Patent US3971543A successfully refreshed from Google Patents.
US3971543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool and kit for electrical fishing
Assignee: Individual
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Filing: 1975-04-17
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Granted: 1976-07-27
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Expires: 1995-04-17
Abstract
Abstract A tool for fishing electrical wires through walls includes a magnetically attractable sensor assembly having a contactor element secured through a connecting sleeve to one end of a length of chain. The other end of the chain carries a fastener member which can be secured to a line or wire or the like for suspending the sensor assembly within a wall. A substantially hollow cylindrical member which serves as a housing for the sensor assembly when the tool is not in use has a magnet fixed within one end thereof. In use, the end of the cylindrical housing member which carries the magnet is inserted through a small hole in the wall to attract the sensor assembly which is suspended within the wall.
Inventors
- 👤 William F. Shanahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:22
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08; Y; Y10; Y10S; Y10S174/00; Y10S174/13
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A tool for fishing for electrical wires and the like comprising a magnet means and a multi-part sensor assembly; said sensor assembly comprising a chain and a rod-shaped contactor connected to one end of said chain, said chain and said rod-shaped contactor being comprised of magnetically attractable materials and being connected by a connecting sleeve which encompasses part of said contactor and part of said one end of said chain; at least some of the parts of said sensor assembly having differing magnetic properties whereby varying forces are encountered when said sensor assembly is drawn across said magnet means.
Claim 2
Dependent Claim
99 words
A tool for fishing for electrical wires and the like comprising a magnet means and a multi-part sensor assembly; said sensor assembly comprising a chain and a rod-shaped contactor connected to one end of said chain, said chain and said rod-shaped contactor being comprised of magnetically attractable materials and being connected by a connecting sleeve which encompasses part of said contactor and part of said one end of said chain; at least some of the parts of said sensor assembly having differing magnetic properties whereby varying forces are encountered when said sensor assembly is drawn across said magnet means.
Claim 3
Dependent Claim
45 words
A tool as claimed in claim 1 wherein said magnet means comprises a cylindrically-shaped substantially hollow housing member having a magnet inserted into and closing one end thereof, said housing member being adapted to house said sensor assembly when said tool is not in use.
Claim 4
Dependent Claim
22 words
A tool as claimed in claim 1 wherein said sensor assembly includes a fastener member at the other end of said chain.
Claim 5
Dependent Claim
41 words
A tool as claimed in claim 1 wherein said entire sensor assembly is magnetically attractable, that portion of the assembly encompassed by said connecting sleeve being the least magnetically attractable and said contactor being the most magnetically attractable of said parts.
References Cited (Backward Citations)
US3078073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |