Patent · US Expired

Apparatus for compensating for the rebounding of an automatic diaphragm in a photographic objective

US4411510A · kind A · utility

1Cited by

2References

9Claims

0Family size

Assignee

Ernst Leitz Wetzlar, GmbH · DE

Inventors

Rudi Faatz · Heuchelheim, DE
Siegfrid Moeller · Eichenzell, DE
Friedel Ruehl · Wetzlar, DE
Adolf Steuernagel · Wetzlar, DE

Key dates

Filing date	Dec 22, 1981
Grant date	Oct 25, 1983
Priority date	—
Expiry date	Dec 22, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG03B9/07
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.