US210941A - Improvement in adjustable exhausts for locomotives - Google Patents

Description

D. HA'RRIGAN. Adjustable Exhaust for Locomotives.

No. 210,941; Patented Dec. 17, 1878.

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UNITED Srrrrns PATENT DENNIS HARRIGAN, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOB OF ONE HALF HIS RIGHT TO JOHN F. ORAGKETT, OF LAOONIA, N. H.

IMPROVEMENT IN ADJUSTABLE EXHAUSTS FOR LOCOMOTIVES.

Specification forming part of Letters Patent No. 210,941, dated December 17, 1878; application filed May 11, 1878.

To all whom it may concern.-

Be it known that I, DENNIs HARRIGAN, of Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Adjustable Tip for the Exhaust for Locomotive-Engines, of which the following is a specification The object of this improvement is, in utilizing the exhaust or dead steam by conducting it to the smoke-stack for the purpose of improving the draft, to provide a cheap and effi cient device by means of which the blast may be regulated and adjusted as occasion may require.

By means of the invention or improvement below described expense and space are saved, as compared with inventions for a similar p urpose before invented or introduced, a vertical draft through the ports is produced, a great saving in wear is accomplished, an even dis tribution of the draft is attained, and the device is easily freed from cinders and deposit.

In the accompanying drawings, in which similar letters of reference indicate like parts,

Figure 1 is a plan view of a pair of exhaust tips embodying my improvement. Fig. 2 is a cross vertical section upon line as m, Fig. 1. Fig. 3 is a horizontal section upon line 3 y, Fig. 2. 2

In Figs. 1 and 2 the ports are open, or coincide, and in Fig. 3 they are partially closed.

n. represents the base. bis a rod extending to the cab,to be actuated by the engineer, and connected by means of the bell-crank c with the jointed lever d. This jointed lever is attached, by means of pins 0 c, to the projections c e,extendii1g from the sleeves or caps f f, which, by means of the ports above named, are partially rotated upon the cones g g, at the will of the engineer. These caps or sleeves f, which are, of course, situated within the in the caps f, and Z Z corresponding vertical ports in the cones g. Horizontal ribs or raised portions or strips a it, provided with and terminating in stops a it upon the sides of the caps f, fit into and slide in grooves in the upright project-ions or posts 12 12, extending from the lower edges of the cones g, thus keeping the caps and cones in their proper relative po sitions.

When a strong blast is desired, so as to drive the tire by creating a strong draft in the smoke-stack of thelocomotive, the cap or sleeve is rotated by the engineer until the ports Is in the cap and Z in the cone do not coincide or connect with each other, thus closing all passages save the central openings lmn. When the blast is to be lessened, the cap is rotated until the stop it strikes the post p, when the ports is l will coincide and form vertical, or nearly vertical, passages for the steam, thus lessening the pressure in the passage h, and consequently lessening the draft and blast. Of course, the blast is susceptible of being regulated bya partial opening of the ports, as in Fig. 3.

There are several advantages peculiar to this invention. The ports are so placed as when open to produce a nearly or. quite vertical draft, which, of course, is much stronger than a curved or tortuous draft, which takes the force out of the current of steam.

Again, the ports in the cap and also in the cone are placed in a true circle, thus insuring an even distribution of the draft, and preventing the fire from burning unevenly, as is apt to be the case.

On account of the shape of the cone and the corresponding shape of the cap the wear is slight and not noticed," as the cap, when it wears, is inclined to settle down upon the cone and fit, notwithstanding the wear. Were their sides vertical the wear would be more apparent, and they would soon become loose; also, the shape allows the cinders and deposit to free themselves.

The device takes up but little room in the smoke-arch, as the diameter of the cap is not for locomotive-exhausts, consisting of the cone g, provided with the vertical, or nearly vertitical, ports I and passage m, and the cap f, provided with the corresponding vertical, or nearly vertical, ports 70 and passage h, said parts being constructed and arranged substantially as and for the purpose set forth.

DENNIS HARRIGAN. Witnesses:

HENRY W. WILLIAMS, JOHN E. FRUMING.

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