Viewfinder illumination scale adjusting mechanism for cameras

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Details

G03B 1310

Patent

active

055550584

ABSTRACT:
A viewfinder illumination scale adjusting mechanism including a sliding block disposed at one side of the viewfinder of a camera, a first cover board and a second cover board vertically spaced by the viewfinder and defining a respective illumination window of a different size, and a switching lever moved to switch on/off the electric circuit of the camera, wherein when the sliding block is shifted upwards, the switching lever is moved to switch on the electric circuit of the camera, and the first cover board is moved to coincide its illumination window with the viewfinder; when the sliding block is shifted downwards, the switching lever is moved to switch off the electric circuit of the camera, and the second cover board is moved to coincide its illumination window with the view finder; when the sliding block is shifted to the middle position, the two cover boards are turned away from the viewfinder, and the switching lever is forced to switch off the electric circuit.

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patent: 2881684 (1959-04-01), Brohl et al.
patent: 3619202 (1971-11-01), Bellows
patent: 4283860 (1981-08-01), Rucker
patent: 4931818 (1990-06-01), Gates
patent: 5257055 (1993-10-01), Cho et al.
patent: 5381205 (1995-01-01), Kotani et al.
patent: 5410381 (1995-04-01), Kameyama et al.

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