Stop-down device in a bellows device

Details Stop-down device in a bellows device Stop-down device in a bellows device

1979-03-23

1980-05-06

Hix, L. T.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351158, 354187, 354286, 354288, G03B 906, G03B 1704

Patent

active

042014611

ABSTRACT:
In a stop-down device in a bellows device having a lens mount, operating levers are provided on both the left and right side surfaces of the lens mount so as to ensure that a stop-down knob always assumes the same position even if the lens with the lens mount is mounted in normal direction or in the opposite direction.

REFERENCES:
patent: 1362833 (1920-12-01), Balston
patent: 2695547 (1954-11-01), Zander
patent: 3449042 (1969-06-01), Augrbach
patent: 3987472 (1976-10-01), Saito

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