Patent US4037191A successfully refreshed from Google Patents.
US4037191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft warning marker assembly for power lines
Assignee: Teck Metals Ltd
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Filing: 1976-10-04
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Granted: 1977-07-19
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Expires: 1996-10-04
Abstract
Abstract Aircraft warning marker assemblies for marking power transmission lines are often suspended from the power line itself and are in a few cases equipped with a flashing light energized with power obtained from the power line. The assemblies have in the past been subject to physical failure caused by wind induced vibrations in addition to damage from corona discharges and tracking over non conductive parts. The present invention discloses means for alleviating these problems. The marker assembly, which is made up of a cone-like structure supported by a hanger system, employs vibration absorbing means between the hanger system and the cone-like structure to dampen vibrations of the marker assembly, and thereby reduces the possibility of physical damage from the wind. In addition, a ring of electrically conductive material at the bottom of the cone functions as a "corona ring" in shielding the assembly from corona effects and tracking.
Inventors
- 👤 Richard Deane
- 👤 Aage C. Sylvest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:32
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A warning marker assembly for attachment to a power transmission line comprising a clamp that rigidly fastens to the power line and supports an inverted U-shaped flexible steel cable having two ends which hang down in parallel and each pass through an insulating tube and vibrations absorbing means, each of said ends having an abutment to support the insulating tube and vibration absorbing means, said assembly also including a truncated cone-shaped structure having an electrically conductive framework including a top plate supported by said vibration absorbing means, a bottom ring, and a plurality of ribs interconnecting the top plate and bottom ring, said framework supporting a plurality of plastic panels each extending between adjacent ribs and fitting into slots in said ribs, said assembly including an electrically conductive connection between the cable and the electrically conductive framework.
Claim 2
Dependent Claim
137 words
A warning marker assembly for attachment to a power transmission line comprising a clamp that rigidly fastens to the power line and supports an inverted U-shaped flexible steel cable having two ends which hang down in parallel and each pass through an insulating tube and vibrations absorbing means, each of said ends having an abutment to support the insulating tube and vibration absorbing means, said assembly also including a truncated cone-shaped structure having an electrically conductive framework including a top plate supported by said vibration absorbing means, a bottom ring, and a plurality of ribs interconnecting the top plate and bottom ring, said framework supporting a plurality of plastic panels each extending between adjacent ribs and fitting into slots in said ribs, said assembly including an electrically conductive connection between the cable and the electrically conductive framework.
Claim 3
Dependent Claim
21 words
A device as claimed in claim 1, wherein said conductive connection is via a flash lamp installed on said top plate.
Claim 4
Dependent Claim
20 words
A device as claimed in claim 2, wherein said conductive connection energizes a rectifier-condenser circuit which operates the flash lamp.
Claim 5
Dependent Claim
16 words
A device as claimed in claim 1, wherein the bottom ring is made of aluminum tubing.
Claim 6
Dependent Claim
18 words
A device as claimed in claim 1, wherein the top plate and the ribs are formed of aluminum.
Claim 7
Dependent Claim
55 words
A device as claimed in claim 1, wherein attached to the base of the cone at diametrically opposed sides are ropes each of which are attached at their other ends to the transmission line such that the two ropes are tied to opposite sides to the transmission line with respect to said warning marker assembly.
Claim 8
Dependent Claim
22 words
A device as claimed in claim 1, wherein the vibration absorbing means consist of pads, rings or sleeves of a flexible material.
Claim 9
Dependent Claim
14 words
A device as claimed in claim 7, wherein the flexible material is sponge rubber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |