US1077676A - Electric heater. - Google Patents

Description

A. S. CUBITT.

ELECTRIC HEATER.

APPLICATION FILED $21 121, 1910.

1,077,676. Patented Nov 4, 1913.

Witnesses: Inventor:

/7 2% J24 fi chibald S.Cubitt,

'His Dfttorneg.

srn rns PATENTOFFIOE.

' 'nwmmwsgcumm, or err'rsrrrnn, MASSACHUSETTS, AssreNon TO GENERAL nnnc'rnrc COMPANY; -A conrona'rronor NEW-YORK,

w a nnnornron narnn.

. Specification of Letterslatent.

To all it may concern:

Be. itkuownthatl, ARoHmALo S. Comm,

1 a subject of the King of Great Britain, re- .f

siding at Pittsfield, county of Berkshire,

State of- Massachusetts, haveinvented cer.,

, tain' new and useful Improvements in,E lectrio 'Heaters, of whiohthe following is a specifi e oe.

; invention relates to electric heaters and has for its objectthe provision of an im proved selgfi-contained -electric heating unit which may be used either separately. or com-- and inexpensive heater;

- "provide a self-contained heating unit WhlCll bined withfother's-to form a simple, efficient One of the oblects ofmy invention is will be simple and rugged in construction and which will be adapted to a varlety ot uses either singly or in combination with other units of similar construction.

Another object of my invention 1s to provide an electric heater which is composedof sections, each section being a self-contained heating unit, .the arrangement being such that any desired number of the sections may be combined to form a heater of any desired size or capacity.

In .carryingout my lnvention 1 form a unit by securing a resistance conductor to an elongated support which partially in closes the conductor. In one form of my invention I provide an elongated trough.

which may be U-shaped or channel shaped in. sectiongand secure a resistance conductor wound into 'a spiral centrally within the trough but out of direct, contact tllBIEBWlthl This trough maybe conveniently made by bending a strip of metal into the desired form and enameling the metal either before or after the bending operation. The resist 'ance spiral is '.'supported at intervals throughout its length and electa=ica1 connec tions are made at the ends of the spirals. The units may be placed side b sideand secured together so as to provi e a plurality of parallel resistance spirals which are separated from each other bythesides of" the I troughs. Any desired number of these units maybe secured together,- and thus any size or capacity of heater may be lformed.

Otherobjects and purposes of my invention will appear in the course of the following specification, in which I have shown i purposes of illustration.

In the drawing illustrating one form of PatentedNom el, 1913.

Applicetimi. filed September 21, 191a, s r alize. 5 3,92 1

= my invention, Figure 1 is .a perspective View iof aportion. of myheating unit; Fig. 2 isv ta fragmentary sectional view of the same; @Fig. 3 is a perspective view of one of the supporting members; and Fig. l is a pergspective View of a heater formed of a plurality of units.

i Referring to the drawings, 10 represents ia support for the resistance conductor.

i Thissupport-is made in the-form of an, eloni gated channel shaped tr 0ugh.,. This trough 3 may be, and preferably ismade of enameled metal, since the metal is, conveniently bent in desired form andtheenamel affords elec-J trieal insulation and likewise prevents rusting, etc. Within this. trough 10 I secure the resistance conductor 11, which conductor is I shown in the form offa spiral extending sub stantially throughout the length of the trough. The spiral is supported at intervals by supporting members '12. These support ing members consist'of a sleeve. portion 13 through which the spiral passes and a shank 14 which passes through the web member of the channel shaped trough. The end of the shank is split 50 as to provide wings 15 which are bent down to secure the member in place. The metal of the trough is pressed inward at 16 around the holefor receiving the supporting member and an insulating sleeve '17 is fitted in the depression. An insulating Washer '18 is on the'inner side of the depression. The shoulders19 on the supporting member bear against the washer 18 and when the Wings 15 are bent-down, as shown in Fig. 2, the support is held securely in place. The supportin member is thus insulated from the metal -ic trough andthe enamel coating of the trough is not depended upon for the necessary insulation. The ends of the spiral are connected to .ter-

minals 20 which are secured in place by bolts 21.- The spiral is supported substan-- In Fig. 4 I have "shown anumber of these units united so as to form a heater. The

units are placed side by side and secured together by a strip 22. It is obvious that the number of these strips 22 for holding the units together will depend upon the'length of the unit. The ends of the spirals in the adjacent troughs are connected together by connectors 23. These connections may be -made so that all of the spirals will be in series, or in any manner desired. By the employment of my invention any desired size or capacity of heater may be obtained by combining a suitable number of sections.

My invention will be found useful in connection with ovens, broilers and the like where it is desired that the unit be accessible and at the same time protected By Will suggest themselves to those skilled in the art Without departing from the spirit of my invention, the scope of which is set forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the United States, is,-

1. An electric heating unit comprising a channel shaped support, an electrical resistance suspended within said support from the web member thereof, and terminals for said resistance extending through the suspending member.

2. An electric heating unit comprising a channel shaped support, an electrical resistance coil suspended with-in said support from the Web member thereof, means for insulating the said coil from said support and terminals extending from coil through the suspending member.

. 3. A sectional electric heater comprising a plurality of channel shaped supports, each having an electrical resistance suspended within the same from the Web member there. of and insulated therefrom, terminals connected to each of said resistances extending" through the web members of said supports and means for mechanically connecting said members together.

In Witness whereof, I have hereunto set my hand this 16th day of September, 1910..

ARCHIBALD S. CUBITT.

Witnesses:

FREDERICK M. VOGEL, J. G. Mnsonovn.

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