Gas accident preventive unit

Details Gas accident preventive unit Gas accident preventive unit

1987-10-05

1989-06-13

Fleming, Michael R.

Boots, shoes, and leggings

364510, 364143, 364153, 73861, 7386102, 7386103, 48194, 48DIG10, G01F 100, G05B 1302

Patent

active

048397903

ABSTRACT:
A gas accident preventive unit has a memory circuit which is capable of memorizing in advance a continuous service safety time according to a consumed gas volume of gas apparatuses that are installed at a gas user. The unit also includes a control circuit for sending out to an emergency shutoff valve, a close signal for cutting off the gas being supplied to the user in the event that any increase in gas flowrate is recognized in the previously measured value and the value measured this time by taking a measurement of the whole gas flowrate value being supplied to the gas user at a certain interval of time. The unit takes the measurement of continuous service hours on individual gas apparatuses or the gas apparatus having the largest gas consumption volume now under service, or responds to when the service of gas apparatus with the largest gas consumption volume being monitored has elapsed the continuous service safety time.

REFERENCES:
patent: 4308866 (1982-01-01), Jelliffe et al.
patent: 4326411 (1982-04-01), Gant et al.
patent: 4518955 (1985-05-01), Meyer
patent: 4562552 (1985-12-01), Miyaoka et al.
patent: 4725964 (1988-02-01), Lloyd et al.

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