Patent GB-861002-A (GB)
Title: Tubular lock
Inventor: CHECK MATHIAS MICHAEL
IPC: E05C1/16
Filed: 1958-09-15
Abstract: 861,002. Securing knobs on shafts. YALE & TOWNE MANUFACTURING CO. Sept. 15, 1958, No. 29437/58. Class 80 (2). [Also in Group XXV] In a lock, Fig. 1, having an outside knob 20 and an inside knob 19 for retracting a latchbolt, and a turn button 45 associated with said inside knob 19 and rotatable to cause locking of said outside knob 10, the inside knob 19 is always free for rotation, and when rotated while said outside knob 10 is locked releases said outside knob 10 from locking, caused by said turn button 45, and effects retraction of said latchbolt. The outside and inside knobs 10, 19 are rotatably mounted in roses 11, 20, respectively, the knobs being retained therein by snap rings 13, 22, and the roses being assembled together by means of screws 24a co-operating with internally-threaded studs 25 ; the latter may be used for engaging and relatively locating a latch case 26 of the lock. Inserts 12, 21 of the knobs 10, 19 respectively are formed with bores 14, 23, in which is rotatably mounted a locking rod 15, Fig. 6, and the inserts 12, 21 are also formed with arcuate slots 16, 24, for receiving a spindle 17, Fig. 5, a lug 18 on the spindle 17 being bent to retain the latter in assembly with the knob 10; the slot 16 is complementary to the outer end of the spindle 17, which, in consequence will rotate with the knob 10 and the slot 24 is arcuately longer than the spindle 17 so that the knob 19, although it will rotate the spindle 17, has a lost-motion connection therewith. The turn button 45 is rotatably held in assembly with the knob 19 by means of lugs 47 on the turn button 45 which are passed through an opening in the knob 19 and then deformed outwardly and a square sleeve 43 on the turn button 45 fits over a square end portion 44 of the locking rod 15 so as to rotate it. A detent 27, Fig. 2, is pivotally mounted at 28 on a plate 29 which is provided with an opening 30 for the locking rod 15 and an arcuate enlargement 31 of the opening 30 for mounting the plate 29 on the spindle 17 so that it will rotate therewith. A lug 36 on the locking rod 15 respectively coacts with a cam surface 34 and a projection 35 on the detent 27 to either hold the detent 27 so that a notch 33 thereon is in engagement with one of the studs 25 and the knob 10 is thereby locked or to move the detent 27 inwardly away from said stud 25 to unlock the knob 10. When the turn button 45 is turned to cause locking of the knob 10 a lug 42 on the locking rod 15 is juxtaposed to an arm 41 provided on the insert 21 of the knob 19 so that turning of the knob 19 will take up the lost motion to rotate the locking rod 15 and the detent 27 to the unlocked position and then further rotation of the knob 19 will retract the latchbolt. The locking rod 15 is formed with a cam portion 39 and a slot 40 extending at opposed sides of the cam portion 39 for co-operation with a spring 37, the ends of which are located in slots 38 in the spindle 17, to bias the locking rod 15 on either side of a dead-centre position of the cam portion 39 to the locked or unlocked position of the locking rod 15 and to restrain the latter against longitudinal movement relative to the spindle 17.