US254628A - estrade - Google Patents

Description

(No Model.) Sheets-Sheet 1.

A. ESTRADE.

APPARATUS POR SUPERHEATING STEAM.

Patented Mam. 7,1882.

(No Mpdel.) 2 Sheets-Sheet 2,

A. ESTRADE.

APPARATUS POR SUPERHEATING STEAM.

Patented Mar. 7,1882.

Lam/f 6fm N. Prima Phnlwuxmgmpner. wnsningmm DA CA UNITED STATES PATENT OFFICE.

AUGUSTE ESTRADE, OF PERPIGNAN, FRANCE.

, APPARATUS FOR SUPERHEATING STEAM.

SPECIFICATION forming part of Letters Patent No. 254,628, dated March 7, 1882.

Application led November 2l, 1881-. (No model.) Patented in France September 10l 1880, and in England September 2S, 1881.

To all whom it may concern:

Be it known that I, AUGUSTE EsTRAnE, a

citizen of France, residing at Perpignan, in the Republic of France, have invented an Improved Apparatus for Superheating Steam, (for which I have obtained a patent in France, dated September l0, 1880, and in Great Britain, dated September 28,1881, No. 4,178,) of which the following is a specification.

Steam is usually superheated by passing it through tubes exposed to the direct action of tire, which rapidly destroys the material ofthe tubes, rendering them useless.

This invention relates to means whereby the superheating-tubes are protected against the destructive action of the fire. For this purpose the tube or pipe through which the steam is passed to be superheated is inclosed within an outer pipe in which water ofthe boiler circulates, the two pipes being kept concentric with one another by studs. The steam-pipe has placed within it at intervals a number of metal gauze or perforated disks, which, by checking and breaking up such vesicular globules as may be carried along with the steam, insures the dryness ofthe steam. In the boiler of a locomotive or portable engine super-heating apparatus of the kind described is conveniently'applied in the following manner: 'libe-f steam-pipe, having its mouth in the dome or highest part of the boiler, is carried forward along the interior of the boiler-crown to the fire-box, in the upper part of which it is bent round and backward and a little upward, the bent part within the fire-box being in closed within the outer protecting-pipe, which communicates at both ends with the waterin the boiler, and which should have connected to it a blowoif pipe to clear out sediment. In boilers of 'forms other than that employed for locomotive through the roof at B of the {ire-box, within which it is bent horizontal again, extending to the front, where it is bent back, and thence passes up through the roof again at G and is led along the boiler to the steam-cylinders.

Surrounding the steam-tube in the fire-box is a tube, D, of such a diameter as to leave a small annular space intervening between it and Aall round. The tube is fixed to the crown of the lire-box, the holes of which, through which the steam-pipe A passes, being ot' the same diameter as the tube D, so that the water from the boiler can pass freely1 into the annular space of the latter through the annular openings round A. The opening into the tube D at B is below thc water-level of the boiler, while that at Gr may advantageously be slightly higher than the other, and the tube itself also inclines upward from B to G, whereby a continuous circulation of the water through the tube in one and the same direction is established, facilitating the discharge therefrom ofthe particles of steam as they are generated therein. The steam-pipe is maintained in its central position within D by means of projections d d, formed on the interior of D. Within the steampipe are placed the disks of wire-gauze or perforated metal a a, held at equal distances apart therein by distance-pieces, while the end one is supported by a cross-piece fixed in the pipe.

The tube D is provided at its lowest point with a branch pipe, a, leading to the outside and provided with a cock, whereby any deposits within the tube may be discharged from time to time.

Having thus described the nature of my invention and in what manner the same is to be performed, l claim- 1. In a steam-superheater, the steampipe passing through the roof ot' the iireboX, extended horizontallyT therein, and thence passing upward through the roof of said fire-box for connecting with the cylinders ofthe engine, in combination with a tube inclosing that part ofthe steam-pipe located within the lire-box to create an intervening water-space between the two, said tube having its ends secured in thc roof of the tire-box and in communication with the water-space of the boiler, all substantially as shown, for the purpose described.

2. In a st eam-superheater, the steam-pipe passing through the roof of the lire-box, extended horizontally therein, and thence passing up- TOO l ranged transversely within said extended part of the steam-pipe, and a water-jacket or tube surrounding the latter, substantially as und for 1 the purpose described.

In testimony whereofl have signed my name to this specification, in the presence oftwo subscribing; Witnesses, this 2d day of November, A. D. 1881.'

AUGUSTE ESTRADE. 'Vitnesses:

J ULEs DUPONT, JULES DIGEoN.

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