US3899071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt protective system
Assignee: Atlantic Richfield Co
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Filing: 1973-06-29
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Granted: 1975-08-12
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Expires: 1993-06-29
Abstract
Abstract A conveyor belt protective system comprising an endless conveyor belt having an electrically conductive wire therein extending the length of said belt and forming a closed current path, means spaced from said belt for inducing an electric current in said current path, means for detecting the electric current in said closed current path, and means electrically associated with said detecting means for indicating any interruption of electric current flow in said current path.
Inventors
- 👤 Walter Roy Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A system for monitoring the condition of conveyor belts comprising a conveyor belt adapted to be supported by a pair of spaced roller means and driven in endless path, an elongated conductor in said belt, said conductor disposed in said belt in substantially a sinusoidal pattern laterally of and extending along the length of the belt to form a closed current path, a pair of megnetically coupled coils positioned adjacent said conveyor belt for providing a magnetic field through which said conveyor belt passes to induce an electric current in said closed current path, detecting means disposed adjacent said conveyor belt, said detecting means responsive to the condition of said conveyor belt and capable of producing an output when said condition changes, circuit means including amplifier means for amplifying an output from said detecting means, relay means and an alarm, said circuit means connected to said detecting means for signalling the occurrence of said output, and a plurality of taps disposed in the edge of said conveyor belt, each said tap including a conductor in electrical contact with said elongated conductor to monitor continuity along said electrical path.
Claim 2
Independent Claim
188 words
A system for monitoring the condition of conveyor belts comprising a conveyor belt adapted to be supported by a pair of spaced roller means and driven in endless path, an elongated conductor in said belt, said conductor disposed in said belt in substantially a sinusoidal pattern laterally of and extending along the length of the belt to form a closed current path, a pair of megnetically coupled coils positioned adjacent said conveyor belt for providing a magnetic field through which said conveyor belt passes to induce an electric current in said closed current path, detecting means disposed adjacent said conveyor belt, said detecting means responsive to the condition of said conveyor belt and capable of producing an output when said condition changes, circuit means including amplifier means for amplifying an output from said detecting means, relay means and an alarm, said circuit means connected to said detecting means for signalling the occurrence of said output, and a plurality of taps disposed in the edge of said conveyor belt, each said tap including a conductor in electrical contact with said elongated conductor to monitor continuity along said electrical path.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |