US1352934A - Electric-heating body - Google Patents
Electric-heating body Download PDFInfo
- Publication number
- US1352934A US1352934A US331456A US33145619A US1352934A US 1352934 A US1352934 A US 1352934A US 331456 A US331456 A US 331456A US 33145619 A US33145619 A US 33145619A US 1352934 A US1352934 A US 1352934A
- Authority
- US
- United States
- Prior art keywords
- base
- coating
- electric
- grooves
- heating body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005485 electric heating Methods 0.000 title description 3
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010445 mica Substances 0.000 description 4
- 229910052618 mica group Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
Definitions
- the present invention relates to electric resistances; and its object, stated briefly, is to improve the construction of such elements or bodies by overcoming certain recognized defects more or less inherent therein.
- the covering of the mica or other base consists of a multitude of parallel threads which are produced-by the accumulation of the precipitated metal in relatively-deep grooves formed in the surface of the base.-
- the potential difference between any two adjacent parallel conducting threads is practically zero, provided'that the electrodes make a good contact, and consequently the current is not liable to pass transversely to the grooves.
- the metal coating is sprayed in the grooves in the base by means of one of the metal spraying devices now in use, the coating thus obtained answering all requirements both mechanically as well as electrically.
- the coating fills the grooves only, and does not cover the whole base.
- the mica base of the resistance element is indicated at 1; and 2 indicates the grooves formed in the surface of said base and in.
- An electric resistance element comprising a base formed with relatively-deep surface grooves which extend in the direction of current flow, and a coating of a heavy metal having a high fusing point filling said grooves.
- An electric resistance element comprising a base formed with relatively-deep surface grooves which extend in the direction of current flow, and a coating of a heavy metal having a high fusing point sprayed on said base so as to fill said grooves.
- An electric resistance element comprising a base, and a filiform coatin of a heavy metal having a high fusing point.
- An electric resistance element comprising a base, and a thread-like coating of a heavy metal having a high fusing point, the threads composing the coating extending over the base in the direction of flow of the current.
Description
A. ARNTZEN AND K. TROSDAHL.
ELECTRIC HEATING BODY.
APPLICATION FILED 00117. 1919.
Patented Sept. 14, 1920.
album! UNITED STATES ANDERS ARNTZEN AN'D KNUT TROSDAHL, OF SARPSBORG, NORWAY, ASSIGNORS TO PATENT OFFICE.
ELEKTRISK VARMETEKNIK .A/S., OF SARCPSBORG, NORWAY.
' Specification of Letters Patent.
Patented Sept. 14, 1920.
Application filed October 17, 1919. Serial No.'331,456.
To all whom it may concern:
Be it known that we, ANDERs AnN'rznN and KNU'r TROSDAHL, subjects of the King of Norway, residing at Sarpsborg, Norway, have invented certain new and useful Improvements in Electric Heating Bodies; and We do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
The present invention relates to electric resistances; and its object, stated briefly, is to improve the construction of such elements or bodies by overcoming certain recognized defects more or less inherent therein.
In resistance elements as now constructed, it is usual to cover a mica or similar base with a coating of heavy metal, but such construction is open to the objection that there is a tendency on the part of the current to burn off the coating transversely to the direction of current flow, and to the further objection that the thinness of the coatin renders it liable to become easily damage while the conductivity is low at points and.
unstable. Hence it follows that the current is not evenly distributed over the whole coating, but produces a greater heating at some points than at others, with the result that the durability of the element is impaired andj'even that bursting of the mica is apt to occur with a consequent opening of the circuit.-
According to the present invention, the covering of the mica or other base consists of a multitude of parallel threads which are produced-by the accumulation of the precipitated metal in relatively-deep grooves formed in the surface of the base.- The potential difference between any two adjacent parallel conducting threads is practically zero, provided'that the electrodes make a good contact, and consequently the current is not liable to pass transversely to the grooves.
It has heretofore been customary to use only graphite or a thin recipitate of silver as the coating or electro e material. But in the former case, the conductivity is greatly diminished, and in the latter case the thinness of the precipitate renders it incapable of withstanding rubbing and other mechanical actions of a like character on the part of the contacts. According to the present invention, however, the metal coating is sprayed in the grooves in the base by means of one of the metal spraying devices now in use, the coating thus obtained answering all requirements both mechanically as well as electrically. The coating fills the grooves only, and does not cover the whole base.
The accompanying drawing represents one form of resistance element constructed in accordance with the invention, Figure 1 being a plan view thereofand Fig. 2 a crosssection.
The mica base of the resistance element is indicated at 1; and 2 indicates the grooves formed in the surface of said base and in.
which the metal is sprayed to produce the multitude of threads 3 comprising the coating, the threads filling the grooves and being connected in series, as shown.
We claim as our invention 1. An electric resistance element, comprising a base formed with relatively-deep surface grooves which extend in the direction of current flow, and a coating of a heavy metal having a high fusing point filling said grooves.
2. An electric resistance element, comprising a base formed with relatively-deep surface grooves which extend in the direction of current flow, and a coating of a heavy metal having a high fusing point sprayed on said base so as to fill said grooves.
3. An electric resistance element, comprising a base, and a filiform coatin of a heavy metal having a high fusing point.
4. An electric resistance element, comprisinga base, and a thread-like coating of a heavy metal having a high fusing point, the threads composing the coating extending over the base in the direction of flow of the current.
In testimony that we claim the foregoing as our invention, we have signed our names in presence of two subscribing witnesses.
ANDERS ARNTZEN. KNUT TROSDAHL. Witnesses:
Moons Buoon, Emsn POULSSON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US331456A US1352934A (en) | 1919-10-17 | 1919-10-17 | Electric-heating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US331456A US1352934A (en) | 1919-10-17 | 1919-10-17 | Electric-heating body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1352934A true US1352934A (en) | 1920-09-14 |
Family
ID=23294049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US331456A Expired - Lifetime US1352934A (en) | 1919-10-17 | 1919-10-17 | Electric-heating body |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1352934A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2629166A (en) * | 1948-10-07 | 1953-02-24 | Int Resistance Co | Method of forming resistor assemblies |
| US2712521A (en) * | 1950-07-13 | 1955-07-05 | Voltohm Processes Ltd | Process of making bismuth resistances |
| US2744987A (en) * | 1954-03-18 | 1956-05-08 | Ohio Commw Eng Co | Electrical resistance heating elements |
| US2785997A (en) * | 1954-03-18 | 1957-03-19 | Ohio Commw Eng Co | Gas plating process |
| US5973298A (en) * | 1998-04-27 | 1999-10-26 | White Consolidated Industries, Inc. | Circular film heater and porcelain enamel cooktop |
| US6225608B1 (en) | 1999-11-30 | 2001-05-01 | White Consolidated Industries, Inc. | Circular film heater |
-
1919
- 1919-10-17 US US331456A patent/US1352934A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2629166A (en) * | 1948-10-07 | 1953-02-24 | Int Resistance Co | Method of forming resistor assemblies |
| US2712521A (en) * | 1950-07-13 | 1955-07-05 | Voltohm Processes Ltd | Process of making bismuth resistances |
| US2744987A (en) * | 1954-03-18 | 1956-05-08 | Ohio Commw Eng Co | Electrical resistance heating elements |
| US2785997A (en) * | 1954-03-18 | 1957-03-19 | Ohio Commw Eng Co | Gas plating process |
| US5973298A (en) * | 1998-04-27 | 1999-10-26 | White Consolidated Industries, Inc. | Circular film heater and porcelain enamel cooktop |
| US6225608B1 (en) | 1999-11-30 | 2001-05-01 | White Consolidated Industries, Inc. | Circular film heater |
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