US1119841A - Electrical heater. - Google Patents

Description

F. KUHN.

ELECTRICAL HEATER.

APPLIGATION FILED .11.11.10, 1914.

1, 1 1 9,841 Patented Dec. 8, 1914;

Mmm www www QQ@ FRANK KUHN, OF DETROIT, MIGI-IIGAN.

, ELECTRICAL HEATER.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed January 10, 1.914. Serial No. 811,313.

To all whom t may concern Be it known that I, FRANK KUHN, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have inventedcertain new and useful Improvements in Electrical Heaters, of which the following iS a specication, reference being had therein to the accompanyin drawings.

The invention relates to electrical heating units, and has more particular reference to the means for providing insulated supports for the resistor.

It is the object of the invention to obtain a construction which is inexpensive to manufacture, which is adapted to be vari.- ously fashioned to suit different conditions and which will provide thoroughly insulated, heat-resisting supports at as many points as necessary in the length of the conductor.

In the drawings: Figure 1 is an elevation showing one construction of my heating element; Fig. 2 is an enlarged cross section thereof; Fig. 3 is a cross section through a modified construction; Fig. l is a perspective view showing another modication; and Fig. 5 is a perspective View of one of the resistor supports detached.

A is the resistor which may be of any suitable construction, but is shown in the form of a wire coil.

B are supporting members for the resistor, preferably formed of sheet metal stampings having an eye portion C and shank portion D, the latter being twisted into a transverse plane. To insulate the members B-they are connected to a strip E,

with mica or other suitable insulating material F laid therebetween. Preferably, the

strip E is' formed of sheet metal and of a U-shaped cross section, and the Shanks D are placed between the two plies of the strip with the insulation F arranged therebetween, as shown. The strip E and the Shanks D are also preferably provided with complementary projections and indentations', such as the beads G and H', and which form an interlock. Thus, when the U- shaped strip E is lsuitably compressed it will form a clamp for retaining all of the supporting members B in fixed osition, while the insulation between the slfanks D and the strip E will prevent short circuit-'- ing.

`In Fig. l a straight strip is represented with a plurality of supports B distributed along the length thereof. In Fig. 3 a pair of strips E and E are arranged upon opposite sides of the supporting members B, and engage oppositely-eXtending shanks D and D thereof. In Fig 4 the strips E2 are bent into circular form and the resistor A extends back and forth across this circle, being engaged with the eyes C at different points thereon. It is obvious that the strips E may be fashioned into various shapes to support the resistor in any position desired.

at I claim as my invention is,-

An insulated support for resistor, comprising a sheet metal member for engaging the resistor, having a shank portion bent into a transverse plane, a clamping member for embracing said shank member having an interlocking engagement therewith, and insulating material arranged between said shank member and clamping strip.

2. An insulated support for resistor,

comprising a longitudinally beaded -metallic strip, a series of supporting members having beaded shank portions for engaging said beaded strip, and insulating material between said shank portions and strip.

3. An insulated support for resistor, comprising a metallic strip of U-shaped cross section, having complementary longitudi nally-extending beads, a series of supporting members provided with shank portions having complementary beads and embraced by said U-shaped strip member, and insulating material clamped between said shank portions and strip.

4. An insulated support for a resistor, comprising a sheet metal member for engaging the resistor, said member having a shank portion provided with a lateral offset, a *clamping member for embracing the shank portion of said member,'fa'nd being provided with an offset portion complementary to' that of the shank portion, an insulating material arranged between said shank portion and clamping member, said shank portion, clamping memberaand insulating material 4 being locked in place by the engagement of said complementary ofi"- set portions.

5. An insulated support for a resistor, sulating material arranged between said comprising a pair of metallic strips of U- shank members and said metallic strips. 10 shaped cross section spaced apart and open- In testimony whereof Iv ax my signaing toward each other, and a series of supture in presence of two witnesses. 5 Sorting members extending between said FRANK KUHN.

-shaped strips having shank portions em Witnesses: braced by said strip and transversely bent Y JAMES` P. BARRY,

portions for engaging the resistor, and in- HENRIETTA E. BOWMAN.

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