Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1984-03-12
1987-01-27
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Current and/or voltage regulation
84464R, 315161, 315174, 315294, 362811, 315320, G05F 100, H05B 3702, H05B 3904, H05B 4136
Patent
active
RE0323411
ABSTRACT:
A disco light assembly is provided which includes a multiplicity of individual electric lamps formed in a circle, or in any other appropriate configuration, and which are illuminated in any desired sequence in response to a disco beat. The individual lamps are preferably of the high intensity type, and each generates a shaft of light, preferably white, when illuminated. A common regulated power supply is provided which supplies a continuous filament current to all the lamps which is of sufficient amplitude to maintain the filaments in a warm state but insufficient to illuminate the lamps. Each lamp has its own control module connected to the common power supply, and when a module is triggered, it causes a high current pulse to be introduced to the corresponding lamp for a few milliseconds, followed by a power current of sufficient intensity to illuminate the lamp. The power current continues for so long as the lamp is to be illuminated. A rapid turn-on circuit is included in each module, so that each lamp is quickly turned on without creating any undue thermal stress in the lamp filament. However, the lamps turn off at a relatively slow rate. This obviates irritating strobe light effects.
REFERENCES:
patent: 3154721 (1964-10-01), Sommeria
patent: 3243650 (1966-03-01), Hawkins et al.
patent: 3828221 (1974-08-01), Spiteri
patent: 3869699 (1975-03-01), Haller et al.
patent: 4158793 (1979-06-01), Lewis
patent: 4362971 (1982-12-01), Sloan, Jr.
patent: 4417182 (1983-11-01), Weber
Star Spinner, Popular Electronics, vol. 17, No. 2, Feb. 1981, pp. 42-46.
Link, Discotheque Lighting Controlled by Prom, Electronic Engineering, Apr. 1975, p. 31.
Beecher Keith D.
Chatmon Saxfield
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