Auxiliary knob for gas valve to annunciate open condition

Details Auxiliary knob for gas valve to annunciate open condition Auxiliary knob for gas valve to annunciate open condition

1986-04-21

1987-05-12

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

Specific condition

340547, 340549, 340686, 137554, 251292, 200 6185, 200 6186, 116277, 116112, 116204, G08B 2100, F16K 3700

Patent

active

046653864

ABSTRACT:
An electro-mechanical auxiliary knob structure, releasably attachable to a rotatable knob of a valve, to annunciate an open condition of that valve operated thereby. The auxiliary knob pivots relative to its attachment structure to switch electric circuitry carried within the auxiliary knob to annunciate last knob motion in the direction causing valve opening. The auxiliary knob is particularly adapted for use on valves of compressed gas tanks used in gas welding.

REFERENCES:
patent: 2767681 (1956-10-01), Pontius
patent: 3859619 (1975-01-01), Ishihara et al.
patent: 3994255 (1976-11-01), Thompson
patent: 4518008 (1985-05-01), Fenster et al.
patent: 4629157 (1986-12-01), Tsuchiya et al.

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