US1320155A - Electrical heating unit - Google Patents
Electrical heating unit Download PDFInfo
- Publication number
- US1320155A US1320155A US1320155DA US1320155A US 1320155 A US1320155 A US 1320155A US 1320155D A US1320155D A US 1320155DA US 1320155 A US1320155 A US 1320155A
- Authority
- US
- United States
- Prior art keywords
- bars
- resistor
- electrical heating
- heating unit
- apertures
- 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
- 238000010438 heat treatment Methods 0.000 title description 6
- 239000012212 insulator Substances 0.000 description 12
- 239000002184 metal Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 241000557622 Garrulus glandarius Species 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
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
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/32—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulators on a metallic frame
Definitions
- the invention relates to electrical heating units of the exposed resistor type, and has particular reference to the means employed for supporting, insulating and guarding the resistor and its terminal connections as hereinafter set forth.
- Figure 1 is a perspective view of a unit specifically designed for use in a toaster
- Fig. 2 is an enlarged cross-section, showing one of the insulator supports for the resistor in side elevation;
- Fig. 3 is a cross-section on line a7w Fig. 2;
- Fig. 4c is a cross-section showing the terminal connection.
- A is a, frame formed from a sheet-metal plate having its ed es returnbent atB to form marginal rein orcements.
- the plate is also cut away to form a series of bars C, which are twisted to extend in a transverse plane,
- Each of the bars C is pressed to form on one side thereof a series of embossed portions D with recesses E upon the opposite side, and with apertures F centrally of and concentric with said bosses and recesses.
- G are insulator disks located in the recesses E and provided with apertures of smaller diameter than the apertures F.
- H are corresponding insulator disks placed on the opposite or embossed side of the bar, and I are hollow rivets or bushings passing through the apertures'in the insulator disks and securing the same to the bars.
- the hollow rivets 0r bushings I are held centrally of the apertures F so as to be out of metallic contact with the bars C. This will thoroughly insulate the bushings and will permit of threading a naked resistor J therethrough and extending the same back and forth across the frame.
- the resistor J is in the form of a coil and is looped back and forth between pairs of bars C C and C C the terminal ends being attached to terminal contact pins K.
- pins are secured to and insulated from the frame A by a similar'construction to that used for insulating the resistor, comprising an embossed portion L with an insulator M in the recess and an insulator N on the opposite side thereof.
- Connector bars P extend upward from the contact pins and are secured to the ends of the resistor.
- a sheet-metal grid having the bars thereof integral and twisted to extend in a plane transverse to that of the blank, said bars being apertured, insulated bushings in said apertures, and a coiled resistor extending through said bushings and supported thereby.
- a resistor sup port comprising a grid having bars thereof twisted into planes transverse to that of the blank, said bars being apertured, the mar- .gin of said grid being reinforced and one side having an extension forming a terminal support, insulated bushings in the apertures in said bars, 'a resistor threaded through said bushings, terminals mounted on the extension of the grid and insulated therefrom, and connectors between said terminals and the ends of the resistor.
- a resistor support comprising a sheet-metal plate fash ioned to form a series of integral twisted cross-bars each extending in a plane transverse to the plane o'f the sheet, and integral connecting end pieces for said crossbars.
Description
F. KUHN AND .I. A. HAND.
ELECTRLGAL HEATING UNIT.
APPLICA'I'iON FILED JAN-25. I917.
1,320,155. Patented Oct. 28,1919.
attomoqs UNITED STATES PATENT ()FFICE.
FRANK KUHN AND JAY A. HAND, 0F DETROIT, MICHIGAN ,ASSIGNORS TO AMERICAN ELECTRICAL HEATER COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.
ELECTRICAL HEATING UNIT.
Specification of Letters Patent.
Patented Oct. 28, 1919.
Application filed January 25,1917. Serial No. 144,368.
To all whom it mag concern Be it known that we, FRANK KUHN and JAY A. HAND, both citizens of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Electrical Heating Units, of which the following is a specification, "reference being had therein to the accompanying drawings. v
The invention relates to electrical heating units of the exposed resistor type, and has particular reference to the means employed for supporting, insulating and guarding the resistor and its terminal connections as hereinafter set forth.
In the drawings:
Figure 1 is a perspective view of a unit specifically designed for use in a toaster;
Fig. 2 is an enlarged cross-section, showing one of the insulator supports for the resistor in side elevation;
Fig. 3 is a cross-section on line a7w Fig. 2;
Fig. 4c is a cross-section showing the terminal connection.
In the construction shown in Fig. 1, A is a, frame formed from a sheet-metal plate having its ed es returnbent atB to form marginal rein orcements. The plate is also cut away to form a series of bars C, which are twisted to extend in a transverse plane,
preferably at right angles to the plane of the blank. Each of the bars C is pressed to form on one side thereof a series of embossed portions D with recesses E upon the opposite side, and with apertures F centrally of and concentric with said bosses and recesses. G are insulator disks located in the recesses E and provided with apertures of smaller diameter than the apertures F. H are corresponding insulator disks placed on the opposite or embossed side of the bar, and I are hollow rivets or bushings passing through the apertures'in the insulator disks and securing the same to the bars. By reason of the fact that the disks G are held from displacement by the recesses in which they are located, the hollow rivets 0r bushings I are held centrally of the apertures F so as to be out of metallic contact with the bars C. This will thoroughly insulate the bushings and will permit of threading a naked resistor J therethrough and extending the same back and forth across the frame. Preferably the resistor J is in the form of a coil and is looped back and forth between pairs of bars C C and C C the terminal ends being attached to terminal contact pins K. These pins are secured to and insulated from the frame A by a similar'construction to that used for insulating the resistor, comprising an embossed portion L with an insulator M in the recess and an insulator N on the opposite side thereof. Connector bars P extend upward from the contact pins and are secured to the ends of the resistor.
What we claim as our invention is:
1. In an electrical heater, a sheet-metal grid, having the bars thereof integral and twisted to extend in a plane transverse to that of the blank, said bars being apertured, insulated bushings in said apertures, and a coiled resistor extending through said bushings and supported thereby.
2. In an electrical heater, a resistor sup port, comprising a grid having bars thereof twisted into planes transverse to that of the blank, said bars being apertured, the mar- .gin of said grid being reinforced and one side having an extension forming a terminal support, insulated bushings in the apertures in said bars, 'a resistor threaded through said bushings, terminals mounted on the extension of the grid and insulated therefrom, and connectors between said terminals and the ends of the resistor.
3. In an electrical heater, a resistor support, comprising a sheet-metal plate fash ioned to form a series of integral twisted cross-bars each extending in a plane transverse to the plane o'f the sheet, and integral connecting end pieces for said crossbars.
In testimony whereof we affix our signatures in presence of two witnesses.
FRANK KUHN. JAY A. HAND.
Witnesses:
HARRY W. LUYCKX, ARCHIE OAKES.
Publications (1)
Publication Number | Publication Date |
---|---|
US1320155A true US1320155A (en) | 1919-10-28 |
Family
ID=3387624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1320155D Expired - Lifetime US1320155A (en) | Electrical heating unit |
Country Status (1)
Country | Link |
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US (1) | US1320155A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3119923A (en) * | 1962-01-10 | 1964-01-28 | Francis J Gorman | Electric stove |
US6020577A (en) * | 1998-01-19 | 2000-02-01 | Industrial Engineering And Equipment Company | Electric heating element support structures and method of making same |
-
0
- US US1320155D patent/US1320155A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3119923A (en) * | 1962-01-10 | 1964-01-28 | Francis J Gorman | Electric stove |
US6020577A (en) * | 1998-01-19 | 2000-02-01 | Industrial Engineering And Equipment Company | Electric heating element support structures and method of making same |
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