| 摘要 |
1,163,827. Lock nuts. AMERICAN OPTICAL CORP. 21 April, 1967 [8 Sept., 1966], No. 18600/67. Heading F2H. Means for locking a rotatably adjustable screw 17 in a rotatably adjusted position comprises a nut 19 on the screw, the nut having slots 20, 21 extending into the body of the nut so that the connected parts separated by the slots may be flexed relative to each other about the connections, means being provided for causing the parts to be so flexed to cause binding of the threads of the screw and the nut preventing relative rotation. The screw 17 is integral with a spindle 16 held in a cap 10 by a set screw 18 and rotatable by means of a knurled handle 13 on the cap 10. The nut 19 is carried by a sleeve 22 having external screw threads 25 on which is mounted a lock nut 26. The lock nut 26 is turned by rotation of a lever 30 held on the lock nut 26 by a set screw 31. The lock nut 26 bears on a pair of semi-circular members 27 having fingers 28 projecting through slots 24 in the sleeve 22. The fingers 28 bear on an inner sleeve 29 engaging the slotted part of the nut 19. Thus by turning the lever 30 and thus the lock nut 26, in one direction, the inner sleeve 29 can exert pressure on the nut 19 to cause it to bind on the threads of the screw 17, this locking action being releasable on rotation of the lever 30 in the opposite direction. The mechanism is described as being of use in the adjustment of the stroke of a piston pump where one end of the screw 17 serves as limit stop for the piston movement. To this end the outer surface of the sleeve 22 may be calibrated along its length and the cap 10 may have a transparent portion 11 with a vernier scale (not shown) marked round its rim. |
