Gauge for indicating available water supply

Details Gauge for indicating available water supply Gauge for indicating available water supply

1977-01-05

1978-06-06

Gill, James J.

Signals and indicators

Alarms

Fluid flow

116129R, 116130, G01D 100

Patent

active

040929485

ABSTRACT:
A gauge for indicating available water supply is disclosed which may be used in combination with a water pressure gauge (compound gauge) attached to a fire truck pump for checking fire hydrant pressure. Compound gauges are standard on most fire engines. The gauge is positionable over such a water pressure gauge and indicates the additional number of fire hoses that may be connected to a fire truck pump as the water pressure in the hydrant drops when water starts to flow. The water delivered from a fire hydrant decreases exponentially with a linear drop in pressure and the more demand placed on a hydrant the more this will cause a corresponding drop in pressure. The apparatus of the present invention uses an indicator that converts a linear decrease of water pressure into an exponential decrease in the number of additional fire hoses that a given hydrant will supply.

REFERENCES:
patent: 2252749 (1941-08-01), Backman et al.
patent: 3745968 (1973-07-01), Possati

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