Photography – Having variable focal length of camera objective – Power zoom
Patent
1998-10-09
2000-01-25
Perkey, W. B.
Photography
Having variable focal length of camera objective
Power zoom
396299, G03B 1700
Patent
active
060186321
ABSTRACT:
A zoom ratio adjusting device includes a member movable between a telephoto end position and a wide-angle end position on opposite sides of a neutral position which is provided with a first and a second elastic arm, each arm being deformable while the zoom ratio adjusting member moves toward each of the telephoto end and wide-angle end positions to accumulate reactive force for returning the member to the neutral position and to hold the zoom ratio adjusting member in the neutral position.
REFERENCES:
patent: 3517597 (1970-06-01), Rauffer
patent: 3940777 (1976-02-01), Komine
patent: 4445757 (1984-05-01), Enomoto et al.
Fuji Photo Film Co. , Ltd.
Perkey W. B.
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