Method and apparatus for testing a person's breath for the deter

Details Method and apparatus for testing a person's breath for the deter Method and apparatus for testing a person's breath for the deter

1980-02-11

1982-03-02

Michell, Robert W.

Surgery

Truss

Pad

128724, 128730, 422 84, 7386301, 73204, A61B 1000

Patent

active

043174531

ABSTRACT:
A method for determining the gas content of a person's breathing air, comprises, first determining when the breathing air is at a condition in which best testing results will be effected. This is done by arranging a capacitor in a breathing tube through which the breathing air is directed. The capacitor is first heated to a predetermined temperature and the breathing air is directed over it so as to cool it until it has attained a predetermined temperature change. This temperature change is such that it will take place when the person's breathing air has its desired constituency. When this occurs, the breathing air is then directed into a test chamber in which it is tested to determine the constituency of the breathing air particularly the percentage of alcohol which it contains. A device for testing a person's breath in addition to the tube through which the breath is directed containing the thermal capacitor also contains a test chamber which is connected to the tube with control means which senses the temperature of the capacitor and permits the flow of the gas into the test chamber only after a predetermined temperature drop has taken place.

REFERENCES:
patent: 1766148 (1930-06-01), Sawyer
patent: 2016660 (1935-10-01), Weeks
patent: 3592055 (1971-07-01), Dorman
patent: 3613665 (1971-10-01), Gorsuch
patent: 3623364 (1971-11-01), Withrow
patent: 3645133 (1972-02-01), Simeth et al.
patent: 4090078 (1978-05-01), Heim

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