US220670A - Improvement in superheaters for steam-boilers - Google Patents

Description

H. SOHAUBEL. Superheater for Steam-Boilers.

WITNESSES IN VENTOR NPETERQ. PHOTO-UTHOGRAPHER. WASHINGTON. D C,

UNITED STATES PATENT OFFICE.

HENRY SCHAUBEL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO EDMUND L. LEVY, OF SAME PLACE.

IMPROVEMENT lN SUPERHEATERS FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 220,670, dated October 14, 1879; application filed July 28, 1879.

To all whom it may concern:

Be it known that I, HENRY SGHAUBEL, of Philadelphia, Pennsylvania, have invented a new and useful Improvement in Superheaters -for Steam-Boilers, of which the following is a specification.

My invention relates to that class of superheaters for steamboilers in which a superheating-chamber is combined with achimney and my improx ed superheater consists of an outer casing combined with an inner casing, which forms a detachable section of the chimney, but which is permanently secured to the said outer casin g, the main object of my invention being to avoid theexpense incurred in securing the superheater directly to the shell of the boiler, as usual, a further object being to permit the ready removal of the superheater and the ready application of a new one.

In the accompanying drawings, Figure I is a vertical section of a steam-boiler, illustrating my invention; Fig. 2, a plan view of the same, and Fig. 3 a modification.

The boiler to which myinvention is applied in the present instance is of the marineflue and return-tubular type; but it will be understood that it may be used in connection with all kinds of steam-generators.

A represents the shell of the steam-boiler; a, the trout tubesheet; b, the smoke-chamber; B, the superheating-chamber; d, the outer casing of the same; 6, the inner casing; D, the chimney, and h the pipe forming a communication between the steam-space of the boiler and the superheating-chamber, which has also an appropriate out-let-pipe,'as shown by dotted lines.

The inner casing, e, of the super-heater constitutes a section of the chimney, the lower portion of this casing being bolted or riveted to a branch, f, on the shell of the boiler, and the hpper end to the chimney proper, D.

Before the superheater is secured in its po sition it is a complete structure-that is to say, the inner and outer casings are permitnently riveted together, so as to be in a steamtight condition.

Several advantages are derived from this arrangement: First, the inconvenience and expense of securing the outer casing of the superheater to a continuous chimney in a steamtight condition is obviated; second, the superheater can be readily detached from the chimney for repairs or to make way for a new one; and, third, the boiler is not weakened by cutting away the shell at the point where the superheater is attached.

In Fig. 3 I have shown a modification, in which the super-heater is made in duplex form, and is combined with apair of boilers having two outlet-fines, the ordinary breeches-pipe being used at the top of the superheater.

I do not desire to claim, broadly, the combination of a superheating-drum with a chimney which passes through the said drum but I claim as my inventionflhe combination of a superheater, consisting of an outer casing, d, and inner casing, e, permanently secured together, with a chimney, the continuity of which is interrupted for the reception of the superheater, the inner casing of the latter forming a partof the chimney, all as and for the purpose set forth.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

HENRY SOHAUBEL.

Witnesses:

ALEXANDER PATTERSON, HARRY SMITH.

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