Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1988-08-29
1990-12-25
Shoop, Jr., William M.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318290, H02P 100
Patent
active
049806220
ABSTRACT:
Control apparatus having two-fault tolerance for two position, motor operated actuators includes electronic circuitry for disconnection of the power return to the actuator motor armature thereby insuring that the motor will not be activated upon an inadvertent connection of power to either motor power input, and for indication of disconnection thereto. Testing determines the operatonal status of a motor relay and also determines inadvertent applications of power to the one of the pair of motor power inputs that is not connected to the power source through the position switch and one of the pair of limit switches. A relay and motor indication are operable to indicate either motor operation or inadvertent power interruptions in the one of the pair of motor power inputs most recently connected to the power source through the position switch and one of the pair of limit switches.
REFERENCES:
patent: 2912822 (1959-11-01), Hooker
patent: 3997826 (1976-12-01), Mayer
patent: 4070607 (1977-01-01), Mitterer
patent: 4134052 (1979-01-01), Wanlars et al.
patent: 4445075 (1984-04-01), Fry
Military Specification "Valves, Fuel Shutoff, Electric Motor Operated"-MIL-V-8608A Amendment 2, Nov. 9, 1966, Supersedes Amendment 1, Jun. 21, 1966.
DeCarlo Joseph D.
Grant Ross M.
Kosakowski Richard H.
Shoop Jr. William M.
United Technologies Corporation
Wysocki A. Jonathan
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