US510283A - Speed-pulley - Google Patents

Description

(No Model.)

W. M. MG-INTYRE.

vSPEED PUL'LEYi Patnt'ed Deo. 5'-

UNiTED STATES PATENT OFFICE.

SPEEDY-PULLr- Y-` SPECIFICATION forming part of Letters Patent o. 510,283, dated December 5, 1893.

Application filed August 26,1893. Serial No. 484,137. (No model.)

To all whom t may con/cern:

Be it known that I, WILLIAM M. MCINTYRE,"

a citizen of the United States, and a resident of Wilkinsburg, in the county of Allegheny' and State of Pennsylvania, have invented certain new and useful Improvements in Speed-Pulleys; andI do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to improvements in what are known as speed pulleys, by which varying rates of speed may be communicated with a given rate of motion of the shaft with which the pulley is connected.

The object of the invention is to provide an improved device of the above character which shall possess superior advantages with respect to efficiency in operation.

The invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings: Figure 1 is a side elevation showing two pulleys con-` structed in accordance with my invention, connected together by a belt, and showing means for shifting the slidable parts of the pulleys. Fig. 2 is a similar view looking from the opposite side. Fig. 3 is a cross section on the line -os, Fig. 1. Fig. et is a detail perspective view of one of the pulleys and its shaft.

In the said drawings the reference numeral l designates a driving shaft formed with a number ot' equi-distant horizontal grooves 2. This shaft is journaled in the frame of a machine or in the standards or hangers, as may be required. In the present instance it is shown as having its bearings in standards 3. Fixed to the shaft is a series of triangular shaped segments 4, with alternating spaces 5 which register with the grooves in the shaft. Located in the grooves in the shaft are slides 5a, provided with similar segments 6. There are thus formed two cone-shaped parts, divided into sections, the cones pointing in opposite directions, and the segments of one fitting and slidable in the spaces between the other cone or part.

Located below the shaft l, is a similar shaft 7, having horizontal grooves 8. Fixed to this shaft are segments 9, forming a cone similar to that above described, and in the grooves in the shaft fit and work slides l0 provided with segments 12, arranged to slide in the spaces between the segments 9. The two pulleys above described are connected by a belt 13.

Oneend of each of the slides 5 and 9, is connected with or secured to a standard 14. This standard has apertures near each'end through which the said shafts pass and is horizontally slidable or movable thereon. Secured to this standard are guide rods 15, and a supporting bar 16, which pass through holes in one of the standards 3, and are connected together by a bar 17. s

Pivoted to the machine frame or base 18, is a lever 19, provided intermediate of its ends with arms 20,.which embrace the belt 13. To the upper end of this lever is pivoted one end of a connecting bar 21, the other end of which is pivotally connected with the sliding standard 14. The outer ends of the movable segments are connected by a band 23.

The operation will be readily understood. When it is desired to vary the speed of the driven pulley, the lever 19 is moved to the right or left which will actuate the standard 14, which in turn will move thecones comprising the pulleys in or out. VSupposing for instance it is desired to increase the speed of the driven pulley, the lever, Fig. 1, is turned to the right, causing the standard 14, to, be moved outward or away from the cones, and the slides 10, to be correspondingly moved, thereby increasing the circumference of the driving pulley. At the same time the slides of the lower pulley will be operated to decrease the circumferenceof this pulley. To accomplish this object it is necessary that the points of the sliding segments of one shaft should point in a direction opposite to the points of the segments of the other shaft. By this construction although the slides of both shafts move in the same direction, yet the circumference of one-pulley will be increased while the other is decreased, and vice versa. As the slides areithus moved the'belt will be correspondingly shifted by the arms on the lever, the belt line being at the junction of the two cones composing each pulley.

While I have described the pulleys as being arranged in pairs, a single pulley may be used if desired. In this case a drop or friction pulley is necessary to keep the belt taut. I have also described the pulley as being composed of fixed and slidable segments, but it is obvious that both sets of said segments may be made slidable, if convenient or desirable.

Having thus described my invention, what I claim is l. The combination with a shaft formed with a series'of horizontal grooves, and one series of segments secured to said shaft with spaces between aligned with the grooves in the shaft, of the slides fitting in said grooves and providedwith another series of segments Working in` said spaces; substantially as described.

2. The combination with the shafts, having horizontal grooves therein, the segments fixed to said shafts, the oppositely arranged movable segments, the slides fitting in said grooves with which said movable segments are connected, forming upper and lower pulleys and the belt connecting said pulleys, of the horizontal movable standard to which said slides are secured, the guide rods and supporting bar, the lever, the shifting arms, and the connecting bar, substantially as described.

In testimony that I claim the foregoing as my own I have hereunto afiixed my signature in presence of'tWo Witnesses. y

WILLIAM M. MCIN'FYRE.

Witnesses:

FRANK M. MAssENo, WM. G. STEWART.

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