Patent GB-472041-A (GB)
Title: Improvements in and relating to tubular lock
IPC: E05B55/00
Filed: 1936-02-13
Abstract: 472,041. Door locks. YALE & TOWNE MANUFACTURING CO. Feb. 13, 1936, No. 4347. Convention date, Feb. 20, 1935. [Class 44] A door lock comprising a spring latch portion and a spindle portion separately inserted in tubular bores extending inwardly from the edge of the door and transversely through the door respectively, has means operable by a finger-piece on an inner knob for rendering an outer knob inoperative, and a barrel lock, housed in the outer knob, has a follower which becomes coupled to the spindle upon key actuation of the lock. Means for enabling the barrel lock to be readily removed by a joint manipulation of the inner knob and the key also are provided. An outside knob 13 has a tubular shank secured against axial movement within a rose plate 17 by a spring ring 72, Fig. 6. The rose plate 17 has extensions 17a connected by' screws 81 to a plate 82 on the inside of the door, this plate having a bayonet joint connection with the rose plate 16 of the inner knob. A spring catch on the plate 82 enters a notch in the rose plate 16 when the latter has been given a partial turn and the rose plate cannot be removed until the catch has been pressed back by a tool. The inner knob 14 is secured within the rose plate by a spring ring 92. A hollow spindle 25 is inserted through the outer knob 13 and has a continuous slot 60, Fig. 24, on one side into which is keved the inside knob shank 14a and the lock follower 26. The spindle 25 has an inclined slot 66 in which works a pin on a member 63, Fig. 28, fitting within the bore of the spindle. The member 63 has a slotted inner end to engage a flat strip 68, Fig. 6, connected to a finger-piece 15 on the inner knob 14 so that rotation of the finger-piece turns and reciprocates the member 63 to move two cams 62 and 80 carried thereon. When in the outer position, the cam 62, which works in a slotted end 61a of the spindle 25, forces two balls 77, Fig. 28, through holes 70 in the outer knob spindle into recesses 76 in the rose plate and the outer knob is immobilized. Simultaneously, two balls 79 are allowed to withdraw from two recesses 71 in the outer knob spindle through holes 69 in the spindle 25 which is thus freed from the outer knob. In the inner position of the member 63, the balls 77 and 79 are moved to release the knob 13 from the rose plate and couple it to the spindle 25. The finger-piece 15 has a ball catch on its spindle to hold it in its two extreme positions. Mounted in the knob 13 by a bayonet joint is a barrel lock 105 secured when in position by a spring-pressed bolt 122, Fig. 58, engaging with a recess in the knob to prevent relative rotation. The plug 108 of the lock is bored at its end to receive the reduced shank of a member 113 having a flat diametrical projection 114 and a radial pin 115. The pin 115 extends through a slot 117 in a sleeve 118 feather-keyed to the plug 108 and into a slot 116, Fig. 60a, in a tubular extension 116a of the lock 105. As the plug 108 and sleeve 118 are turned by the key, the slot 117 causes the member 113 to move towards the spindle 25 and the projection 114 engages the slot 61a in the spindle, and as the pin 115 clears the slot 116 in the fixed sleeve 116a, the member 113 is turned and with it the spindle 25 to withdraw the bolt. To remove the lock 105 at any time, the spindle 25 is turned through a right-angle by the inner knob so that the projection 114 can no longer enter the slot 61a. Rotation of the plug then causes a reverse movement of the sleeve 118 to push the bolt 122 from its recess, whereupon the lock 105 can be turned to uncouple the bayonet joint. The bolt section of the latch comprises a tubular member 12, Figs. 9 and 11, inserted through the edge of the door, and in it-slides a forked member 30 adjustably connected to a forked member 27 by a screw 33a. The member 27 has lateral abutments 28 engaged by a cam 26a on the follower 26. A plate 36 inserted through slots 37 in the tubular member 12 forms an abutment for a spring 38 bearing at its forward end against a partition 39 in the member 30. A weaker spring 42 surrounding a pin 40 urges a latch 10 outwardly but allows it to retract relatively to the member 30 as the door is closed. A hooked link 56 enables the latch to be withdrawn when the member 30 is moved by the follower 26. An auxiliary bolt 11 sliding in a stopped groove in the latch 10 is normally urged outwards by a spring 52 but when the door is closed the end of the bolt rests against the striking plate and remains retracted. A dead-locking lever 43 having a prong 46 engaged beneath the last turn of the spring 38 has an end 47 adapted to engage a recess 48 in the latch 10 when the auxiliary bolt 11 is in the retracted position. When the auxiliary bolt 11 is out, a projection 55 thereon engages a cam surface 47a on the lever 43 and prevents it from engaging the latch. When the latch is withdrawn by the follower, sufficient initial movement is permitted to enable a cam surface 49 on the partition 39 to engage a surface 49a on the lever 43 to raise it out of engagement with the latch 10.