US1147202A - Starting and stopping mechanism. - Google Patents

Description

H. W. WINTER.

STARTING AND STOPPING MECHANISM.

APPLICATION FILED JULY 25, I910.

Patented July 20, 1915.

' 3 SHEETSSHEETI I I/T/VESSES COLUMBIA PLANOGRAPH (IO-,WASHINGTON, D. c.

H. W. WINTER.

STARTING AND STOPPING MECHANISM.

APPLICATION HLED JULY 25. 1910.

1,147,202. Patented July 20, 1915.

3 SHEETS-SHEET 2.

Wl/[A/TU/ I 7 Mm: 532

COLUMBIA PLANOURAPH 60-, WASHINGTON, D. C.

H. W. WINTER. STARTING AND STOPPING MECHANISM.

APPLICATION FILED JULY 25. I910.

Patented July 20, 1915.

3 SHEETS-SHEET 3.

I/V/Z'A/ESSESZ [WK-$4M pi v HENRY W. WINTER, 0F IVIETHUEN, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON,

JERSEY.

- Specification of Letters Patent.

-NEW JERSEY, A CORPORATION OF NEW PatentedJuly 2c, 1915 Application filed July 25, 1910. Serial No. 573,669.

To all whom it may concern:

Be it known that I, HENRY W. WINTER, a citizen of the United States, residing at Methuen, in the county of Essex and State of Massachusetts, have invented certain Improvements in Starting and StoppingMech anisms, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to a starting and stopping mechanism for high speed machines, and is herein shown applled to a rotary sole. edge trimming machine. In operating machines of this character the workman has frequent occasion to stop the machine to grind or change the cutters, and the fact that the machine runs at a high speed occasions considerable loss of time if he must wait for it to stop of its own accord. Furthermore, if the operator indulges in the practiceof stopping the machine by holding something against the cutter shaft, he soon injures the bearings to such an (no tent that their adjustmentis disturbed and the smooth running qualities of the machine necessary to goodwork are impaired.

It is the object of this invention to provide a starting and stopping mechanism that shall be positive and reliable in operation, simple in construction and capable of ready adaptation to a variety of operating conditions. h

The specific embodiment of the invention herein shown is designed especially for use on an edge trimming machine, but it will be obvious to those skilled in the art that the invention is not limited in its application to machines of this type.

The invention will be clearly understood from the following description of apreferred form, reference being -made to the accompanying drawings, in which,'

Figure l is a side elevation of an edge trimming machine with the combined belt shifter and brake applied thereto; Fig. 2 is an end elevation of the machine; and Fig. 3 is a perspective view showing another arrangement of the belt shifter.

Referring more particularly to Figs. 1 and 2 of the drawings, 2 designates the frame of the machine which carries at its head two cutter shafts 4: and 6 and supports in its base a main driving shaft 8.

positions.

The cutter shafts are each belted to the shaft 8 to be driven thereby. Fast and loose pulleys 10 and 12 respectively are mounted on the driving shaft 8 to afford means for belting the machine to any' convenient source of power. Bolted to thebase of the frame near the driving shaft is a "pivoted on a bracket secured to the machine frame near the inner end of the slide 16 and has a slot formed in one of its arms to receive a pin 22 that extends through the bifurcated end of the slide. The other arm of the bell-crank lever is pivotally connected to one end of a rod 24 that is pivoted at its opposite end to a hand operating lever 26 fulcrumed on the machine frame at 28. It will be obvious that as the hand lever 26 is moved up or down its motion will be transmitted, through the rod 24: and bellcrank lever, to the belt shifting device to transfer the belt from one pulley to the other. i y p The brake mechanism comprises a brake wheel 30 fast on the shaft 8 and a brake lever 82 fulcrumed on the frame and carrying a brake shoe. that overlies the brake wheel 30 in position to be moved into or out of contact therewith. A rod 34 operatively connects the lever 32 with the hand lever 26. It should be noted that the point of connection of the brake rod 34 to the lever 26 lies between the fulcrum 28 and the 24 with the operating lever. By this "arrangement the movement imparted to' the belt shifter by the operating lever is'much greater than that given to the brake lever.

The hand lever 26 is movable in a vertical slot 36 cut in the machineframe and two notches 35 and 37 are formed in the wall of the slot, one; at each end thereof to receive and, hold the lever in either. of its extreme A spring- 88, connected at one end to the lever and at its opposite end to the frame, serves to hold thelever in either of the notches in which it may be positioned.

Assuming the parts to be in the position shown in the drawings with the belt on the loose pulley and the brake applied, it is merely necessary, in order to start the machine, to throw the lever 26 from the lower notch 37 into the upper one 35. It will be clear that a very slight upward movement of the lever will release the brake before the belt shifter has been moved far enough to do more than start the belt toward the fast pulley. Further movement of the lever, however, will shift the belt onto the fast pulley and start the machine. To stop the machine the lever is again moved downwardly into the lower notch. As soon as the lever is started on its downward movement, the slide 16 will be moved toward the right to throw the belt on to the loose pulley, but the brake will not be applied until the belt has been freed entirely from the fast pulley and the lever hasbeen forced down nearly to the lower limit of its movement. Since the connections from the operating lever to the belt shifter and brake are positive, the movements of the parts are positive and the cycle of operations is certain. The rods 24: and 34 are each threaded at their. ends so that they may be adjusted in their connections and by means of such adjustment the timing of the movements of the brake'and shifter may be varied.

When the driving belt runs on to the pulleys 10 and 1 2 from a point above the machine, the belt shifting mechanism will be arranged in the manner above described. In some cases, however, it is preferable to have the belt run up through the floor; and one feature of this invention, therefore, consists in providing a construction whereby the belt shifting mechanism may be arranged readily to meet these requirements.

Referring to Fig. 3, it will be noted that the casting 14 is there shown, secured to the frame above and to the left of the shaft 8. The bolts by which the casting is secured arereceived in holes indicated at 40 in Fig. 2. The slide 16 is positioned in the guide way of the casting 14: with the belt engaging rods 18 projecting downwardly instead of upwardly as before. The bell crank 20 also is reversed but its pivot is still in the same horizontal plane as before. The rod 241 is connected to the end of the operating lever 26 at a point equidistant from the fulcrum 28 with its previous point of connection. The change in level of the point of connection of the rod 24 with the bell crank 20 compensates for the change in level of the point of connection of said rod with the operating lever 26, so that the relation of the pivotal points of the mechanism is maintained constant, and the same cycle of movement occurs when the lever 26 is operated as before. N 0 change in the arrangement of the parts of the brake mechanism is necessary. With the belt shifting mechanism arranged in the manner illustrated in Fig. 3, the belt may be run on the pulleys 10 and 12 from any. point below the shaft 8.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine having a shaft and fast and loose pulleys mounted thereon, a belt shifting device for throwing the belt from one pulley on to the other, a brake for said shaft, an operating lever and independent positive connections between said lever and said brake and shifting device, the connection to the brake being attached to the lever at a point nearer to its fulcrum than the point of attachment of the connection to the belt shifter.

2. In a machine having a shaft and fast and loose pulleys mounted thereon, a belt shifter for'throwing the belt from one of said pulleys to the other, a brake for said shaft, an operating lever, a rod positively connecting said brake with said operating lever, a rod and bell crank lever. positively connecting said belt shifter with said operating lever and means for retaining said operating lever in either of its extreme positions.

3. In a machine having a rotary shaft and fast and loose pulleys mounted thereon, a bracket supported by the frame adjacent to said pulleys, said bracket having a guidewav formed therein, a sliding belt shifter positioned in said guideway, a bell crank lever having one of its arms connected by a pin and slot with said belt shifter, an operating lever fulcrumed on the machine frame, a rod connecting said operating lever with the other arm of the bell crank lever, a brake wheel mounted on said shaft, a brake lever pivoted on said frame and carrying a brake shoe arranged to engage said wheel, a rod connecting said brake lever with said operating lever, the point of connection of the brake rod to the operating lever being nearer to the fulcrum of the lever than the point of connection of the shifter rod with the operating lever, said operating lever being movable in a notched slot formed in the machine frame, a spring operating on the lever to retain it in any one of the notches in which it is positioned and provision for varying the effective lengths of said rods.

4. In a machine having a shaft and fast and loose pulleys mounted thereon, a brake mechanism comprising a brake wheel on said shaft, a pivoted brake lever cooperating with said wheel, an operating lever and a rod connecting said lever and brake; and a belt shifting mechanism comprising a bracket secured to the frame of the machine, a belt shifter supported thereby, a bell crank lever connected to said shifter and a rod connecting said bell crank and operating lever,

the machine frame having provision where- In testimony whereof I have signed my by the bracket may be secured thereto in difname to this specification in the presence of 10 ferent positions and the parts of said belt two subscribing Witnesses.

shifting mechanism being proportioned to cooperate with said bracket in any one of its HENRY WINTER different positions While maintaining con- Witnesses:

stant the operating relation of the belt shift- JOHN H. MGCREADY,

ing mechanism to the brake mechanism. JAMES Hommn.

Copies of this patent may be obtained for fixie cents each, by addressing the O'ommissioner of Patents, Washington, D. G.

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