US897441A - Belt-shifting means. - Google Patents

Description

No. 897,441. I PATBNTED SEPT. 1, 190a.

\ .ILWIRTH! BELT SHIFTING MEANS. APPLIOA'IIOI FILED D110. 9, 1907.

WITNESSES: INVENTOR.

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UNITED STATES PATENT OFFICE.

ERNEST WIRTH, OF SCI-IOPFI-IE IM, GERMANY, ASSIGNOR TO LOUIS GREINER, OF TOLEDO,

OHIO.

BELT-SHIFTING MEANS.

Specification of Letters Patent.

Patented Sept. 1,.1908.

To all whom it may concern:

Be it known that I, ERNEST WIRTH, a sub- 'ect of German and a resident of Schopfeim, I. W. Ba en, Germany, have invented a certain new and useful Belt-Shifting Means; and I do hereb declare the following to be a full, clear, an exact description ot the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to belt shifting apparatus, and has for its object the provision of a device of this class, which forms a strong and durable antifriction support for the belt when not on the driveulley, but which obviates the use on the sha t of the usual loose-pulley, and provides sim le and eflicient means for shifting the belt rom the pulley to the support or vice versa.

The operation, construction, and arrangement of the parts of my invention are fu ly described in the following specification and illustrated in the accompanying drawings, in which,

Figure 1 is a side'elevation of the device comprising my invention with an associated driveulley and belt. Fig. 2 is a top plan view t erect, and Fig. 3 is a transverse sec tion taken on the dotted line a; a: in Fig. 1.

Referring to the drawing, 1 designates a drive-shaft, 2 a drive-pulley carried thereby, and 3 a belt 0 erating on said ulley.

Suspended rom the ceiling by hangers 4, 4 or otherwise suitably supported at one side of the pulley 2, is the curved bar or member 5, which commences in advance of the vertical center of the pulle in the plane of its top and thence follows t e course of the belt for a portion of its distance around the pulley, as shown, so that the curved portion of the bar a roximately conforms to a segment of the pu ey rim. Projecting laterally from the curved portion of the bar 5 toward the pulley rim with their free ends terminating in close proximity thereto are a plurality of spaced spindles 6 each of whic carries a roller or revoluble sleeve 7. These sleeves .combine to form an antifriction segmental the function of the usual loose u the upper forward end of the bar 5, and in which the transverse shift-bar 9 is mounted for longitudinal reciprocatory movement. While the bracket 8 is shown as extendin upwardly and laterally of the bar 5 towar the belt 3 with its free end terminating in a pendent lip, which lip and the supporting leg of the bracket are provided with registering slide-wa s for the shaft-bar 9, any other form of bracket can be used if desired. The shift-bar 9 has its inner end, relative to the bar 5, extended over the belt 3 and provided with a pendent spindle 1.0 on which the revoluble sleeve 11 is mounted for contact with the contiguous edge of the belt when the shift-bar is moved to shift the belt from the pulley to the sleeves 7. The shift-bar 9 is normally retained at its limit of outward movement, as shown in Fig. 2, by the action thereon of the coiled contraction-sprin 12, which has one end attached .to the brac 6t 8 and its other end attached to the end of the shift-bar opposed to the spindle 10. A shift cord or chain 13 isattached at one end to a fin er 14 projecting from the inner or spindled end of the shift-bar, thence extends longitudinally of the shift-bar over a sheave 15 carried by an arm 16, projectin from the bracket 8, and thence downward in position. to be pulled by an attendant.

The mechanism em loyed for throwing the belt upon the pulle rom the sleeves 7, consists of the rear shi tbar 17, which is carried by the bracket or arm 18 for longitudinal movement transversely of the bar 5. The bracket or arm 18 is carried by the curved portion of the bar 5 and is shown as bein of similar construction to the bracket 8. rojecting laterally from the shift-bar 17 contiguous to the inner side of the supporting le of the bracket 18 are one or more ears 19, w ioh carry the s indles 20. project toward the shaft 1 and carry loose sleeves 21, which are intended to coact with the inner edge of the belt to throw it from the su porting-sleeves 7 upon the pulley when t 1e bar 17 is shifted for such purpose.

These spindles A coiled contraction-spring 22 connects the upward over a sheave 24, carried by an arm 25 projecting from the bracket 18, thence horizontally around the angled end 17" of the shift-bar 17 and back to the bracket 18 with its end suitably fixed thereto, thus causing a pull on the cord or chain to effect a movement of the shift-bar in the direction of the pulley against the ten sion of its spring.

It is a parent from the above description that to t row the belt from the drive-pulley to the supporting spindles 6 it is only neces sary to pull downward on the shift-cord or chain 13 to impart the requisite shifting movement to the shift-bar 9 against the tension of its spring; and to throw the belt from the spindles 6 to engagement with the pulley it is likewise only necessary to pull downward on the shift-cord or chain 28 to impart the requisite shifting movement to the shift-bar 17 against the tension of its'spring.

I wish it understood that I do not desire to. be restricted to the particular arrangement and construction of the arts shown and de scribed, as obvious mo ifications will occur to persons skilled in the art.

Having thus described my invention, what claim as new and desire to secure by Letters Patent, is,-

1. The combination with a pulley and the belt operating thereon, of a belt support at the side of the pulleyfindependent means movable laterally of the pulley for throwing the belt from the pulley to the sup ort and vice versa, and means associated wl-t each of said shifting means to yieldingly retain it in one position of its movement.

2. The combination with a pulley, of a belt sugport at the side thereof, and a set of beltsh1 ter members; capable tudinal reciprocatory movements in planes transverse to the pulley, one member being a sheave 26 carried by of relative longi,

movable to shift a belt from the pulley to the support and the other being movable to shift a elt from the support to the ulley.

3. The combination with a ulley, of a stationary beltsu port at the si e thereof comprising a member laterally spaced from the ulley and having a portion curved to conorm to a segment of the pulley, said member havingspaced belt supporting portions projecting toward the pulley, and laterally spaced longitudinally reciprocatory means relatively movable to shift a belt on and off the pulley.

4. In association with a pulley, a belt support comprising a part laterally spaced from the pulley and having sleeved projections thereon extending toward the pulley-rim and terminating in proximity thereto, said projections being arranged in the form of a seg ment of the pulley rim to adapt them to support a belt when shifted thereon from the pulley, means carried by the support for shifting a belt thereto from the pulley, ashiftbar carried by the su port for longitudinal movement laterally oi the pulley, said bar having a lateral projection extending between the projections on said part in the path of shifting movement of the belt, means acting on the shift-bar to normally retain it with its projection in contiguous position to said part, and a pull-member associated with the shift bar and adapted, when pulled, to effect a movement of the shift-bar from normal position to. throw a belt from the support to the pulley.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

ERNEST WIRTH.

Witnesses:

ALFRED WEYER, OTTMAR BEDENK.

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