Patent US3720399A successfully refreshed from Google Patents.
US3720399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grounding device for bundle conductor stringing blocks
Assignee: Sherman and Reilly Inc
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Filing: 1970-10-27
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Granted: 1973-03-13
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Expires: 1990-10-27
Abstract
Abstract Grounding device for a bundle stringing block having a plurality of coaxial sheaves rotatably supported by a frame which comprises a metal grounding roller spaced from the periphery and aligned with each sheave, a laterally extending shaft rotatably supporting the grounding rollers, an arm articulately connected with each end of the roller shaft and pivoted on the frame coaxially with the sheaves, springs connected at their upper ends to the frame and at their lower ends to each arm at a point between its pivot and the roller shaft and offset downwardly to provide a moment arm about the roller arm pivot variable in length in response to roller arm movement to maintain substantially constant the lifting force on each grounding roller despite relative variations in conductor tensions, and means for electrically connecting a roller arm with the roller shaft.
Inventors
- 👤 H Bozeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:11
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H01; H01R; H01R4/00; H01R4/58; H01R4/64; H02; H02G; H02G1/00; H02G1/02; H02G1/04; Y; Y10; Y10S; Y10S254/00; Y10S254/11
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A grounding device for a bundle stringing block having a supporting frame, a plurality of coaxial sheaves and laterally extending shaft means for rotatably supporting said sheaves on said frame; comprising a pair of roller arms rotatably supported by said frame laterally outwardly of said sheaves, a metal grounding roller aligned with each of said sheaves, a roller shaft for rotatably supporting and electrically connected to said rollers, means interconnecting said roller shaft and said arms to support said shaft for swinging movements peripherally of said sheaves, resilient means interconnecting said frame and each of said arms to impose a predetermined lifting force on the latter, and means for electrically connecting said roller shaft with a said arm.
Claim 2
Dependent Claim
118 words
A grounding device for a bundle stringing block having a supporting frame, a plurality of coaxial sheaves and laterally extending shaft means for rotatably supporting said sheaves on said frame; comprising a pair of roller arms rotatably supported by said frame laterally outwardly of said sheaves, a metal grounding roller aligned with each of said sheaves, a roller shaft for rotatably supporting and electrically connected to said rollers, means interconnecting said roller shaft and said arms to support said shaft for swinging movements peripherally of said sheaves, resilient means interconnecting said frame and each of said arms to impose a predetermined lifting force on the latter, and means for electrically connecting said roller shaft with a said arm.
Claim 3
Dependent Claim
118 words
A grounding device for a bundle stringing block having a supporting frame, a plurality of coaxial sheaves and laterally extending shaft means for rotatably supporting said sheaves on said frame; comprising a pair of roller arms rotatably supported by said frame laterally outwardly of said sheaves, a metal grounding roller aligned with each of said sheaves, a roller shaft for rotatably supporting and electrically connected to said rollers, means interconnecting said roller shaft and said arms to support said shaft for swinging movements peripherally of said sheaves, resilient means interconnecting said frame and each of said arms to impose a predetermined lifting force on the latter, and means for electrically connecting said roller shaft with a said arm.
Claim 4
Dependent Claim
118 words
A grounding device for a bundle stringing block having a supporting frame, a plurality of coaxial sheaves and laterally extending shaft means for rotatably supporting said sheaves on said frame; comprising a pair of roller arms rotatably supported by said frame laterally outwardly of said sheaves, a metal grounding roller aligned with each of said sheaves, a roller shaft for rotatably supporting and electrically connected to said rollers, means interconnecting said roller shaft and said arms to support said shaft for swinging movements peripherally of said sheaves, resilient means interconnecting said frame and each of said arms to impose a predetermined lifting force on the latter, and means for electrically connecting said roller shaft with a said arm.
Claim 5
Dependent Claim
38 words
A grounding device according to claim 1, wherein said interconnecting means comprises an articulated connection between said roller shaft and each of said arms to automatically compensate for varying forces applied to different ones of said grounding rollers.
Claim 6
Dependent Claim
51 words
A grounding device according to claim 2, wherein the interconnection of said resilient means between said frame and each of said arms maintains said predetermined lifting force substantially constant regardless of the peripheral positions of said grounding rollers relative to said sheaves within the normal range of movement of said arms.
Claim 7
Dependent Claim
74 words
A grounding device according to claim 2, wherein each said articulated connection comprises a laterally extending bore through one end porTion of a said arm for loosely receiving said roller shaft, and a pin extending through said shaft and said arm at right angles to the longitudinal axes thereof, the outer ends of said bore being enlarged to facilitate pivotal movements of said shaft relative to said arm about the axis of said pin.
References Cited (Backward Citations)
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |