| 摘要 |
<p>1480666 Expanding pulley gear MOLINS MACHINE CO Inc 11 Aug 1975 [29 Nov 1974] 33358/75 Heading F2D [Also in Division B4] A variable-speed drive 38 for rotating a pair of cutting blades 16, 18 (see Division B4) comprises two pairs of conical pulleys connected by a belt, the respective expanding and contracting of the pulleys being effected by means of a cam plate 72 rotated by a motor 44 via a chain-and-sprocket drive 66. The output from the drive 38 rotates a gear 74 which connects with a two-speed gear-box 34, the two speeds being selected by pneumatically-actuated clutches 78, 90, Fig. 2.</p> |
