Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1986-10-21
1988-04-05
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
361 92, 361170, 361187, 361190, G05B 902
Patent
active
047361450
ABSTRACT:
Electric control apparatus (20) for equipment (1) comprising a driving circuit (5) for generating a signal (S.sub.1) to drive the equipment as installed in a vehicle, the driving circuit including circuitry having a first specified working voltage range, and a breaking circuit (6) operatively interposed between the driving circuit and the equipment, the breaking circuit including a first switching circuit (100) for operatively interrupting the supply of the drive signal to the equipment under a condition that the supply voltage (Vdd) is lowered below a first predetermined level (V.sub.1) set lower than a normal level with respect to the first working voltage range, the first switching circuit including circuitry having a second specified working voltage range not exceeding the upper limit of the first working voltage range, wherein the breaking circuit further includes a second switching circuit (10) operatively interposed between the first switching circuit and the equipment, the second switching circuit operatively interrupting the supply of the drive signal to the equipment under a condition that the supply voltage is lowered below a second predetermined level (V.sub.2) set lower than the first predetermined level and higher than the lower limit of the second working voltage range.
REFERENCES:
patent: 3648145 (1972-03-01), Meyer et al.
patent: 3660730 (1972-04-01), Mason
patent: 4005344 (1977-01-01), Gaind et al.
patent: 4023077 (1977-05-01), Long
patent: 4397368 (1983-08-01), Takeshima
patent: 4439805 (1984-03-01), Tarleton
patent: 4649286 (1987-03-01), Takeda et al.
Abe Tomoaki
Sakurai Hidetoshi
Takemura Shigeo
Honda Giken Kogyo Kabushiki Kaisha
Martin D.
Shoop Jr. William M.
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