Electric lamp and discharge devices: systems – Condenser in the supply circuit – Electric switch in the condenser circuit
Patent
1989-02-07
1991-02-19
Pascal, Robert J.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Electric switch in the condenser circuit
315320, 315DIG4, H05B 3700
Patent
active
049947184
ABSTRACT:
A means and method for dimming ballasted lamps ensures that sufficient starting voltage is always available to the ballasted lamps, yet allows switching between maximum light output, and one or more dimmed light output levels. Each lamp is connected to a ballast and has a capacitor component in parallel between the ballast and the lamp. A selection or switching device allows control of the desired light output level. For dimmed light output levels, the selection device causes a reduction in capacitance of the capacitance component to reduce the power to each of the lamps. An optional timing device ensures that full capacitance will always be available during starting. Once the selected timing period of the timing device is expired, the selected light level is achieved by automatically changing the capacitance available to each lamp to alter the output of that lamp. The selection or switching device can control a single lamp, or an array of lamps, or multiple arrays of lamps at spaced apart locations.
REFERENCES:
patent: Re31146 (1983-02-01), Gyursanszky
patent: 3323013 (1967-05-01), Lord
patent: 3893002 (1975-07-01), Woodnutt
patent: 3911320 (1975-10-01), Crawford et al.
patent: 3935505 (1976-01-01), Spiteri
patent: 4348612 (1982-09-01), Morton
patent: 4353009 (1982-10-01), Knoll
patent: 4414493 (1983-11-01), Henrich
patent: 4559479 (1985-12-01), Munson
patent: 4612478 (1986-09-01), Payne
Musco Corporation
Pascal Robert J.
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