Electricity: motive power systems – With particular motor-driven load device – Tension-maintaining type of motor-control system
Patent
1994-08-31
1996-03-26
Martin, David S.
Electricity: motive power systems
With particular motor-driven load device
Tension-maintaining type of motor-control system
318286, 191 122A, 2424205, B65H 5938
Patent
active
055023584
ABSTRACT:
A self-propelled robot includes an electrical cord mounted on a spool for being drawn-in or drawn-out. A sensor senses a rate at which the cord is drawn in or drawn out and actuates a motor connected to the spool for applying a rotary force to the spool to control the cord tension.
REFERENCES:
patent: 4511100 (1985-04-01), Oetringhaus
patent: 4736826 (1988-04-01), White et al.
Martin David S.
Samsung Electronics Co,. Ltd.
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