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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4278636 | Calibrating device for a breath alcohol measuring instrument A calibrating device for a breath alcohol measuring instrument which includes a passage for the breathing air which has a sensor and a collector arranged therein with a discharge to atmosphere from the collector comprises a connecting circuit having valve... | 07/14/1981 |
| 4277251 | Method and device for determining the alcohol content of a person's breathing A method of determining the alcohol content of air exhaled by a person using a flow through testing tube having an alcohol indicating material therein and a sampling tube to which the air is directed which has a material therein for retaining the alcohol ... | 07/07/1981 |
| 4274425 | Mouthpiece for a redox gas measuring device In a device for measuring redox gases, such as alcohol, in a person's breath, a disposable tubular mouthpiece forms an elongated flow passage and is displaceably securable in a measuring head. The mouthpiece has an opening at one end for blowing air into ... | 06/23/1981 |
| 4197858 | Sensing liquid trap for respiratory gas analyzing systems A trap for collecting liquid in a gas line between the patient and a respiratory gas analyzer which trap senses the collection of a predetermined volume of liquid and operates upon sensing that volume to immediately interrupt the connection between the ga... | 04/15/1980 |
| 4197857 | System for measurement of oxygen uptake and respiratory quotient A system for measuring the oxygen uptake and respiratory quotient of a patient which employs a high resistance gas flow path in parallel with a pneumotachograph. The high resistance path is connected to each side of the pneumotachograph and a small chambe... | 04/15/1980 |
| 4178919 | Flowmeter for providing synchronized flow data and respiratory gas samples to a medical mass spectrometer Respiratory gas flow data is synchronously provided along with continuous samples of the gases for analysis by a medical mass spectrometer. The gas flow data is determined by use of the differential pressure across a resistive core in a sampling flowmeter... | 12/18/1979 |
| 4163383 | Breath testing system A breath tester includes an electronic detector providing an information signal with an amplitude level which varies as a function of the alcohol content in the breath under test. An anomaly detector circuit stores a signal related to the peak of the info... | 08/07/1979 |
| 4161875 | Apparatus for measuring the alcohol percentage in the breath of an examinee Apparatus for measuring the alcohol percentage in the breath of a person by blowing the breath into an airtight chamber enclosing a gas detector of the type of which the electric resistance changes upon exposure to alcohol vapor. The breath is introduced ... | 07/24/1979 |
| 4090078 | Method and arrangement for determining alcohol content in the breath A method for determining the alcohol content in the exhaling respiratory air using an alcohol measuring instrument and measuring the alcohol content when the exhaling air transmits the determined value of the alcohol concentration. This determined value o... | 05/16/1978 |
| 4080170 | Alcohol retainer cartridge and method for using same An alcohol retainer cartridge and method for using same are disclosed herein comprising calcium sulfate as an adsorbent for alcohol. The cartridge includes calcium sulfate contained within a tube between pieces of filter paper. At one end of the tube is a... | 03/21/1978 |
| 4047893 | Apparatus for measuring the alcohol content in human breath An individual blows into a chamber having a predetermined volume. In the chamber is mounted a gas cell including a heating conductor for catalytic burning of the alcohol and a probe at a predetermined distance from the heating conductor, both embedded in ... | 09/13/1977 |
| 4017792 | Device for determining and/or measuring alcohol content in a gas and method of manufacturing a semi-conductor body for use in alcohol detection A sensor for determining and/or measuring alcohol which exhibits an electric conductivity which varies with the alcohol concentration, comprises a heater with a metallic-oxide semi-conductor body located in the range of the heater. A pair of opposite pola... | 04/12/1977 |
| 3996010 | Breathing gas analyzer A breathing gas analyzer, especially for pulmonary use, has a frame supporting a centrally mounted radiation or analyzing chamber of about 1 and one-half to 25 millimeters (0.06 to 1.0 inches) substantially uniform inside diameter, having a circular-cylin... | 12/07/1976 |
| 3951855 | Breath alcohol test medium A standard breath alcohol test medium comprises a canister containing a charge of nitrogen and vaporized alcohol having a predetermined amount of alcohol per unit of volume therein, and means on the canister accommodating discharge of the nitrogen and alc... | 04/20/1976 |
| 3951607 | Gas analyzer A gas analyzer especially for pulmonary use has a frame supporting a centrally mounted radiation chamber of about 10 to 30 millimeters (0.4 to 1.2 inches) substantially uniform inside diameter, having a circular-cylindrical glass wall closed by molybdenum... | 04/20/1976 |
| 3948604 | Alcoholic breath simulation system A simulated alcoholic breath sample is provided by circulating a known volume of a gas such as air or non-alcoholic breath over the outer surface of a container filled with ethyl alcohol and maintained at a given temperature, the container having a wall p... | 04/06/1976 |
| 3940251 | Apparatus for detecting or measuring a constituent of a gas Apparatus for detecting alcohol vapour in a gas, such as exhaled breath. The apparatus comprises a detachable mouthpiece through which a person exhales. The mouthpiece includes a vent for venting some exhaled breath to atmosphere and an outlet port connec... | 02/24/1976 |
