US133723A - Improvement in steam-generators - Google Patents

Description

UNITED STATES PATENT ()rrron.

DAVID RENSHAW, OF SYRACUSE, NEW YORK.

' IMPROVEMENT m STEAM-GENERATORS.

To all whom it may concern:

Be it known that I, DAVID RENSHAW, of Syracuse, in the county of Onondaga and State of New York, have invented certain Improvements in Steam-Generators, of which'the following is a specification:

' Nature and Object of the Invention.

This invention relates to the construction of the parts exposed to the direct action of the heat in generating steam and their combination with other parts, and their arrangements with relation thereto; and is designed to fur nish a more compact steam-generator, and one in many respects more serviceable than any heretofore in use.

vDescription 0f the Accompanying Drawing.

' V Figure l is a front elevation of the steamgenerating apparatus and the section of the reverberatory t'urnace with which these parts are to be combined, and inside of which they are to be arranged. Fig. 2 is a longitudinal view in similar elevation andsection. Fig. 3

is a detail view, showing in horizontal section one of the modesin which I propose to construct the fiat cast-metal sections which constitute the principal, or at least large, part of the steam-generating portion of my improved generator. Fig. lis a similar section, showing another mode of construction.

General Description.

- the construction of the boiler which is hereinafter described, and especially to furnish a central support for the boiler. D is a central cylinder extending the whole length of the furnace and connected at or near its ends to the cylinders E E by the cross-cylinders F F. The central cylinder D is provided with upwardly-projecting connections a a to receive the central vertical pipes G G, which latter connect with the connections H H, which form communications between the pipes G G and the steam-drum L. Said pipes G G also have Specification forming part of Letters Patent No. 133,723, dated December 10,1872.

lateral projecting connections I) b, which connect with the flat sections J J, which latter also connect at the bottom with the side cylinders E E. These flat sections J J are cast in a single piece together with the stay-bolts c c, which are east through holes in the cores on which these sections are cast. In Fig. 4 these stay-bolts c c are represented as being cast hollow, their junction with the main portion of the section rounded as there shown, to

prevent their crackin gfrom unequal expansion the parts designed for the generation of steam,

and hence a boiler of very great capacity may, when constructed as I have described, be contained in a very small space, while, at the same time, as the sediment formed in these steamgenerating parts must all descend into the cylinders D and E E, the boiler can be easily kept clean.

Claims.

I claim as my invention- 1. The combination, with the reverberatoryfurnace A, of the flat sections J J, made broadand the inside angles rounded, as shown, so

as to unite the said stay-bolts with the shell of the section upon a curve both inside and outside, instead of at an angle, substantially as hereinbefore set forth.

DAVID RENSHAW.

Witnesses THos. P. How, NNA. M. Nonrnecr.

d d d are gage-cocks. e

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