Jacquard reversing mechanism for looms

Abstract

In a double-left Jacquard of the Verdol type in which the cam system adapted to actuate the pusher grid must be displaced angularly on its driving shaft between a first and a second position, or vice versa, whenever the direction of rotation of the loom is reversed, a reversing mechanism is provided by which this displacement is automatically accomplished when the Jacquard starts rotating. For this purpose said cam system, loosely journaled on its driving shaft, has a gear wheel which meshes with a first planet gear, the shaft of which is supported by a planet carrier keyed on the driving shaft. The planet shaft carries a second planet gear which meshes with a toothed sector carried by a drum having a limited angular freedom on the driving shaft and subjected to the action of a brake. Means are provided to release the brake when the cam system has been displaced. Other means render the brake ineffective as long as the Jacquard is at such a point of its operative cycle that displacement of the cam system would be liable to damage parts of the Jacquard. A Maltese cross mechanism locks the planet gears when the cam system has reached either one of its first and second positions on said driving shaft, the angle of freedom of the drum on the driving shaft being greater than the angular extent of the toothed sector.