Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A method of determining and separating the alveolar air of a person's exhaled air from the remainder of the exhaled air and thereafter measuring a concentration of a desired gas component of the separated alveolar air, comprising, conveying the exhaled air at a minimum velocity through a conduit, continuously measuring a temperature of the conveyed air as the temperature changes, and when the changes in the temperature which is measured drops below a predetermined threshold value for such changes, directing the air into a measuring chamber, and using a sensor device in the measuring chamber to determine the concentration of the desired gas component.
Claim 2
Independent Claim
104 words
A method of determining and separating the alveolar air of a person's exhaled air from the remainder of the exhaled air and thereafter measuring a concentration of a desired gas component of the separated alveolar air, comprising, conveying the exhaled air at a minimum velocity through a conduit, continuously measuring a temperature of the conveyed air as the temperature changes, and when the changes in the temperature which is measured drops below a predetermined threshold value for such changes, directing the air into a measuring chamber, and using a sensor device in the measuring chamber to determine the concentration of the desired gas component.
Claim 3
Dependent Claim
20 words
A method, as claimed in claim 1, including directing the exhaled air into the chamber only after a predetermined delay.
Claim 4
Independent Claim
222 words
A device for determining and separating the alveolar air part of a person's breathing air from the remainder and thereafter measuring a proportion of a desired gas component thereof, comprising, a tube for breathing air having a passage therethrough for the passage of the breathing air with a first end with a main inlet passage portion and including a first branch connected to said main inlet passage portion and terminating in a first air outlet to ambience and a second branch connected to said main inlet passage portion and terminating in a second outlet to ambience, wall means defining a measuring chamber for alveolar air connected in said second branch portion, respective first and second shutoff valves in said first and second branch portions, a third shutoff valve between said main inlet passage portion and said measuring chamber, a temperature sensor in said main inlet passage portion for continuously sensing the temperature of the breathing air, a threshold valve comparator connected to said temperature sensor, an AND-gate connected to said comparator and to said first, second and third shutoff valves and being responsive to temperature variations in respect to a predetermined threshold value to operate said third valve to admit air through said second passage portion to said measuring chamber and to selectively open and close said first and second shutoff valves.
Claim 5
Independent Claim
222 words
A device for determining and separating the alveolar air part of a person's breathing air from the remainder and thereafter measuring a proportion of a desired gas component thereof, comprising, a tube for breathing air having a passage therethrough for the passage of the breathing air with a first end with a main inlet passage portion and including a first branch connected to said main inlet passage portion and terminating in a first air outlet to ambience and a second branch connected to said main inlet passage portion and terminating in a second outlet to ambience, wall means defining a measuring chamber for alveolar air connected in said second branch portion, respective first and second shutoff valves in said first and second branch portions, a third shutoff valve between said main inlet passage portion and said measuring chamber, a temperature sensor in said main inlet passage portion for continuously sensing the temperature of the breathing air, a threshold valve comparator connected to said temperature sensor, an AND-gate connected to said comparator and to said first, second and third shutoff valves and being responsive to temperature variations in respect to a predetermined threshold value to operate said third valve to admit air through said second passage portion to said measuring chamber and to selectively open and close said first and second shutoff valves.
Claim 6
Dependent Claim
17 words
A device, as claimed in claim 3, including a timing switch connected to said second shutoff valve.
Claim 7
Dependent Claim
19 words
A device, as claimed in claim 3, including a delay switch connected between said threshold comparator and said AND-gate.