Racking mechanism for bobbin machine

Abstract

The bobbin racking mechanism for a Jacquard machine comprises two stationary shafts arranged side-by-side on a fixed support. One shaft supports for free rotation a drive unit including a drive spur gear which supports on one face an input bevel gear pinion and on the other face an eccentric cam; a transmission unit including a tubular housing having a cross-like section to define four stop arms; two bevel gear pinions are arranged in the tubular housing for rotation about an axis transverse to the stationary shaft, the pinions being in mesh with the input gear pinion; an output unit having an output bevel gear pinion in mesh with the transmission gear pinions, a disc cam having two diametrically opposed recesses and an upper plate with arcuate recesses for racking the bobbins. The other stationary shaft supports an operator member including a sleeve with a pallet fork, a locking device assembled of two superposed coupling plates, the lower plate being linked by a connecting rod to the eccentric cam in the drive unit and continuously performs an oscillating movement and the upper plate is connected to the sleeve. The pallet fork has two radially directed arms forming an angle with one another. One arm is engageable with the recesses in the cam disc in the output unit whereas the lower arm is engageable with the stop recesses in the cross-like housing. A coupling device includes a pivotable ratchet arranged in one of the plates and actuated by means of electrical or mechanical driving mechanism to engage the lower plate with the upper plate when actuated.

Dependencies are inferred from the claim text.