Patent US3798417A successfully refreshed from Google Patents.
US3798417A
Expired / Lapsed
US
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Heating element assembly
Assignee: EHD Inc
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Filing: 1973-07-12
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Granted: 1974-03-19
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Expires: 1993-07-12
Abstract
Abstract An electric heating assembly for a moving air system is described in which heating elements include thin strips of apertured, foil-like material. These elements are supported in linear reaches and arranged for an efficient element-to-space occupation ratio. The foil of the elements is a mesh that is supported in linear reaches by a plurality of insulators which are adjustably connected to a support rod. When the insulators are fixed in position, they rigidly immobilize the foil relative to the rod. According to one aspect of the invention, the linear reaches are flat. According to another aspect of the invention, the linear reaches are provided with a longitudinal fold to thereby stiffen the reach and minimize the number of supporting insulators along the reach.
Inventors
- 👤 W Bittner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:57
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/32
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A resistance heating element comprising: a. support rod means; b. a plurality of insulators connected to said support rod means and angularly related thereto, said insulators being substantially symmetrical about said support rod means; c. connecting means including clips between said support rod means and each insulator preventing axial and rotational movement of each insulator relative to said support rod means; and d. thin strips of apertured, foil-like, electrical resistance material retained and supported by said insulators on either side of the support rod means in linear reaches between adjacent insulators.
Claim 2
Dependent Claim
91 words
A resistance heating element comprising: a. support rod means; b. a plurality of insulators connected to said support rod means and angularly related thereto, said insulators being substantially symmetrical about said support rod means; c. connecting means including clips between said support rod means and each insulator preventing axial and rotational movement of each insulator relative to said support rod means; and d. thin strips of apertured, foil-like, electrical resistance material retained and supported by said insulators on either side of the support rod means in linear reaches between adjacent insulators.
Claim 3
Dependent Claim
40 words
A resistance heating element as set forth in claim 1, wherein said resistance material is attached to said insulators by clips extending through said material and through aperture means in said insulators to clamp said resistance material to said insulators.
Claim 4
Dependent Claim
29 words
A resistance heating element as set forth in claim 1, wherein each linear reach is defined by a plane parallel to the longitudinal axis of said support rod means.
Claim 5
Dependent Claim
39 words
A resistance heating element as set forth in claim 1, wherein said insulators are rectangular and are substantially perpendicular to said support rod means and the resistance material is immobilized in a plane along one edge of said insulators.
Claim 6
Dependent Claim
28 words
A resistance heating element according to claim 1 wherein each strip of said foil-like, electrical resistance material has at least one axially extending longitudinal corrugation along its length.
Claim 7
Dependent Claim
35 words
A resistance heating element as set forth in claim 5, wherein said insulators include inwardly extending slot means in at least one end thereof and wherein said resistance material is received within said slot means.
Claim 8
Dependent Claim
59 words
A resistance heating element according to claim 5, wherein said insulators include inwardly extending slot means in at least one end thereof and wherein a portion of said resistance material is received and immobilized within said slot means and another portion of said material is folded over and immobilized on one edge of said insulator to form said corrugation.
Claim 9
Dependent Claim
72 words
A resistance heating element according to claim 1 wherein each insulator has inwardly extending slot means in at least one end thereof and wherein each strip of apertured, foil-like, electrical resistance material is trained in a first linear reach over one edge of each insulator, then in a second parallel linear reach through said slot meAns, and then in a third parallel linear reach over a second opposite edge of each insulator.
Claim 10
Dependent Claim
143 words
A resistance heating element assembly according to claim 1 wherein said support rod means includes a plurality of spaced, parallel support rods fixed at one end to a base plate, a plurality of said insulators connected to each support rod and angularly related thereto, connecting means including said clips between each support rod and its insulators preventing axial and rotational movement of each insulator relative to its support rod, said thin strips of apertured, foil-like, electrical resistance material being retained and supported by the insulators on each support rod in linear reaches, and including means electrically connecting a linear reach of resistance material retained and supported along the insulators of one support rod to a linear reach of resistance material retained and supported along the insulators of another support rod, and means for spacing and retaining the other ends of the support rods.
Claim 11
Dependent Claim
115 words
A resistance heating element assembly comprising: a. support rod means; b. a plurality of insulators fixed to said support rod means and angularly related thereto, said insulators being substantially symmetrical about said support rod means; c. connecting means between said support rod means and each insulator preventing axial and rotational movement of each insulator relative to said support rod means, said connecting means comprising a V-shaped clip having apertures in each leg of the V through which said support rod passes, said legs being biased apart to grip said support rod; and d. thin strips of apertured; foil-like electrical resistance material retained and supported by said insulators on either side of the support rod means.
Claim 12
Dependent Claim
115 words
A resistance heating element assembly comprising: a. support rod means; b. a plurality of insulators fixed to said support rod means and angularly related thereto, said insulators being substantially symmetrical about said support rod means; c. connecting means between said support rod means and each insulator preventing axial and rotational movement of each insulator relative to said support rod means, said connecting means comprising a V-shaped clip having apertures in each leg of the V through which said support rod passes, said legs being biased apart to grip said support rod; and d. thin strips of apertured; foil-like electrical resistance material retained and supported by said insulators on either side of the support rod means.
Claim 13
Dependent Claim
21 words
A resistance heating assembly according to claim 10, wherein said support rod is serrated and wherein said legs engage said serrations.
Claim 14
Dependent Claim
44 words
A resistance heating assembly according to claim 10, wherein said insulator comprises an insulation block and wherein an extended apex portion of said V-shaped clip is clamped over said block to fix said insulator to said connecting means, and therefore to said support rod.
Claim 15
Dependent Claim
28 words
A resistance heating element as set forth in claim 10, wherein said electric resistance material is retained and supported by said insulators in linear reaches between adjacent insulators.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |