US3562402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically and magnetically shielded lay-in wireway apparatus
Assignee: Federal Cartridge Corp
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Filing: 1968-07-03
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Granted: 1971-02-09
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Expires: 1988-07-03
Abstract
Abstract A shielded duct assembly comprised of a plurality of individual elements, each having completely removable cover portions to allow wires and the like to be placed or laid directly therein after the elements have been assembled to form a continuous duct. Complete magnetic and electrostatic shielding is accomplished through the establishment of a continuous current conducting path through means disposed in the sealing gaskets for the removable cover portions and intermediate adjacent individual members of the duct assembly and the further establishment of a parallel, continuous magnetic flux conductive path through the use of suitably configured joint forming members intermediate the ends of individual conduit sections whereby magnetic flux energy is shunted toward the interior of the duct in areas of flux concentration occurring at laterally outwardly opening joints, or discontinuities in the duct assembly.
Inventors
- 👤 John Michael Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:12
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0608; H02G3/04; H02G3/0406; H02G3/0418
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
A shielded duct comprising in combination; a. a plurality of magnetically and electrically conductive body members, each of said body members being open along one side thereof and having at least one open end, including flange means, engaging a like adjacent open end, including flange means, on said another body members forming a joint therebetween, said plurality of body members joined together in abutting relation forming a continuous duct that is accessible through the open side therein; b. a magnetically and electrically conductive joint sleeve member disposed interiorly of and extending longitudinally of each of the adjacent open ends and bridging said joint between said body members for a distance of at least one-half of the largest of the cross-sectional dimensions thereof, said joint sleeve having a removable top portion comprised of current conductive and magnetic energy conductive material; and c. cover means removably disposed on the side openings in each of said body members and extending intermediate the removable top portions on each of said joint sleeve members, said cover means including a first current conductive means and a second magnetic energy conductive means disposed in energy transferring relationship with the current conductive and magnetic energy conductive means on the removable top portions on said joint sleeve members and said body members.
Claim 2
Dependent Claim
213 words
A shielded duct comprising in combination; a. a plurality of magnetically and electrically conductive body members, each of said body members being open along one side thereof and having at least one open end, including flange means, engaging a like adjacent open end, including flange means, on said another body members forming a joint therebetween, said plurality of body members joined together in abutting relation forming a continuous duct that is accessible through the open side therein; b. a magnetically and electrically conductive joint sleeve member disposed interiorly of and extending longitudinally of each of the adjacent open ends and bridging said joint between said body members for a distance of at least one-half of the largest of the cross-sectional dimensions thereof, said joint sleeve having a removable top portion comprised of current conductive and magnetic energy conductive material; and c. cover means removably disposed on the side openings in each of said body members and extending intermediate the removable top portions on each of said joint sleeve members, said cover means including a first current conductive means and a second magnetic energy conductive means disposed in energy transferring relationship with the current conductive and magnetic energy conductive means on the removable top portions on said joint sleeve members and said body members.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 in which the portions of the body members adjacent the open sides thereof includes opposed flange portions.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 in which the second magnetic energy conductive means extends inwardly of the body members.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1 in which the second magnetic energy conductive means in the cover means extends inwardly of the body members.
Claim 6
Dependent Claim
32 words
The apparatus of claim 4 in which the inwardly extending portions of the second magnetic energy conductive means in the cover means extends inwardly of the open side in the body members.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |