Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1992-02-11
1994-09-20
Pellinen, A. D.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
15314, 439191, H01H 320, A47L 538, H01R 460
Patent
active
053491467
ABSTRACT:
A combination electrical and suction hose outlet to be mounted to a building wall as part of a central vacuum cleaning system. In such a system, a remote vacuum cleaner suction hose is plugged into the wall outlet and has a power driven brush carpet sweeper end tool. A 110 volt AC line is formed into the hose and extends from the end tool to an electrical receptacle plug in the outlet. To provide a start signal to a central vacuum system motor, 24 volt DC wiring extends from the wall outlet to a motor controller. The high voltage and the low voltage power lines are maintained in electrical isolation by a circuit located at or near the wall outlet and including an optical coupler. When the end tool is turned on, AC flow is sensed by an associated circuit and the optical coupler is activated, causing a short in the DC power line to provide a start signal to the vacuum motor controller. With this system, the vacuum motor is started automatically when the power driven end tool is turned on. The system alleviates a need for both high power and low power switches at the hose handler or a low power switch in the wall outlet.
REFERENCES:
patent: 3076068 (1963-01-01), Racklyeft
patent: 3655927 (1972-04-01), Samuelson et al.
patent: 4194230 (1980-03-01), Danford
patent: 4336427 (1982-06-01), Lindsay
patent: 4664457 (1987-05-01), Suchy
patent: 4758170 (1988-07-01), Hayden
Friedhofer Michael A.
Lindsay Manufacturing, Inc.
Pellinen A. D.
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