Machine element or mechanism – Mechanical movements – Reciprocating to or from oscillating
Patent
1992-06-18
1994-05-31
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Reciprocating to or from oscillating
74106, 354247, F16H 2144
Patent
active
053158890
ABSTRACT:
An iris drive mechanism has two slidable diaphragms which are operatively connected with a motor through a lever arrangement which, for a given motor output shaft rotational speed moves the diaphragms slowly at their extreme positions wherein the aperture is small and large respectively, and more quickly at an intermediate stage. The slower movement when the aperture is small improves the F number resolution.
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(Canon) Patent Abstracts of Japan, unexamined applications, field P, vol. 12 No. 226, Jun. 28, 1988; The Patent Office Japanese Government p. 59 P 722.
Moro Shuuji
Nishida Yasuo
Ohshima Eiji
Tada Kanehiro
Herrmann Allan D.
Kananen Ronald P.
Laub David W.
Sony Corporation
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