US446785A - van zile - Google Patents

Description

(No Model.)

J.1V1ACCOR1V1ACK 8a H. L. VAN ZILE. STEAM BOILER. 110.446,785. Patented Feb. 17,1891.

UNITED 'STATES PATENT OFFICE.

JOHN MAO OORMAOK HARRY L. VAN ZILE, OF ALBANY, UEV YORK.

STEAM-BOILER.

SEECIFICATION forming part of Letters Patent No. 446,785, dated February 17, 1891.

Application filed March 6, 1890. Serial No. 342,852. (No model.)

To all whom it may concern:

Be it known that we, JOHN MAC CORMAOK and HARRY L. VAN ZILE, both of the city of Albany, county of Albany, and State of New York, have jointly invented new and useful Improvements in Steam-Boilers, of which the following is a specification.

Ourinvention relates to improvements upon steam-boilers, and more particularly to that class of them which are employed for steamheating uses; and the object and purpose of our invention is by an improved construction and arrangement of the operative parts to insure a rapid heating and prompt. circulation of the water and an increased steam-pro-A ducing capacity.

Our invention consists` (as will be more fully detailed hereinafter in connection with its illustration, and as set forth in the claim) in the combination, with a boiler provided with vertically-arranged hot-air tubes or fines and having a transverse flue above and below said air-tubes connecting therewith, of a tire-chamber provided with a grate, said firechamber connecting at its upper end with the transverse flue over the boiler, and a helical coil'arrangedin said Hreehamber, with the lower end of said coil-pipe descending to connect with the boiler near its bottom and the upper end of said coil connecting with said boiler near its top, but below its water line.

Accompanying` this specification to form a part of it there isa sheet or drawing illustrating in a single figure a boiler containing our invention. This illustration shows in a central vertical section the boiler and firechamber, as well as the flue at the top of the fire-chamber connecting with the flue over the boiler, and the flue at the bottom of the boiler with the coil illustrated as arranged within the fire-chamber and shown in side elevation.

The several parts of the boiler thus illustrated are designated byletter reference, and the function of the parts is described as follows:

The letter B designates the boiler, S its shell, and T the vertically-arranged iiucs or tubes therein for the downward passage of the hot air; F,the bottoni flue, provided with an exit E, and F2 the top iiue.

The letter C designates the re-chamber, and G its grate; A, its ash-pit; D,its damper`m door, and D2 its fuel-supplydoor; XV, the side walls of the tire-chamber, made to inclose a combustion-chamber C2.

The letter Fsdesignates a iiue leading from the top of the lire-chamber to connect with the flue F2 at the top of the boiler, said flue being inclosed by the roof-plate P', connecting with the roof plate P2 of the iiue F2.

The letter K designates a helical coil of pipe, which at its lower end descends to connect with the boiler B at k2, and which coil at its upper end rises slightly to connect with the boiler B at 7c3 below the waterzline L in the latter, said coil being arranged within the fire-chamber C.

The letter p2 designates a steam-pipe connecting with the steam-gage pipe p3 at one end and at its other end connecting with the val ve V, which latter is provided with a pressure-lever Z, that is weighted at wg, is pivoted at p4, and at its long arm connected with the upper end of the chain d, with the lower end of the latter connecting with the damper-door` D', so as to operate the latter by the measure of steam-pressure in the usual manner.

The letter Gr2 designates the steam-gage arranged on the steam-pipe p3, which latter connects with the boiler at p5, and the let-ter I designates the water-gage arranged on the pipe p3, to show the height of water in the boiler.

The letter J designates the water-feed, and R the return-pipe.

The operation of the boiler thus constructed and arranged is as follows: The water in the boiler B is heated bythe descending currents of hot air passing through the tubes T, while a circulation and additional heating is produced by the action of the coil and its connec tion with the boiler, which circulation makes the operation of the boiler more positive, which is of great advantage in boilers of this class.

Ve are aware thata water-heating aud water-circulating coil has been combined with a irechamber and connected with a water-reservoir surrounded by a descending iiue that encircled a part of the reservoir, with the npper end of the latter projected through the flue which surrounds it, and we are also aware that a boiler made with vertically-arranged dues passing through the boiler is an old construction. Our invention dili'ers from these older construct-ions in the fact that the fire chamber ot' our apparatus and that in which the waterheating and eirculatiingcoil is placed connects with the Vertical ilucs of a boiler by means ot' a horizontal tlue passing; from the top of the tire-chamberover the boiler-top. so that the heat coming from the tire-chamber may circulate over the top of the boiler and down through the boiler-tubes in contradistinction as to a flue passing around a part of a reservoir projected downwardly into a tine, or up through the tubes of the boiler with the fire beneath, in neither of which older devices can the coil cooperate with the same means for heating the boiler as in the arrangement which we illustrate and describe.

Having thus described ourinvention, what we claim, and desire to secure by Letters Patent, is-

The combination, with a boiler havingT ver tical descending Ilttes,abotto1n luc provided with an exit and connectingwith the lower ends of said vertical lilies, and atop tine conneetiir;71 with the upper ends thereof, of a lirechamber provided with a top ilue connecting with the topilueot' the boiler, a helically-coiled pipe arranged within said lire-chamber, with the lower end of said coil eonncetin,r with the boiler near its bottom, and the upper end of said coil connecting with the top ot' said boiler below its water-line, substantially in the manner as and for the purposes set forth.

Signed at 'lro i', New York, this 26th dayof February, 1890, and in the presence of the two witnesses whose naines are hereto written.

JOHN MAC CORMACK. HARRY L. VAN Zllil).

"Witnesses:

('HARLEs S. BmN'rNALi., W. E. HAGAN.

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