US406402A - moomy - Google Patents

Description

(No Model.) 2 sheets-sheet 1.

- J. G. MOOMY.

WUODEN PULLEY.

No. 406,402. Patented July 2, 1889.

2 Sheets-Sheet 2.

(No Model.)

J. G. MOOMY.

, WOODEN P ULLBY. l No. 406,402. Patented July Z, 1889.

N PETERS. Puma-ummm. wamingm. mc.

-which is formed of the rings a a a.

UNrTEE STATES PATENT OFFICE.

JOSEPH G. MOOMY, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE TAPER SLEEVE PULLEY VORKS, OF 'SAME PLACE.

WOODEN PU LLEY.

SPECIFICATION forming part of Letters Patent No. 406,402, datedJuly 2, 1889.

Application fled December 14, 1888. Serial No. 293,562. (No model.)

To all whom, it may concern:

Be it known that I, JOSEPH G. MOOMY, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvementsin Vooden Pulleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same'.

This invention relates to wooden split pulleys; and it consists in cert-ain improvements in the construction thereof, as will be hereinafter fully set forth, and pointed out in the claims. l

The invention is illustrated in the accompanying drawings, as follows:

Figure 1 is a side elevation of a completedl pulley made in accordance with my invention. Fig. 2 is an elevation View of one of the halves of the pulley looking from the position of the removed half. Fig. 3 is an elevation view of the face of the pulley. Fig. 4 is a side view of that part of the pulley-rim Fig. 5 is an elevation view of one of the halves of the part shown in Fig. 4, looking from the point occupied by the removed half. Figs. 6 and 7 show details of construction, and will be explained in place herein.

Like letters of reference indicate corresponding parts in all the figures.

The construction is as follows: The pulley-rim is made up of rings formed of segments, as is common in this class of pulleys. The central part of the rim is composed of as many rings as desired-say three, as in the drawings, marked d a CLL-and the remainder of the rim is composed of finishing-rings a a. The spokes of the pulley are composed of two cross-bars B B, which lie parallel with each other, one in each section of the divided pulley. On the sides of the bars B toward the shaft or cent-er of the pulley are two blocks C C, one on each side of the shaft or center of the pulley, and, preferably, equally distant therefrom. These blocks are preferably laid with the grain of the wood across the grain of the wood of the bars B; but this is not material, and they are let into the bars Bslightly.

The bolts D, which hold the'sections of pulley together, pass through the bars B and blocks C. In the square central space H, formed by the bars BB and blocks C C C C, there will be used such bushing-blocks as may be desired. These bushing-block are not shownin the drawings, as they form no part of this invention. The blocks C C on the opposite arms will be made sufficiently short so as not to set upon each other when the pulley is assembled, thus leaving the bars free to be slightly sprung by the bolts D D when the pulley is being clamped upon the shaft.

The manner of inserting and securing the bars B is as follows: After the middle part of the rim is formed by gluing the rings u. a a together, holes .E are bored, as shown in Fig. l, and the ring is then cut in two by a straight saw-cut S, which passes through the holes E diametrically. The halves of the middle part of the rim are then both cut by a saw, removing the piece b', and leaving the right-angled notch b, as seen in Fig. 6. The spoke-bars B are then put into the segments by seating them in the notches b, as seen in Fig. 7. Dowels b4 are put through the bars and into the segments, as shown, and the pieces b are cnt down to form the pieces b2, which are put in place over the ends of the bars B and secured by glue and dowels b3. Round pieces E are secured in the spaces formed by the holes E, as shown in Fig. 7, and the divided parts are again put together and the finishing-rings a a are put on as commonly. After the pulley-rim has thus been completed, with the arms B embedded therein, I put in dowels F F, which pass entirely through the rim in a diagonal direction. These dowels, like all the others, are put in with glue, and they are set diagonal to the line of the shaft, so as to hold the rings a a a d ct against lateral separation, somewhat in the manner of a do'vetail.

It will be seen that there are no nails or screws used in the pulley, which is an advantage inanany respects.

After the pulley is completed, as described,

the finishing-rings are cut by a saw, so that the pulley will divide on the line S S.

I am aware that split wooden pulleys have been made by first making -up the middle IOO part of the ring, then dividing that part, then putting in the spoke-arms, then putting on the inisl1ing-rings, and then dividing said rings so the pulleys will bisect, as described, and I shall therefore not claim these features of construction broadly.

That I claim as new is I. The combination, in a split wooden pulley, of a central rim part composed of the rings Ct', divided on the line S S and having the notches ZJ cut therein, the spoke-bars B, seated in said notches, the pieces b2, filling said notches, the inishing-rings a a, completing the rim and divided so as to biseot the pulley on the line S S, and the blocks C C on said spoke-bars.

2. The combination, in a wooden split pulley, of a central rim part formed of the rings a', divided into segments and having the notches I) eut at the ends of each segment, the spoke-bars B B, seated in said notches and secured by dow'els h4 Z1, the piece h2, formed from the pieces Z1', `Filling the notches b, the dowels b3, holding said pieces b2 and the bars B in place, and the iinishing-rings d, completing said pulley-rim.

3. In a wooden split-pulley, the l combination, with the rim A, spokcebar B, and fillingpiece b2, of the dowels b3 and b4, entering said rim at right angles to each other.

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

JOSEPH G. MOOMY. lVitnesses:

JNO. K. HALLOCK, WM. P. HAYES.

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