US4116228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiration data acquisition, conversion and display system
Assignee: United States Surgical Corp
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Filing: 1976-07-12
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Granted: 1978-09-26
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Expires: 1996-07-12
Abstract
Abstract Respiration data is measured and converted into a series of electrical output pulses, the frequency of which is related to the respiration rate. The output pulses trigger "on" and "off" a timing device, and the average time of a respiration cycle is then converted into a respiration rate and displayed. The timing device includes a means for delaying a first specified number of output pulses before beginning the sampling period and registering a count of clock pulses which represents the time period of a second specified number of the output pulses occurring subsequently to the first specified number of output pulses.
Inventors
- 👤 Emmett L. Hudspeth
- 👤 Philip C. Richardson
- 👤 John L. Neathery, Jr.
- 👤 Jerald P. Dykstra
- 👤 Allen D. Boger, Jr.
- 👤 William B. Sims, Jr.
- 👤 Glenn E. Hunt
- 👤 Tony M. Quisenberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:56
CPC Classifications
G; G01; G01R; G01R13/00; A; A61; A61B; A61B5/00; A61B5/02; A61B5/0205; A61B5/02055; A61B5/024; A61B5/08; A61B5/0816; A61B2560/00; A61B2560/04; A61B2560/0456
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
196 words
A respiration data acquisition, conversion and display system comprising: a respiration rate sensor having a resistance varying cyclically with respiration rate; first means connected to the respiration rate sensor to generate a series of electrical output pulses having a repetition rate related to the cyclic change in the resistance of the respiration rate sensor; means for generating a train of clock pulses, a counter receiving the clock pulses, and triggered into an "on" state by a first specified number of output pulses of said first means and triggered into an "off" state by a second specified number of subsequent output pulses of said first means and where a total count registered represents the time period of the second specified number of output pulses representing the cyclic changes in the resistance of the respiration rate sensor; a divider receiving the total count of the counter wherein the numerator of the divider is a scaling constant and the denominator of the divider is the total count of the counter and where the output of the divider represents the average respiration rate in respiration cycles per minute; and display means connected to said divider for displaying the respiration rate.
Claim 2
Dependent Claim
196 words
A respiration data acquisition, conversion and display system comprising: a respiration rate sensor having a resistance varying cyclically with respiration rate; first means connected to the respiration rate sensor to generate a series of electrical output pulses having a repetition rate related to the cyclic change in the resistance of the respiration rate sensor; means for generating a train of clock pulses, a counter receiving the clock pulses, and triggered into an "on" state by a first specified number of output pulses of said first means and triggered into an "off" state by a second specified number of subsequent output pulses of said first means and where a total count registered represents the time period of the second specified number of output pulses representing the cyclic changes in the resistance of the respiration rate sensor; a divider receiving the total count of the counter wherein the numerator of the divider is a scaling constant and the denominator of the divider is the total count of the counter and where the output of the divider represents the average respiration rate in respiration cycles per minute; and display means connected to said divider for displaying the respiration rate.
Claim 3
Dependent Claim
116 words
A respiration data acquisition, conversion and display system as set forth in claim 1 wherein said counter comprises: a first register connected to the first means for generating an "on" signal upon receiving the first specified number of output pulses from the first means and for generating an "off" signal upon receiving the second specified number of subsequent output pulses from the first means; and a second register receiving the clock pulses, and triggered into an "on" state and an "off" state by the first register, and where the total count registered represents the time period of the second specified number of output pulses representing the cyclic changes in the resistance of the respiration rate sensor.
Claim 4
Dependent Claim
141 words
A respiration data acquisition, conversion and display system as set forth in claim 1 wherein the first means comprises: voltage generating means connected to the respiration rate sensor to generate a voltage varying with the cyclic variation in the resistance thereof; an amplifier connected to the voltage generating means to amplify the varying voltage thereof; a Schmitt trigger circuit connected to the output of said amplifier and responsive to the amplified varying voltage thereof to generate a series of output pulses having a repetition rate related to the cyclic change in the resistance of the respiration rate sensor; and a one-shot multivibrator connected to the Schmitt trigger circuit responsive to the output pulses thereof to generate a series of output pulses of uniform duration at a repetition rate related to the cyclic change in the resistance of the respiration rate sensor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |