US136743A - Improvement in pegging-machines - Google Patents

Description

G. W. MAN 80 N.

Pegging-Machines Patented March 11,1873. 7

AM. mommuos/wmcm mmqsoane'smocass) STATES PATENT QFFICE.

GEORGE i' w." MANSON, or AUBURN,-MAINE, ASSIGNOR or ONE-HALF HIS I RIGHT TO ADDISON A. MILLER, or SAME PLACE.

IMPROVEMENT IN PEGGING-MACHINES.

Specification forming part ofLetters Patent No. 136,743, dated March U, 1873.

Toall whom it may concern:

Be it known that I, GEORGE W. MANSON, of Auburn, in the county of Androscoggin and State of Maine, have invented certain new and useful Improvements in Pegging-Machines, of which the following is a specification:

This invention relates to an improvement in machines for pegging shoes, &c., and its object is to overcome the tendency of the revolvingshaft crank-pin employed in imparting'a vertical movement to a reciprocating needle or awl carrier, to continue its revolution after the driving power has been disconnected therefrom, which renders it necessary to apply the hand of the operator to said shaft, for arresting its movement, to bring the needle-carrier into the proper position for a renewal of the operation, which involves great risk of injury to the hand. To this end my invention consists in the combination of a spring of any suitable form and construction with the shaft operating the awl-carrier, the function of which is to arrest the movement of the driving-shaft after the belt has been disconnected therefrom and for drawing the needle or awl carrier to the limit of its downward stroke as soon as the machine is stopped, as hereinafter more fully described.

In the accompanying drawing, Figure 1 represents a side elevation of part of a peggingmachine embodying my invention, and Fig. 2

an end view thereof.

The frame or body of the machine for supporting the operative mechanism is of the usual construction, and as much of the same as is necessary to illustrate my invention is designated by the letter A. In the upper end of said frame is journaled a horizontal shaft, B, the front end of which carries an eccentric Wrist-pin, b, which extends into a slot formed in avertically-reciprocating needle-bar or carrier, O, or is connected in any other suitable way for imparting by its rotation a reciprocating movement to said needle-carrier. Power is transmitted to the revolving sh aft'B by means of a driving-belt which passes over a fast pulley, D, located on said shaft. A loose pulley, E, is arranged in proper.relation to the fast pulley D for receiving the driving-belt when it is desired to arrest the movement of the awlcarrier. The parts above recited are of the ordinary construct-ion common to machines of this description.

To the rear end of the driving-shaft is affixed a wheel or disk, F, which is provided with an eccentricallyasituated wrist or crank-pin, G,

which receives the upper end of a rod or arm, H, the lower end of which is connected with the free end of a bent-plate spring, I. Said spring, as represented in the drawing, is secured to the frame of the machine by an attaching-arm, K, or in any suitable manner.

The operation and advantages of a spring arranged as described are as follows: In pegping-machines it is necessary to arrest the movement of the awl or piercing instrument at different stages of the work, and for this purpose the driving-belt is shifted from the fast to the loose pulley. If the machine runs at a great speed the momentum is such that the driving-shaft continues to make several revolutions after the belt has been shifted, and thus the awl-carrierwillobviously continueitsmovement and often be arrested in an elevated or undesirable position, when it should always be at the limit of its downward stroke before resharing the operation. For carrying the needle-carrier into the latter position it is generally necessary in machines as heretofore constructed to grasp or turn a hand wheel or disk on the driving-shaft while in rotation, which is liable to produce abrasion or injury to the thumb or finger. For overcoming these defects I provide means for automatically drawin g the needle-carrier into the proper position by arresting the movement'of the driving-shaft the moment the belt has been disengaged.

The spring arranged as shown, or, if preferred, any other suitable spring capable of performing the same functions, being connected with the driving-shaft, will be' drawn up or compressed when the crank-pin to which it is attached by the connecting-rod is going over the center, and when the belt is shifted to the loose pulley the reeoiling of the spring will pull the shaft and wrist-pin always into the same position and with the awl at the limit of its downward stroke. Another advantage offered by the use of my invention lies in the fact that the throat of the machine is prevented from clogging, which is generally the case if the awl is not arrested at the end of its downward stroke, for when stopped above the table the throat is open and allows the pegs to drop therein, causing the same to burst or rendering it necessary to take the same apart for removing the collected pegs. If the awl goes part or all the way up, when the machine is stopped a peg would drop in the throat, and as the awl comes down another peg will drop in, so that in this way the throat will be sometimes bursted.

In pegging-machines as now constructed the operator has to stop the machine four times in pegging each shoe, and each time he is liable to lose the end of his thumb. The machine I runs at great speed and the momentum is such that the main driving-shaft will make several revolutions after the belt is run onto the loose pulley, and the awl is as liable to stop at one point as another, when it should always be down to commence work. To bring it into po sition the operator has to reach higher than his head each time before starting and take hold of a pulley and turn it enough to set the awl down. There is a cam on the shaft in connection with this hand-pulley'that will take 01f the thumb unless the operator is very careful. All this consumes time and is dangerous, and the cam hasto be covered by a guard to prevent this danger, but which is found to be in the operators way, and is usually removed by him.

Having described my invention, I claim- In a pegging-machine, the combination with the awl-carrier and its driving-shaft of a spring or springs connected to said shaft and operating in the manner described, for gaining the advantages specified.

GEORGE W. MANSON. Witnesses:

ADDISON A. MILLER, AUGUSTUS M. PULSIFER.

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