US429175A

US429175A - George h

Info

Publication number: US429175A
Authority: US
Publication date: 1890-06-03
Anticipated expiration: 1907-06-03

Description

(No Model.)

G. H. OGI'LVY. COMPOUND TUBULAR SHAFTING.

No. 429,175. Patented June 3, 1890.

UNITED STATES PATENT OEEIcE.

GEORGE H. OGlLVY, on NEW YORK, N. Y.

COMPOUND TUBULAR SHAFTING.

SPECIFICATION forming part of Letters Patent No. 429,175, dated June 3, 1890.

' Application filed January 10, 1890- Serial No. 336,573. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE H. OGILVY, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Conipound Tubular Shafting, of which the followin g is a specification, reference being had therein to the accompanying drawings.

This invention relates to the construction of heavy shafting for steamboat-s and the like.

The object of my invention is to produce a compound shaft the separate parts of which shall be firmly locked together. The separate parts are much easier to fabricate than would be a single mass of metal, and the liability of serious defects in the shaft are largely diminished by reason of the parts being accessible for closer inspection than if the shaft were made in a mass.

Figure 1 is a perspective of a blank from which one section of the shaft may be made. Fig. 2 is a broken perspective view of the blank rolled or forged into a trough. Fig. 3 is a broken perspective view of the shaft-section formed for coupling. Figs. 4c and 5 are face views of the two shaft-sections, and Figs. 6 and 7 are side elevations of the same. Fig. 8 is a perspective of the completed shaft with retaining rings or bands.

A indicates a blank, preferably of steel or wrought-iron. The blank may be rectangular in section, but by preference the edges B will be beveled, as shown. The blank will be a little wider than the half-circumference of the proposed shaft. The blank is heated and drawn, rolled, or forged into the form of a trough, as at O. This trough will be a little more than a half-circle of about the proposed diameter of the shaft. The face of blank 0 is planed up by a planing-machine to the form D. (Shown in Fig. 3.) The plane faces E are a little above the center of the are forming the center of the shaft, while the faces F are below said center. The faces F are made by planing transversely of the part D, and by preference the faces E and F are of equal length. Two shaft-sections D are made, as in Figs. 4 and 8, the depressed portions F in one section corresponding with the elevated portions E of the other. The shaft-sections may be made exact counterparts, as shown, and the reversal of the ends will bring the two sections into matching relation with each other. The projections E, extending into spaces F, will interlock, being complementary to each other. The sections D will be more than a half-circle, if measured around from E to E, and less than a half-circle from F to F to give best results.

WVhen the two parts are turned together, as shown in Fig. 8, they are secured by hoops or rings G, which may be shrunk or forced on. As many hoops or rings may be applied as convenient, and these hoops may be of considerable thickness and great strength, as they can be arranged so as to come between the shaft-bearings.

The shaft-section can be made to tightly fit, so that water may be circulated through the hollow center.

The sections D, for large shafts, can be fabricated by much lighter machines than would be required to work the great masses of metal required for such solid shafts as are used in steamships. Furthermore, as both the outer and inner faces of the shaft-section are open to inspection any imperfection in the metal is almost sure to be discovered.

The shaft-sections will be held against (letachnient by the bearing-boxes, as well as by the rings, and any desirable form of boxes may be used.

hat I claim is 1. The method of making shafting, which consists in bending plates into curved sec tions, cutting away the edges of two such sections into alternate projections and depressions, turning the edges of the two sections together, so that the projections will intermesh, and securin the parts together by confining-bands, substantially as described.

2. The shaftdescribed, consisting of nearly semi-tubular sections with projections and depressions on their plane faces, said faces turned together, so that the projections interniesh, and having confining rings or bands, in combination, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE H. OGILVY.

Witnesses:

DELIA V. QUINLAN, Louis HOLLANDER.