Positive eccentric dobby
AssigneeSulzer Brothers Limited
InventorHelmut Macho
Life of this patent
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Abstract
A positive eccentric dobby having a rigidly mounted roller lever shaft with minimal clearance, on which pivoted roller levers are disposed, which transmit the movement to the heald frames via coupled connecting rods, reversing levers and rods. A camshaft with eccentrically disposed cam discs is rigidly mounted on a displaceable carriage. In the state where there is a clearance between the rollers and the cam discs, one or more stops swivel the roller levers so that the heald shafts can be coordinated in several preset positions. When there is no clearance between rollers and cam discs, a jamming block having a motorized driving device fixes the position of the carriage with a stop.
Claims9
A positive eccentric dobby for driving heald shafts of a loom comprising a movably mounted carriage, a camshaft rigidly mounted on the carriage, a rigidly mounted roller lever shaft, roller levers pivotally carried on the roller lever shaft, rollers mounted on the roller levers, eccentrically disposed cam discs carried on the camshaft for moving the pivotable roller levers on the roller lever shaft by contacting the rollers, means for displacing the carriage to disengage the cam discs and the rollers and therewith the roller levers, and at least one stop device including stop means for adjustably acting on the roller levers for coordinating the position of the heald shafts.
A loom comprising heald shafts and a positive eccentric dobby for driving the heald shafts including a movably mounted carriage, a camshaft rigidly mounted on the carriage, a rigidly mounted roller lever shaft, roller levers pivotally carried on the roller lever shaft, rollers mounted on the roller levers, eccentrically disposed cam discs carried on the camshaft for moving the pivotable roller levers on the roller lever shaft by contacting the rollers, means for displacing the carriage to disengage the cam discs and the rollers and therewith the roller levers, and at least one stop device including stop means for adjustably acting on the roller levers for coordinating the position of the heald shafts.
Dependencies are inferred from the claim text.