Camera focussing aid

Details Camera focussing aid Camera focussing aid

1976-01-20

1978-01-03

Hix, L. T.

354149, 354165, 354200, G03B 1503, G03B 300

Patent

active

040670309

ABSTRACT:
A camera focussing aid includes an auxiliary light projector directing a light beam forwardly of the camera and mounted in the camera body or in a separable flash unit. A mechanism is provided for deactivating the auxiliary projector during the camera exposure sequence and includes a switch network connecting the auxiliary projector lamp to a battery, the switch being opened either with the depression of the shutter release member, the initiation of the shutter opening, the closing of the flash triggering switch or a drop in voltage across the flash charge capacitor. The projector beam is advantageously of small divergence and the auxliary projector may be used with a camera having a split image range finder or a single lens reflex camera.

REFERENCES:
patent: 2153132 (1939-04-01), Crowther
patent: 2312261 (1943-02-01), Mills
patent: 3393623 (1968-07-01), Gutmann et al.
patent: 3435744 (1969-04-01), Stimson
patent: 3643574 (1972-02-01), Moriyama et al.
patent: 4001850 (1977-01-01), Fujita

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