| 摘要 |
1,183,798. Linkwork. NATIONAL CASH REGISTER CO. 2 Dec., 1968 [2 Jan., 1968], No. 57029/68. Heading F2K. A linkage for converting uniform rotary motion into cyclically varying rotary motion comprises aligned input and output shafts 14, 16 carrying forks 18, 48 respectively pivoted to a block 20 and to arcuate links 50, 56, and the block 20 carries pins 24, 54 having their outer ends fixed in a freely rotatable ring 26 and pivoted to the arcuate links 50, 56. The amplitude of the cyclic variations is increased by increasing the angle # between the axis P-P<SP>1</SP> of the pins 24, 54 and the vertical. The angle # is adjusted by turning an outer ring 28 carrying the ring 26 about stub axles 32, 34 and the ring 28 is held in an adjusted position by a locking mechanism 46. |
