Electrical device for measuring and controlling the temperature at a large number of points
Abstract
Abstract FOR THE CONTROL OF TEMPERATURE ON MULTIPLE PROCESSES, IN PARTICULAR THE CONTROL OF THE TEMPERATURE OF THREADING HEADS OF A TEXTILE MACHINE, A DEVICE IS PROVIDED HAVING A MULTIPLE WHEATSTONE BRIDGE IN WHICH EACH CONTROL ARM COMPRISES A STATIC SWITCHING MEANS, THE BRIDGE HAVING COMMON SET MEANS AND BEING SUPPLIED BY MEANS OF AN UNIDIRECTIONAL CHOPPED CURRENT, MEANS BEING PROVIDED FOR CONTROLLING THE CONDUCTION ANGLE OF THE STATIC SWITCHING MEANS AND, THEREFORE, THE RATE OF HEATING THROUGH A CONTROL OF A PHASE DIFFERENCE BETWEEN THE CHOPPED CURRENT AND THE A.C. VOLTAGE SUPPLY. ALARM MEANS ARE FURTHER PROVIDED FOR SIGNALLING THE TEMPERATURE DEFECTS, AND LOGIC CIRCUITS FOR AUTOMATICALLY PRODUCING PASSAGE FROM AN ACCELERATED TO A NORMAL HEATING, ONCE ALL THE CONTROL POINTS HAVE REACHED A PREDETERMINED LOWER THRESHOLD TEMPERATURE.
Inventors
- 👤 G Trubert
- 👤 J Droulin
Bibliographic Details
Claims Analysis
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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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |