Patent US3834518A successfully refreshed from Google Patents.
US3834518A
Expired / Lapsed
US
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Electrical conductor element for checking possible damage to conveyor belts, and conveyor belt equipped with such conductor element
Assignee: Continental AG
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Filing: 1973-10-02
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Granted: 1974-09-10
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Expires: 1993-10-02
Abstract
Abstract An electric conductor element for insertion into a conveyor belt for checking possible damage thereto, such as slits and cracks, which includes a metallic wire cable comprising a plurality of wire strands and being shaped in the form of a loop while having its ends spliced together over a length of from one-twentieth to approximately one-tenth of the circumference of the finished loop. The spliced strand ends are twisted to each other and protrude laterally from the remainder of the conductor element. The invention also includes a conveyor belt of elastomeric material having reinforcing strength carriers extending in the longitudinal direction of the belt and spaced from each other in a direction transverse to the longitudinal direction of the belt, while a plurality of loop-shaped conductor elements of the abovementioned type are imbedded in the belt and located in a plane at least approximately parallel to the surface of the belt and in spaced relationship to the strength carriers, said loop-shaped conductor elements being distributed over the length of the belt in spaced relationship to each other.
Inventors
- 👤 H Specht
- 👤 B Kroll
- 👤 A Gruttner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:31
CPC Classifications
H; H01; H01B; H01B5/00; H01B5/08; B; B65; B65G; B65G43/00; B65G43/02; D; D07; D07B; D07B7/00; D07B7/16; D07B7/169; D07B1/00; D07B1/14; D07B1/145
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
An electric conductor element for insertion into a conveyor belt, for checking possible damage thereto, especially in the form of slits and cracks, which includes a metallic wire cable comprising a plurality of wire strands and being shaped in the form of a loop by having its ends spliced together over a length of from one-twentieth to approximately one-tenth of the circumference of the finished loop, the spliced strand ends being twisted to each other and protruding laterally from the remainder of said conductor element.
Claim 2
Dependent Claim
85 words
An electric conductor element for insertion into a conveyor belt, for checking possible damage thereto, especially in the form of slits and cracks, which includes a metallic wire cable comprising a plurality of wire strands and being shaped in the form of a loop by having its ends spliced together over a length of from one-twentieth to approximately one-tenth of the circumference of the finished loop, the spliced strand ends being twisted to each other and protruding laterally from the remainder of said conductor element.
Claim 3
Dependent Claim
39 words
An electric conductor element according to claim 1, in which the twisted protruding strand ends have a length which counted from the outer circumference of the conductor element amounts to approximately at least the diameter of said conductor element.
Claim 4
Dependent Claim
28 words
An electric conductor element according to claim 1, in which at least 10 strands ends protrudcing outwardly from the conductor element are distributed over the total splice length.
Claim 5
Dependent Claim
17 words
An electric conductor element according to claim 1, in which the loop-sHaped spliced conductor element is brass-plated.
Claim 6
Dependent Claim
76 words
An electric conductor element according to claim 1, in which the loop-shaped conductor element comprises a core strand and a plurality of outer strands of round copper wire with said outer strands loosely twisted together about said core strand, said outer strands and said core strand being formed by a three-step twisting operation, and the over-all diameter of said loop-shaped conductor element equalling approximately from 40 to 50 times the diameter of the individual copper wire.
Claim 7
Dependent Claim
28 words
An electric conductor element according to claim 5, in which the conductor loop comprises six outer strands respectively composed of three individual strands and surrounding said core strand.
Claim 8
Dependent Claim
22 words
An electric conductor element according to claim 6, in which each of said individual strands comprises from 25 to 40 copper wires.
Claim 9
Dependent Claim
19 words
An electric conductor element according to claim 5, in which said copper wires are provided with a tin coating.
Claim 10
Dependent Claim
19 words
An electric conductor element according to claim 1, in which the loop-shaped conductor element has an outer brass cover.
Claim 11
Dependent Claim
152 words
A conveyor belt of elastomeric material, which includes reinforcing strength carriers extending in the longitudinal direction of said belt and spaced from each other in a direction transverse to the longitudinal direction of said belt, and a plurality of loop-shaped conductor elements imbedded in said belt and located in a plane at least approximately parallel to the surface of said belt and in spaced relationship to said strength carriers while being distributed over the length of said belt and spaced from each other in the direction of the length of said belt, each of said loop-shaped conductor elements comprising a core strand and a plurality of outer strands of round copper wire with said outer strands loosely twisted about said core strand being formed by a three-step twisting operation, and the over-all diameter of said loop-shaped conductor element equalling approximately from 40 to 50 times the diameter of the individual copper wire.
Claim 12
Dependent Claim
152 words
A conveyor belt of elastomeric material, which includes reinforcing strength carriers extending in the longitudinal direction of said belt and spaced from each other in a direction transverse to the longitudinal direction of said belt, and a plurality of loop-shaped conductor elements imbedded in said belt and located in a plane at least approximately parallel to the surface of said belt and in spaced relationship to said strength carriers while being distributed over the length of said belt and spaced from each other in the direction of the length of said belt, each of said loop-shaped conductor elements comprising a core strand and a plurality of outer strands of round copper wire with said outer strands loosely twisted about said core strand being formed by a three-step twisting operation, and the over-all diameter of said loop-shaped conductor element equalling approximately from 40 to 50 times the diameter of the individual copper wire.
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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) | 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 |