US1274196A - Pattern-cutting machine. - Google Patents

Description

C. REED.' PATTERN cuTTTNG MACHINE.

APPLICATION FILED MAR.14. 19'18- v Patented J ulyA 30, 1918.

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C. E. REED.

PATTERN CUTTING MACHINE.

APPucATloN FILED MAK. 14, |918.

Patented July 30, 1918.

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CHARLES E. REED,0E cHicAGo, ILLiNois.

PATTEinv-cnii'inieL MACHINE.

Specification of Letters Patent.

Patented July 30,1918.

Application filed March 14, 1918. Serial No. 222,382.

To all whom it may concern:

Be it known that I, CHARLES E. REED, a citizen of the United States, residing at Chicago, in the county. of Cook and'State of Illinois, have invented a new and use-ful Improvement in Pattern-Cutting Machines, of which the following is a specification.

My invention relates more particularly to the mechanism for operating theV powerdriven punch which' coperates with the relatively stationary die, as for example as employed in pattern-cutting machines for making shoe patterns, my .invention having been devised for use more particularly in the general type of machine forming lthe subject of United States Reissued4 Letters Patent No. 11,569, granted to me Sept. 29, 1896, and employing a pantographicframe equipped with a model-tracing element and a pattern-cuttingV element in the form of a power-driven punch.

It is desirable in pattern-cutting mechanism of this type las employed in patterncutting machines, to provide for the'adj'iistment of one 0f the members of the die and punch mechanism relative to the other thereof for adjusting these elements intoV and outV of operative position relative to each other, in order that during the cutting of a pattern, which often requires frequent interruptions in thecutting operation, the movable element of the die and punch mechanism may continueits movement, but idly, during such interruptions. The'mechanism as heretofore provided with the view to accomplishing this result, while operating satisfactorily When the punch element is rotated relatively slowly, presentsthe disadvantage of setting up undue vibratiton in the mechanism where the power shaft and the shaft driven therefrom and operating the punch member, are not in true alinement, with the result of impairing the operation of the vmachine and producing unduey wear of the parts.

My primary object is to provide a construction of mechanism of the general character above referredto, which will ,permit of its movement, under the controlof the operator, into and out of a position for causing the punch element connected there-` with to be in operative position relative to its coperating punch element, and in which objectionable vibration `of the mechanism, even when the drive and driven shafts are not in direct alinement, will be avoided.

Referring to the accompanying drawings,

Figure 1 is a view in sectional elevation of l the pattern-cutting element of a machine constructed in accordance with my invention, the driving means therefor, .and the means for supporting itin operativev position on the machine, the section being taken at the 'line 1-1 on Fig. 2 and viewed in the direction of the arrows'. Fig. 2 is a plan "section taken at. the irregular line on Fig. 1 and viewed in the direction of the arrows. Fig. 3 is a section taken at the line 3 3 on Fig. 2 and viewed in the direction of the arrows. Fig. et is a section taken at the line i on Fig. 2 and viewed in the direction of the arrow. Fig. 5 is al view in sectional 'elevation vrof the flexible vconnection between the drive shaft iof the motor einployed and the shaft which actuates the punch element; and Figs. 6,7, andfS are face views of the elements comprising the joint, Figs. 6 and 8 being viewed at the lines 6 and 8 on' Fig. 5 and viewed in the direction '0I the respectivearrows thereof. r

The part of the machine represented at 9 and which is of the yoke-form shown, with its upper legl 10 in the form of a casing, is that part of a pattern-cutting machine which in the machine of the patent hereinbefore referredto, is mounted to have universal movement in a horizontal plane and is caused to move responsive Yto the movement of agpattern-tracer connected therewith through the pantographic. frame' and in a path determined by the contour .of the pattern against which theA vpatterri-tracer moves, this `member 9 being the part which n carries' the'I punch .device for cutting Vvthe 15 providedin the member 10, the rod 13 carrying a sleeve member 16 lscrewed 4upon the threaded Aportion 17 of kthis rod V'and guidingly confined at itsforward edge portion ina guide 18 secured to the frame member 10. At the rear side of the sleeve 18Y is a pin 19 which has journal it in a pitman 20, which has journal connection through the bearings 21 with a pin 22 carried by a shaft 23 and extending eccentric of the aXis of the latter, whereby when the shaft 23 is rotated, the rod 13 and consequently the punch element 12 will be reciprocated. The shaft 23 is supported in a manner adapted to rock it up and down, by a block 24 supported at opposite sides by pivot screws 25 carried by the frame portion 10, and forming trunnions for the block 24, these trunnions extending in a horizontal plane, and the shaft 23 being journaled in this block. The device for driving the shaft 23 is represented at 26 and is shown as an electric motor, which by preference is pivotally sup ported, as indicated at 27, on the frame portion 10. The outer end of the drive shaft 28 of the motor 26 is connected with the adjacent end of the shaft 23, at a point closely adjacent to the rocking bearing 24, by any suitable, flexible, joint, which will permit the motor to drive the shaft 23 in its different positions of adjustment in arvertical direction. The particular connection shown involves a head 29 rigidly secured to the shaft 23 and equipped with a series of pins 30, a head 31 connected with the drive shaft 28 and equipped with pins 32, and a disk 33, preferably of leather, interposed between the opposed faces ofthe sleeves 29 and 31 and containing a series of holes 34 into which the pins 30 and 32 extend, the pins 30 and 32 being preferably spaced apart an equal distance and assembled with the member 33, the number of holes 34 in which, corresponding with the total number of pins 30 and 32, to present a staggered relation of pins.

The shaft 23 is journaled adjacent the end thereof carrying the crank pin 22 in a head 35, which is supported on a bearing member 36 carried on the free end of a spring 37 secured t0 the frame portion 10. The upper end of the block 35 is pivotally connected at 38 with a guide link 39, which is pivotally connected at 40 with the frame portion 10. The block 35 at its forward end is pivotally connected, Aas indicated at 41, with the link 42 of a toggle, the other link 43 of which is pivotally connected with the link 42, as indicated at 44, and pivotally attached to the frame portion 40, as indicated at 45. A link 46 pivotally connects with the toggle at 44 and is pivotally connected with a pin 47 arranged eccentrically on a shaft 48 j ournaled on the frame portion 10. The parts are so proportioned that when the toggle referred to is collapsed by actuating the shaft 48, the spring 37 will operate to hold the punch 12 at such an elevation that in its reciprocations by reason of its connection with the shaft 23, as hereinbefore stated, it will not enter the stationary die member 11, but when the toggle above described is straightened out by operating the shaft 48, the shaft 23 will be rocked in counter-clockwise direction in Fig. 1 tolower the punch element 12 to a Vposition in whiclrit will perform the punching operation 'by coperating with the die member 11.

It will be understood from the foregoing that in the rocking of the shaft 23 to move the punch element 12 into and out of operative relation to the die element 11, the elements of the flexible connection between the shafts 23 and 28 will move relative to each other to compensate forfthe disalinement produced between these shafts and to maintain driving connection, and by supporting the shaft 23 to permit it to rock up and down, the weight of the shaft is not borne by the flexible connection and thus vibration of the shaft 23 is avoided even when this shaft is being driven at'high speed.

In this connection, it may be said that the pivoting of the motor 26 as described, is preferable to rigidly supporting the motor, as the flexible connection thereby is caused to adjust itself more freely and the degree of separation of the elements ofthis connection is less than it would be if the motor lwere rigidly supported.

What I claim as new and desire to secure by Letters Patent is 1. In a machine of the character set forth, the combination of a drive-shaft, a driven shaft, a flexible connection between said shafts, a punch element operated by said driven shaft, means supporting said driven shaft adjacent said punch element and adjustable to position said driven shaft and punch element intov and out of a position in which said punch element performs the punching operation, without arresting operation of said driven shaft, and means between said first-named means and said vflexible connection for supporting said driven shaft and 'permitting the latter to rock. i

2. In a machine of the character set forth, the combination ofv a pivotally supported power device, a driven shaft, a flexible connection between said power device and shaft, a punch element operated by said shaft, means supporting said shaft adjacent said punch element and adjustable to position said shaft and punch element into and out of a position in which said punch element performs the punching operation, without arresting operation of said shaft, and means between said first-named means and said flexible connection for supporting said shaft and permitting the latter to rock. Y

CHARLES E. REED.

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

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