1980-10-09
1982-03-16
Griffin, Donald A.
354234, 354274, G03B 906, G03B 908, G03B 902
Patent
active
043198210
ABSTRACT:
A plurality of shutter blades for a camera serving at the same time as the diaphragm blades consisting of colored plastics, so designed that when the opening for the light beam is covered with the shutter blades more than two shutter blades are overlapped over each other so as to shade the light opening. Further at the object side in the operation space of the shutter blades a plastic control member having an opening almost the same as or larger than the light opening is provided as a heat insulation member for the shutter blades.
REFERENCES:
patent: 3421427 (1969-01-01), Starp
patent: 3438316 (1969-04-01), Rodier
patent: 4009946 (1977-03-01), Geyer et al.
patent: 4017872 (1977-04-01), Iwata et al.
patent: 4047212 (1977-09-01), Yamada
Hirohata Michio
Tezuka Nobuo
Canon Kabushiki Kaisha
Griffin Donald A.
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