1976-11-24
1979-03-13
Gellner, Michael L.
354226, 354234, G03B 908, G03B 962
Patent
active
041439570
ABSTRACT:
A camera shutter includes a pair of spaced apart base plates supporting the various shutter components. At least one of the base plates is formed entirely of synthetic resin material which is electrically insulative and which possesses lubricating properties. The synthetic resin base plate has a set of tubular portions extending toward and connected to the other base plate and also has a set of shafts turnably supporting some of the shutter components, such as the control lever and control cam. The synthetic resin base plate also includes a hollow winding frame about which is wound a coil and in which is slidably inserted an armature to form an electromagnet for use in controlling the shutter operation. The use of a synthetic resin base plate dispenses with the necessity of separate lubrication and enables formation of a smaller shutter.
REFERENCES:
patent: 3162110 (1964-12-01), Miessen
patent: 3798671 (1974-03-01), Ishida
patent: 4051499 (1977-09-01), Kondo
patent: 4060313 (1977-11-01), Kondo
Koyama Mitsuo
Nakagawa Tadashi
Nemoto Ichiro
Onda Eiichi
Watanabe Masanori
Adams Bruce L.
Burns Robert E.
Gellner Michael L.
Lobato Emmanuel J.
Seiko Koki Kabushiki Kaisha
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