Instrument focus stop

Details Instrument focus stop Instrument focus stop

1978-04-17

1979-05-22

Henry, Jon W.

74526, G02B 2126

Patent

active

041556232

ABSTRACT:
A stop for an instrument focusing shaft wherewith the extent of its rotational excursion in one direction may be readily adjusted and repeated. A gear fixed to the focusing shaft and in mesh with additional gearing is selectively stopped by another gear caused to mesh across two gears of the system. The stop gear may be carried out of mesh by reverse rotation of the focusing shaft.

REFERENCES:
patent: 2490970 (1949-12-01), Krassilnikian et al.
patent: 2722297 (1955-11-01), Gates, Jr.
patent: 2844038 (1958-07-01), Danta
patent: 3150259 (1964-09-01), Wilska
patent: 3662610 (1972-05-01), Thoen

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