US47323A - Improvement in tension-pulleys - Google Patents

Description

lliure STATES artnr Orifice.

1A. P. NIMES, OF BUFFALO, NE \V YORK.

IMPROVEMENT IN TENs|oN'-Pu| EYs.

Specification forming part of Letters Patent No. 47,323, dated April l'l, 1865.

" 0 all whom it 11mg/ conce/w,.-

Be it known that l, A. B. NIMES, ot' the city ot' Bnttalo, county of Erie, and State ot' New York, have invented certain new and nesful Improve-ments in Tension-Pulleys for Tightening Machinervelts, and I do hereby declare that the following is a full, clear, and exact description ot' the construction and operation thereof, reference being had to the accompanying drawings, making a part ot' this specification, in which- Figure l is a side elevalionof my improvenient. Fig. Il is a front elevation, partially in section, of same. t

The nature of this invention consists, first, in the construction of a rectangular sliding frame of cast-iron for the support ofthe tension-pulleys, so that a frame ot' the greatest strength and rigidity is produced, having in itself sufficient' weight to give the required tension to the belt; second, in the construe* tion of the journal-boxes in two partsan outer and inner part-the inner box being a spherical sleeve and the outer box a spherical socket, into which the inner box is inserted, by which the journals of the shafts running therein are prevented from binding or heating, when from any cause said journal-boxes have been or may be moved from their normal position; third, in supporting the tensionpulleys in a weighted sliding or hinged frame by means of journal-boxes so constructed and arranged as to be capable of ready adjustment to keep the axis of the tension-pulleys in exact line with that of the driver and prevent the belt from running off or working sidewise on the pulleys, without such adjustment causing the journals of the pulleys to bind or run hard in t-he boxes.

Letters of like name and kind refer to like parts in each of the igures.

A represents the tension-pulley frame, rect-4 angular in form, the whole frame being made of cast-iron and of sufcient weight to give the required tension to the belt, by which the greatest strength and rigidity are given thereto. The bottom cross-piece is extended, as

shown at A', forming a table. Longitudinal tongues A2 are formed on the sides of the frame, which tit in to grooves in the guide-posts between which the frame moves.

B represents the tension-pulleys, two in number, each bearing on one strctrh of the belt they are required to tighten.

C C represent the journal-boxes, made in two partsan outer'and inner partthe inner box, C', being a spherical sleeve within which the journal ot' thetension-pulley runs, (meaning by the term spherical sleeve a sphere or ball having a cylindrical hole bored through its center for the reception of` the straight journal of the shaft running therein,) and the outer` box, C, being a spherical socket within which the spherical sleeve: C g is contained. The outer box or socket, C, is divided into two halves, to permit of the insertion of the spherical sleeve therein. n

The outer box, C, is supported in the frame l A in a manner to provide for its vertical adl justinent, by being placed in the rectangular spaces formed by the projected jaws B and removable cap B2, bolted to thejaws, the cap allowing of the insertion of the boxes and holding them in place when in. The vertical sides of the boxes are grooved and correj sponding tongues formed on .the frame and cap, as shown at b3, which guide the boxes in their vertical adjustment. Setscrews b4, work`` ing through the jaws B', above and below the boxes, furnish the means for the vertical adjustment of the boxes.

I) represents oil-cups which communicate with the journals through the holes d', bored through the outer and inner box, the hole throughboth the outer and inner box being countersunk to keep open the communication with the oil-cup during any variation of the position of the boxes in their adjustment. A piece of gaspipe or tubing may be inserted into the inner box, projecting through an enlarged hole tothe oil-cup, which will also prevent the inner box turning or rolling too much in the outer box.

The advantages of this invention may ,be`

briefly set forth, as follows:

First. By making the tens1on-pulley `frame in one solid casting it may be given a strength l and rigidity it is impossible to obtain by any framing of wood, or wood and iron; alsoa certain amount of weight being required in any case, it involves no additional expense to put such weight into the frame itself, while the important element of strength and rigidityis obtained thereby.

formed on the cap B2, x

Second. From the construction of thejournal-box with the spherical sleeve and socket, any change in the position of the journalboxes, supporting the same shaft, with refervence to each other, does not affect the freedom of the journals, since the spherical sleeve will simply rock or roll in the socket and accommodate itself to the changed position of the shaft-journal. This construction also produces a journal-box peculiarly applicable to lines of shafting in machine-shops, elevators, Src., as it prevents the journals running therein from binding and heating, when, from any cause-such as settling ofbuilding, 85e.--

they may get out o f linej thus saving` a great loss by friction in the power transmitted, and greatly increasing their durability. In its adjustable feature it also furnishes aready means of bringing them back when, from any cause, they may be out of line.

Third. This feature is especially valuable in its 'connection with the tension-pulleys and frame, which are frequently used in places (for tightening elevator driving-belts, for example) in which the distance from the driving-pulley to the tension-pulleys is so great 2. The combination of the spherical sleeve C', within which the straight journal of the shaft runs, with the spherical socket C, for the purposes and substantially as set forth.

3. Supporting the tension-pulleys B in the frame A by means ofjournal-boxes C C', made capable otl adjustment, to bring the tensionpulley shafts in line with that of the driver, Without such adjustment causing thenr to bind the journals running therein.

' A. B. NIMES.

Witnesses:

Guo. W. WALL/ion, B. H. MUEHLE.

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