Methods and apparatus for maintaining a constant tension on an e

Details Methods and apparatus for maintaining a constant tension on an e Methods and apparatus for maintaining a constant tension on an e

1993-12-30

1996-03-12

Martin, David S.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318282, 191122A, 242413, 2424205, B65H 5938

Patent

active

054989400

ABSTRACT:
A constant tension is maintained on cord of a robot by determining whether the cord is being extracted or retracted and the extent of such extraction or retraction, and increasing or decreasing a spring force applied to the cord by an amount suitable for maintaining a constant tension on the cord.

REFERENCES:
patent: 3983977 (1976-10-01), Crabb
patent: 4136840 (1979-01-01), Bates
patent: 4721833 (1988-01-01), Dubay
patent: 4842108 (1989-06-01), Anderson et al.

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