Patent
1978-12-28
1982-12-21
Hix, L. T.
G03B 708
Patent
active
043646484
ABSTRACT:
In an automatic focusing device for a camera lens, a safety device is provided for insuring that the camera lens will be focused when a coincident auto-focusing point signal is not produced. A movable focus adjustment member for focusing the lens has a first cam thereon defining a plurality of focusing positions and a latch mechanism is coactive with the first cam to select a focusing position in response to the receipt of the signal indicating a coincident auto-focusing point. The safety device includes a second cam on the focus adjustment member defining a focusing position corresponding to a predetermined pan focusing distance between zero and infinity and wherein the latching mechanism is coactive with the second cam when the coincident auto-focusing point signal is not produced.
REFERENCES:
patent: 3443502 (1969-05-01), Harvey
patent: 3618499 (1971-11-01), Harvey
patent: 3713371 (1973-01-01), Kurihara et al.
patent: 3720148 (1973-03-01), Harvey
patent: 4126871 (1978-11-01), Tamura et al.
Kitai Kiyoshi
Takazawa Yuzuru
Adams Bruce L.
Burns Robert E.
Hix L. T,.
Lobato Emmanuel J.
Seiko Koki Kabushiki Kaisha
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