Patent US3343791A successfully refreshed from Google Patents.
US3343791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating system
Assignee: Motorola Solutions Inc
•
Filing: 1965-05-24
•
Granted: 1967-09-26
•
Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr William H White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:56
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1393; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A CONTROL SYSTEM FOR TEMPERATURE REGULATING APPARATUS COMPRISING A HEATER AND COOLER USED TO MAINTAIN A PRESELECTED TEMPERATURE IN AN ENCLOSURE ACCORDING TO THE MAGNITUDE OF THE CONTROL VOLTAGE APPLIED BY SAID CONTROL SYSTEM TO THE APPARATUS, SAID CONTROL SYSTEM INCLUDING IN COMBINATION, AN AMPLIFIER COMPRISING SEMICONDUCTOR MEANS HAVING A MAIN CURRENT PATH AND A CONTROL CURRENT PATH, SAID SEMICONDUCTOR MEANS BEING RESPONSIVE TO VARIATION OF CURRENT IN SAID CONTROL CURRENT PATH TO VARY THE CURRENT IN SAID MAIN CURRENT PATH, SAID AMPLIFIER BEING RESPONSIVE TO THE MAGNITUDE OF CURRENT IN SAID MAIN CURRENT PATH TO SUPPLY A CONTROL VOLTAGE WHICH VARIES THEREWITH TO THE TEMPERATURE REGULATING APPARATUS, FIRST TEMPERATURE SENSITIVE RESISTOR MEANS AND VARIABLE RESISTOR MEANS SERIES CONNECTED ACROSS THE SOURCE OF POTENTIAL, MEANS CONNECTING THE JUNCTION OF SAID FIRST RESISTOR MEANS AND SAID VARIABLE RESISTOR MEANS TO SAID CONTROL CURRENT PATH, A SECOND TEMPERATURE SENSITIVE RESISTOR SERIES
Claim 2
Dependent Claim
149 words
A CONTROL SYSTEM FOR TEMPERATURE REGULATING APPARATUS COMPRISING A HEATER AND COOLER USED TO MAINTAIN A PRESELECTED TEMPERATURE IN AN ENCLOSURE ACCORDING TO THE MAGNITUDE OF THE CONTROL VOLTAGE APPLIED BY SAID CONTROL SYSTEM TO THE APPARATUS, SAID CONTROL SYSTEM INCLUDING IN COMBINATION, AN AMPLIFIER COMPRISING SEMICONDUCTOR MEANS HAVING A MAIN CURRENT PATH AND A CONTROL CURRENT PATH, SAID SEMICONDUCTOR MEANS BEING RESPONSIVE TO VARIATION OF CURRENT IN SAID CONTROL CURRENT PATH TO VARY THE CURRENT IN SAID MAIN CURRENT PATH, SAID AMPLIFIER BEING RESPONSIVE TO THE MAGNITUDE OF CURRENT IN SAID MAIN CURRENT PATH TO SUPPLY A CONTROL VOLTAGE WHICH VARIES THEREWITH TO THE TEMPERATURE REGULATING APPARATUS, FIRST TEMPERATURE SENSITIVE RESISTOR MEANS AND VARIABLE RESISTOR MEANS SERIES CONNECTED ACROSS THE SOURCE OF POTENTIAL, MEANS CONNECTING THE JUNCTION OF SAID FIRST RESISTOR MEANS AND SAID VARIABLE RESISTOR MEANS TO SAID CONTROL CURRENT PATH, A SECOND TEMPERATURE SENSITIVE RESISTOR SERIES
References Cited (Backward Citations)
US1038402A
Cited
US2045790A
Cited
US2949237A
Cited
US2975976A
Cited
US2954530A
Cited
US3071676A
Cited
GB935938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |