US1678319A - Punching die - Google Patents

Description

July 24, leza- 1,678,319 J. G. BLEvsslNG UNcHING DIE `Fi1a 1925 :s sheets-sheet 1 f7 JJ mmm July 24, 1928. 1,678,319

J. G. BLEsslNG PUNCHING DI E Filed Ja 14, 192 3 Sheets-Sheet 2 I 4f 44 il July 24, 1928. 1,678,319

J. G. BLEsslNG PUNCHING DIE lFiled Jan. 14, 1925 3 Sheets-Sheet 5 IFITS' i STE Patented July 24, 1928.

i UNITED g STATI-:s

JOHN e. ,nLEssIN or OAK ronnsT, rLLrNoIs, assieme, BY MnsNE Assiem-` mnNTs, To AUTOMATIC ELECTRIC INC.,

, DELAWARE.

OF CHICAGO, ILLINOIS, A CORPORATION OF PUNGHING nin.y

`Application led January The present invention relates in general to dies, but is concerned particularly with what are commonly known as punching or piercing dies.

One object of the invention lies in the design and Vconstruction of a die of this character' which, with the same cutting member, can be actuated to cut orfpierce diilierentsized openingsk in a piece of material, the size of the opening being dependent on the number ottimes the die is operated. This object is accomplished Vin the present disclosure vby causing the materialV being punched to be automatically moved a definite distance following each cutting operation.

Another feature lies in' the jprovisionof means for moving the material variable predetermined distances independent of the cuttingmechanism by operating the die in a distinctive manner, either once or a plurality of times, depending upon the space between the openings required, and for then again operating the die to punch ork cut another opening in the material. n

In order to enable a clear description of the invention to be made the same has been illustrated in the accompanying` drawings in the form of a die for cutting notches in disks used in impulse transmitting devices, such as illustrated in the co-pending application of Blessing, Serial No. 743,659, tiled October 15, 1924.

The drawings comprising Figs. 1-4, inclusive, and 7^, show various views of the die, while Figs. 5 and 6 show a blank, before and after it has been cut'. y

Fig. 1 is a top view of the die; Fig.` 2 is a side view; Fig. 3 is a bottom view; Fig. 4 is a view. partly in cross section, taken on line 4 4 of Fig. 3; and Fig. 7 is a top view ot a portion of the die with screw 25 removed and handle 5 thrown back so that both cutting elements of the die may be clearly seen. j

` The die, in brief, consists of a mounting plate 1; a turntable 8; die elements 35'and 7, the element 7 being attached to a hinged arm 5; and associated mechanism for rotating the turn-table, carrying the object being cut, a definite distance following each cutting operation. f

The construction and operation in detail is as follows:

Referring now particularly to Figs. 2, 3

14, 1925. serial no. 2,250.

and v4', ay mounting `plate 1 has attached to it tour legs 2, 2'., 48 and 48. These. legs are secured in openings inthe mounting plate 1' in thermanner shown in Fig. 4, or maybe sebetween the posts 18 and v18 as clearly shown in Figs. 1 and 7.

' The. upper cutting element 7 of the die is fitted in a hole in the handle 5 and is held in its fixed position by a key 16 extending through the handle and through a portion of E the cuttingmember.' Secured to the plate 1 immediately under cutting member 7 is a spacer plate 26, and on this plate is positioned acase hardened plate 35 comprising the lower 'elementof the die. These plates gand 35m-e held in place by screws 15 and Y A turn-table 8, shown in Figs.v 1, 2 and 7, is provided with a `downwardly extending shaft, which extends through an opening in the plate'l. The topv oi' `the turn-table 8 'lies in a plane 'Hush with the top of die element 35.

As will beevident from observation of Figs. 5"and 6, the disks to be cut or perforated are provided with an opening in their center, as well as a slot 50 and a perforation y51. The turn-table 8 has` accordingly been provided with upwardly extending projections79,x10 and 34, which render the incorrect.

ypositioning of thedisk on the turn-table impossible, and'also vprevents the disk being turned independent of the turn-table. In "order to guard againstthe possibility of the disky tipping while it is being cut a spring inembery, ixedto the under side of the handle`5,`has its tree end resting against the disk at a point verynear where it is being perforated. The upward movement ofthe `handle jis limited by the screw 25, and the simple operation is indicated by a notch 52y in the disk shown in Fig. 6.

The foregoing description covers only so much of the construction of the die as is essential to enable a single .perforation to be made in a blank disk. The various mechanisms required to cause the disk tokbe rotated automatically following each cutting operation will now be described.

On the under side of plate 1, secured to the shaft 39 of turn-table 8, is a. ratchet wheel 11, which is held in fixed relation to shaft 39 by a key 27.

The Ylegs 2 and 2 are slotted for a distance, as shown in Figs. 2 and 4, and in these openings is carried a horizontal bar 37, which is held in placefby screws 31 and 31 through the medium of rollers 3yfand 3. Riveted to the bar 37 is a post 47 provided with a pawl 42, which, as shown inkFig. 3, normally engages a tooth of the ratchet wheel 11.

A spring 12, having one end secured .to leg 2 and the other end secured by means of member 38 to the horizontal bar 37, normally holds this bar in the position shown in Fig. 3.

As previously mentioned, the spring 45 in the sleeve 24, which acts as a guide for arm 5, normally holds the handle 5 at its extreme uppermost position. This spring also holds the pin 44 in engagement with the handle 5.

Mounted on the horizontal bar 37 by means of screw 46 is a roller 40. This roller is in the path of pin 44 so that when the handle 5 is operated pin 44, on its downward movement, engages roller 40 causing the horizontal bar 37 to be shifted in the direction indicated by the arrow. The movement of the horizontal bar 37 is just sufficient tol allow the pawl 42 tov slide over one tooth of the ratchet wheel 11. When the handle 5 is released it and the pin 44 are restored to their uppermost position by spring 45. As the pin 44 moves out of the path of roller 40, spring 12 becomes effec? tive to restore the horizontal bar 37 to its pawl 42 rotates the ratchet wheel 11 andthe turn-table 8 one step. As soon as the ratchet wheel 11 has rotated one step pawl f 41 engages the next ratchet tooth to hold the wheel 11 in its advanced position. n

Tn order to positively guard against any slight movement of the wheel'11 while the punching operation is actually taking place, an additional pawl 36 is provided. This pawl'is mounted on a spring member 4 to a plate 32, and which, in turn, is secured to mounting plate 1 by screws 36 and 36. A bracket 23, attached to the end of bar 37, is also connected with the spring member 4 by means of screw 21 so that any movement of horizontal bar 37 is transmitted .to the holding pawl 36, which is effective to firmly hold ythe wheel 11 in its proper position when thedie is being operated. The spring member 4 is so tensioned that it assists the spring 12.v

n rom the foregoing ,description it will be appreciated that, each time the handle is operated downward into engagement with the adjusting screw 13 and then ypermitted to restore, the turn-table 8 will .bewrotated through the medium of pawl 42and wheel 11 for the distance' corresponding to the widthY of onetooth ofthe ratchet wheel. The distance of movement orrotation and the size of the cut made by the die is such that there is substantially vno-lap or space betweenjtwo consecutiver cuts. As a result the size of the notch desiredis merely de` termined by ther` number of times the die is operated. F ig'. 6 y'shows a. disk having a notch 52, which is' the result of a single 0peration of the die, a notch 53` which Vis the result of five operations of the die, while the other notches shown are results of avjstill larger number of opei'ations.

The next feature to be explained has to do with the means whereby thediskma-y be rotated deiinte ditances, independent of the perforating mechanism This operation may be accomplished in either of two ways. The pawl k42 may. be so adjusted that it drops in the next tooth justA as the die member 7 engagesthe disk, so that by operating the die 'to this point and releasing thehandlethe wheel r1l' and turntable are turned." The other method of rotating the table' 8 is by seizing the bracket 23 andl directly operating the horizontal bar 37 as many'ti'mes as required torotate `the wheel 11 the desired distance.

r'Iny certain instances it may provel advantageous to be able to .rotate the turn-table quite adistanee. l This maybe .done by depressingl the handle 5 just v'suiiicient to permit pawl .42fto slide-over the teeth of. ratchet wheel 11 without engagingsleeve 24. The wheel 11 mayl then be rotated as far as is n .desired in the'direction of the arrow. initial position, and through the medium of It will be noted that the top side of wheel ,.11 is slightly. pitched downward from its axis. This provision is made so .thatihe punchings which drop through plates 35, 26.

and lonto wheel 11'r slide to the edge thereof and drop ofi".

Vhat is claimed is: A n

f 1. In a cutting` die, a turntable, a cutting member, a .manually operable operating member.- forr moving said cutting member from anormal to an alternate position and which is secured to post 2O which is securedI for positively locking said turn-table against `ion rotation in either direction, means icr restoring said operating member following its operation, and means controlled by the operation and restoration ot said operating member igor moving said turn-table.

2. In a die, a turntable, aeutting mem-V 3. In a die, a manually operable ope y'ating member, a cutting member iiXed to said op-v erating member, a turn-table providing a support for the object to be cut by said cutting member, devices on said turntable rege istering with perfo ations in the object to be cut to hold it in fixed relation to the turntable, and mechanism rendered ei'ect-ive by the operaticn and restoration of said operating member to move said turntable.

4. In combination with a cutting die and hand operated means for operating said die, a turn-table, and mechanism operated by said hand operate-d means for automatically turning said table a definite distance following each operation oi said means, said meehanism also operable for turning said turn table any desired extent independent ot said means.

5.` In a hand operated cutting or perforating die, a turn-table serving `as a support for material to be cut, a pawl and ratchet device tor turning said table, .a hand lever pivoted at one end carrying a cutting member, mechanism rendered operative responsive te the manual operation and restoration of said lever for transmitting motion to said pawl and ratchet mechanism, and a second pawl cooperative with the ratchet ot the first mechanism preventing retrograde movement ofthe turnftable.

6. In combination, a tool 'for peri'orating thin material, having 1Key and rictional ele ments for maintaining the material in place together with means tor re-positioning said material in the path of the cutting element of said tool followingv each cutting operation.

7. In a cutting die, a cutting member', a turn-table, mechanism operable from a normal to .an alternate position to cause said cutting'men'iber to perform a cutting operation and upon its return tc rotate said turntable, and alternatively operable `from normal to an intermediate position and back to rotate the turn-table only. v

8. In a cutting die., a turn-table for supporting work to be cut, a rcutting member,

manually controlled interacting mechanismv for causing the turn-table to rotate either beore or after a cutting operation has taken place and for regulating the distance of rotation of the turn-table between cutting operations at will.

9. In a cutting die, a cutting member, a`

turn-table, means controlled by said cutting member for rotating said table in one direction, means for preventing its rotation in the other direction, and means ope able upon the operation of said cutting member for kat times locking it against rotation in either direction.

10. In a cutting die, a cutting member, a turn-table, means controlled by said cutting member for rotating said table in one direction, means for preventing its rotation in the other direction, means operable upon the operation of said cutting member for at timesl locking it against rotation in either direction, and means for causing saidfcutting member to perform a cutting operation only while said last means is effective.

1I. In a cutting die, a normally operated handle with a cutting member .attac-hed thereto, a pin normally held under spring tension against said handle, a spring tensioned shifting bar having a roller attached thereto in operative relation to said pin, an operating pawl attached to said bar normally engaging a tooth on the periphery of a turntable containing material to be cutmeans for moving said handle from a normal position to press said pin into engage-` and to move said pin out of engagement of.

said roller, :said bar movingsaid operating pawl to engage the next tooth on .said wheel 'and under action of said shifting bar tensioning spring rotate said turntable.

12. In a cutting die, a manually operated handle with a cutting member attached thereto,A a turntable serving as a support for material to be cut, means for operating said handle from a normal to an alternate.` position to perform al cutting operation the size otV said enttinginember, means for releasing said handle and rotating said turn-table, means tor repeatedly operating said handle to increase the size of the opening cut by the cutting member, and to rotate the turn-table after each operation;

13. In combination with a handle and a cutting die actuated thereby, a turn-table having key and frictional elements for maintaining material to be cut in place, together with means controlled by said handle for repositioning said turnetable in the path of said cutting die following each operation of said handle.

In witness whereof, I hereunto subscribe my name this 8th day `of January, A. D.,

JOHN G. BLESSING.

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