US1514287A - Electric heater - Google Patents

Description

Nov. -4 1924.

1,514,287 L P. HYNES ELECTRIC HEATER Filed Aug. 19, 1922,

.I I I 'L': 11117: I l if@ Z I Patented Nov. 4, 1924.

UNITED STATES PATENT OFFICE.

LEE P. HYNES, OF ALBANY, NEW' YORK, ASSIGNOR TO CONSOLIDATED CAR-HEATING COMPANY, OF ALBANY, NEIV YORK, A CORPORATION OF WEST VIRGINIA.

ELECTRIC HEATER.

Application led August 19, 1922,

To all whom t may concern:

Be it known that I, LEE P. I-IYNEs, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Electric Heaters, the following being a full, clear, and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may oe had to the following specification and to the accompanying drawings forming a part thereof, wherein-e` F ig. l is a perspective partly in section showing' the general character of my construction,

Fig. 2 illustrates the mode of mounting the heater,

Fig. 3 is a plan of my device,

Fig. 4 a side view and Fig. 5 an end view thereof.

My invention includes the inode of supporting a removable-coil heater and also the mode of mounting a heater under the seat of a railway car. The heater to which my invention is applied is of a kind invented by me, but not claimed herein, which contains a separable coil of wire threaded loosely into a tube of refractory insulation that is encased in a sheet metal tube. The coil terminals are permanently secured to the respective ends of the coil and project therefrom through an insulating plug in the end of the metal tube. A heater of this kind I now purpose to support by means of brackets secured to the ends of the respective plugs aforesaid by means of an insulating` bushing inserted in a recess in the outer end of the plug. The terminal contact rod passes axially through the plug and bushing and the lead wire is connected to the end of said rod by nuts and washers.

A heater, such as the one just described, is secured to the under side of a plate of polished aluminum which acts as a reflector of heat and a protector of the car seat above it.` The reflector plate, together with two heaters mounted as aforesaid on its under side, is placed horizontally between the two angle bars of the seat frame, above which lies the removable seat cushion. Below the said angle bars a guard is supported thereby consisting of four arched straps with ar pair Serial No. 583,042.

of similarly arched plates secured thereto longitudinally and having their edges spaced apart Yfrom each other and from the yangle bars above to provide for the flow of air over the heaters.

Referring to the drawings, particularly F ig. 2, A represents a sheet metal tube compressed toform wings or ribs on diametrically opposite sidesA thereof. Inside of and closely iitting the tube A, is an insulating tube B, preferably of porcelain and in sections. A separable heater-coil S is threaded through tube B and held extended therein under tension by means of connector-1ods l) to which the ends of coil S are permanently secured. A perforated insulating plug C is screwed into the screw-threaded end of metal tube A with a recess in its outer end into which a headed bushing E of insulation is driven. Between the outer face of plug C and the inner face of the head of bushing E is the angular bracket F which is of sheet metal, the vertical leg of the bracket being lerforated to receive the shank of bushing E, while the horizontal leg is screwed to the under side of a support, such as the plate G. By this simple and cheap device applied to each end the heater is securely mounted. Moreover the tube or shell A is effectively insulated, not 'only from the heater-coil S but also from the bracket F, and no further casing is required. This heater is to be contrasted with the standard electric car-heater now in almost universal use, wherein a bare coil is wound on a grooved porcelain roller which is considerably more in diameter than the spread of the flanges on the aforesaid tube or shell A. The exposed coil necessitates a large external casing for safety from electric contact, whereas, my above-described heater and mounting is electrically harmless without any casing at all. In some instances, however, a guard of some sort is desirable for mechanical protection of the heater itself and to give direction to the air circulation over it. One such instance is an electric heater under the cross seat of a car for which I have devised the arrangement shown in my drawings. In F ig. l P P are the two angle rails of an ordinary seat frame extending parallel with the seat and carrying a removable seat cushion above them in a well known manner. Between these two rails I extend a fiat sheet G of aluminum polished on its under side whichmbetween said braclet and said terminal conconstitu't'es an effective heat-screen for the` seat cushion and also reflects the heat radiation intor the air currents. Thisvv plate G fits between the horizontal portions of the angles P'P and may be readily' removed when the seat cushion is lifted independently of the angles by removing the screws 2, 2. On the under side of sheet G l mount two of the aforesaid heaters by the described angle- Vsupports F, F. Under these heaters is a guard formed by four arched straps K, l, etc., whicli,a1s appear in Figs. 3 and l, have slotted ends which are bolted to the under sides of the aforesaid angle-rails l, l), of the 'seat frame.y C, G are two longitudinal strips or plates fitted on the outside of the four strips or plates l, K, K, K, with stiffening flan-ges on their parallel edges. A slot or space .is left between the adjacent lower edges ofthe plates 0, O, vthrough which air may Ienter from below as indicated by an arrow in F ig. l, while the upper edges 'of the plates are spaced. away from the 'adjacentangles P, P to form horizontal exit ways for the air, indicated by thehorizontal arrow-s in Fig. l, that rises up from below through the slot just mentioned. lt will be observed that the plate Gr aforesaid is screwed to the arched straps K, K, etc., and that one end of plate G, Viz, the part thereofv marked G1 in Fig. S, is cut ed and secured separately to the straps K, l, etc. Moreeyer, the endsof plates t), (l, are connected by a plate @l in which there is a hole formed for the admission of the conduit containing the two wires. rlherefore, so

' lon-g as the heater is in place it is only necessary to lift up the aforesaid enr section G1 of plate G to give access to the lead wires and permit their connection to the aforesaid terminal rods D', D r-espec i'v'ely. Since at the rear 'end of theheater the rods D, D' are connected by a cross-'piecer D1, the circuit through the two coils in series is established by this connection 'of the two lead wires to tlre respective rods D, D.

What l I'ela/im as new `and desire to secur by Letters Paten-t is i l. An lelectric heater comprising a metallic shell, av refractory insulatng tube within said shell, a separablecoil within said tube, an insulating plug in the end of the metallic sli-ell, and la supporting bracket mounted on said plug.

2. An electric heater comprising metallic shell, fa refractory insulating tube within saidvsihe'lfl, a separable coil within said tube, an insulating plug in the end of the shell, a terminal connector for the coil extending through said plug, 'a supporting bracket outside of saidzplug, and an insulating bushing iector.

:in electric heater comprising a metallic shell, a refractory insulating tube within said shell, a separable coil within said tube, a terminal connector for said coil extending outside of said shell, a supporting bracket at the end of the shell and insulation between said bracket and the shell and between said bracket and-the terminal connector.

l. A metallic plate adapted to lie between the longitudinal frame-bars of a car seat,` an electric heater mounted on the under side of said plate, and a metallic guard beneath said heater mounted on said frame-bars independently of said plate.

5. A metallic plate' adapted to lie between the longitudinal frame-bars of a car seat,Y an electric heater mounted on the under side of said plate and removable therewith, and a metallic guard beneath said heater mounted on f the said frame-bars and carrying the said plate.

6. A. metallic plate adapted to lie between the longitudinal frame-bars of a carseat, an electric heater beneath said plate, transverse straps between said frame-bars below the heater, and a longitudinal plate mounted on said straps.

7. A metallic plate adapted to lie between the longitudinal frame-bars of a car sea-t and having a separately-removable end section, an electric heater below said plate, a metallic guard below said heater and mounted on said frame-bars, and leading-in conductors connecting with the heater terminals at a point below the said separately-removable section of the plate.

8. A metallic plate adapted to lie between the longitudinal frame-bars of a car seat, an electric heater mounted onthc under side of said plate, transverse straps extending between said frame-bars andV supporting said plate, and spaced-apart plates on said straps below the heater and parallel to said framebars.

9, if-'iinetallic plate adapted to the l'ongitudinal frame-bars of a car seat, two parallel electric-heater sections mounted on the under side of said plate, a separately removable section of said plate at one end or' the heater sections, a connection between the two heater coils at one end, and connections at the opposite end and below said remov able plate-section between the leading-in wires and the respective terminals of the heater coils.

Signed at Albany, county of Albany, and State of New York, this 16th day of August, 1922.

L. r. urines.

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