Gas flow measuring apparatus

Details Gas flow measuring apparatus Gas flow measuring apparatus

1980-09-17

1982-11-09

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

73118, G01F 168

Patent

active

043578306

ABSTRACT:
A gas flow measuring apparatus of the type which measures for example, the amount of air flow to the engine of an automotive vehicle, includes a flow measuring tube, an electric heater wire and two temperature dependent resistance wires which are all positioned in the flow measuring tube such that one of the temperature dependent resistance wires is subjected to the effect of the heat of the electric heater and the other is not subjected to the same effect, whereby the flow rate of gas is measured in accordance with the output signal of a voltage divider including a series-connection of the temperature dependent resistance wires. The electric heater wire and the temperature dependent resistance wire subjected to the effect of the heat from the former are wound closely and alternately on the same support made from an electrical insulating material.

REFERENCES:
patent: 1902427 (1933-03-01), Sawyer
patent: 3246515 (1966-04-01), Martino et al.
patent: 3648518 (1972-03-01), Hans et al.
patent: 3975951 (1976-08-01), Kohama et al.
patent: 4244217 (1981-01-01), Ledbetter

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