US426117A - Pulley - Google Patents

Description

2 Sheets-Sheet .1.

(No Model.)

.J. s. EBERT.

PULLEY.

Patented Apr. 22, 1890'.

(No Model.) I 2 Sheets-Sheet 2.

J. S. EBERT.

PULLEY.

No. 426,1l7. Patented Apr. 22. 1890.

inn Snares arnnr OFFICE.

JOHN S. EBERT, OF BROOKLYN, NEW YORK.

PULLEY.

SPECIFICATION forming part of Letters Patent No. 426,117, dated April 22, 1890.

Application filed April 29, 1889. Serial No. 308,958. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN S. EBERT, a citizen of the United States, residing in the city of Brooklymin the county of Kings and State of New York, have invented certain new and useful Improvements in Pulleys, of which the following is a specification sufficient to enable others skilled in the art to which the invention appertains to make and use the same.

My improvements relate to the class of pulleys in. which a wooden rim is attached directly to the outer ends of metallic arms projecting from a metallic hub without the intervention of a metallic rim, the advantage of such construction being fully set forth in the applica tion referred to.

My present invention consists in the means employed for securing the wooden rim to the ends of the metallic arms, whereby I am enabled to finish the wooden rim completelybefore the hub and spokes are added, and where by a substantial connection between the parts is effected.

In the accompanying drawings, Figure 1 is a side elevation of my improved pulley; Fig. 2, asectional elevation of aportion of the same upon an enlarged scale. Fig. 3 is a section. through the hub and bushing upon plane of line 0: as, Fig. 2. Fig. 4 is an isometrical view of the split bushing Fig. 5, an isometrical view of one of the conical wedges, and Fig. 6 a similar view of one of the split sleeves against which the said wedge acts.

The wooden rim A is formed in the ordinary manner, and maybe turned and trimmed complete and true before the spokes O and hub B are attached.

The wooden rim A is formed with radial perforations a a, coinciding with the position of the outer ends of the spokes O, which latter are slightly shorter than the radius of the inner surface of the rim A. A. split sleeve D fits into the under side of each of the perforations a, each half (Z (1 being formed with flanges d d, which rest against theinnerfaee of the rim A and afford metallic bearings for the outer ends of the spokes C. A slightly-conical wedge E is inserted through the openings 0. into each of the split sleeves I) when. the latter are in position in the said perforations o. of the wooden rim A. These wedges E are perforated eentrally to admit of theinsertion of the screw-bolts F through the said wedges and into the outer ends of the radial spokes C, which are formed with female screw-threads c, which engage with the male screw-threads f, formed upon the inner ends of the bolts F. It will be seen that the heads f of the bolts bear against the outer or broad ends of the wedges E, so that as the bolts are screwed into the ends of the spokes O the wedges E will draw the outer ends of the spokes forcibly against the inner flanged edges of the split sleeves D,and will also spread apart the outer ends of the said sleeves D, so that the latter will displace and push back the adjoining fiber constituting the side walls of the perforations cc, embedding themselves in the wood, and thereby constituting practically dovetail joints between the wooden rim A and the metal spokes O. This construction affords a rigid and substantial means of securing the wooden rim to the metal spokes and hub, and enables me to finish the rim and the other parts separately and then assemble them quickly and conveniently when required-for actual. use. It also renders the parts interchangeable and facilitates their packing and transportation. This construction of parts and the method of securing the parts together may of course be resorted to whether the pulley is of the permanent or split pattern, the drawings illustrating myimprovements as applied to the latter form of pulley. \Vhen the split pulley is thus used, I design to use in connection therewith screw stay-rods G Gbetween the adjoining spokes O of the two halves, as shown in Fig. 1,these stay-rods setting into recessed lugs c 0, formed for their reception upon the sides of the spokes, the object being to insure perfect joints between the wooden sections of the rim A.

The hub 13 is of ordinary construction, and is provided, when the shaft to which the pulley is to be applied is of small diameter, with a split bushing ll, consisting of two castings 72. 72., formed with the interior bearingsurfaccs h h and with the exterior webs or ribsh 7L2, which fit into the hub B, by which the bushing is secured to the shaft in the usual manner through the medium of the bolts and nuts h b b I). I thus attain a light but substantial bushing especially adapted for this class of pulleys.

Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. In a pulley substantially such as described, the combination of the Wooden rim formed with radial perforation s, the split metal sleeves fitting in said perforations and resting against the outer ends of the metallic spokes, the Wedges fittinginto the split sleeves, the screw-bolts passing through said wedges, and the metal spokes formed at their outer ends with female screw-threads for the reception of the inner ends of the said screw-bolts, the Whole constructed substantially in the manner and for the purpose set forth.

2. The combination of the Wooden riin A,

the metallic hub B, and radial metallic spokes O, the sleeve D, formed of the two sections d cl, the edge E, and the screw F, the Whole arranged and operating substantially in the manner and for the purpose described.

3. In combination With the Wooden rim A, the metallic hub and spokes B C, screw F, Wedge E, and the split sleeve D, having the flanges d d, for the purpose and substantially in the manner described.

JOHN S. EBERT.

WVitnesses:

D. W. GARDNER, GEO. W. MIAT

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