1980-03-18
1982-08-17
Hix, L. T.
354286, G03B 907, G03B 1700
Patent
active
043446884
ABSTRACT:
An interchangeable lens of the automatic present diaphragm aperture type for a single lens reflex camera includes a swingable actuating lever spring biased to an advanced position and retracted and released by a control member retracted and advanced by the camera mechanism respectively with the termination of the exposure and the initiation of an exposure. A diaphragm blade control ring is spring biased to fully open aperture position and is unidirectionally drive coupled to the actuating lever by a rod projecting from the ring into the path of movement of a projection on the actuating lever so as to follow the lever under the influence of the biasing spring and to disengage the projection upon the diaphragm reaching its fully open position thereby permitting further retraction of the actuating lever and so as to be engaged and positively advanced by the projection with the advance of the lever.
REFERENCES:
patent: 3165997 (1965-01-01), Sugano et al.
patent: 4081811 (1978-03-01), Baab et al.
Hix L. T,.
Minolta Camera Kabushiki Kaisha
Tarcza Thomas H.
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