US374094A

US374094A - Weight d

Info

Publication number: US374094A
Authority: US
Publication date: 1887-11-29
Anticipated expiration: 1904-11-29

Description

(No Model.)

' W. D. SMITH.

AIYR HEATING APPARATUS. No. 374,094. Y Pajtented Nov. 29, 1887.

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UNITED STATES PATENT OFFICE.

WRIGHT D. SMITH, OF DETROIT, MICHIGAN, ASSIGNOR TO THE HUYETT 85 SMITHv MANUFACTURING COMPANY, OF SAME PLACE.

AIR-HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent N o. 374,094, dated November 29, 1887. Application tiled October 2S, 1886. Serial No. 217,427. `(No model.)

struction and combination of the parts with.

I5 relation to each other, as more fully hereinafter described and claimed.

In the accompanying drawings, which form a part of this specitication, Figure l represents my invention in perspective, with parts of the wall of the air-heating chamber broken away to show the interior arrangement. Fig. 2 is a central vertical section ot' the fancase and its flaring mouth.

A represents a box, preferably made of sheet metal and rectangular in form, with an open discharge end communicating with the drykiln, which latter is not shown. The header-pipe B passes through the ends of this box, near one of its upper corners, and upon its projecting ends, one being at either end of the box, a suitable cut-ott' valve, C C', is"

placed, and one of the projecting ends is connected with the exhaust of the engine that may be employed for driving the apparatus,`

while the opposite end is connected with -the live steam ofthe boiler, so that the exhaust or live steam may be used,as desired, by opening the proper valve for its admission and closingthe opposite one. io D is a similar header-pipe extending along one of the lower corners of such box A, and projecting a-t both ends for the purposes of exhaust and live steam condensation and outlet, and these projecting ends are provided With other suitable valves. Preferably this header-pipe D is diagonally opposite the header-pipe at the top of the box, and the two header-pipes are connected together by a series of steam coil-pipes, E, each coil being 5o independent from the others and connected at top and bottom with the header-pipes B and D, care being taken that the area of both these header-pipes is not greater than the ,area of the pipes forming the coils in crosstion, (driven from any suitable source of 6o power,) drives the air centrifugally into the box A, through the flaring mouth G, which affords communication between the fan and the interior ofthe box A, to which latter such flaring mouth is secured around an opening large enough to admit of the centrifugal action of the air in being forced into the box, so that in the passage of such air through such box it is brought into contact with all, or nearly all, the radiatingsurfaces of the pipes of the steam- 7o coils and headers, and to this construction I attach importance.

I find by experience that with this construction I am able to heat a larger volume of air and to carry the same into the dry kiln with a great 4saving of labor to the fan, and that the air discharged into such dry-kiln is of a higher' temperature when thus forced through the heating-chamber than when drawn through by a suction-fan located at the opposite end 8o of the heating-chamber to that where I locate iny Ventilating-fan, in which latter construction the fan agitates and cools the air.

For many commercial purposes hot air is needed, and this device can be regarded as a 8 5 hot-blast apparatus adapted to such purposes.

Vtfhat I claim as my invention is- The combination, in a hot-blast furnace, of the box A, inclosing steam-coils, with a diskfan with its axis parallel with the length of 9o said box, and a flaring communication between the fan case and box, whereby the centrifugal force of the fan will drive the air into all parts of the box, substantially as and for the purpose specified.

W, D. sMrrH.