US1844414A - Electric heater - Google Patents

Description

Feb 9, 1932- F. W WATERMAN, JR 1,844,414

ELECTRIC HEATER Filed Aug. 29, 1929 2 Sheets-Sheet l INVEPITOR Feb. 9, 1932.

F. w. WATERMAN, JR

ELECTRIC HEATER 2 sheets-sheet 2 Filed Aug. 29, 1929 Patented Feb. 9, 1932 PATENT OFFICE FREI) W. WATERMAN, JB., F JOHNSTOWN, PENNSYLVANIA ELECTRIC HEATER Application led August 29, 1929. Serial No. 389,109.

This invention relates generally to electric heaters and more particularly to such heaters having parabolic reflectors.

In accordance with my invention I provide L6 a parabolic reflector having a heating rod or resistance rod so arranged that its axis includes the foci of the reflector. When the heater is in a vertical position the heat rays are reflected in horizontal lines and are confined within a relatively small space so that they are thrown in any desired direction.

In the accompanying drawings which illustrate the present preferred embodiment of my invention,

Figure 1 is a front elevation of the heater,

Figure 2 is a vertical section on the lme II-II of Figure 1, I

Figure 3 is a partial end e1evat1on of the heater with the end casi-ng removed,

Figure 4 is a plan view of the end casing and the spring mounting for the electrode, and

Figure 5 is an end elevation of the structure shown in Figure 4.

Referring more particularly to the drawings, the parabolic reflector 2 is mounted in a frame 3 and is pivotally connected to a pedestal 4 as indicated at 6. The pedestal is mounted on a base 5.

An electrode 7 is mounted at its ends in holding elements 8 of spring mountings which are hereinafter more fully described. Current is supplied to the electrode through conductors 9 and 10.

The reflecting chamber is formed by the parabolic reflector 2 and end plates 12 which are welded or riveted to the reflector. Each of the end plates has an opening 13 through which the holding element 8 of the electrode spring mounting extends into the reflecting chamber. As shown in Figures 2 and 3, the reflector 2 is connected to the frame 3 by flanges 14 bent around flanges 15 on the frame.

The spring mountings indicated generally by the reference numeral 16 are arranged in end compartments so that only the holding elements 8 extend into the reflecting chamber. This arrangement hides the greater part of the spring mountings from view.

The end compartments are formed by end casings 17 which are of parabolic shape and which are secured to the reflector by screws 18 which fit in slots 19 in the outer edges of the reflector. The end casing 17 has a 55 flange 2O which fits within the frame 3, and

a flange 21 which fits outside of the edge 22 of the reflector. Vent openings 25 are provided in the outer ends of the reflector in order that the end compartments will not be- 6o come overheated.

The electrode 7 is supported at each end by the spring mounting 16. As shown in Figs. 2, 4 and 5, the cup-shaped holding elements 8 which receive the ends of the elec- 65 trode 7 are mounted on a spring 26 which is secured to an insulating block 27 by a screw 28, which also serves as a binding post for the conductor 9.

The arrangement of a heating rod at the focus of a parabolic reflector insures that all of the heat rays will be reflected in parallel lines, and that they will be confined within a relatively small area as compared to other types of reflectors. The heat can be directed in the desired direction without much diffusion.

The heating rod is located so far back in the heating chamber that it ordinarily is not necessary to provide any screen for the heater. If desired, however, a screen or other type of guard may be used.

I have illustrated and described the present preferred form of my invention. It is to be understood, however, that the invention may be otherwise embodied within the scope of the following claims.

I claim:

1. An electric heater comprising a vertical frame having a rectangular opening bordered 9o by backwardly projecting edges, a horizontal parabolic reflector having upper and lower front channels gripping the upper and lower ones of said projecting edges, reflector end plates secured to the side ones of said projecting edges and to said parabolic reflector, parabolic end casings secured to said parabolic reflector back of said frame and a heating element carried by and between said end casings inthe focus of said reflector.

2. An electric heater comprising a. vertical frame having a rectan ular opening bordered by backwardly pro] ecting edges, a horizontal parabolic reflector having upper and lower front channels gripping the upper and lower ones of said projecting edges, reflector end plates secured to the side ones of said projecting edges and to said parabolic reflector, parabolic end casings secured to said parabolic reflector back of said frame and a heating element carried b and between said end casings in the focus or said reflector, said end casings having vent openings to obviate the possiblity of the over-heating of the end compartments formed by the end casings, the reflector end plates and the ends of the parabolic reflector.

3. An electric heater comprising a vertical frame haviner a rectangular opening bordered by backwardly projecting edges, a horizontal arabolic reflector having upper and lower ront channels gripping the upper and lower ones of said projecting edges, reflector end plates secured to the side ones of said proi jecting edges and to said parabolic reflector,

parabolic end casings secured to said parabolic reflector back of said frame, said end casings fully enclosing the openings between the frame and ends of the parabolic reflectors, and a heating clement carried by and between said end casings in the focus of said reflector.

4. An electric heater comprising a pedestal, a parabolic reflector pivotally mounted l on said pedestal, a vertical frame carried by the frontof said reflector, parallel reflector end plates having alined openings scecured to said parabolic reflector, parabolic end casings mounted on said parabolic reflector back of said frame, spring electrode supports carried by said casings, and a heating element supported by and between said electrode supports in the focus of the parabolic reflector and in line with the openings with said end reflectors.

5. An electric heater comprising a pedestal, a parabolic reflector mounted on said pedestal, a vertical frame carried by the front of said reflector, said frame comprising a sheet of metal having an outer ornamental channel for strengthening the frame, parallel reflector end plates having alined openings secured to said parabolic reflector, end casings mounted on said parabolic reflector back of said frame, spring electrode supports carried by said casings and a heating element supported by and between said electrode supports in the focus of the parabolic reflector and in line with the openings in said end reflectors.

In testimony whereof I have hereunto set my hand.

FRED W. WATERMAN, JR.

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