US1743088A - Air-heating appliance - Google Patents

Description

Jan. 7, 1930.

1 A DERBY' AIR HEATING APPLIANCE Filed Jari. 2. 1929 L Patented Jan. 7, 1930 PATENT ola-FICE LLOYD A. DERBY, 0F ADRIAN, MICHIGAN AIB-HEATING APPLIANCE Application filed January 2, 1929. Serial No. 329,906.

This invention relates to air heating appliances, and more particularly to an apparatus of this character providing a convenient source of heated air under pressure which is portable and accordingly may be employed to great advantage in garages, in thawing frozen pipes or melting grease in transmissions, diHerentials, joints or the like to render the same fluid and enable its ready removal.

An important object of the invention is to produce a device of this character which may be readily and cheaply manufactured, which will be durable and efficient in service and a general improvement in the art.

These and other objects I attain by the con'- struction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is an end elevation of a heater constructed in accordance with my inven-y tion;

Figure 2 is asection on the line 2-2 of Figure 1;

Figure 3 isa fragmentary section at right an les -to theA view of Figure 2.

eferring now more particularly to the drawings, the heater comprises a @cylindrical casing 10 having its ends closed by heads 11 and 12. The casing 10 comprises inner and outer metallic wall elements 13 and 14 having disposed therebetween an insulating lining, such as asbestos 15. Each head 11 and 12 is provided at one side with an ear 16 terminating in spaced relation to the'wall of the cylinder and each head has va socket 17 receivin the ends of the wall of the cylinder.

Wit 'n each socket 17 is disposed an asbestos pad 18, lthe pad of the head 11 bein held in position by engagement of the en of'the Casin wall therewithand the pad of the head 12 eing secured in position thereonv ,by a .socket 19 seated u on'the inner face thereof and secured to t e head by contact bolts 20 which are extended through and hushed from the head. The vhead 12 has a flange 21 in surroundin relation `to these contact' bolts and u on .t l e free edge of this flange is seatedl ac osure plate 22 apertured for the passage of a lead cord 23. The heads are connected to one another to clamp upon the ends of the casing by means of stay bolts 24, one of which passes through the free ends of the ears 16 and intermediate these ears has mounted thereon a handle 27 by means of which the casing may be manipulated.

The head 11 has an .outlet o ening 28 in which is mounted anozzle 29 wli 12 has an inlet opening 30 with which is engaged a control valve 31 for controlling the supply to the heating chamber 32 formed 'by the combination of the casing and heads.

The outlet 28 and inlet 30 are arranged at opposite sides oftheir respective heads, so that air passing from the inlet to the outlet must pass over a heating element 33 disposed within the chamber and mounted with in the socket. This heating element may be any of the electric resistance units now commonly sold upon the market.

.In the use of the device, the air assing through the chamber is considerably cated, and this heatin blast directed upon congealed grease bot softens the same and tends to separate it from the surface upon which it is a plied. This renders the device particular y applicable in cleaning exposed surfaces prior to regreasing or repairing the same. In drainin a transmission or differential, the lnozz e may be inserted in the filling opening thereof after removing the drain plug and the incoming heated air will ile the head vso serve to liquefy the grease, tending to permit it to flow while the 'et of airv will assist in forcing the softened lubricant from the case.

Since the construction hereinbefore set forth is capable ofa certain range of change and modification without materially departing from the spirit of the invention, I do not limit myself to such specific structure except as hereinafter claimed.

I claim v v 1. -In combination, a casing having a cylindrical wall. and heads abutting opposite ends 0f said Wall to close the same, lsaid heads be-r ing each provided with outstanding ears, stay bolts connecting the heads, one of said stay bolts being passed through the ears, a handle s surrounding said stay bolt between the ears, a heating element arranged within the casing, a nozzle communicating with one end of the casing, and means for introducing air under pressure to the casing to the opposite end thereof.

2. In combination, a casing having a cylindrical wall .and heads abutting opposite ends of said wall to close the same, said heads being each provided With outstanding ears, stay bolts connecting the heads, one of said stay bolts being passed through the ears, a handle surrounding said stay bolt between the ears, a heating element arranged within the casing, a nozzle communicating with one end of the casing, means for introducingair under pressure to the casing to the opposite end thereof, said heads having sockets receiving the ends oi thc cylindrical wall, and heat insulating pads disposed within said sockets and retained in position therein by said cylindrical Wall. 3. In combination, a casing having a cylindrical wall and heads abutting opposite ends ot' said wall to close the same, said heads being each provided with outstanding ears, stay bolts connecting the heads, one of said stay bolts being passed through the ears, a handle surrounding said stay bolt between the ears, a heating element arranged Within the casthe casing, and means for introducing air ing, a nozzle communicating With one end of under pressure to the casing to the opposite end thereof, said cylindrical Wall comprising inner and outer metallic shells and an interposed heat insulation.

4. In combination, a casing having a cylindrical wall and heads abutting opposite ends of said Wall to close the same, said heads being` each provided with outstanding ears, stay bolts connecting the heads, one oi' said stay bolts being passed through the ears, a handle surrounding said stay bolt between the ears, a heating element arranged within the casing, a nozzle communicating with one end of the casing, means or introducing air under pressure to the casing to the opposite end thereof, said heads having sockets receiving the ends of the cylindrical wall, and heat insulating pads disposed Within said sockets and retained in position therein by said cylindrical Wall, said cylindrical wall comprising inner and outer metallic shells and an interposed heat insulation.

5. An air heating apparatus comprising a portable casing having a head provided with an inlet and a head provided with an outlet, an electrical heating element within the casing, a support for said element, bolts securing the support to one of said heads, the bolts passing through the head and connected to the heating element, a iiange carried by said head in surrounding relation to the outer ends of the bolts, and an apertured closure plate secured to the flange.

Intestimony whereof I hereunto aiix my signature.

LLOYD A. DERBY.

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