US386998A - Boiler - Google Patents

Description

W. B. MACK.

(No Model.)

BOILEB..

Patented uly 31, 1888.

WITNEEEEE:

there STATES PATENT Frrcn.

\VILLIAM B. MACK, OF BOSTON, MASSACHUSETTS.

. BOILER.

SPECIFICATION forming part of Letters Patent No. 386,998, dated July 31, 1888.

Application tiled August 20, 1887.

To all whom, it may concern:

Be it known that l, WILLIAM B. MACK, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Boilers for Heating and SteanrG enerating Apparatus,of which the following is a specification.

My invention relates to boilers or contrivanees for heating water for the purpose of leating or warming apartments of buildings,

My invention will first be fully described, and then pointed out with particularity in the claim.

Reference is to be had to the accompanying drawings, and to the letters of reference marked thereon, forming a part of this specication, the same letters designating the same parts wherever they occur.

Of the drawings, Figure l represents a front view of my improved boiler and a portion of its appurtenances. Fig. 2 represents an end or side View of the same. Fig. 3 represents a vertical sectional View of a portion of Fig. l, parts being shown as broken out. Figs. 4 and 5 represent vertical sectional views similar to Fig. 3, showing modified constructions of the invention.

In carrying out my invention I construct the return-tubes a. a of wrought-iron, preferA ably bending the same at the return-point b, and flaring or Hanging their connecting ends, as at c c.

d designates the main or connecting tubes, adapted to be built into the brick-work o'r wall of the furnace, and constructed in sections, as most clearly shown in Figs. 3, 4, and 5, each section being provided with a partition, e, which cuts off direct communication between the connecting ends of the returntubes, so as to make certain of the circulation of the water in the boiler through the returntubes and connections or mains.

The return-tubes are first constructed and their daring or iianged ends c placed in proper position in the molds for the main or connecting sections d, and the latter cast thereon. In this way an absolutely water and steam tight joint is secured between said sections and return-tubes. It is preferred to tin the ends of the tubes before they are put into the Serial No. 247,423. (No model.)

molds. Each section d, excepting the lower section, is east with a liange, f, on each end, one of which lianges has a wedge-shaped rib, g, formed thereon, which rib is adapted to enter a groove or depressed seat, l1, of approximately the same shape as said rib, formed in the adjacent flange of the next section, so that when the two sections are bolted together through the flanges fthe rib g will be drawn and wedged into the groove It, so as to form a perfectly water-tightjoint at this point. The lowerend,t, of the lower section is closed, as shown in Fig. 3, and is provided with an inlet-port, 7, as shown, for the admission of water. This inlet-port communicates with a supply-pipe, k, which is common to the several tiers of returntubes, constructed as has been described, and the several connectingmains d communicate with a common receiving-reservoir, l, whence the heated water rises through the discharge-pipe m to the registers or the like, to be returned again to the supplypipe k to be rcheated.

Vhen the apparatus is employed for generating steam, a return-pipe, c, will be eonnected with the reservoir and supply-pipe lr, as indicated in dotted lines in Fig. 2.

Instead of bending the return-tubes, as at the point b, said tubes may be made as sepa rate parts and the several pairs connected by means of a separately formed crook7 or bow7 connection or coupling, n, as shown in Fig. 4; or separate connecting-sections 0, similar to the sections comprising the connecting-sections d, may be cast on the ends of the return-tubes b, as shown in Fig. 5. In this case each section o will have one end p closed, which closed and projecting end may be so formed as to be closely seated in adepression, q, formed in the adjacent end of the next section. In this way the tiers of return-tubes may readily be built to any desired height, and any desired number of tiers may in like manner loe attached to the su pply-main k, through the tubes of all of which tiers the water will circulate constantly while there is heat in the furnace.

It is obvious that changes may be made in the form and arrangement of parts constituting my invention without departing from the nature or spirit thereof.

I claimd- The combinatiomwithapair of return-tubes, of a, connecting-section, d, to which said'tubes are attached, said connecting-section being 5 provided with a partition, e, at acentral point, and nn one end with a rib, g, and on the other end with a. groove or depressed seat, 7L, as set forth.

In testimony Whereof have signed my name to this specioation, in the presence o'f two :o subscribingwitnesses, this 9th day of August, A. D. 1887.

WILLIAM B. MACK.

Witnesses:

ARTHUR W. CRossLEY, O. F. BROWN.

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