Claims
- 1. A device for determining the alcohol content of air exhaled by a person comprising a sampling tube, a silica gel in said sampling tube capable of retaining alcohol from a gas passed therethrough, cooling means for cooling said tube and said silica gel to about 0.degree. to 5.degree. C., a measuring device for measuring the quantity of gas passed through said sampling tube, means for directing exhaled air through said sampling tube and to said measuring device to a predetermined measured quantity, heating means for heating said sampling tube and said silica gel to a temperature of 150.degree. C. to 200.degree. C. after the measured quantity is obtained, an alcohol testing tube connectable to said sampling tube, said testing tube having material therein for indicating the percentage of alcohol in the air passing therethrough, and pump means connected to said testing tube and said sampling tube for drawing flushing air through said sampling tube and into said testing tube.
- 2. A device according to claim 1, wherein said pump means comprises a suction pump connected to the discharge of said alcohol testing tube.
- 3. A device according to claim 2, wherein said measuring device comprises volume measuring bag.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2910778 |
Mar 1979 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 121,888, filed Feb. 15, 1980, now U.S. Pat. No. 4,227,251, issued July 7, 1981.
US Referenced Citations (5)
Non-Patent Literature Citations (1)
Entry |
Denbigh, Kenneth et al., The Principles of Chemical Equilibrium, Cambridge, University Press, 1971, pp. 436-438. |
Divisions (1)
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Number |
Date |
Country |
Parent |
121888 |
Feb 1980 |
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