US215807A - Improvement in cylinders of steam-engines - Google Patents

Description

G. H. GORLLSS. Gylnderof Steam-Engines.

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Patented May 27,1879.'

UNITED STATES APM.Enr

GEORGE H. OORLISS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN CYLINDERS OF STEAM-ENGINES.

Specification forming part of Letters Patent No. 215,807, dated May 27, 1879; application filed February 6, 1879.

To all whom fit may concern.-

Beit known that I, GEORGE H. (loRLIss, of the city and county of Providence, in the State of Rhode Island, have invented certain new and useful Improvements relating to the Cylinders of Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My improved cylinder is provided with a ange at each end, constructed and arranged for making a steam-tight joint with an exterior cylinder or casing, whereby an annular space is obtained between the two, which, being filled with steam, constitutes a so-called steam-jacket.

The lian ges are so f'ormed that by their flexibility theycan accommodatethemselves,with ou danger of breaking, to the expansion and contraction due to considerable differences in temperature between the outer and inner cylinders.

I make the steam cylinder and casing in separate pieces mainly to secure with greater certainty reliable castings of uniform thick` ness.

Screw-threads are cut upon the periphery of the flanges, corresponding to interior threads cut upon the easing.

In order to facilitate the placing of the casing upon the cylinder, the diameterof one of the threaded flanges is made less than that of the other by an amountslightlyexceeding the depth of the thread, the corresponding threaded ends of the casing being similarly modified, so as fo lit the same After the casing is screwed upon the flanges, like a nut upon a bolt, the thread-joints are perfected -by compressing-bands applied upon each end of the casing directly over the threaded parts.

The flanges at each end of the cylinder pre sent a section in the form of an elbow, one eX- tremity of which section joins to the ordinary ange of the steam-cylinder, while the other makes joint with the casing. One part of' the section is parallel to the main cylinder-section, while the other stands atright angles to it. The rst-mentioned part of the flange is exible in one direction and the second in the other. The one accommodates expansion in a transverse direction and the other in a longitudinal direction.

Steam is admitted to the annular space or steam-jacket, and an exit is provided for the water of' condensation by suitable pipe-connections.

The accompanying drawing forms a part of this specification, and represents what I con.- sider the best means of carrying out the in-I vention.

c is the body of the steam-cylinder, and al a2 the elastic flanges. a3 is the outer casing, and a4 a4 the compressing-bands. Screwthreads are cut upon the periphery of the elastic anges, as shown at a5 c5, corresponding to interior screw-threads cut upon the casing a3.

In order to facilitate the placing of the casin g upon the cylinder in the process of construe tion, I make the diameter ofthe elastic threaded lian ge al larger than that of the corresponding ange c2 by an amount slightly in excess of the depth of the screw-thread a5, the correspondin g ends of the casing being fitted to the same. After the casing a3 has been screwed upon the flanges al a2, like a nut upon a bolt, the screw-thread joints a5 are perfected by the compressing-bands af a4, applied upon each end of' the casing directly over the threaded parts a5 a5.

It will be observed that thelanges a1 a at each end of' the cylinder present a section in the form of' an elbow, one extremity of` the elbow being joined to the ordinary lflange of the cylinder at co6, while the other extremity makes joint with the casing at c5.

I will mark the ordinary flange a6 at each end ofthe cylinder. It is adapted to perform its usual function of holding the bolts a, which confine the cylinder ends am, in addition to its function of joining to the elastic flange al or co2, and forming one end ofthe thin exten sion of the steam-jacket @which by my invention is allowed to extend to the flange a without interfering with the ordinary uses and funcA tions of the latter. i

One part, al, of the section is parallel to thc cylinder-body section a, while the other part, a3, stands at right angles toit. The part al is flexible in one direction, and the part as in.

the other direction. The part a" accommodates expansion and contraction in a transverse direction, and the part a8 in a longitudinal direction.

Steam is admitted to the annular space or steam-j acket a9, and an escape is provided for the products of condensation by suitable pipeconnections. (Not shown.)

Modiiications may be madel in the lforni of many of the parts.

The flanges al a2, joining the cylinder a and casing a3, may be corrugatedorl otherwise varied in form.

The compressing-bands a4 a4 may bc applied by shrinking them on or by forcing them on.

1n" the latter ease it will be understood that the bearing-surfaces am am should be slightly conical.

I claim as my invention- 1.A steam-cylinder, a, and anouter casing,I a3, joined by elastic flanges al a2, formed with an elbow-section, a7 a, adapted to allow of yielding elasticall y both in the radial and longitudinal direction, as herein' specied.

2. A jacketed cylinder for a steam-engine, constructed with the exterior part, a3, in a piece separate from the cylinder and united by screw-threads a5, as herein set forth and described.

3. A steam-cylinder having flanges al a2 joined tothe ordinary flanges a6, in the positions shown, and adapted to allow the steamjacket to extend quite to theend of the cylinder, and to allow the ordinary flange to serve its usual functions, as herein specied.

4. In combination with the cylinder a, ontside casing, a3, elastic flanges aI a2, and screwthreads a5, the compressing-bands a, adapted to serve as herein specified.

In testimony whereof I have hereunto set `my hand this lst day of' February, 1879, in the presence of ytwo subscribing witnesses.

GEO. H; GORLISS.

Witnesses: I i

JEssE WALRATH, GEORGE A. DODGE.

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