US1188972A - Electric heating element. - Google Patents

Description

I F. w. MOFFAT. ELECTRIC HEATING ELEMENT.

APPLICATION FILED APR-20,1916- I Patented June 27, 1916.

. 11v vw 7-05.

WfT/VE55E5.

UNITED STATES PATENT OFFICE.

FREDERICK W. MOFFAT, OF WESTON, ONTARIO, CANADA, ASSIGNOR TO MOFFAT STOVE COMPANY OF WESTON, LIMITED, 0F WESTON, ONTARIO, CANADA.

nnncrmc HEATING ELEMENT.

To all whom it may concern:

Be it known that I, FREDERICK W. MOF- FAT, of the town of Weston, in the county of York, Province of Ontario, Canada, a subject of the King of Great Britain, have-invented certain new and useful Improvements in Electric Heating Elements, of

V which the following is'a specification.

This invention relates to heating elements specially adapted for use in the broiling oven of an electric stove, and my object is to devise a cheap, easily constructed and as sembled element, which is easily repaired.

I attain my object by means of the constructions hereinafter described and as illustrated in the accompanying drawings in Figure 1 is a plan view of the improved element; Fig. 2 an end elevation of part of the same; Fig. 3 a sectional detail of part of the base plate and one of the supporting bars; and Fig. 4 a perspective detail of one of the guide ways or sockets for holding the supporting bars.

In the drawings like numerals of refer- .ence indicate corresponding parts in the different figures.

1 is a metallic base plate which may be of any suitable shape for use in or connection with an oven, though it is understood, of course, that the element may be used in the open as a hot plate if desired. To this base plate are secured a plurality of guide ways. These guide ways are preferably formed of sheet metal and areieach provided with the bottom 2, upwardly extending sides 3 and inwardly turned flanges 4 on the sides.

Ends 5 are also formed integral with the resistance 8 is threaded. The lower edge of the bar is laterally projected preferably in T form to fit the guide way 9 on to which the bar is fitted. It is evident, of course,

that any undercut form of guide way might Specification of Letters Patent.

Patented June 27, 1916.

Application filed April 20, 1916. Serial No. 92,455.

tactin'g in any way with thebase of the guide way, I preferably form on each supporting bar between the holes and the T-shaped bottom the laterally extending flanges 10. The outer guide ways are also provided with outwardly directed fingers 11 between the holes. The resistance wire at the ends can be passed alternately above and below these fingers, which keep the wires Where they overlap entirely separated. This arrangement is both simple and effective.

In the drawings the resistance is shown as wound for three heats, but of course any desired form of winding may be adopted.

What I claim as my invention is:

1. In an electric heating element, the combination of a metallic base plate; a plurality of undercut guideways on said base plate; and supporting bars for an electric resistance adapted to slide into and engage said guideways. i

2. In an electric heating element, the combination of a metallic base plate; a plurality of undercut guideways on said base plate; and sectional supporting bars for an electric resistance adapted to slide into and engage said guideways.

3. In'an electric heating element, the combination of a sheet metal base plate: sheet metal guideways each formed of a bottom secured to the base plate and sides formed with inwardly projecting flanges; and supporting bars for an electric resistance provided with T-projections adapted to slide into said guideways.

4. In an electric heating element, the combination of a sheet metal base plate; sheet metal guideways each formed of a bottom secured to the base plate. ends adapted to be bent up, and sides formed with inwardly projecting flanges: and supporting bars for an electric resistance provided with T-projections' adapted to slide into said bination of a sheet .metal base plate; sheet metal guideways each formed of a bottom secured to the base plate, ends adapted to be bent up, and sides formed with inwardly projecting flanges; and sectional supporting bars for an electric resistance provided with 'T-projections adapted to slide into said guideways and to be held therein by the said ends when the latter are bent up.

7. In an electric heating element, the combination of a metallic base plate; a plurality of undercut guideways on said base plate; and insulating supporting bars foran electric reslstance adapted to slide into and engage said guideways, each bar having a series of holes formed therein for the passage of' the resistance and the ouside bars having laterally and outwardly projecting fingers between the holes.

8. In an electric heating element, a resistance supporting bar of insulating material having toward one edge a series of holes therein for the passage of the resistance, provided with lateral enlargements adjacent the other edge for engagement with .an undercut guideway, and provided with a laterally projecting flange at each side below the holes.

9. In an electric heating element, a resist ance supporting bar of insulating material having toward. one edge a series of holes therein for the passage of the resistance, provided with lateral enlargements adjacent the other edge for engagement with an undercut guideway, and provided with 8. laterall 'projectin flange at each side below the oles and laterally" projecting fingers at one side between the holes.

10. In an electric heating element, aresistance supporting bar of insulating material having toward one edge a series of holes therein for the passage of the resistance, provided with lateral enlargements adj acent the other edge for engagement with an undercut guideway and laterally projectin fingers at one side between the holes.

- igned at Toronto this 10th day of April A. D. 1916, in the presence of the two undersigned witnesses.

FREDERICK w.- MOFFAT.

Witnesses: i

J. Enw. MAYBEE, E. P. HALL.

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