Photographic darkroom control system with timing means

Details Photographic darkroom control system with timing means Photographic darkroom control system with timing means

1981-02-19

1982-12-21

Hix, L. T.

Photocopying

Contact printing

Light boxes

354327, 354328, 355 67, 3403094, 307141, G03D 300, G03D 302

Patent

active

043646557

ABSTRACT:
Process timing and controlling system for use in photographic darkrooms involving multiple timing and control process steps including a control console, programmable in at least one channel to step through substantially all timing and control process steps, timing means in at least one channel for measuring time remaining in a particular process step, timing indicator means in at least one channel for indicating time remaining in a particular process step, a source of power connecting the console and the timing means which when activated supplies power to the console and timing mean, means for initiating a program step in at least one channel, switching means in at least one channel for stepping through the steps independently of the programmed time, a plurality of relays for operating programmed timing and control functions, and relay driving means programmed to select an appropriate output to activate the relay.

REFERENCES:
patent: 3989374 (1976-11-01), Latka et al.
patent: 4001599 (1977-01-01), Karklys
patent: 4223379 (1980-09-01), Simcoe
patent: 4318084 (1982-03-01), Scott et al.

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