US806890A - Spacing mechanism for punching-machines. - Google Patents

Description

2 SHEETSSHEET l.

PATEN'TED DEC. 12

- S. G. HARVEY.

APPLICATION FILED AUG, 4, 1905.

SPAGING MECHANISM FOR PUNGHING MACHINES.

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PATENTED DEC. 12, 1905.

. S; C. HARVEY. SPACING MECHANISM FOR PUNGHING MACHINES.

APPLICATION FILED AUG.4, 1905.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

SAMUEL C. HARVEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO WIL- LIAMS, WHITE & COMPANY, OF MOLINE, ILLINOIS, A CORPORA- TION OF ILLINOIS.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed August 4, 1905. Serial No 272,760.

To a, whom, it may concern.-

Be it known that I, SAMUEL C. HARVEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Spacing Mechanism for Punching-Machines, of which the following is a specification.

My present invention pertains to improve-- ments in spacing mechanism for punchingmachines and the like, the construction and advantages of which will be hereinafter set forth, reference being had to the annexed drawings.

The object of this invention is to provide a simple mechanism for securing the spacingfeed of the table, the construction being such that a uniform or variable spacing, according to a prearranged pattern, may be automatically secured and the spacing changed as required. With this construction the relative positions of the stop-blocks may be changed or blocks of different lengths substituted therefor, by which means a quick variation in the pattern for feed or spacing is readily obtained.

In the drawings, Figure 1 is a vertical sectional view taken on the line 1 1 of Fig. 3, portions being broken away to more clearly illustrate the construction; Fig. 2, a similar View, the parts occup ing different relative positions; Fig. 3, a si e elevation, the table being shown in section and other portions broken away to more clearly illustrate the construction; Fig. 4, a vertical sectional view on the line 4 4 of Fig. 2, and Fig. 5' a vertical sectional view on the line 5 5 of Fig. 1.

Referring to the drawings, A denotes the punch, B the table carrying the material to be operated upon, and C the feed-shaft for the table, the table being provided with a rack D, which coacts with a pinion E, carried by the shaft C. Motion is imparted to the feed-shaft through the connections hereinafter set forth in detail.

F denotes the main driving-shaft, said shaft being provided with a pinion G at its inner end, which in turn meshes with a gear H, loosely mounted upon the punch-actuating shaft I. The gear H is provided with a clutch member J, which coacts with a slidin clutch member K, splined upon shaft I an 1 thrown into engagement by a treadle L or in any other suitable manner.

Secured to the outer end of the shaft I is a crank-arm M, and pivotally connected to said arm is a rod or pitman N, which in turn is pivotally connected to a pawl-carrier O, swiveled upon the outer end of shaft C. The pawl-carrier is provided at its outer end with a gravitating-pawl P, which coacts with a toothed wheel Q, keyed to the shaft C, so as to move therewith. The parts thus far described are of the usual construction.

A combined pawl-lifter and stop bar or rod is swiveled upon shaft C, said stop-bar comprising an arm R and an elbow-lever S, the arm 'R and lever S being swiveled upon said shaft between the arms of the pawl-carrier O and toothed wheel Q. The arm R and the upwardly-extending arm or lever S are of such a length as to support between their adjacent ends a pawl lifter or finger T near the periphery of the toothed wheel Pivotally connected to the lower arm of the elbowlever S is a jointed rod or stop-bar U, the lower portion of which passes through a fixed guide V and extends in alinement with stopblocks W, which are placed in a channel bar or trough. Said trough is composed of a relatively heavy plate X, a bottom piece or rod Y, and side plate Z, bolts being passed through said plate Z, rod Y, and the lower portion of plate X to secure the parts in position. As will be seen upon reference to Fig. 5, the stop-blocks W fit closely against the plates X and Z and are held in position thereby. Plate X is supported by rollers A, carried by arms B, extending outwardly from suitable pedestals or columns C, secured to the floor of the mill. A rack D is secured to the inner face of the plate X, opposite the trough in which the stop-blocks are mounted, by brackets E and an angle-plate F. The rack stands in direct alinement and coacts with a pawlG, carried at the lower end of an elbow-lever II, fulcrumed at .I upon an extension of the frame of the machine. Connected to the horizontally-disposed arm of elbow-lever H is a spring J,

which serves to draw said armupwardly and to thereby carry the pawl G rearwardly over the teeth of the rack D. A rod K is secured to the free end of the horizontal arm of lever H, said rod extending through guides L,

projecting outwardly from the frame of the machine, and carrying at its upper end a finger M, which, as will be seen upon reference to Fig. 1, stands in the path of travel of a shoulder or projection N, formed upon a collar or sleeve 0, which is splined or keyed to the shaft I. The finger M is held against the collar or sleeve 0 by spring J, and as the projection N comes into contact with said finger the rodv K will be depressed, and consequently the rack and the parts attached thereto-namely, the trough carrying the spacerblockswill be moved forward one step. This operation takes place when the parts are in the positions shown in Fig. 2, at which time the pawl P willhave moved rearwardly or upwardly onto the pawl-lifter T and been drawn out of contact with the teeth of the wheel As the pawlcarrier O is moved rearwardly into this position byrotation of the crank-arm M and the rearward movement of the pitman N said carrier will come into contact with a pin P, carried by the elbow-lever S, to which the pawl-lifter is attached. Consequently the pawl-lifter will move rearwardly with the pawl-carrier to the position shown in Fig. 2. Upon the continued rotation of shaft 4 I, and conse uently of crank-arm M, the

pawl-lifter an pawl-carrier will move downwardly in the direction indicated by the arrow in Fig. 2, these two members traveling together until the lower end of rod U comes into contact with the-stop-block W immediately below the same. The movement of elbow-lever S and the pawl-lifter carried thereby will then cease, and the pawl-carrier will move along independently thereof. Immediately the pawl P rides off the end of the lifter T it will engage the wheel Q and cause a rotation thereof, and inasmuch as said wheel Q is keyed or. made fast to shaft O a feeding movement will be imparted to the table. This movement will continue until the parts reach the positions shown in Fig. 1.

Further movement of'the crank-arm M will serve to withdraw the pawl-oarrier and move the same upwardly, the pawl riding over the inclined faces of the teeth until it is lifted out .of contact therewith by the pawl-lifter T.

It will be seen that the height of the blocks W. determines the extent of downward movement of the arm U, and consequently determines the point at which the pawl P will ride off the lifter and come into engagement with the wheel Q. The greater the downward movement of the rod U the less will be the feeding movement imparted to the table. The shorter the movement of the lifter, and consequently of the rod U, the greater will be the movement of the table by reason of the fact that the pawl P comes into earlier engagement with wheel Q and moves the same to a greater extent than if the movement of rod U were a longer one.

It is to be understood that the punch herein shown is merely illustrative and that the mechanism for securing a variable feed may be applied to any form of punching-machine or the like.

The spacing mechanism herein shown is entirely automatic in its action after the stopblocks W have been placed in position.

Again referring to Fig. 1, it will be noted that the spacing which will take place until the block marked a is reached would be first a short and then a long feed, the blocks in each series being the same in length. Block a, however, is somewhat longer than the short blocks which have preceded it, and consequently the table will be given a slightlyincreased feed. The succeeding long blocks 1), which are all of the same length, will of course efiect the same amount of feed as those which have preceded them; but the blocks 0 and at will effect a slightly-greater feed than block a, while blocks 6 and (1 will effect a slightly-greater feed than block 0. Block 6, however, will give a feed equal to that of block 0 and block f a feed equal to that of block a. From this it will be seen that any desired spacing may be secured, it being necessary only to place a block of the required height in the channel or trough.

From the positions of the parts shown in Fig. 2 it will be noted that the means for advancing the block-carrier comes into operation at a time when the stop-bar or rod is elevated and the pawl P is held out of operative position.

It is entirely conceivable, so far as the broad or generic invention is concerned, that means other than those operated directly by the machine may be employed for advancing the block-carrier. Inasmuch as this would seem to fall within the province of the mechanic, it is not deemed essential to show means by which this can be carried out.

Having thus described my invention,what I claim is 1. In combination with apunchingma chine or the like, a table; mechanism for periodically advancing the same, said mechanseries of blocks serving normally to throw said advancing mechanism into action at fixed intervals according to the dimensions of the blocks.

2. In combination with a punching-machine or the like, a table; means for advancing'said table; a blockcarrier; a series of blocks carried thereby; means for advancing said carrier step by step; and means acting in conjunction with the blocks for throwing the table-advancing means into action, at fixed intervals according to the dimensions of the blocks.

3. In combination with a punching-machine or the like, a block-carrier; a series of blocks carried thereby; means for advancing said carrier step by step; a feed-table mechism being normally held out of action; and a anism for advancing said table, said mechanism being normally held out of action; means coacting with the blocks, for throwing said table-advancing mechanism into action; and connections between said table-advancing mechanism and the power-shaft of the machine for actuating said table-advancing mechanism.

4. In combination with a punching-machine or the like, a block-carrier; a series of blocks carried thereby; a table; table-advancing means coacting with said blocks and controllable by the latter; and means for ad-- vancing the block-carrier when the table-ad vancing means is inactive, substantially as described.

5. In combination with a punching-machine or the like, a block-carrier; a series of blocks carried thereby; a shaft for operating the punches or the like; means coacting with said shaft to advance the block-carrier step by step; a table; and feed mechanism for said table, comprising a toothed wheel, a pawl carrier, a pawl coacting with said wheel, a pawl-lifter, means coacting with the blocks to arrest the movement of said pawllifter, and connections between the punchoperating shaft and the pawl-carrier for operating the latter, substantially as described.

6. In combination with a punching-machine or the like, a series of blocks; means for resenting the same one by one to the tablefeeding mechanism; a table; and means for feeding the table, said means comprising a shaft, connections intermediate said shaft and the table for advancing the latter as the shaft is rotated, a toothed wheel secured to the shaft, a pawl-carrier swiveled upon the shaft, a pawl pivoted upon the pawl-carrier and working in line with the teeth of the toothed wheel, a pawl-lifter working over the wheel and in line with the pawl, a stop bar or rod coacting with said pawl-carrier, said rod standing in alinement with the blocks as they are moved beneath the same, means for moving the pawl-lifter rearwardly with the pawlcarrier, and connections between the pawlcarrier and a movable portion of the machine for actuating said carrier.

7. In combination with a punching-machine or the like, a bloclccarrier; a series of blocks mounted therein; a rack-bar secured to said carrier; a pawl coacting with said rackbar; means to advance the pawl and thereby move the block-carrier; a table; a shaft op eratively connected therewith for advancing the table; a toothed wheel secured upon said shaft; a pawl-carrier swiveled upon the shaft; a pawl carried thereby and normally standing in alinement with the teeth of said wheel; a pawl-lifter; a stop bar or rod connected to the pawl-lifter, said rod standing in line with the blocks and coacting therewith to arrest the movement of the pawl-carrier; a pin extending outwardly from the pawl-lifter in line with the pawl-carrier; a crank-arm secured upon a movable member of the punching-machine; and a pitman connecting said crank-arm with the pawl-carrier.

8. In combination with a punching-machine or the like, a trough or member; means for supporting said member; a series of blocks mounted in said trough; a rack secured to the trough; an elbow-lever pivotally connected to the frame of the machine; a pawl carried by the downwardlyrojecting arm of said elbow-lever, said paw coacting with the rack; means for normally elevating said elbowelever; arod secured to the op-' posite end of said elbow-lever; an operatingshaft for the punches; a sleeve mounted upon said shaft; a projection carried by said sleeve and serving to depress the rod secured to the elbow-lever; a table; a shaft; operative connections between said shaft and the table for advancing the latter as the shaft is rotated; a toothed wheel secured upon said shaft; a pawl-carrier swiveled upon the shaft; a pawl carried thereby in line with the toothed wheel; a crank-arm secured to the punch-operating shaft; a pitman interposed between said crank-arm and the pawl-carrier; a pawl-- lifter; a support for said pawl-lifter, said su port being swiveled upon the shaft for feeding the table; a stop bar or rod pivotally connected to said swiveled support, the lower end of said bar or rod standing in alinement with the blocks carried by the trough; and a pin extending outwardly from the swiveled support for the pawl-lifter into the path of travel of the pawl-carrier, substantially as described.

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

SAMUEL O. HARVEY.

Witnesses:

ALFRED MARSHALL, JAMES L. GoUGH.

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