US129634A - Improvement in steam-bojler-furnace crowns - Google Patents

Description

L. H. WAUGH, J. A. HANGLIN & J. GRAHAM.

improvement in Steam-Boiler Furnace-Crowns.

N0.129,34. Patentedluly16`,1872.

.mmmm A 1532, L@ 'Vzw O (D EN UNITED STATES PATENT OFFICE.

LEE H. WAUGH, JOHN A. HANGLIN, AND JOHN GRAHAM, OF WYANDOTTE,

KANSAS.

IMPROVEMENT IN STEAM-BOILER-FURNACE CROWNS.

Specification forming part of Letters Patent No. 129,634, dated July 16, 1872.

SPEcnrroATroN.

We, LEE H. WAUGH, JoHN A. HANGLIN, and J oHN GRAHAM, of the city of Wyandotte,

in the county of Wyandotte and State of `Kansas,`have invented certain Improvements a specification:

rJIhe main feature of our invention consists in a new method of attaching the crown-bars of the fire-box to the crown-plate, so as to supersede the necessity of washers around the bolts connecting the bars and plates, and which washers, in the present mode, rest upon the upper surface of the crown-plate, and around which accumulates the scales from the upper surface of the rire-box and other substances, so as, in connection with the washers, materially to affect the radiation of heat through the crown-plate to the water in the boiler.

The object of the invention is to prevent this accumulation, and, in case this should occur, that, in consequence of the smooth surface of the plate, the same can be easily removed by washing or otherwise.

Description of the Accompanying Drawing.

Figure 1 is a half-sectional end view of the crown-bars as attached to the crown-plate of the fire-box. Fig. 2 is an end view of the fire-box with the crown-bars and the connecting bolts in proper position, without washers on the crown-plate. Fig. 3 is a plan, showing the hollow crown-bars with the heads of the connecting screwbolts. Fig. 4 is a solid crown-bar, the shaded section of which shows the perforations as counterbored and the position of the connecting screw-bolt. Fig. 5 is an upper section of the solid crown-bar, showing the perforations for the bolts.

General Description. When the ordinary skeleton or double crown-bar D D is used in connection with our square and seven-eighths of an inch in thickcorresponding perforations through the crownl plate, screw-threaded. These perforations are for the purpose ofreceiving a headed screwbolt, threaded its entire length, passing through the crown-bar into the crown-plate, by which they are rmly connected together, as represented in Fig. 1 of the drawing, G C C C. These connecting-bolts, at their upper ends, are properly headed, and rest upon square pieces of iron, through which they pass, as seen in Fig. l, C G C C. The lower ends of these bolts are screwed through the crown-plate and extend into the fire-box sufficiently to receive nuts on their lower ends, which are to be firmly screwed up to the crown-plate; or theV bolts may be riveted in the ordinary way to the plate.

When the crown-bars are not constructed as above described, but of one solid piece of iron, the perforations are counterbored from the bottom of the crown-bar upward to seveneighths of an inch from the upper side. The

4space in the perforations, from the upper side of the crown-bar Lto the counterboring, has the spiral groove, as above described, in relation to the hollow crown-bars, and for the same purpose, as seen in the shaded section of Fig. 4 of the drawing, D D. The proper adjusting of the screw-bolts and their positions in the crown-bars and through the crownplate, and their mode of fastening to the crown-plate in the nre-box, are substantially as above described.

1. The bolts 0 C, screwed both into the crown-bars and th crown-plate, for the pur- C C and crown-plate, as and for the purposes pose of avoiding the use of Washers on the described.

top of the crown-plate, substantially as set L. H. WAUGH. forth. I J. A. HANGLIN.

2. The double crown-bars D D, connected Witnesses: J OHN GRAHAM. by the parts a a, provided with screW-thread- XV. J. BUCHAN,

edperforations, in combination Withthe bolts JOHN R. HALE.

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