Patent US3834524A successfully refreshed from Google Patents.
US3834524A
Expired / Lapsed
US
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Conductor loops for ascertaining damage in steel cable reinforced conveyer belts
Assignee: Bergwerksverband GmbH
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Filing: 1972-05-31
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Granted: 1974-09-10
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Expires: 1992-05-31
Abstract
Abstract An arrangement for ascertaining damage in a steel cable reinforced conveyer belt in which a plurality of conductor loops are arranged spaced from each other along the conveyer belt and in which each of the conductor loops is formed by a pair of conductor bridges and portion of two different cables of the belt between opposite ends of the bridges which are respectively electrically and mechanically connected to these cables. Damage of any of these bridges will result in signals in a receiver device outside the belt and electromagnetically coupled with the loops, when the damaged loop is located within the effective range of a transmitter and a receiver device.
Inventors
- 👤 W Ratz
- 👤 W Laval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:17
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
In an arrangement for ascertaining damage in a reinforced conveyor belt, a combination comprising a conveyor belt having longitudinally extending and transversely spaced steel cables embedded in insulating material; a plurality of closed conductor loops arranged spaced from each other in longitudinal direction of said belt, each of said conductor loops comprising a pair of conductor bridges extending transverse to the elongation of said conveyor belt and spaced from each other in the longitudinal direction of said belt between two transversely spaced steel cables and being at opposite ends mechanically and electrically connected to said transversely spaced steel cables to form with portions of said cables between said connected ends said closed conductor loops; and stationary transmitter and receiver means adjacent said belts and operative to provide a signal upon destruction of any of said conductor loops.
Claim 2
Dependent Claim
137 words
In an arrangement for ascertaining damage in a reinforced conveyor belt, a combination comprising a conveyor belt having longitudinally extending and transversely spaced steel cables embedded in insulating material; a plurality of closed conductor loops arranged spaced from each other in longitudinal direction of said belt, each of said conductor loops comprising a pair of conductor bridges extending transverse to the elongation of said conveyor belt and spaced from each other in the longitudinal direction of said belt between two transversely spaced steel cables and being at opposite ends mechanically and electrically connected to said transversely spaced steel cables to form with portions of said cables between said connected ends said closed conductor loops; and stationary transmitter and receiver means adjacent said belts and operative to provide a signal upon destruction of any of said conductor loops.
Claim 3
Dependent Claim
33 words
A combination as defined in claim 1, wherein said cables to which the ends of said conductor bridges are connected are located in the region of opposite longitudinal edges of said conveyer belt.
Claim 4
Dependent Claim
36 words
A combination as defined in claim 2, wherein the conductor bridges of adjacent loops are connected at opposite ends respectively to the same cables and wherein the minimum distance between the adjacent loops is 8 metEr.
Claim 5
Dependent Claim
53 words
A combination as defined in claim 2, wherein the conductor bridges of one of a pair of adjacent loops are connected at opposite ends respectively to different cables than the conductor bridges of the other of the pair of adjacent loops, and wherein the minimum distance between said adjacent loops is 3-4 meters.
Claim 6
Dependent Claim
22 words
A combination as defined in claim 1, wherein the conductor bridges of each loop are spaced about 10-100 centimeters from each other.
Claim 7
Dependent Claim
20 words
A combination as defined in claim 5, wherein the conductor bridges of each loop extends substantially parallel to each other.
Claim 8
Dependent Claim
26 words
A combination as defined in claim 6, wherein the conductor bridges of each loop extend substantially normal to the direction of elongation of the conveyor belt.
Claim 9
Dependent Claim
24 words
A combination as defined in claim 1, wherein the conductor bridges of each loop extend inclined at an angle with respect to each other.
Claim 10
Dependent Claim
33 words
A combination as defined in claim 8, wherein the conductor bridges of each loop are connected at one of the ends thereof at the same point to one of the said two cables.
References Cited (Backward Citations)
US3602360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |