US477759A

US477759A - Fire-indicator

Info

Publication number: US477759A
Authority: US
Publication date: 1892-06-28
Anticipated expiration: 1909-06-28

Description

(No Model.) Y

M. W. ILES.

PIRE INDICATOR.

170.477,759. Patented June 28, 1892.

inventor".

inw

ing, this plant may be NITED STATES PATENT OFFICE.

MALVERN WV. ILES, OF DENVER, COLORADO.

FIRE-INDICATOR.

SPECIFICATION forming part of Letters Patent N o. 477,7 59, dated J une 28, 1892.

Application filed April l, 1892. Serial No. 427,328. (No model.) v I To all whom t may concern:

Be it known that I, MALVERN W. ILES, of the city of Denver, county of Arapahoe, and State of Colorado, have invented acertain new and useful device for Detecting Fires in Smoke-Mains, of which the following is a true and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates tothe plant used in connection with metallurgical furnaces for the purpose of saving the metallic fumes and particles driven off from the smelters or other furnaces with the gases, and, generallyspeaksaid to consist of a prolonged flue or smoke-main system through which the gases, tbc., are drawn and in which they are cooled preparatory to being forced through bags or screens, Which effect the tinal separation of the solid and metallic particles from the gases. Large quantities of dust and fume are deposited in the smoke-mains, and as this dust is exceedingly combustible it is very liable to catch fire from time to time, and the fire, if not checked promptly, causes great destruction and loss.

The object of my invention is to provide a simple and eflicient device by which a fire in the dust collected in the main can be promptly detected; and in consists in aseries of fusible metallic rods or bars, preferably of lead, which are inserted through the side of the main in such a Way as to lie Wholly or in part Within that part of the main Where the dust accumulates, these rods havinghandles,which extend on the outside of the main and by which the rods can be moved. By placing the rods as described above they are more or less buried in and covered by the accumulated dust, and I have found that the heat of this dust when ignited is sufficient to melt a leaden bar, and a Watchman, therefore, examining the bars from time to time and removing them by means of their handles can at once detect the presence of a tire in any part of the main, because when he moves the bar which is immersed in the burning dust he Will find the end is melted off. The fire in the main is therefore promptly located and detected and immediate steps taken to extinguish it, thus preventing damage, which would follow in the case of a general tire.

Reference is now had to the drawings, in

Which my invention is illustrated, and in Which- Figure l is an elevation of a bag-house or screen-house and of the smoke-main leading thereto. Fig. 2 is a longitudinal section through a part of the smoke-main provided With hoppers; Fig. 3, a cross-section through the masonry dustchamber which forms the first part of the smoke-main, and Fig. 4L a perspective view of one of the lire-detecting bars.

A is the dust-chamber, which communicates at one end with the smelters (not shown) and at the other with the sheetsiron main, (indicated at B, B', D, E, F, and G,) Cbeinga blower or fan used for forcing the smoke through the sheetiron main. It Will be understood that a portion, and only a very small portion, of the main is indicated in the drawings, which might rather be taken as a diagram than a view of a practicable plant. At intervals throughout the length of the main I provide openings therein, as indicated1 at a, b, aj, and fi, and through these openings I insert the me tallic bar J, the shape of which must be such that it will extend in part, at least, into that portion of the main which is usually covered by the accumulated dust and fume, as indicated at K. The handles J of the rods J extend to the outside of the main and are placed so that they can be conveniently taken hold of and the rods moved by the Watchman. lVhen the dust K catches fire at any point Where the detector-bar is provided, the end of the bar is promptiy melted off by the heat generated, and the watchman, therefore, in taking hold of the handles J is able to tell at once of the presence of re and to take such measures as will insure its prompt extinguishment.

Having now described my invention, What I claim as new, and desire to secure by Letters Patent, is-

In combination with a screen system f'or the gases from metallurgical furnaces and the mains leading thereto, a series of fusible metallic rods J, extending' into those portions of the main Where dust and fume accumulate and having handles J, extending through the sides of the main.

MALVERN W. ILES.

Vitnesses:

C. T. DYE, J. I-I. TUCKER.

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