Breath testing system

Details Breath testing system Breath testing system

1977-07-22

1979-01-02

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

G01N 2714

Patent

active

041321090

ABSTRACT:
In a breath tester of the type wherein a subject blows breath into an input for a predetermined continuous and uninterrupted flow, which breath is exposed to an electronic detector element whose output signal is employed to derive and display an output which is representative of the alcohol present in the breath and which detector, if subject to continued exposure of additional breath after the predetermined flow, is prone to produce an erroneous output, an electronic system is provided for electrically storing and isolating a detector signal produced from only the predetermined flow, whereby errors resulting from continuous flow or mechanical valving arrangements are avoided. The system disclosed includes circuit means for switching out and holding the end of flow detector signal and for producing an output based on that signal.

REFERENCES:
patent: 3842345 (1974-10-01), Padgitt et al.
patent: 3877291 (1975-04-01), Hoppesch et al.
patent: 3886786 (1975-06-01), Hoppesch et al.
patent: 3997837 (1976-12-01), Betz et al.

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