Film end detector for use in automatic film winding camera

Details Film end detector for use in automatic film winding camera Film end detector for use in automatic film winding camera

1980-10-16

1983-02-15

Hix, L. T.

354213, 354217, 354289, G03B 118, G03B 1718

Patent

active

043737960

ABSTRACT:
A film end detector for use in automatic film winding camera comprises a rotary disc having a light transmitting area and mounted on the drive shaft of a motor which is used to wind up a film automatically. The rotation of the disc is monitored by a combination of a light source and light receiving, photoelectric transducer element which are disposed to monitor the passage of light through the light transmitting area, thus detecting a film end. Logic circuits examine the output of the photoelectric transducer element at predetermined intervals to ascertain the completion or failure of completion of a normal film-winding operation.

REFERENCES:
patent: 2166419 (1939-07-01), O'Neill
patent: 4084169 (1978-04-01), Iwata et al.
Japanese Laid-Open Patent Application Lay-Open No. P 53-108,424; Laid-Open Sep. 21, 1978; Application No. P 52-23,519; Filed Mar. 4, 1977; Inventor: Izumi Kanazawa et al; Applicant: Mamiya Koki Co., Ltd.

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