Safety cable
Abstract
Abstract A CABLE HAVING A SAFETY FEATURE WHEREBY IT IS ADAPTED TO MONITOR AND SIGNAL CONDITIONS OF HEAT, COLD, ABRASION, FIRE, EXPLOSION, ETC. COMPRISING A BUNDLE OF CORE WIRES ABOUT WHICH THERE IS SPIRALLY WRAPPED A FLEXIBLE PAPER-THIN PLASTIC RIBBON IN OR ON WHICH CONDUCTING MEANS COMPRISING ONE OR MORE LONGITUDINALLY EXTENDING INSULATED CONDUCTORS ARE CARRIED. THE CONDUCTOR MEANS MAY HAVE A VERY LOW FUSING POINT, OR THEY MAY BE ADAPTED TO CONSTITUTE THE B ULB ELEMENT OF A RESISTANCE THERMOMETER BRIDGE OR BOTH. THE LOW FUSING POINT CONDUCTOR MEANS ARE CONNECTED WITH AN INDICATOR DEVICE AT A SIGNALLING STATION ADJACENT ONE END OF THE CABLE. THE INDICATOR SIGNALS WHEN THE CIRCUIT IS BROKEN AS BY MELTING DUE TO EXCESSIVE HEAT. AT THIS SIGNALLING STATION A RESISTANCE THERMOMETER OR EQUIVALENT DEVICE IS CONNECTED TO THE CONDUCTOR MEANS CONSTITUTING THE BULB, WHEREBY A CONTINUOUS CHECK IS HAD ON TEMPERATURE CONDITIONS OF THE CABLE.
Inventors
- 👤 Elwood R Horwinski
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |