Apparatus for compensating for the rebounding of an automatic di

Details Apparatus for compensating for the rebounding of an automatic di Apparatus for compensating for the rebounding of an automatic di

1981-12-22

1983-10-25

Mathews, A. A.

G03B 907

Patent

active

044115105

ABSTRACT:
Apparatus for at least partially compensating for the rebound impact of an automatic diaphragm in a photographic objective comprising a diaphragm control ring for driving the leaves of the diaphragm and a diaphragm preselector ring for predetermining the diaphragm aperture; the rebound impact being defined as the recoil produced according to the laws of elastic collisions when the diaphragm control ring which shuts the diaphragm engages the stop of the diaphragm preselector ring; said apparatus comprising at least one movable auxiliary mass which frictionally opposes the rebound movement.

REFERENCES:
patent: 3864714 (1975-02-01), Sasaki
patent: 4319824 (1982-03-01), Rossmann

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