US874183A

US874183A - Power-punch.

Info

Publication number: US874183A
Authority: US
Inventors: Charles Gordon; Harry Hart
Original assignee: MILWAUKEE HARNESS MACHINERY Co
Current assignee: MILWAUKEE HARNESS MACHINERY Co
Priority date: 1905-03-24
Filing date: 1905-03-24
Publication date: 1907-12-17
Anticipated expiration: 1924-12-17

Description

No. 874,183. PATENTED DEC. 17, 1907 G. GORDON & H. HART.

POWER PUNCH. APPLICATION FILED MAI-1.24. 1905.

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- PATENTED DEC. 17, 1907. G. GORDON & H. HART.

.POWER PUNCH.

APPLICATION FILED 111111.24. 1905.

PATENTE D DEC. 17. 1907.

G. GORDON & H. HART.

POWER PUNCH. APPLIOATION nun mum. 1905.

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:8 I 9 w r 0. GORDON & H. HART. POWER PUNCH.

APPLICATION FILED IAR. 24, 1905.

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PATENTED DEC. 17, 1907.

UNITED STATES PATENT OFFICE.

CHARLES GORDON AND HARRY HART, OF MILWAUKEE, WISCONSIN, ASSIGNORS TO MILWAUKEE HARNESS MACHINERY COMPANY, OF MILWAUKEE, WISCONSIN, A

CORPORATION OF WISCONSIN.

POWER-PUNCH.

Specification of Iietters Patent.

Patented Dec. 17, 1907.

Application filed March 24.,1905. Serial No. 251,763.

To all whom it may concern:

Be it known that we, CHARLES GORDON and HARRY HART, residing in Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Power-Punches, of which the followingis a description, reference being had to the accompanying drawings, which are a part of this specification.

This inventin relates to power punches and especially to power punches designed for punchingleather and the like, and has for its object to improve upon the general construction of such devices.

Another object of this invention is to produce a power punch with its work table adjustable toward or away from the punching mechanism as well as transversely adjustable to the path of movement of the punching mechanism.

Another object of this invention is to improve upon the construction of the punch ing and cutting devices.

Another object of this invention is to provide a means for automatically moving the work to its proper position simultaneously with the starting of the machine in operation.

Another object of this invention 18 to provide suitable adjustable guides of novel construction.

Another object of this invention is to provide a suitably operated blower for keeping the table clear of punchings.

Another object of this invention is to provide a novel form of lubricating journal bearing especially adapted for use with blower fans.

With the above and other objects in view the invention consists in the device, its arts and combinations of parts as herein set orth and their equivalents.

Referring to the accompanying drawings in which like characters of reference indicate the same parts in the several views Figure 1 is a front elevation of a power punch embodying this invention; Fig. 2 is a side elevation thereof with parts broken away; Fig. 3 is a sectional elevation of the punch proper the punching table and. their associated parts; Fig. 4 isa sectional plan view taken on the plane of line 4- 4 of Fig. 3; Fig. 5 is a sectional elevation of an end cutting tool as employed with the poner punch of this invention; Fig. 6 is a front elevation of a punching tool also employed therewith; Fig. 7 is a longitudinal sectional view thereof on the line 7 -7 of Fig. 6; Fig. 8 is a transverse sectional plan view thereof on the line 88 of Fig. 7; Fig. 9 is .a vertical sectional view of the blower fan; Fig. 10 is a verticalsectional view of one 'ournal bearing thereof, on the line 10-10 of Fi 9; and, Fig. 11 is a plan view of the slotted wick plug shown in ig. 9. 1

In these drawings 15 represents a standard or supporting base to which is secured a head frame 16 having j ourn'aled in its upper part a crank shaft 17 carrying a loose pulley 158 which is adapted to be clutched thereto by a suitable clutch mechanism 19 and is driven by a belt 20 from a pulley 21 mounted on a suitable countershaft 22. The counter shaft 22 is journaled in bearings 23 of the standard or support 15 at right angles to the vertical plane of the crank shaft :17 and is provided with a driving pulley 24 which is adapted to be driven by any suitable source of power to cause the operation of the countershaft 22. The-loose pulley 18 is driven from the counter shaft 22 through the belting comiection 20, and the clutch 19 is adapted to cause the crank shaft 17-to partake of its motion when a suitable treadle 25 is o wratrd. The treadle 25 is pivoted to an upright post 26 at the rear of the machine base and extends through openings in the standard 15, receiving an upward spring pressure from a coil sprin which it moves, and being connected to the clutch mechanism 19 by means of :1. connecting rod 29.

The crank shaft 17 carries a crank 30 at its front end which fits within a sliding block 31 having a horizontal sliding movement in a ram which has a vertically sliding movcment in a guideway of the head frame It}. A punch holder in the form of a bar 33 1S 'iirinly secured to the rain 32 by having'a top 27 surrounding a split stud 28 through more punch blocks 41-with dove tailed slots therefor.

tailed flange 40 with the front undercut deeper than the other and upon which are adapted to be adjustably clamped one or 42 in their upper ends to receive the dove tailed flange 40. The upwardly extending front flange of the dove tailed slot 42 has a set screw 43 threaded therethrough to bear upon the front edge of the dove tailed flange 40 and s curely clamp the punch block 41 to the unc holder 35.

T e punch block 41 has a circular boss 44 on its bottom which has a central screw threaded bore into which is threaded a tubu lar punch 45; The boss 44 is partially severed from the punch block 41 by a slot 46 extending half way around it between the boss and the punch block, a vertical slot 47 serving to split the boss at one end of the slot 46 so that when a clamping ring 48 'is fitted around the boss and the clamping screw 49 thereof is' tightened the boss 44 is clamped tightly upon the tubular punch 45 to revent its working loose. The punch bloc 41 has an inclined discharge opening 507t0 lead the punchings away from the upper end of the tubular punch 45. The clamping ring 48 has a screw 51 threaded therein securing in placea coil spring 52 which surrounds the tubular punch 45 and serves as a stripper At one end of the punchholder 41, as here shown, acutter block 53 is clamped to the dove tailed flange 40 by parts identical with those of the punch block 41, andthis cutter block consists principally of a cylindrical boss or body which is threaded at its upper portion and is unthreaded at its lower portion and has a knurled nut '54 threaded on the thre'aded portion thereof and a cylindrical base ring 55 of a semi-cylindrical cutter blade 56 fitting around the unthreaded portion and bearing on the knurled nut 54. A disk 57 is fitted upon an annular shoulder of the cylindrical base and has a set screw '58 passing therethrough and threading into the body portion of the cutter-block 53 to clamp the cutter against the nut 54. The cutter may be adjusted to raise or lower its cutting edge by first adjusting the nut 54 upon the cutter block and then tightening the set screw 54 until the cutter is properly clamped in position.

Beneath the punches and to the front face of the head frame 16 is vertically adjustably clamped a bracket table 59 by means of bolts 60 passing through vertical slots 61 in the vertical portion of the bracket table and through the front face of the head frame 16 with large hand nuts 62 threaded on their ends. Adjusting screws 63 are threaded through forwardly extending bosses 64 at the upper end of the standard or base 15 and bear uplon lugs 65 0f the bracket table so that w en the bolts 60 are loosened by loosening and is adjustably secured thereto by having bolts with winged nuts 68 assing through transverse slots 69 in the cm s of the plate 67' and also through longitudinal slots 70 in the ends of the bracket table 59, which arrangement permits of adjustment of the plate 67 i on the bracket table 59 in any direction and of securely clamping it in any position to which it may be adjusted. The plate 67 has an upwardly extending flange 71 along its front edge and its rear edge is curved to avoid striking the head frame 16 during the adjustments thereof.

jecting lugs 72 through which are threaded clamping screws 73 bearing u on a follower plate 74 which is adapted to 0 amp between Near the ends of its rear edge it is provided with upwardly proit and the flange 71 a number of strips of wood 75 or other soft material which will form a suitable bed or support for the work that will not dull the edges of the cutting tools.

A shelf 76 has a depending flange 77 near its rear edge which is clamped to the flange 1 71 by screws 78 and the shelfportion overhangs said flange 71 to make said shelf portion practically a continuation of the upper surface of the strips 7 5, the flange 7 7 being provided with a web 79 connecting it with the under side of the shelf 76 to strengthen the construction.

The head frame 16 has a boss 80 projecting into the open space 81 thereof, through which boss is rotatably fitted a plug 82 having an annular flange 83 countersunk in the front face of the head frame and a knurled nut 84 threaded up to a shoulder on its other end to constitute a means for turning the plug 82 in the boss. A tubular stem 85 slidably and rotatably fits through the plug 82 longitudinally thereof and eccentric therewith so that as the plug 82 is rotated in its bearing in the head frame the tubular stem 85 will be raised or lowered with relation to the punching table. In the rear end of the tubular stem 85 is threaded a set screw 86 which bears against a pin 87 extending through the stem, forcing it to press against a gage rail 88 whieh'has a dove tailed rib on its back extending lengthwise thereof and fitting in a correspondingly shaped slot in a head on the end of the stem 85.

the set'screw 86 is loose, but is locked inits V The gage rail is slidably adjustable on the stem 85 by means of this dove tailed connection whenadjustments by the pressure of the pin 87 thereon when the set screw is tightened. The stem 85 may be moved in the plug 82 toward or away from the punching and cutting tools to the desired extent, which may be determined by a series of graduations 89 thereon showing beyond said plug, and then the stem may be bound in this position by tightening a clamping screw 90 which is threaded through the side of the boss 80 and passes through a slot 91 in the plug 82 and bears against the stem 85 so as to bind the stem and plug against movement.

When it is desired to adjust the gage rail 88 nearer to or farther from the punching and cutting tools it is only necessary to loosen the clamping screw 90 and slide the tubular stem 85 within the plug 82 to the desired position; and when a. vertical adjustment of the gage rail 88 is desired this may be accomplished by turning the plug 82 by means of its knurled nut 84 so as to cause the tubular stem 85 which is eccentric therewith to raise or lower the gage rail and when the desired position of the gage rail is reached the tightening of the clamping screw 90 not only prevents the tubular stem from sliding in the plug 82, but also prevents said plug from turning in its bearing, the tubular stem and the plug being clamped between the bearing for the plug and the clamping screw 90.

In order that the gage rail 88 which limits the position of the material to be punched laterally of the punching and, cutting mechanism may be supplemented by a means for limiting the position of the material longitudinally of the row of punching and cutting mechanisms, a gage rod 92 is provided which is of a U-shape with one arm considerably longer than the other and passedthrough registering openings in the pair of webs 66 of the bracket table. Except when clamped by a set screw 93 threaded in one of said webs and bearing thereon said gage rod 92 is free to slide in these openings so as to bring its shorter end, which extends around the end ofthe punch table, nearer to or farther from the end cutting tool 56 and thereby form a stop against which the material to be punched may strike to determine the position of said material for the punching and cutting operation, said short arm of the gage rod resting upon the punch strips 75, preferably in alinement with the punching'and cutting mechanism. i

It is desirable that a means should be provided for assuring the material to be punched being moved all the way up to the guide rail 88 before the punching and cutting operation, and to this end there is provided a rocker arm 94 to be operated by the depres sion of the treadle 25 and which carries a gage finger adapted to move toward the work as the machine is started in operation.

The rocker arm 94, is rigidly mounted on shaft 95 which is ournaled through the two webs 66 of the bracket table 59 and' is provided near one end with a shouldered member 96 rigidly keyed thereto and which is adapted to engage with a shouldered hub 97 of a crank arm 98 on the shaft, connected by means of a connecting rod 99 to the front portion of the treadle 25. A sleeve. 100 which is also rigidly'keyed to the shaft 95 has a coiled spring 101 fixed to it at one end,- the other end of said spring being connected to the crank arm 98, so that the tendency of said spring is to cause the shoulders of the hub 97 and the shouldered member 96 to remain in engagement, but permitting the crank arm 98 to continue moving to separate the shoulder of its hub from the shoulder of the shouldered member 96 when the rocker arm 94 is stopped in its movement from any cause before the treadle'25 has completed its movement. To adjustably limit the degree of movement of the rocker arm 95 a set screw 102 is threaded through said rocker arm to strike against the front end of the horizontal portion of bracket table 95 and is provided with a jam nut 103 to lock it in its adjustments.

The upper end of the rocker arm 94 forms a socket through which a stem 104 is ad justably slidable and is bound in its adjustments by means of a set screw 105 threaded through said socket end of the rocker arm. The inner end of the stem 104 carries a pivoted finger 106 which rests upon the shelf 76 and when the rocker arm 94 is swung by means of the operation of the treadle 25 said finger 106 is adapted to slide upon the shelf 78 and the punch table strips 75 moving the material toward the gage rail 88 until the rocker arm 94 is stopped by the engagement of the set screw 102 with the bracket table 59; When the treadle 25 is released the crank arm 98 is swung upwardly until the shoulders of the hub 97 and the shouldered member 96 are engaged, when the rocker arm 94 is caused to swing therewith to its normal position as shown in Fig. 3.

The punchings which are ejected from the tubular punches 45 become objectionable when no means is provided for removing them and one of the objects of this invention is to automatically clear the punching table of these punchings at all times. This is accom lished by means of a blower secured to the standard orbase 15 discharging air through a discharge pipe onto the punching 109 forming an extension of the bracket 107 The bracket 107 and its extension bracket 109 are provided with sockets 110 into which fit bosses 111 of pivoted journal bearings 112, the bosses 1 1 1 bearing against suitable washers 113 in the sockets 110 and being clamped in position by means of clamping screws 114. By means of the washers 113 the journal bearings 112 may be alined so that they both lie in the same vertical plane and the mounting of the journal hearings in the sockets 110 is such that their pivotal movement enables them to'automatically register in perfectalinement when a shaft 115 is journaled therein.-

Each end of the shaft 115 is slightly reduced to fit within the journal bearings 112 and at the reduction in its diameter it is provided with an annular groove 116 and an annular flange 117 between the groove and the reduced portion of the shaft the flange 117 rotating in an internal annular groove 118 in the bore of the journal bearing which groove communicates by means of'a passageway 119 with an oil pocket 120 beneath the bearing 112. At the other end of the journal bearing 112 is another passa eway 121 leading to the bore of the journal earing through which a wick 122 passes from the lower end of the oil pocket 120 to a slot 123 of a slotted lug 124 which fits in the bore of the ournal hearing and is held against the end of the shaft 115 to take the end thrust thereof by means of a shouldered screw 125 threaded in said bore of the journal bearing. The wick 122 continues from said'slot 123 through a smaller bore'126 of the journal bearing ex-' tending along the main bore thereof to the annular groove 118 and partiall co-inciding with the main bore, so that t e wick 122 practically rests upon'the reduced portion of the shaft 115. A screw lug 127 is threaded in the lower end of the oi pocket 120 throu h which the contents :of the oil pocket may be drained for cleaningand a perforation 128 near the upper portion of the oil pocket serves as an 1nlet opening through which oil may be inserted in-the oil pocket.

The operation of the lubricating means for the journal bearing 112 above described is that the oil inthe pocket 120 is conveyed by means of the wick 122 through the passage way 121 and the slot 123 of plug 124 to the small bore- 126 where said wick extends the full length of the bearing ortion bf the shaft 115 in contact with the s aft and supplying it with oil, the surplus oil in the bearing be ing thrown by the centrifugal action of'the annular flange 117 into the ann lar groove 1 18 from which it is returned to the oil pocket 'by means of the passageway 119.

- A suitable blower fan 129 is mounted on' theshaft 115 between the journal bearings and within the fan casing 108 and a driving pulley 130 is also mounted on said shaft 115 .is adjuste between the journal bearings 112 but outside of the casing, the bracket 107 being recessed at 131 to accommodate it. .A drlving belt 132 connects the driving pulley 130 with a large pulley 133 on the countershaft 22 so that the fan wheel 129 will be driven thereby at a highspeed. The mouth of the fan casing 108 has connected to it a telescopically adjustable discharge spout 134 which is bent to first extend at right angles to its main portion and then terminate in an inclined flattened discharge nozzle 135 directing the blast of air along the line of unching and cutting tools so as to effective y remove all punchings and scraps left upon the punching table by the cutting and punching tools.

As the description of each of the several parts of the invention has been accompanied y a statement of its operation and function to make clear its construction and relation to the other parts, a further statement of the operation of the machine need be only general. Therefore briefly resuming, the operation of the machine as herein described 1s as follows. The driving pulley 24 being belted to a suitable source of power and causing the rotation of the countershaft 22' drives the loose pulley 18 on the crank shaft 17 through the belt 20 and the blower fan 129 throu h the belt 132. The clutch 19 being norma y out of connection, the punching apparatus proper remains inactive until the treadle 25 1s depressed. Previous to this, however, the proper adjustments are to be made, first, of the punching table 139 with 11318131011110 the punching mechanism by a vertical'adjustment thereof through set screws 63. Then the bed of wooden stri s 75 is to be adjusted horizontally in any 'rection by loosening the thumb bolts 68 to present a new surface of the wooden strips 75 to the unching and vcutting mechanism if the mac ine has previouslybeen in operation. The gages are to be adjusted by turning the knurled nut 84 when the clam ing screw 90 is loose so as to raise or lower t e tubular stem 85 and cause the gage:rail 88 to rest upon the top of the bed of wooden strips 75 or wherever de'sired.

Its adjustment toward or away from the' punching and cutting mechanism is accomthrough the plug 82 and in its adjusted positions, both vertical and horizontal it is secured against accidental movement by the tightening of the clamping screw 90. The (glage finger 106 has its forward movement etermi-ned by the position of-the set screw 'plished by sliding the tubular stem 85 i 102 so that it will stop at a distance from the ga e rail 88 equal to the width of the materia to be eiperated upon, and the gage rod 92 screw 92 and sliding it to t e position desired with relation to the end cutting tool 56 and again tightening the screw 93 so that the matenal when fed along thewooden strips in its bearings b loosening the 75 until stopped by the gage rod will be in the proper position to receive the punching and cutting operation without a waste of the material. Now, when the material is placed on the punching bed and the treadle, 25 is pressed by the foot of the operator the connecting rod 99 causes the gage finger 106 to slide acrossthe table and press the material to be punched against the gage rail 88 while simultaneously the connecting rod 29 operates the clutch 19 and causes the pulley 18 to rotate the crank shaft 17 and produce an operation of the punchin and cutting mechanism, the block 30 sh ing horizontally in the ram 32 and the ram sliding vertically in its guideways of the head frame. Preferably the clutch 19 is of such a nature that it permits of but a single operation of the punchin r and cutting mechanism and then automatlcally disengages the ulley 18 from the crank shaft 17 until anot or de ression of the treadle 25, so that the materia having received its punching and cutting operation may be removed at will having received a perforation from each tubular punch 45 and a rounded endcut by the semi-cylindrical cutter blade 56, the arrangement of the unching and cutting tools as here shown eing that usually employed for cutting and punching buckle strap ends for harness and the like though other arrangements of these tools for other urposes may be adopted at will. The punc fiings dropped b the several punches and the waste materia left by the end cutter will be immediately removed by the operation of the blast from the blower which is ke t in constant motion for that purpose and therefore the followin operations ofthe machine will not be hindered by the presence of such punchings or waste material on the punchin table.

While a particular em odiment of this invention has been shown and described for the purpose of illustratin this invention it is not to be understood therefrom that the invention is confined solely to such details of construction and arrangement of parts, but that various chan es and alterations and substitutions may e made without departing from the spirit and scope of this invenion.

The object in locating the wick 122 above the shaft 115 is to avoid reducing the bearing surface of the bearin 112 since the belt 132 by which the said s aft is driven ulls downwardly thereon and to lace the ore 126 for the wick beneath the s aft 1 15 would cut away a portion of the bearing surface of the bearing and cause rapid wear.

What we claim as our invention is,

1. In combination, a frame, a punching mechanism thereon, a table on the frame, 'a

punch bed adjustably mounted on the table,

a flange on one side of the punch bed, clampthe punch bed, and .strips of soft material clamped on the punch bed between the clamping screws and the flange thereof for receiving the material to be punched.

2. .1.11 combination, a frame, a punching mechanism thereon, a table carried by the frame, a punch bed adjustably mounted on the table, a flange on the punch bed, a clamping screw on the punch bed, a series of strips of soft material clamped to the punch bed between the clamping screw and the flange thereof, and a shelf secured to the flange of the punch bed at approximately the level of the-surface of the strips of soft material.

3. In combination, a frame, a table thereon, a punching mechanism on the frame above the table, a punch bed mounted on the table, bolts connecting the punch bed with the table and passing through slots therein at an angle to each other so that the punch bed may be adjustably clamped thereby to the justed and clamped to the table, a flange on the punch bed, a clamp screw on the punch bed, a number'of strips of wood clamped to g the punch bed between the clamp screw and the flange, and a shelf secured to the flange with its top plate overhanging the said flange and standing approximately in a plane with the top surface of the stri s of wood.

5. In combination, a 'rame, a punching mechanism thereon, a punching table on the frame, a plug rotatably. mounted in the frame, a stem carried by the plug eccentric thereto, a gage carried by the stem, and means for holding the plug in its adjusted positions.

6. In combination, a frame, a punching mechanism thereon, a punching table on the frame, a plug rotatably mounted in the frame and having means for turning it, a stem carried by the plug eccentric thereto, a gage rail carried by-the stem, and a screw threaded through the frame and adapted to press the plug against its seat to lock the plug in its adjustments. A

7. In combination, a frame, a punching mechanism thereon, a table carried by the frame, a plu rotatably mounted in .the frame. a tubu ar stem slidable in the lug and eccentric thereto, a gage rail slidab e in the tubular stem, a screw threaded in the tubular stem and adapted to bind the gage 8. In combination, a frame, a punching mechanism thereon, a table on the frame, a

- plug rotatably mounted in the frame, a stem to, a gage rail carried by the tubular stem, a

screw threaded in the tubular stem, a pin located in the tubular stem and adapted to be forced .by the screw against the gage rail to prevent said gage rail moving on the tubular stem, and a clamping screw threaded through the frame and passing through a slot in the plug to bear upon the tubular stem and so bind the plugand the tubular stem tov prevent their moving out of adjustment.

-10. In combination, a frame, a unching mechanism thereon, a bracket tabfe carried by the frame, webs on the bracket table, a U-shapedgage rod having a long arm slidable in openings through the webs and extending around the end of the bracket table with its shorter arm resting upon the bracket table and adapted to be moved toward or away from the path of the punching mechanism by sliding the longer arm through the oted to the. stem and adapte fixed member on the sha one end fixed to the shaft and openings in the webs, and a set screw threaded in one of the Webs to lock the gage rod in its adjustments.

11. In combination, a frame, a punching I mechanism thereon, an adjustable bracket table carried by the frame, a shaft journaled in the bracket table, a rocker arm mounted on the shaft, a gage finger pivotally mounted on the rocker arm and resting on the bracket table, and means for oscillating the shaft to cause the rocker arm to swing and bring the age finger against the material to be punc ed.

12. In combination, a' frame, a punching mechanism thereon, a table carried by the frame, a shaft journaled in the table, a rocker arm carried by the shaft, a stem adjustable on the rocker arm, a age finger-piv- (I to rest on the table, and adjustable means for limitin the movement of the rocker arm, a shoul ered ft, a' shouldered loose member 'on the shaft, a spring having pressing against the loose member to cause said memher to press its shoulder against the shoulder of the shouldered fixed member, an arm on the loose member, a treadle for roducing the operation of the punching mec anism, and a connecting rod connecting the arm with the treadle;

13. In combination, a frame, a punching naled between the Webs, a rocker arm on the shaft, a stem adjustable on the rocker arm, a gage finger pivoted to the stem and bearing on the table, a set'screw threaded through the rocker arm and adapted to engage the table to limit the movement of the rocker arm, a jam nut on the set screw to lock the set screwiii its adjustments, a shouldered fixed member on the shaft, a shouldered loose member on the shaft, a fixed sleeve on the shaft, a coil spring having one end secured to the fixed sleeve and the other end bearing against the loose member and adapted to hold the shoulder of the loose member against the shoulder of the fixed member, a

crank arm on the loose member, a treadle for producing the operation of the punching mechanism, and a connecting rod connecting the crank arm with the treadle;

14L. In combination, a tool block, a boss formed thereon and connected therewith on one side but disconnected therefrom on the other side, said boss being split and having a threaded bore, a punch threaded in the bore of the boss, and a clampfor clamping the boss against the punch.

15. In combination,'a punch block, a split boss formed thereon and partially separated from the punch block by a slot between the boss and the punch block, a punch threaded in the boss, and a clam ring surrounding the amp the boss against punchln s communicating with the bore of the tubu ar punch, a clamping ring surrounding the boss, and a screw threaded "through the clampin ring and bearin on the boss adapted to 0 amp the boss against the tubular punch.

17. In combination, a punch block, a split boss formed thereon, and partially separated therefrom by means of a slit between the boss and the punch block, the split of the boss being located at one end of the slit, a

tubular punch threaded in the boss, an in- .clined passageway through the punch block' registering with the bore of the tubular punch, a clam ing ring surrounding the'boss,

and a screw t readed through the clamping ring and bearing on the boss opposite the slit thereof and adapted to clamp the boss around the tubular punch.

18. In combination, a punch block, a split boss formed thereon partiall se arated there- 1 from by a slit between t e oss and ,the punch block, a punch threaded in the boss, a

clamping ring surrounding the boss, a screw threaded therethrough and adapted to clamp the boss on the punch, and a coiled spring stripper secured to the clamping ring and surrounding the punch. j j

19. In combination, a punch block, a split boss thereon partially separated therefrom b a slit between the boss and the unch bfiwk, a punch thread ed in the boss, a 0 amping rin surrounding the boss, a screw threaded therethrough and adapted to clamp the boss around the punch, a second screw threaded in the clamping ring, and a coiled spring stripper secured to the clamping ring thereb i 20. In combination, a toolblo'ck, a thread-', ed boss thereon, a nut threaded on the boss, a cutting tool having a cylindrical base fitting the boss, a-disk having-a shouldered seat in said cylindrical base, and a screw passed through the disk and threading intothe boss. I

21. In com'blnatlon, a tool block, a threaded boss thereon, a nut threaded, on the boss, a semi-cylindrical cuttin toolhaving a cylindrical base fitting onthe oss and bearing on the nut, a disk having an annular shouldered seat in said cylindrlca'l base, and a screw passed through the disk and threaded into the boss whereby the cuttingtool may be clamped in adjusted positions on the tool block.

, v22. In combination, a-punching mechane ism having a suitable supporting frame, a

bracket on said frame, a fan casin mounted roundin the blower fan and adapted to discharget e air at the punchin mechanism.

' 24. In combination, a punc ing mechanism provided with a suitable supporting frame, a pair-of journal bearings having pivotal support from the frame by'means of bosses thereon pivotally mounted in sockets in members secured to the frame and havin adjusting screws clamping themin sai sockets, a blower fan journaled in'the journal bearings, and a casing surrounding the blower fan and adapted to discharge air at thepunching mechanism. 7

In testimony whereof, we afEx our signatures, in presence of two witnesses. Q

' CHARLES GORDON.-

- HARRY HART.

Witnesses-z v R. S. O. CALDWELL,

ANNA F. ,SOH'MIDTBAUER.