US4238756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance unit
Assignee: Westinghouse Electric Corp
•
Filing: 1978-12-28
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Granted: 1980-12-09
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Expires: 1998-12-28
Abstract
Abstract An electric resistance unit characterized by a support rod with a plurality of insulating refractory bodies thereon, which bodies have grooves to fit the rod, a continuous resistance winding mounted around the bodies, and flexible metal mounting means in the groove and between the rod and the bodies for retaining the bodies on the rod.
Inventors
- 👤 Ralph B. Immel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/01; H01C3/00; H01C3/14; H01C3/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
An electric resistance unit comprising an elongated support rod, the rod having a rectangular cross section with opposite side walls and opposite edges, a plurality of insulating refractory bodies on opposite edges of the rod in end-to-end abutment and arranged to substantially surround the rod, a continuous resistance winding helically mounted on and surrounding the refractory bodies, each body being a channel member having a slot to fit on the rod and having spaced legs extending over and along the opposite side walls, the corresponding legs of the channel members on opposite edges extending toward each other, flexible metal mounting means in the slot and between the rod and the bodies for retaining the bodies on the rod, and the flexible metal mounting means extending between the rod and said corresponding legs on at least one side wall of the rod.
Claim 2
Dependent Claim
141 words
An electric resistance unit comprising an elongated support rod, the rod having a rectangular cross section with opposite side walls and opposite edges, a plurality of insulating refractory bodies on opposite edges of the rod in end-to-end abutment and arranged to substantially surround the rod, a continuous resistance winding helically mounted on and surrounding the refractory bodies, each body being a channel member having a slot to fit on the rod and having spaced legs extending over and along the opposite side walls, the corresponding legs of the channel members on opposite edges extending toward each other, flexible metal mounting means in the slot and between the rod and the bodies for retaining the bodies on the rod, and the flexible metal mounting means extending between the rod and said corresponding legs on at least one side wall of the rod.
Claim 3
Dependent Claim
14 words
The unit of claim 1 in which said mounting means is a metal strip.
Claim 4
Dependent Claim
13 words
The unit of claim 2 in which said strip has a non-planar configuration.
Claim 5
Dependent Claim
13 words
The unit of claim 3 in which said strip has a sinuous configuration.
Claim 6
Dependent Claim
26 words
The unit of claim 4 in which said strip has a corrugated configuration having alternate ridges and grooves with the grooves adjacent to the support rod.
Claim 7
Dependent Claim
21 words
The unit of claim 5 in which the opposite ends of the ridges are inclined from the ends of adjacent grooves.
Claim 8
Dependent Claim
15 words
The unit of claim 4 in which the opposite ends of the ridges are beveled.
Claim 9
Dependent Claim
28 words
The unit of claim 7 in which the ridge ends are formed inward to provide inwardly inclined end portions to facilitate assembly of said bodies onto the rod.
Claim 10
Dependent Claim
16 words
The unit of claim 1 in which an adhesive is disposed between rod and the bodies.
Claim 11
Dependent Claim
28 words
The unit of claim 1 in which the metal strip comprises a multitude of lanced projections to hold the refractory bodies to the mounting bar by ratchet ction.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |