Electric lamp and discharge devices: systems – With automatic shunt and/or cutout – Combined with signal – indicator – or alarm
Patent
1976-06-21
1978-02-14
Smith, Alfred E.
Electric lamp and discharge devices: systems
With automatic shunt and/or cutout
Combined with signal, indicator, or alarm
315127, 315241P, 361103, 320 1, 354128, 354145, H05B 4134, H02H 306, H02H 504
Patent
active
040741702
ABSTRACT:
There is disclosed herein a voltage regulator for a power supply for load devices such as electronic photoflash units. The voltage regulator supplies power to charge the main capacitor of the photoflash unit to an appropriate voltage, and uses a semiconductor series regulator circuit. The voltage regulator provides medium-to-long term heat integration to terminate power supplied to the electronic flash unit in the event of a thermal overload in order to protect the electronic flash unit. The circuit includes a ready indicator to indicate when the main capacitor of the flash unit has reached the appropriate charge, and also includes an overload indicator to indicate an overload condition.
REFERENCES:
patent: 3588595 (1971-06-01), Silvers
patent: 3679991 (1972-07-01), Wilwerding
patent: 3688659 (1972-09-01), Takishima et al.
Roberts Charles F.
Smith Alfred E.
Vivitar Corporation
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