Device for monitoring operational readiness of a gas-measuring i

Details Device for monitoring operational readiness of a gas-measuring i Device for monitoring operational readiness of a gas-measuring i

1978-02-16

1980-04-01

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

Specific condition

320 48, 324435, G08B 2900

Patent

active

041964284

ABSTRACT:
A device for monitoring and indicating the operational readiness of a gas-measuring instrument fitted with a built-in chargeable battery has visible luminescent diodes that emit different colors when energized and which are disposed in an electrical flip-flop circuit with rheostats for adjusting the switchover values of the circuit which is provided with a pair of input leads for connecting a chargeable battery to the circuit.

REFERENCES:
patent: 3921064 (1975-11-01), Mori et al.
patent: 3927399 (1975-12-01), Fuzzell
patent: 3930198 (1975-12-01), Williamson, Jr.
patent: 4030086 (1977-06-01), Salem

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