Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1993-06-14
2000-05-30
Ip, Paul
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318466, 318602, 318567, 4551514, G05B 2302, H04B 708, H02P 104
Patent
active
060694629
ABSTRACT:
A control unit for a rotary T.V. antenna which is responsive to a signal representative of a selected T.V. channel to produce a power output adapted to rotate the antenna to a predetermined appropriate position for receiving the selected T.V. channel such control unit can be responsive to the signal from a remote control T.V. channel selector.
REFERENCES:
patent: 3860859 (1975-01-01), Buckley
patent: 3896445 (1975-07-01), Atkinson
patent: 4072886 (1978-02-01), Dammeyer
patent: 4131839 (1978-12-01), Springer
patent: 4318106 (1982-03-01), Luedtke
patent: 4352202 (1982-09-01), Carney
patent: 4496890 (1985-01-01), Wurdack et al.
patent: 4542326 (1985-09-01), Hornback
patent: 4803412 (1989-02-01), Burton
patent: 4804899 (1989-02-01), Wurdack et al.
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