US371480A - Fbank a - Google Patents

Description

(No Model.)

P. A. SHOEMAKER.

BELT SHIFTER.

No. 371,480. Patented Oct. 11, 1887.

Fig.1.

27 in/n14 UNITED STATES PATENT BELT-SHIFTER.

SPECIFICATION forming part of Letters Patent No. 371,480, dated October 11, 1887.

Application filed July 1, 1887.

To aZZ whom, it 77mg concern.-

Be it known thatl, FRANK A. SrtoEuAKER, of the city of Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Belt-Shifters, of which the following is a specification.

This invention relates to an improvement in belt-shifters, and has for its object to construct a simple device of this kind, whereby the belt can be readily and conveniently shifted and secured in position,and in which the operative parts are arranged overhead, where they are not liable to he accidentally displaced or to interfere with the free movements of the work men.

My invention consists of the improvement, which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a front elevation of my improved belt-shifter. Fig. 2 represents a vertical crosssection in line x 00, Fig. 1, partly in elevation. Fig. 3 is a fragmentary front elevation of the shifter, showing the parts in a position opposite to that shownin Fig. 1. Fig. 4 is avertical section in liney y, Fig. 2. Fig. 5 is ahorizontal section in lineyy, Fig. 1.

Like letters of reference refer to like parts in the several figures.

A A represent a tight and a loose pulley mounted side by side upon a horizontal shaft, (0, and B is the belt applied to said pulleys.

0 represents thehorizontal shifter-bar, which is supported by depending bearings or hang ers D,secured to the ceiling or other support; and c is the shifter-fork, secured to the bar 0 and bearing against opposite edges of the belt in a well-known manner.

E represents a shifting-plate which is pivoted to the front side of avertical supportingbar, 0, by a pin or stud, e, and connected at its lower'end to the shifter-bar O by a connecting-rod,f, so that by swinging the plate E on its pivot the shifter-bar will be moved longitudinally to shift the belt from one pulley to the other. The plate E is provided with cams or inclines g g, which extend upwardly from the lower end of the plate to a point about in line with thepivot e.

h h represent stops or projections formed on the plate E at the upper ends of the inclines g g.

I represents an upright frame or movable support which slides upon thevertical supporting bar or rod 6, and is provided at its up per and lower ends with lugs or ears i 2', formed with square openings, through which the vertical bar e passes.

t represents a rope or cord attached to the upper end of the support I and passing over a pulley, J, arranged above the support I, the lower end of the rope terminating within convenient reach of the operator, so that the support can be raised and lowered on the bar a by means of said cord.

K represents a shifting dog or pawl pivoted to the lower ears of the movable support Land provided at its lower end with a weight, k, which retains the pawl in a vertical position. The pawl K is provided at its upper end with a forwardly-projecting pin or stud, Z, which is adapted to bear against either of the cams or inclines g g.

m'represents a projection formed on the up per end of the support I and adapted to engage in one oftwo notches or recesses, n a, formed in the upper portion of the plate E, which is curved concentric with the pivot ofsaid plate. The latter is provided on its rear side with pins or stops 0 0, which strike against opposite sides of the supporting-bar e andlimit the swinging movement of the plate E. The stops 0 0 arrest the movement of the plate E and shifting-bar at the extreme of either move ment.

If preferred, the stops 0 0' on the plate E may be omitted, and the shifter-rod 0 may be provided with collars which strike against the inner sides of the hangers D and limit the movement of the shifter-bar, as represented in Fig. 1.

Assuming that the parts are in the position represented in Fig. 1, upon raising the support I by means of the rope the horizontal pin Z of the pawl K rides up on the inclineg and strikes the stop It at the upper end of saidincline. The continued upward movement of the support I causes the pawl K to swing on the plate E on its pivot in the direction of the arrow in Fig. 1 until the plate reaches the position represented in Fig. 3, thereby moving the shifterbar 0 to the position represented in Fig. 3 and shifting the belt B from the pulleyA to the pulley A. When the belthas been shifted,the

support I is allowed to descend and rest upon the upper end of the plateE,in which position of the support the projection m enters the notch nand secures the plate and the parts connected therewith in this position. When the support I is in its lowest position, as represented in Fig. 1, the pawl clears the plate E. The upper portion of the pawl K is bent inwardly, as shown in Fig. 2, so as to enable the same to pass behind the plate E when the support I is raised. The incline or cam g of the plateE now stands above the pawl K, and upon raising the support I the pin Z of the pawl engages against the incline g and stop h and causes the plate to swing into the position represented in Fig. 1, thereby moving the bar 0 in the opposite direction and shifting the belt back upon the pulley A.

I claim as my invention- 1. The combination, witha shifter-bar, of a shifting-plate connected therewith, and a shifting pawl attached to a movable support, whereby the shiftingplate is moved in opposite directions, substantially as set forth.

2. The combination, with a shifter-bar, of a shifting-plate connectedtherewith, a shiftingpawl attached to a movable support,whereby the shifting-plate is moved in opposite directions, and a projection formed on the movable support and engaging with the shifting-plate,

whereby the shifting-plate isheld in position, substantially as set forth.

3. The combination, witha shifter-bar, of a shiftingplateconnected therewith and provided with locking-notches, a movable support provided with a projection and adapted to'engage in either of said notches,and ashifting-pawl attached to said movable support, substantially as set forth.

4:. The combination, with the shifter-bar O and the movable support I, of a pivoted plate,E, connected with the shifter-barCand provided with inclines g g and stops it h, and shiftingpawl K, pivoted to the support I below the plate E and adapted to engage against the stops h h, substantially as set forth.

5. The combination, with the shifter-bar G and the movable support I, provided with a projection, m, of a pivoted plate,E,connected with the shifter-bar O and provided with inclines g g, stops h h, and notches or recesses n n,formed in the upper end of the plate E,in which the projection ,m engages, and a shifting-pawl, K, pivoted to the lower end of the movable support I, substantially as set forth.

\Vitness my hand this th day of May, 1887.

FRANK A. SHOEMAKER.

Witnesses:

CARL F. GEYER, FRED. O. GEYER.

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