Cylindrical lock
Inventor: KUBIK PAUL P
IPC: E05B55/00
Filed: 1957-10-29
Abstract: 841,066. Door locks. YALE & TOWNE MANUFACTURING CO. Oct. 29, 1957, No. 33681/57. Class 44. A lock comprises in combination a bolt 38, a slidable bolt retractor 12, a pair of angularly movable knob sleeves 15, 16 at opposite sides of the door respectively, the sleeves being angularly movable about an axis extending through the retractor and having surfaces 42, 34 adapted to impinge on the retractor to move the latter to a retracted position, means 27 for locking one of the knob sleeve 15 in a position corresponding to the thrown position of the bolt, said surfaces 42 of the knob sleeve 15 having on the thrown position of the bolt a limited freedom of movement relative to the parts 44 of the retractor with which they are adapted to cooperate and resilient means 32 for urging the knob sleeve 15 towards a normal central position, and the retractor in a duration corresponding to the thrown position of the bolt. The bolt 38 is contained in a cylindrical housing 37 which is connected to a two part housing 10, 11 for the spindles 15, 16 and the retractor 12 by ears 35; the bolt 38 is provided with a tail 40 which is engaged by parts 41 of the retractor. The bolt housing also contains a trigger, bolt 39. The retractor is guided in the housing 10, 11 by two plates 13, 14 each of which forms a bearing for mounting one of the sleeves 15, 16. The sleeve 15 which is the outside sleeve has a knob 17 fixed to it which carries lock mechanism actuated by a key 18 this mechanism moving a tongue 20 which rotates a short sleeve 21 contained.within the sleeve 15. The sleeve 21 has surfaces 43 which bear on the surface 44 of the retractor to retract it and hence the bolt when the key is turned. The inside sleeve 16 carries a knob 25 and slidably mounted in the knob is a push button 26 secured to means 27. When the knob is moved inwardly the means 27 enters a slot formed in the outside sleeve 15 and also enters a notch in the plate 14 to lock the outside sleeve against rotation. When in the locking position the means 27 is held against releasing-movement by a catch 28 which is slidably mounted inside the retractor. The catch 28 carries a pair of ears 30 each of which supports a centring piece 31 which is held against the ears by a spring 32 forming the resilient means. The springs 32 also serve to bias the retractor so that the bolt is normally in the thrown position. The centring pieces 31 bear against the surfaces 42 of the sleeve 15 and hold it in its normal central position in which there is a clearance between the surfaces 42 and the surface 44 of the retractor. These clearances serve to prevent the bolt being released by sharp blows applied against the outside knob 17. The centring pieces also act against the surfaces 43 of the short sleeve so there is a clearance between this sleeve and the retractor. In a modification instead of the surface 44 of the retractor being set back from the surface 33 against which the surfaces 34 of the sleeve 16 engage a single surface is provided and the surfaces of the sleeve 15 are set back to provide the clearance. The outside sleeve 15 is then maintained in its normal central position by a spring which is coiled about the sleeve and which has ears co-operating with a lug carried by one of the casing halves and a pin carried by the sleeve.