US 271416 A
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Description (OCR text may contain errors)
(No Model) W. w. CAREY.
WOOD RIM PULLEY.
Patented Jan.30,1883. Fig.1.
WTHESSES NITED STATES PATENT OFFICE.
WILSON W. CAREY, OF LOWELL, MASSACHUSETTS.
SPECIFICATION forming part of Letters Patent No. 271,416, dated January 30, 1883.
1 Application filed October 21, 1882. (No model.)
To all whom it may concern:
Be it known that I; WILSON W.-OAREY, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Wood-Rim Pulleys; and I do hereby declare that the same are fully described in the following specification and illustrated in the accompanying drawings.
This invention relates to improvements on the patent granted to me December 6,1881, for wood-rim pulleys, and it is carried out as follows, reference being had to the accompanying drawings, on which- Figure 1 represents a side elevation, and Fig. 2 a longitudinal section, of myimproved wood-rim pulley. Fig. 3 represents a crosssection of the iim on the line A B, shown in Fig. 1.
Similar letters refer to similar parts, whereever they occur, on the different parts of the drawings.
The central metallic spider is composed of the hub a and radial arms b b 12, provided in their outer ends each with a lateral perforation or eye, 0. in the same manner as set forth and described in my patent of December 6, 1881.
d d d represent segments of the middle felly, preferably made of hard wood, to which the side fellies or rims, e e e, are secured by glue and nails, brads, or screws. The center felly, d d d, is made to project inwardly beyond the side fellies, e e c, in-a similar manner as described in my patent aforesaid.
At the junction of each successive pair of middle fellies, d d, I locate a metal binder, f,
which is preferably made with ears or shouldersff, as shown in Fig. 1, or may be made with inclines on two opposite sides, it so desired.
The extreme outer end of each radial arm b I prefer to terminate as a projection, b, in a similar manner to what is shown in my aforesaid patent, which projection is adapted to project and rest into a corresponding recess in the metal binder f; but this is not absolutely necessary, and such projection may be dispensed with, if so desired.
Each metal binder f is secured to its corre sponding radial arm, b, by means of the bolt h,- which passes through a perforation in the binder f and a radial perforation in the end of arm b, as shown in Figs. 1 and 2, and is firmly secured by means of the said screw-bolt h, having head h, resting in a countersunk recess,f, in the metal binderf, and nuts 71/ h, located within the eye 0, as shown in the drawings.
In my previous patent the screw-bolts that secure the radial arms of the spider to the central felly were arranged to pass through the middle of each segment of such central felly, and this was objectionable, asit tended to weaken the central-felly segments, and to give an undue strain on such segments when the fastening-bolts were tightened. This objection is obviated in my present improvement, Where the segments d d of the central felly are solid from end to end; and by making the metal bindersff with shoulders f f,.I obtain a pressure of such metal binders both in the direction of the grain of the wood of the middle segments as well as laterally thereto when the nuts h h are tightened, and in this manner great rigidity and strength of the wooden rim of the pulley are obtained.
Mare wooden caps or blocks located one at the outside of each metal binderf, at the junction of two successive middle segments, d 01, so as to provide a uniform circular outer periphery of the improved wood-rim pulley, as shown in Fig. 1.
In making this my improved wood-rim pulley I saw out the requisite number of middle segments, (1 d,- of a shape as shown in Fig. l, and locate the metal bindersff one at each junction of two successive segments d d, and tighten the whole firmly together to the radial arms b b by means of the screw-bolts h h and their nuts h h. Afterward I secure to the sides of the middle felly, d d, the side fellies, e e, in the manner as described, after which the wooden rim of the pulley is turned true, as usual.
What I wish to secure by Letters Patent, and claim, is-
The herein-described improved wood-rim pulley, consisting of the solid middle segments, d d, the metal bindersffff, fastening-bolts and nuts h h h, side fellies, e e, and spider, with its radial arms b b and eyes 0 c, as and for the purpose set forth.
In testimony whereof I have affixed my signature in presence of two witnesses.
WILSON W. CAREY.
Witnesses ALBAN ANDREN, HENRY CHADBOURN.