US1384067A - Weatherproof electric heater - Google Patents

Description

um I

L. P. HYNES.

WEATHERPROOF ELECTRIC HEATER.

APPLICAT!0N FILED MAY 8. 1920.

Patented July 12,1921.

f f 25 INVENITOI? R form of my invention, reference may be had UNITED STATES PATENT oFricE,

LEE 1. HYNES, ALBANYQNEW YORK, ASSIg-NOR TO CONSOLIDATED CAR-HEATING COMPANY, OF ALBANY, NEW YORK, A. CORPORATION OF WEST VIRGINIA.

To all whom it may concern:

Be it known that I, LEE P. HYNES, a citizen of the United States, residing at Albany, in the county of Albany and State of New 5 York, have invented certain new and useful Improvements in Weatherproof Electric Heaters, the following being a full, .clear, and exact disclosure of the one form of my invention, which I at present deem preferable.

'ment on thefelectric heater shown in the I patent of 'Boardm'an No. 1,294,607, February 18th,1919. I *or'a detailed description of the present .tothe following specification 'and to the accompanying drawings thereof, Wherein- Y Figure 1 is'a side elevation of my heater,

Fig. 2 is a longitudinal section,

Fig. 3 is a transverse section-on line B-B of Figs. '1 and 2 Fig. 4 is a bracket for supporting one end. of the .porce lain core. i In the construction of electric heaters to be used under water or in snow orlother exposed places, like the heater of the Board man patent, it has .been. found difiicult to maintain the electrical connection with the heating coil, due'to thefact that insulation which is moisture-proof will not stand heat, while heat-resisting insulation is. not moisture-proof; My improvement for overcoming this difliculty resides primarily in adding to such heater a cooling compartment or vestibule which is out 01f from the Y coil-containing part wherein the tempera- 40 ture rises to 500 or 600 degrees and is also specially cooled by radiation. From this vestibule I extend through to the heater coils in the coil-chamber wires which are bare, or insulated by heat-proof material like asbestos and I extend outward fromv the vestibule into the atmosphere or the conduit 7 wires which are covered with moisture-proof insulation such as rubber. By my arrangement the temperature in the vestlbule is so chamber that the "irubber covered wires therein can be maintained withoutdeterioration while the bare or asbestos covered wires My inventionis designed as an improveforming a 7 part detail at illustrating thereduced below the extreme heat inthe coil- Specification of Letters Patent. Patented July 12, 1921 Application fi led m s, 1929. Serial No. 379,811,

bule terminal posts at which the connection can be made between "the incoming moistureproof wires on the one hand and the heatproof wires on the other hand, the latter being a permanent part of the apparatus. F urther features of novel construction will be referred'to hereinafter.

Turning to the drawing, 8 represents a porcelain core or support on which are spi-' rally wound 1n grooves on the outer surface the heating" coil 19. Through the center of the core 8 passes a metal rod 4. On the left end of the-core is a porcelain disk 9 and outside of that is a U-shaped bracket 11 which is built into the heater and insulated from the central rod 4 by a composition disk 12; which secures the bracket to the disk 9, being held in place by a nut on rod 4. 'On

-the right end of the porcelain core is a square plate 10 of asbestos held against the core by a nut 27. This plate 10 serves to center the coreavith respect to the external casing. A metal tube 3 forms the-casing which", at the left, abuts against a substantial head-plate 5 with an interposed packing gasket 7. At the right end isv a similar heavy plate 5-'which is enlarged and hollowed outin a bulb shape to form the low. temperature vestibule.

passed' through the two heads'and serve .to. draw them together against the opposite ends of ,the tubular casing 3, the packing gaskets 7 of sheet copper or asbestos and graphite composition being interposed at each end. To the head 5,at the left is secured the bracket 11 by means of a screw 20.

The vestibule is shut off from the heating chamber by a wall 15 of'asbestos layers External bolts 6'are through which pass two porcelain bushingss- 30, andv through these bushings two bare or asbestos-covered wires C and D extend. In theheating-chamber Wire C is secured to the right end of the central rod 4 by v means of nut 28, while wire -D connects with the right terminal of the heating coil. At the opposite end the centralrod 4; con-' nects with the other terminal of the coil. Within the vestibule the heat-proof wires C and D connect respectively with two'bin'ding posts 24 on an insulating plate 14 which is secured to the inside wall of the, vestibule. Since the cubic capacity of the vestibule is small and its thick ,walls exposed on the out- Side to the air, water, snow orv other cooling medium, the te pe a ure therein remains ing but are not capable of withstanding the much lower'than that of the coil-chamber where-heat is being "constantly generated. The vestibule is also shut off from the coil compartment by wall 15. That enables me to bring into'the vestibule rubber-covered wires such as are necessary for waterproofhigh heat of the coil-chamber. In the rear of the vestibule is an opening into which a conduit may be screwed tightly containing- On the rubber-covered wires {l0 and All. the top of the vestibule is another opening .covered by a flanged nut .18 with a watertight gasket under the flange. By this means the waterproof wires may be passed through the conduit into the vestibule and then screwed to the binding posts 24L bya screw driver inserted through the top holeaforesaid which-is perpendicular to the line of the entering conduit. The heat-proof Wires C and D are sufiiciently removed from.

any metal so that even if they are bare their insulation is adequately maintained by the wall 15 through which they pass and by which they are supported and also by the insulating plate 14 carrying the binding posts to which they are connected. They are also stiif and substantial enough to preserve their shape so that there is no danger'of' their saggin down to touch the metal at any point.

the moisture-proof leading-in wires.

lVhat I claim as new and desire to secure by Letters Patent'is: V

1. A weatherproof electric heater comprising a casing forming a coil chamber, a

supplementary casing forming a low-tem-f perature chamber suitable for moistureproof vwires, a heat insulating partition betueen. the two chambers and a' heat-proof conductor :leading from the coil in the-coilchamber through .said partition .to a terminal in the low-temperature chamber.

2. A weatherproof electric heater comprising a casing'forming a coll-chamber, ,a

supplementary ca sing forming a low-temperature chamber suitable. for moisture- 'proof wiresfla heat insulating partition between the two chambers haying a sealed joint with-the casing, and a heat-proof 'con- 'prising a casing'forming a coil-chamber, a

ductor' leading from the coil in the coilchamber through said partition to aterminal in the low-temperature chamber.

3. A- weatherpr'oof electric heater comsupplementary casing forming a low-temperatnre casing suitablefor moisture-proof wires, a heat-insulating partition between .the two chambers separated from the coil and its'core andv a heat-proof conductor 0 0 they are independent of any insulating coating such as is requlred for leading through said partition from the coil in the coil-chamber to a terminal in the lowtemperature chamber.

4:. A Weatherproof electric heater comprising a casing forming a coil-chamber, a supplementary casing forming a low-temperaturecasing suitable for moisture-proof wires, a heat-insulating partition between said chambers, a detached terminal block in said low-temperature chamber, and a heat-proof conductor extending through said partition to connect the coil in the coilchamber with a terminal on said block.

5. A weatherproof electric heater comprising a casing forming a coil-chamber, a supplementary casing forming a low-temperature casing suitable for moisture-proof wires and having an end-opening for the prisingua tubular metal casing forming a coll-chamber, separate end-plates between which the said casingis clamped, one of said end-plates"being extended to form a low-temperature casing suitable for moisture-proof Wires and a heat-insulating partition between the said chambers. 8. A weatherproof electric heater com- '/prising a casing forming a coil-chamber, a coil therein, a core for the coil provided with end-plates-separated fromithe ends of the chamber and centered therein, a heatinsulating partition forming one end of said chamber, a supplementary casing forming a low-temperature chamber suitable for moisits ture-proof wires on the outer side of said partition, and a heat-proof conductor ex.- tending through the, partition to connect the coil with a terminal in said low-temperature 'chamber.-

9. A weatherproof electric heater comprising a thin metal tube forming a coilchamber, a separate. thick-walled' casing forming a low-temperature chamber,aheatinsulatingpartition between the two chambers and means for clamping the said tube between the thick -walled casing and an opposite end-plate.

Signed atAlbany, county of Albany, State of New York, this 1st day of May, 1920.

- LEE P. HYNES.

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