Fuel security device

Details Fuel security device Fuel security device

1978-11-13

1981-04-28

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

With second control

137 784, 13762412, 251129, 251137, 361154, 361194, F16K 1736

Patent

active

042639280

ABSTRACT:
A security device for a fuel such as natural gas having a series circuit of a relay switch, a hazard detecting switch, a relay switch operating coil and a timer. A valve coil is adapted to open and close a main fuel supply valve. The valve coil is connected in parallel to the series circuit. A reset switch is adapted to excite the valve coil and is connected in parallel with the relay switch. In one embodiment, the hazard detecting switch, the relay switch operating coil and the valve coil are coupled through a transformer in series with an electric source. The hazard detecting switch the relay switch operating coil and the valve coil are disposed on a secondary side of the transformer. The main fuel supply valve is normally closed such that in case of a power failure, the valve will close and remain closed.

REFERENCES:
patent: 1325048 (1919-12-01), Simon
patent: 2611643 (1952-09-01), Higgins
patent: 2648034 (1953-08-01), Douglas
patent: 2718951 (1955-09-01), Mason
patent: 3080508 (1963-03-01), Hipple
patent: 3524471 (1970-08-01), Bresser
patent: 3625476 (1971-12-01), Meir
patent: 3906294 (1975-09-01), Lourigan
patent: 4065096 (1977-12-01), Frantz
patent: 4078709 (1978-03-01), Jenkins
patent: 4098284 (1978-07-01), Yamada

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