CHARLES COLLINS
Radio and Television Technicians in North Grafton, MA
License number
Massachusetts 8339
Expiration Date
Dec 31, 1993
Type
Master Technician
Address
Address
North Grafton, MA 01536
Professional information
Fuel Valve Latch Out System
US Patent:
4455589, Jun 19, 1984
Filed:
Jul 6, 1982
Appl. No.:
6/395863
Inventors:
William J. Riordan - Shrewsbury MA
Charles Collins - North Grafton MA
Charles Collins - North Grafton MA
Assignee:
Kidde, Inc. - Clifton NJ
International Classification:
H01H 4722
US Classification:
361190
Abstract:
An electrical control system including a source of electrical power and an electrical load coupled together by a power switch having alternate circuit open and circuit closed conditions. A closure means activates the power switch to a circuit closed condition to produce power transmission between the source and the load in response to a closure signal produced by a condition responsive control circuit. Connected in series with the power switch is a protective switch also activated from a circuit open to a circuit closed condition in response to the closure signal. A sensing circuit produces a fault signal in response to a closed condition of the power switch and a simultaneous circuit open condition of the protective switch.