Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1983-08-15
1985-04-02
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
2541343R, 254274, 254361, B65H 5938, B66D 150
Patent
active
045082812
ABSTRACT:
A rotary drum cable winding apparatus particularly adapted for constant tension pulling operations in conjunction with stringing aerial electrical cables includes a hydraulic drive and control system utilizing a variable displacement, variable torque hydraulic motor supplied by a pressure compensated hydraulic pump. The motor has a built-in displacement control which is responsive to a predetermined pressure set point which may be varied by a pilot control pressure signal to increase motor displacement per revolution and output torque for a given motive fluid supply pressure. The increasing torque requirements and the reduced rotative speed of the rotary drum coincide with the requirement for relatively constant tension and constant speed of the messenger line or cable being wound on the drum. A proportional pressure relief valve is in circuit with a pilot control pressure line and with the motive fluid supply line to the motor to automatically adjust the pressure set point at which motor displacement and torque output are controlled as a result of setting the maximum or limit pressure on the pressure compensated pump. Pressure setting changes for various maximum line tension settings may be set by adjusting a pressure relief valve in circuit with the pump displacement control.
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Jillions John M.
TSE International
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