US1029008A - Treadle mechanism. - Google Patents

Description

1*. M. 11111131111., TBEADLE MECHANISM. APPLICATION FILED'IEB. 24 1908.

Patented June 11, 1912.

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i- IIHHHI I P. M. PURBBR. TREADLE MBGHANISM. APPLICATION FILED 1113.24, 1908.

1,029,008. Patented June 11, 1912.

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Maw f It sTArEs NEri-t,TENT OFF FREDERICK IVI. EUREER, OE LYNN, MAssAoHUsETrswAssIGNoR To UNI'IED SHOE MACHINERY COMPANY, OE PATERsON, NEW JERSEY, A CORPORATION OE NEW JERSEY.

TREADLE MECHANISM. f

connection with the accompanying drawings, is a specication, like reference characters on the drawings indicating like parts in the several figures.

This invention relates particularly to t-readle mechanism for pounding and other l machines.

The invention is herein shown for the purpose of explanation as embodied in a machine for pounding up shoes, said machine being fully illustrated and described in Letters Patent of Great Britain No. 18,883 of 1904. This machine comprises a beating tool which receives from its actuating mechanism rapid reciprocating movements which are imparted through a shift-- able connection that is controlled by a treadle to vary the amplitude of the movements of the tool.

The object of the invention as applied to the illustrated machine'is to prevent the transmission to the controlling treadle of vibrations which may be caused by the rapid movements of the pounding tool and its actuating mechanism, and also to prevent the transmission of the shock 0r jar caused by the impact of the tool against the work.

A very import-ant feature of this invent-ion consists in the combination with mechanism which in its operation produces a vibrato-ry or the like movement and a treadle or other device operatively connected therewith, of

means for preventing the transmission of following description of a preferred em- Specication of Letters Patent. Patented June 11, 1912. Application filed February 24, 1908.

Serial No. 417,551.

bodiment of the invention and will be pointed out in the claims.

Figure 1 shows a side elevation of a pounding-up machine equipped with this invention; Fig. 2 `shows parts of themachine, concerned with this invention, when the treadle is depressed.

In the illust-rated application of the invention to a pounding-up machine the'apparatus comprises a driving shaft 2 mounted in bearings in the head of the machiner which rests on a column. The shaft has an eccentric pin t connected to one arm of a rocker 5 fulcrumed on the" shaft 6 and having an arm 8 provided in its frontside with a guideway. This guideway receives adjustably a block 10 that is connected through the link 12 with a lever 14 through which reciprocating movements are transmitted to a pounding tool 15. A work support 16 is arrangedto present a shoe in position to receive the action of the tool. The position Of the block 10 in the rocker, and therefore the amplitude of the reciprocations imparted to the tool, is determined by a foot treadle 2O connected by arod 22 with a segment lever 24, the teeth of which engage teeth on a small shaft 25 which is journaled in the fulcrum shaft 6. The toothed Vshaft 25 is also in mesh in another portion of its length with teeth on the rear face of the block 10. A spring 26 acting on the treadle rod normally raises the treadle and lowers the block 10 into a position relative to the fulcrum shaft 6 in which little or no movement is transmitted to the tool. Depression of the treadle increases and regulates the movement of the tool.

A block 30 movable in a fixed guide 3 and j l connected to the treadle, preferably through intermediate devices which will be described, is yieldingly attached to the lower end of the treadle rod by a bolt 32 and a springk 34 which is adjustably tensioned with relation to the spring 26 which uplifts the treadle rod. The bolt is threaded into a sleeve-like extension 35 of the rod, which is adjustable on the rod by the set screw 36, and can be screwed upon the bolt 32 to adjust the tension of spring 34. The bolt has a lug 38 projecting into a slot inthe block, which holds the bolt from turning. This connection between the rod and treadle provides that when the block 30 is depressed by the treadle the spring 34 is compressed and the upper end of the block separated from the lower end face of the rod extension 35, as shown by full lines in Fig. 2, When the treadle is thus depressed, vibrations of the treadle rod, caused by the reciprocating actuating mechanism and by the jar or shock ofthe pounding tool, are absorbed by the springs 26 and 34 and are only transmitted to a limited degree, if at all, to the treadle itself. It is to be observed that the spring 26 cushions or resists the downward thrust of such vibratory movement while the spring 34 cushions or yieldinglj7 resists the upward thrust of the vibratory movement, so that between the two springs the vibrations are largely, if not wholly, absorbed.,

The treadle might be fulcrumed at its rear end and connected directly with the block 30, but preferably the treadle is fulcrumed between its ends at 37 and is connected to the block 30 in the rear of the fulcrum. In this preferred construction a brace or strut 40 extends from the block 30, on which it is pivoted, obliquely to an abutment 42 which may conveniently be a p0rvtion of the machine frame. The upper end of the brace is adapted to have a sliding movement on the surface of the abutment and is preferably provided with an antifriction roller 43 for facilitating this movement. A link 44 extends from the rear end of the treadle to the brace 40, to which it is connected by the pivot 45 which, in the construction shown, is also the pin for the roller 43. The brace 40, extending between the block and the abutment, assists the spring 34 in resisting upward movement of the treadle rod, the portion of the thrust not absorbed by the spring being taken up by the abutment and the inertia of the parts. By adjusting the brace to vary its inclination to the treadle rod within certain limits, as by adjusting the block and rod extension vertically after loosening the set screw 36, the part played by this brace in resisting movement of the treadle may be increased or diminished and the facility with which the treadle can be depressed will be increased as the angle formed by the brace and rod is reduced. It is to be noted that the brace 40 and the link 44 form a flexed toggle, the

arms of which are connected to the block and lever while the knuckle rests against the abutment. Movement is transmitted between the rod and treadle by bending the toggle while the knuckle is at the same time caused to slide on the abutment because the block 30 and the adjacent end of the brace 40 are guided in fixed laterall position by the guide 3.

In the use of the machine pressure upon the treadle is transmitted through the link 44 to the upper end portion of the brace 40,

forcing it to slide along the abutment 42 toward the rod, and into a position less inclined to the rod. In this movement the block 30 is forced downwardly by the brace, preferably compressing the spring 34 and then acting through said spring and the bolt 32 to pull down the treadle rod and shift the block l() in the rocker 5 for starting and varying the movements of the pounding lever 14 and its tool 15. It may be observed here that this same t-readle rod is connected to the starting and stopping mechanism of the machine so that the first portion of its depression starts the machine in addition to shifting the block 10. This feature of the machine is explained in said prior patent. As the machine is operated the vibrations which are transmitted from the reciprocating lever andtool, which, in the machine shown, are actuated at the rate of about nine hundred (900) strokes per minute, back- ,wardly through the rod 22, as well as the shock and jar from the impact of the tool upon the work are absorbed and taken up by t-he springs 26 and 34 and the indirect connections 40, 42 and 44 between the block 40 and the treadle, and objectionable vibration of the treadle is reduced or entirely overcome..

It is to be understood that while the several features of this invention will preferably be used together, some advantage may be gained by the use of a portion only of the invention, as, for example, in a construction in which the treadle is connected directly t0 the block 30' or vother part cooperating with the spring 34.

I-Iaving explained the nature of this invention and described a construction embodying the several features thereof in the best form now known to me, I claim as new and desire to secure by Letters Patent of the United States l. In a 'machine of the class described, the combination with a treadle and -a treadle rod, of yielding means acting normally to uplift the rod, a block movable on the treadle rod lengthwise of the rod, a spring arranged to be compressed by force applied to the block in the direction to depress the treadle rod, and connections from the treadle to depress the block when the treadle is depressed.

2. In a machine of the class described, the combination with a treadle and a treadle rod, of yielding means acting normally to uplift the rod, a block, means yieldingly holding the block normally in abutting relation to the rod, a connect-ion from the treadle to the block acting through said yielding means to depress the treadle rod and serving to hold the block out of such abutting relation to the rod.

3. In a machine of the class described, the combination with a treadle and a treadle rod, of means for yieldingly uplifting the rod, a block, a yielding connection between the block and the rod arranged to be put under stress when the rod is lowered, and an eXtensible connection between the block and the treadle for lowering the block and rod.

4. In a machine of the class described, the combination with a treadle and a treadle rod operatively connected with a vibrating tool, of a block, a yielding connection between the block and the rod arranged to be put under stress when the rod is lowered, and an indirect connection between the block and the treadle constructed and arranged to absorb any vibrations that pass the block.

5. In a machine of the class described, the combination with a treadle and a rod, of means so related to the rod that said rod is vibrated therefrom, a flexed toggle having one member connected to the rod and the other member connected to the treadle, and an abutment with which the knuckle of the toggle has engagement.

6. In a machine of the class described, the combination with a treadle, a treadle rod and a block on the rod, of pivotally connected links forming a flexed toggle yieldingly connected at one end to the block and connected at the other end to the treadle, and an abutment for the adjacent ends of the toggle links.

7. In a machine of the class described, the combination with a treadle and a treadle rod, of a brace extended obliquely with relation to the rod, means yieldingly connecting the brace and the rod and normally holding said brace and rod in abutting contact, an abutment to be engaged by the other end of the brace, and an operative connection between the treadle and the last named end of the brace whereby the brace may be shifted along the abutment and caused to move the brace out of abutting contact and yieldingly pull down the rod.

8. In a machine of the class described, the combination with a treadle and a treadle rod, of means by which vibratory movements are imparted to the rod, a flexed toggle having one member connected with the rod by yielding means and the other member connected with the treadle, and an abutment with which the knuckle of the toggle has engagement.

9. In a machine of the class described, the combination with a treadle and a treadle rod operatively connected with a vibrator tool, of yielding means to absorb the vibrations imparted to the rod, and additional means interposed between said treadle and rod to prevent transmission of vibrations to the treadle.

10. In a machine of the class described, the combination with a treadle and a treadle rod operatively connected with a vibratory tool, of yielding means to relieve the rod of vibratory impulses acting in opposite directions thereon, and additional means to prevent transmission of vibrations from the rod to the treadle.

l1. In a machine of the class described, the combination with a treadle and a treadle rod operatively connected with a vibratory tool, of yielding means to absorb the vibrations imparted to the rod, an abutment and connections between the treadle and rod including a brace movable along the abutment for additionally preventing transmission of vibrations to said treadle.

l2. In a machine of the class described, the combination with a treadle, of a treadle rod having connection with a vibratory tool and arranged to control the amplitude of the vibrations of said tool, yielding means to absorb the vibrations imparted to the rod, an abutment, and a pivoted brace connecting the treadle and rod and arranged to be moved along the abutment by the treadle in such manner as to progressively obstruct the passage of vibrations to the treadle as the amplitude of such vibrations is increased. i

In testimony whereof I have signed my name to this speciiication in the vpresence of two subscribing witnesses.

FREDERICK M. FURBER.

' Witnesses:

C. F. SKINNER, ARTHUR L. RUSSELL. f'

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents, Washington, D. C.

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