US376520A - Device for constructing arches or centers for furnaces - Google Patents

Description

(N0 Mode-1.) I

I A. FARLEY. DEVICE FOR GONSTRUQTING ARGHES 0R CENTERS FOR FURNACES. No, 878,520. Patented Jan. 17, 1888.

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ALBIN FARLEY, OFVPITTSBURG, PENNSYLVANIA.

DEVICE FOR CONSTRUCTING ARCHES 0R CENTERS FOR FURNACE S.

SPECIFICATION forming part of Letters Patent N 0. 376,520, dated January 17, 1888.

Application filed March 1887. Serial No. 220,870.

vfor Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in-the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to a portable device for constructing arches or centers for furnaces, the object being to provide a means whereby arches or centers over furnaces, 850., may be built on a portable frame, and also to provide a means for adjusting the frame for the purpose of raising or depressing the spring of the arch; and with these ends in view myinvention consists in a number of segments of circles and a device for sustaining the same in the proper position, together with certain details of construction and combination of parts, as will be fully described hereinafter.

In the accompanying drawings, Figure l is a plan view of my device for constructing arches constructed in accordance with my invention. Fig. 2 is a side sectional elevation of the same. Fig. 3 is a perspective view of one of the segments.

To put my invention into practice I construct a number of segmental sections, a, forming a complete circle and of sufficient strength to sustain a heavy load placed on the top of the same. I now provide a threaded shaft, 1), having secured thereon a sleeve, 0, of such construction as to properly support the smaller ends of thesegments a. A small crank, d, at the upper end of the threaded shaft b affords a means for turning the shaft and operating the sleeve. It will be seen that the sleeve 0 has a flange near its opposite ends, so as to receive between them the inner ends of the segments, so that they may be positively moved up or down, and this sleeve should be properly threaded internally to engage the threads of the rod.

(No model.)

In operation I provide asuitable number of standards, f, and arrange them about the perimeter of the furnace g, on which the broad endsof the sectionsa are placed. The threaded shaft 1), I now place in the center of the furnaceg and adjust the sleeve 0 to a suitable height, representing the spring of the arch. The sections a are now arranged or placed in position, supported by the postsfand shaft 1),

and adjusted up or downuntil the exact spring is givento the arch about to be built. 7

Whenthe arch is finished, the nuts above and below the sleeve 0 are revolved back from the same and the sustaining-postsf removed, which operation will allow the segments to be easily removed without destroying or in any wisebreaking the same.

With this construction a-suitable frame for supporting an arch while being constructed can be built in a short time and can be used any number of times.

I am aware that it is not new to provide a frame for constructing arches and domes, which consists of segments and a vertical shaft having a fiangednut or ring thereon, the segments having their inner ends flanged to engage the upturned flange ofthe ring,and designed,when the arch has been formed and the rod turned, to let the segmental sections fall into the structure, and therefore do not claim such construction, broadly.

Having thus described my invention, what I' claim, and desire to secure by Lt tters Patent, 1s

The improved apparatus herein. described for use in the construction ofarches and domes, the same consisting of the segmental sections, the central vertical screw, the threaded sleeve thereon having flanges, as shown, to engage the upper and lower sides of the segments at their inner ends, and the hand-lever on the upper end of the shaft, whereby the said segments may be positively engaged and moved up and down to accurately attain the desired spring, substantially as specified.

' ALBIN FARLEY.

WVitnesses:

H. H. SALLADE, M. E. HARRISON.

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