Compact mechanically-powered electric generator for a camera or

Details Compact mechanically-powered electric generator for a camera or Compact mechanically-powered electric generator for a camera or

1975-09-02

1977-04-26

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 29, 310 36, H02K 3500

Patent

active

040203697

ABSTRACT:
An electrical component, such as a photoflash lamp that is associated with a photographic camera, is energized by an electric current produced by a compact mechanically-driven electric generator that is located within the camera and coupled to the shutter-actuating mechanism. The generator employs a spring-driven keeper that changes the reluctance of a magnetic circuit and causes an associated wire coil to produce a voltage pulse that is synchronized relative to the opening of the camera aperture. The generator is compact enough to fit inside "Instamatic" type cameras and provides a simple, reliable and inexpensive substitute for the batteries now employed in such cameras. The small size and reliability of the generator adapt it for use in other types of devices and systems that require a passive easily-triggered electrical power source.

REFERENCES:
patent: 2448897 (1948-09-01), Livingston
patent: 2491902 (1949-12-01), Ostline
patent: 2567290 (1951-09-01), Livingston
patent: 3458765 (1969-07-01), Schindler
patent: 3555313 (1971-01-01), Seldey
patent: 3584247 (1971-06-01), Pietzonko
patent: 3760313 (1973-09-01), Schindler
patent: 3761850 (1973-09-01), Schindler

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