Apparatus for stopping down diaphragm to an intermediate setting

Details Apparatus for stopping down diaphragm to an intermediate setting Apparatus for stopping down diaphragm to an intermediate setting

1990-11-15

1993-10-05

Gellner, Michael L.

G03B 907

Patent

active

052509710

ABSTRACT:
A diaphragm apparatus of lens includes diaphragm opening and closing ring and a diaphragm supporting ring for supporting a plurality of diaphragm blades and for opening and closing a diaphragm aperture in accordance with the relative rotation of the diaphragm blades. A diaphragm value setting ring sets a diaphragm value. A releasing member is actuated upon a release of a shutter to rotate the diaphragm opening and closing ring to thereby stop-down the latter. A cam mechanism operates in association with the rotation of the diaphragm value setting ring to restrict the angular displacement of the diaphragm opening and closing ring into the stopping-down direction, and a stopping-down mechanism rotates the diaphragm supporting ring into the stopping-down direction in association with the rotation of the diaphragm value setting ring in a first angular range from a full open position of the diaphragm value setting ring to a predetermined intermediate diaphragm value thereof. A diaphragm data transmitting member, that is separate from the diaphragm value setting ring, transmits diaphragm value data to a camera body side. An associated mechanism that is provided between the diaphragm value setting ring and the diaphragm data transmitting member maintains the diaphragm data transmitting member to a predetermined position in the diaphragm range in which the diaphragm aperture changes, regardless of an angular position of the diaphragm value setting ring.

REFERENCES:
patent: 3687047 (1972-08-01), Ito
patent: 4081811 (1978-03-01), Baab et al.
patent: 4344689 (1982-08-01), Kohmoto et al.
patent: 4416527 (1983-11-01), Okura
patent: 4464040 (1984-08-01), Okura et al.
patent: 4589750 (1986-05-01), Tomori et al.
patent: 4636041 (1987-01-01), Kotaka et al.

Affiliated with

Also associated with

Rating

Apparatus for stopping down diaphragm to an intermediate setting does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for stopping down diaphragm to an intermediate setting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for stopping down diaphragm to an intermediate setting will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1007988