Communications: electrical – Systems – Selsyn type
Patent
1997-05-19
1998-09-29
Hofsass, Jeffery A.
Communications: electrical
Systems
Selsyn type
34031003, 315137, 315199, 315244, H04M 1104
Patent
active
058150676
ABSTRACT:
A dimming control for a high intensity lighting system uses a single additional control wire for control of the dimming function. The lighting system operates on multi-phase power. A transmitter for transmitting a control signal over the single control wire is connected between two of the phases of the multi-phase power supply, or between one phase and neutral. The transmitter, upon the occurrence of a predetermined condition, transmits a control signal to the single control wire. The control signal is a rectified portion of the power supply. The predetermined condition is motion as sensed by a motion sensor, operation of a timer, or operation of a manual switch. A receiver connected to the control line receives the control signal and switches the light to a low light output mode. The is accomplished by changing the capacitance of the ballast circuit for the light. Each lamp of the lighting system has a receiver connected to the single control wire.
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Jamasbi Khosrow
Knoble David W.
Munson Robert D.
Olson James V.
Hofsass Jeffery A.
Thomas Lighting
Tweel , Jr. John
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