US122606A - Improvement in steam-boilers, heaters, and condenser tube-joints - Google Patents

Description

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JOSEPH HARRISON, JR., OF PHILADELPHIA, PENNSYLVANIA.

A IMPROVEMENT IN STEAM-BOILERS. HEATERS, AND CONDENSER TUBE-JOINTS.

VSpecification forming part of Letters Patent No. 122,606, dated January 9, 1872.

Specification describing an Improvement in Steam-Generators, Heaters, and Condensers, invented by JOSEPH HARRISON, Jr., of Philadelphia, Pennsylvania.

My invention relates to steam-generators or boilers of the class generally known as sectional, distinguished from those in which the several parts are permanently united together, sectional boilers being built of pieces, one or more of which can be readily removed and replaced and my invention consists of lap-welded tubes connected together at oneor more points between their opposite ends by flattening each tube to a perforated ferrule or thimble, interposin grings between the iattenedportions of the tubes, and connecting the whole trigether by bolts, all as `fully described herea ter.

Figure lis a side view, partly in section, of portions of two tubes ofa steamgenerator, heatl er, or condenser; Fig. 2, a sectional plan on the line l 2, Fig. l; Fig. 3, a vertical section on the line 3 4, Fig. l; Fig. 4, a vertical section on the line 5 6, Fig. l, Fig. 5, a portion of Fig. 3 detached 5 Fig. 6 a sectional view, illustrating a moditication of my invention.

A and A are portions of two ordinary lapwelded tubes, which are connected together at the ends, as well as at any desired intermediate points, in the following manner: In connecting the tubes together at any point excepting at the ends I adopt the plan best observed in Figs. l, 3, and 5, whereB represents a metal ferrule or thimble shorter than the diameter of the tubes, and having at each end an annular rib, a., and in the middle two holes, b b, directly opposite to each other. In each tube Al I bore two holes opposite to each other, these holes being arranged to receive the annu-` lar ribs a a of the thimble, as shown in Figs. l and 3, and the tube being flattened until its opposite iiat sides bear on the shoulders x m made on the thimble by reducing the same in diameter so as to form the said annular ribs. A ring, D, is interposed between the ilattened portions of two adjoining tubes in such position as to be concentric with the thimble, as shown in Figs. l and 3, the thickness of the ring depending upon the desired distance apart ofthe tubes, the cylindrical portions of the latter being, inthe present instance, in contact with each other. v It will be observed that an annular lip is formed on each edge of the ring, this lip being of such a diameter as to fit snugly in the thimble, while the shoulder formed ou the ring by the lip bears on the flattened portion ofthe tube and binds the same to the shoulder of the thimble. A like annular lip is formed on the cap pieces E E, which close the outer openings of the outer tubes of a series, and a bolt, F, passing through both cap pieces, tubes, thi mble, and rings, serves to bind the whole together, while a free passage is ailorded through the thimble for the water or steam to pass longitudinally from end to end of the tubes, or from one tube to another, throughout the series. Into the end of each tube I introduce a hollow cast-iron plug, which is flat on opposite sides; and to thisplug I adapt the tube, through the iiattened portions of which are bored holes coinciding with holes y in the plug. A ring, D', and cap -pieces E E are fitted to the lattened ends ofthe tubes, and the whole bound together by means of a bolt in the manner adoptedof connecting the tubes together at any points between their ends. It will be seen that the hollow plugs and their openings permit the water or steam to pass freely from one tube to the other at the ends of the saine. The hollow plug may be secured to-the end of the tube by rivets p and g, as shown in Figs. l and 2; and screws m m may be introduced into the closed ends of the hollow plug, so that on their withdrawal holes may be presented for the insertion of a suitable instrument wherewith to cleanse the interior of the tubes.

In Fig. 6 I have illustrated a modification of the tubular coupling for connecting the flattened portions of the tubes together. In this case the thilnble D is beveled inward at the opposite edges and the edges of the ring B beveled outward, and the metal at the edges of the holes in the attened portions ofthe tube has a corresponding bevel, and is confined in the manner clearly illustrated in the drawing.

rEhe greatest objection to steam-generators composed of a series of wrought-iron detachable tubes of sectional boilers is the liability of the water to be forced from those tubes which are nearest to the fire and which are consequently exposed to the rapid deteriorating effeet ofthe heat. This absence of water is attributable to the limited number of channels for circulation, the tubes in boilers of the sectional class being, for the most part, connected together at the opposite ends only.

By the adoption of my improvement the tubes may be connected together at any nuniber of points between their opposite ends, and thus numerous channels maybe thereby afforded for the free Circulation of the Water and steam.

Another advantage of my mode of connecting the bodies of lap-Welded tubes together is the facility which it a'ords of making steamgenerators or heaters of' a variety of forms. For instance, Walls of tubing may inclose a tireplaee, which may be roofed with tubes, the whole being connected together at so many points that the circulation of Water and steam must be free throughout; or a generator may be made of a series of longitudinal tubes alternating with transverse tubes, the structure being built of any desired dimensions, and forming a net-work of tubing connected together at so many points that a free circulatian of Water and steam through the entire system of tubes is insured.

Another advantage of my invention is thatby flattening the tubes Where they are secured together by tubular connections the bodies of the tubes can, when desired, be brought into contact with each other. For instance, they may be arranged to form the Walls of a replace, the openings where the joints occur be ing iilled with fine clay.

I claim as my invention- Lap-welded tubes connected together et one or more points between their opposite ends by flattening each tube to a perforated ferrule or thimble, interposing rings between the flat tened portions of the tubes, and conneetin g the Whole together by bolts, all substantially as described.

In testimony whereof I have signed my name to this speciiieation in the presence of two subscribing Witnesses.

JOSEPH HARRISON, J R.

Witnesses:

WM. A. STEEL, HARRY SMITH. (148)

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