Control Mechanisms for Connection Between Two Moving Elements to Control their Relative Movement.

摘要

1,179,314. Lirikwork; cams. A. Y. KIPNIS. 18 July, 1967 [18 July, 1966], No. 32847/67. Heading F2K. [Also in Division B3] A variable-throw crank comprises a crank arm 44 mounted on a pivot shaft 46, a slide 42 slidable along crank arm 44, a driving link 40, pivotally attached to slide 42, and an adjustable guide cam 50 which is engaged by a roller 70 carried by slide 42 in order to control the position of slide 42 along crank arm 44 in accordance with any desired function. A bearing 22 is eccentrically secured to the upper end of pivot shaft 46 and bears against a table 12 of a lens grinding machine, so that angular movement of crank arm 44 effects reciprocation of table 12. The cam 50 comprises a groove 62 formed by flexible bands 56 of sheet metal which are adjustably clamped between rounded bearing members 60 and spacing members 58 by bolts 54 and nuts 64, 65. The driving link 40 is attached to a gear segment 38 which is oscillated about a shaft 26 by a worm gear 36 driven from an electric motor 32. A table 24 carrying a lens blank 4 and drive 41 is attached to gear segment 38. A grinder 2, its drive 21 and feeding device 14 are mounted on ways 13 on table 12 which is urged by springs 18 into contact with the eccentric bearing 22.