Patent US4496431A successfully refreshed from Google Patents.
Patent US3359797A successfully refreshed from Google Patents.
US3359797A
Expired / Lapsed
US
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Appapratus for recording an integrated record of gas flow
Assignee: Individual
•
Filing: 1964-09-30
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Granted: 1967-12-26
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Hugh A Preller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:28
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F15/00; G01F15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A RATE OF GAS FLOW SENSING MEANS ADAPTED TO BE CONNECTED WITH A GAS CONVEYING LINE FOR MEASURING THE VOLUME OF GAS PASSING THROUGH AN ORIFICE IN THE GAS LINE, COMPRISING: A PAIR OF BALANCED THERMISTORS POSITIONED IN SAID GAS LINE ON OPPOSITE SIDES OF SAID ORIFICE; A PAIR OF SLIDE RAILS; A TWO-PHASE BALANCING MOTOR MOUNTED ON SAID SLIDE RAILS FOR MOVEMENT ALONG SAID RAILS IN OPPOSING DIRECTIONS, SAID BALANCING MOTOR HAVING A CONTROL WINDING; A SPUR GEAR CONNECTED WITH THE ARMATURE OF SAID BALANCING MOTOR; A RACK MESHING WITH SAID SPUR GEAR; A CHART HOLDING AND ADVANCING MEANS; A CHART MOUNTED ON THE CHART HOLDING AND ADVANCING MEANS; A STYLUS IN CONTACT WITH SAID CHART; A SYNCHRONOUS MOTOR MOUNTED ON SAID BALANCING MOTOR; A VARIABLE SPEED MEANS INTERCONNECTING SAID SYNCHRONOUS MOTOR WITH SAID CHART HOLDING AND ADVANCING MEANS FOR VARYING THE RATE OF ADVANCEMENT OF THE LATTER; AND A DIFFERENTIAL VOLTAGE POTENTIAL SENSING CIRCUIT AND AMPLIFYING MEANS CONNECTING SAID THERMISTORS WITH THE CONTROL WINDING OF SAID BALANCING MOTOR FOR ENERGIZING THE LATTER IN RESPONSE TO GAS FLOW
Claim 2
Dependent Claim
179 words
A RATE OF GAS FLOW SENSING MEANS ADAPTED TO BE CONNECTED WITH A GAS CONVEYING LINE FOR MEASURING THE VOLUME OF GAS PASSING THROUGH AN ORIFICE IN THE GAS LINE, COMPRISING: A PAIR OF BALANCED THERMISTORS POSITIONED IN SAID GAS LINE ON OPPOSITE SIDES OF SAID ORIFICE; A PAIR OF SLIDE RAILS; A TWO-PHASE BALANCING MOTOR MOUNTED ON SAID SLIDE RAILS FOR MOVEMENT ALONG SAID RAILS IN OPPOSING DIRECTIONS, SAID BALANCING MOTOR HAVING A CONTROL WINDING; A SPUR GEAR CONNECTED WITH THE ARMATURE OF SAID BALANCING MOTOR; A RACK MESHING WITH SAID SPUR GEAR; A CHART HOLDING AND ADVANCING MEANS; A CHART MOUNTED ON THE CHART HOLDING AND ADVANCING MEANS; A STYLUS IN CONTACT WITH SAID CHART; A SYNCHRONOUS MOTOR MOUNTED ON SAID BALANCING MOTOR; A VARIABLE SPEED MEANS INTERCONNECTING SAID SYNCHRONOUS MOTOR WITH SAID CHART HOLDING AND ADVANCING MEANS FOR VARYING THE RATE OF ADVANCEMENT OF THE LATTER; AND A DIFFERENTIAL VOLTAGE POTENTIAL SENSING CIRCUIT AND AMPLIFYING MEANS CONNECTING SAID THERMISTORS WITH THE CONTROL WINDING OF SAID BALANCING MOTOR FOR ENERGIZING THE LATTER IN RESPONSE TO GAS FLOW
References Cited (Backward Citations)
US3147618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |