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Dec. 17, 1946. w. J. KINDERMANN ETAL 2,412,619 APPARATUS FOR AND METHOD OF MAKING CONTOURED ELECTRICAL RESISTANCE CARDS Filed May 3, 1944 3 Sheets-Sheet l FIG? W J K/NDERMANN W 14! WERR/NG ATTORNEY Dec- 17, 1946. w. J. KINDERMANN ETAL 2,412,619 APPARATUS FOR AND METHOD OF MAKING CONTOURED ELECTRICAL RESISTANCE CARDS Filed May 5, 1944 ' 5 Sheets-Sheet 2 mun“ I K km’ IIH 53. ' - / '7 . Fill "LB" 58 96: “as 75a 87a2 9/ ‘94 95 : i W J ~KINDEA’MANN WVZNVTORS w w WERR/NG j Wm 23 M414 A TTORNE V Dec. 17, 1946. w. J. KINDERMANN ET AL 2,412,619 APPARATUS FOR AND METHOD OF MAKING CONTOURED ELECTRICAL RESISTANCE CARDS Filed May 3, 1944 _ 3 Sheets-Sheet 3 H65 53 - W J K/NDERMANN lNl/ENTORS _ WW WERR/NG BYJQ 71m X mm A TTOR/VE V Patented Dec. 17, i946 2,412,619 7 I STATE/S PATENT OFFICE 2,412,619 ' APPARATUS FOR AND METHOD OF MAKING CONTOURED ELECTRICAL RESISTANCE CARDS Wilfred J. Kindermann, Mount Vernon, and ' Walter W. Werring, New York, N. Y., assignors to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of New York Application May 3, 1944, Serial No.'533,996 9 Claims. 1 This invention relates to card making and more particularly to apparatus for and a method of making cards of predetermined precise forms. An object of the invention is to provide means for accurately making cards suitablefor use as supports for windings of wire used as resistance (01. 90-13) ' 2 ‘card varies in width along certain portions of the _ card} Precision is required in making the cards and e?orts have been made to cut cards to required, 1 dimensions and forms by ?rst making a templet ' of the required pattern and using this as a guide for a cutting tool or as a guide for a scriber to mark the required pattern of the card ,on a strip of material from which the card is to be made by cutting the material along the scribed line on the The present-invention provides a method of and means for accurately making a card without 10 material. This procedure of making the cards has been found unsatisfactory in some respects be ?rst making a templet of the precise form and cause it is dif?cult and expensive to make a templet dimensions required in the card and permits the elements in functionally precise electrical Poten tiometers. . . use of a templet somewhat inaccurate in form ' and dimensions compared with the form and di of the precise dimensions required and when the templet is laid on a sheet of material and used as mensions of the card required. The invention 15 a guide for a scriber or cutting tool‘ moved along the sheet of material and bearing against the edge also provides a method of and means for making of the templet the card pattern will not be ex accurately pro?led flat templets or cams. actly the same as the templet but will be slightly A feature of the invention resides in a pro?ler oversize and inaccurate in some other respects du head equipped with a cutting tool to cut a con 20 to the di?iculty of accurately locating the temple? toured edge of a card. relative to the work piece and errors that are in-/\ Another feature resides in a stylus means for~ controlling the cutting tool. Another feature resides in means provided for troduced in the cutting process. . ’ i In making cards in accordance with the present inventiton a plan of the desired card is made in parallel adjustments in the width of the card. Another feature resides in means provided for 25 dicating the length and thickness of the card and the width the card should be at predetermined supporting the cardand a, templet of the card. points. The plan of the card is laid out on a sheet Another feature resides in the method of mak ing a card of required form. of material suitable for use as a templet when cases in order to meet certain requirements of re provide a bolting space on the templet and allow ' out to the required form. The material used in In the drawings: the templet is a matter of choice but it will be 30. Fig. l is a view, in perspective, of a card cut assumed merely for the purpose of describing the ting machine including the invention, the templet invention that the templet is made of sheet metal and card being supported in the machine; and is substantially rigid. It will also be assumed Fig. 2 is an enlarged view, in perspective, of an in the interest of simplifying the explanation of end portion of the machine; Fig. 3 is an enlarged top plan view of the pro 35 the invention and not in the sense of a limitation thereof that the card will have one long ?nished ?ler head;' straight edge and the opposite long edge or por Fig. 4 is a front view of part of the pro?ler head tion thereof will be of curved form. Also, that and drawn to the same scale as Fig. 3; at one end of the card the short edge portion is Fig. 5 is a side view, partly in section, of the 40 straight and right angular with respect to the long pro?ler head shown in Fig. 3; straight edge portion. The pattern of the card Fig. 6 is a plan view of a templet; _is indicated on the templet material by making Fig.7 is a plan view of a card; and conical prick-punch marks in the' sheet metal at Fig. 8 is a plan view of a correction chart used predetermined spaced coordinate points and lines in ?nish pro?ling a card. In some precision potentiometers, now required, 45 are scribed on the material to connect with the prick-punch marks in succession and indicate a resistance element is employed Comprising a more fully the outline of the templet. Spaced card with resistance wire wound on the card. apertures are formed in the templet to receive The wire-wound card is supported in the poten stud bolts by means of which the templet may be tiometer so that a wiper contact may successive ly engage the turns of wire On the card. In some 50 bolted in place in a card making machine. To sistance values at predetermined points on the resistance element the card is made so that one long edge portion is not parallel with the other but is of a predetermined curved form so that the forming therein of the apertures for the stud bolts the templet is made wider at all points than the card by some ?xed dimension. Thus, at any point. the width of the templet is approximately _ 42,412,019 3 - . - equal to the width of the delsired card plus the "fixed dimension which has been added'to provide, space for the clamping‘ apertures. After the pat tern of the card is laid out and clearly indicated on the templet material the templet is cut from the sheet metal by sawing slightly outside the scribed lines, care being taken to insure that the - ' 4 located forwardly of the forward edge of the bar I8 so that the end point of bearing of one end of the card I8 against the end stop 23 will be forward of the forward edge of the bar I 8. It will be seen, therefore, thatwhen the card I 6 is placed in required position on the upper sur face of the platen I2 and so that the long straight edge of the card I6 is against the forward edge of the bar I8 and one end of the card, I3v is saw does not remove the outline marks on the material. After the templet has been cut the edges are ?led or machined down to the scribed 10 against the peripheral edge of the end stop 23 line thereby bisecting the prick-punch marks as ' ~ the point of engagement of the-end portion of closely as hand working will permit. When the templet is made it is an approximate pattern of the desired card. Although the card is held to the closest tolerance possible in machining methods the necessary accuracy in the templet is only that which is possible for hand ?ling. The templet is ?rst used in marking a, rough the card I9 with the end stop 23 will be truly it right angular with respect to the straight edge provided by the bar I8. The point of contact establishes a reference point on the card from which any other point along the abscissa or \straight edge may be determined by measure ment. One end of the bar I8 is secured to the outline of the card on a sheet of material from platen I2 by means of a screw 25 and a rela which the card is to be made. The sheet mate 20 tively long block 26 is mounted on the upper sur rial employed is a matter of choice but is usually face of the platen I2 in parallel relation with insulating material and quite often hard rubber and will be hereinafter called in this speci?cation a'sheet of insulating material. After the templet of the desired card is made the templet is laid on the sheet of insulating ma terial and the outline of the card is marked on the sheet of insulating material, the templet be the rear surface of the bar I8. I L-shaped bars 21 are provided to retain the card I9'in required place on the platen I2. Each bar 21 is mounted on a stud bolt 20 and com prises a relatively long straight leg portion 28 ' terminating at one end in an angularly disposed foot portion 29. The leg portion 28 is provided ing used as a guide for the marking tool. The with an elongated aperture 30 to accommodate sheet of insulating material is then cut along 30 a stud bolt 20 and the leg portion 28 is disposed the marked lines to obtain a card having, in gen between the nut 2| and the nut 22 which coop eral, the outline of the card required but approx erate with the stud bolt 20 to hold the bar 21 in imately one-eighth inch greater in width. Two or more cards are made in this manner and the cards are subsequently ?nish pro?led in the card cutting machine of the present invention. The card cutting machine as shown in Fig-1 adjusted position. The foot portion 29 extends downwardly toward the upper surface of the platen I2 and may be clamped down into en gagement with a block'3l disposed between the lower end of the foot portion 28 and the upper surface of the card I9. The long block 26 is lo ' thereon to support a platen I2 which is arranged cated rearwardly of the stud bolts 26 and serves to slide along the tracks II. The platen I2 is at 40 as a rest for the portions of bars 21 extending tached to an apron I3 which extends over. the rearwardlypfthe stud bolts 20. front portion of the machine and is operable An elevated platform 32 supported on posts 33 lengthwise of the machine by means of a lead and 34 is mounted on the platen I2, the platform screw I4, the apron I3 having means, not shown, 32 being located above the plane of the platen but supported therein and engaging the lead 45 I2 and extending lengthwise of the platen I2 screw I4 and the lead screw I4 being driven by and in parallel spaced relation therewith. The means of a motor and gears, not shown, but which platform 32 is located above and rearwardly of may be located in a driving head I5. The apron the position of the card I9 and provides a means I3 is also equipped with means to release the of support for a templet 35. Spaced stud bolts apron and parts contained therein from driving 50 36 equipped with ?anged nuts 31 are mounted on engagement with the lead screw I4. Manually the platform 32 to hold the templet 35 in posi operable means comprising a handle I6 sup tion. A plate 38 apertured to accommodate the ported on the apron I3 and a rack I1 attached to stud bolts 36 is supported on the platform 32 and the bed III are provided to move the platen I2 on the plate 38 a ?at strip 39 also apertured to along the tracks II, the handle I6 being gear 55 accommodate the stud bolts 36 is supported to connected to the rack I1 by means of a pinion, serve as a rest for the templet 35, the strip 39 not shown, but having mechanical connection being narrower than the templet 35 and serving with the handle I6. to hold the templet 35 above the plane of the Extending lengthwise of the platen I2 and se plate 38. A back wall 40 extends along the rear cured to the upper surface thereof is a ?at bar 60 of the platform 32 to provide a straight edge for I8 which serves as a straight edge against which one long edge of the templet-35. Removably the long straight edge of the card I9 may be mounted on a pin 4I extending upwardly from placed. The bar I8 is apertured at spaced points one end portion of the strip 39 is an annular to accommodate stud bolts 20 mounted on the end stop 42 for one end of the templet 35 and a platen I2 and arranged to extend upwardly rectangular bar 43 secured by means of screws 44 through the apertures in the bar I8. ‘The stud. to the platform 32 is provided as an end stop bolts 20 are equipped with nuts 2| and 22, the for the plate 38. The point of contact estab nuts 2| serving in cooperation with the stud bolts lishes a reference point on the templet corre 20 to hold the bar I8 in place on the platen I2. sponding to a similar point on the card. An end stop 23 of annular form is provided near 70 Extending upwardly from, and secured to the one end of the platen I2 to bear against one end back of the base III are two spaced arms 45 and of the card I9. The end stop 23 is removably 46 the upper ends of which extend transversely supported on a pin 24 mounted on and extend over and in parallel spaced relation with the ing upwardly from the upper surface of the platform 32 and the platen I2. The arms 45 and platen I2. The pin 24 and the end stop 23 are 1 46 are stationary and serve as supports in a comprises a bed Ill with spaced tracks II formed 2,412,619 profiler head 41 under which the platen _I2 is op erated along the bed "I. Secured to the under surface of the upper portions of the arms 45and 46 is an apertured plate 48 in the four corner on the forward portion of the carriage 5|, the bearings 11 and 18 extending forwardly of the forward end of the carriage I5| and so that the shaft 15 extends in parallel spaced relation with portions of which are mounted peripherally 91 the forward end of the carriage 5|. The shaft 15 extends transversely through the outer end grooved wheels 49 extending downwardly below the under surface of the plate 48. The wheels 49 are rotatably supported on bolts 50 and coop erate to form supporting means for a carriage portion 14 of the lever 63 and is supported at one end by means of an end thrust bearing 19 com prising a screw 80 adjustably supported in a block_ 5| provided with tracks 52-52 engaging in and 10 8| mounted on a support 82 by means of screws _ 83, the support 82 being secured by means of supported by the wheels 49. The carriage 5| is screws 84 to the bearing 18. A pin 85 mounted slidable transversely of the bed H] and the platen l2 and provides a movable support for a motor 53 equipped with a chuck 54 in which a rotatable cutting tool 55 is supported. The motor 53 ex tends through an aperture 56 formed in the car-, riage 5| and is secured to an‘ apertured mounting plate 51 which is securely fastened by means of screws 58 to the carriage 5|. It will be seen that the carriage 5| is movable transversely of the platen |2 to permit the motor 53 and the cutting tool 55 carried thereby to be moved transversely with respect to the bed ID of the machine and relative to a card |9 supported on the platen l2. The carriage 5| is normally urged toward the ~ back of the machine by means of a weight, not shown, but which is attached to a tow line 59 extending over a pulley 68, one end of the tow line 59 being secured to a ring bolt 6| mounted on the carriage 5| and the pulley 60 being suitably sup- - ported rearwardly of the carriage 5|. The pulley 68 may be supported, for in'stance, on a shaft 62 extending between and supported on the arms 45 and 46 and the weight on the tow line 59 be ing located below the upper surface of the bed III of the machine. A lever 63 is pivotally mounted in a bearing 64 ’ in an end of the shaft 15 and having a hemi spherical head is located between the screw 88 and the. end of the shaft 15., A turning knob 86 is provided on one end of the screw 88 to provide a means for turning the screw 80. Mounted on one side of the' outer end portion 14 of the lever 63 is a ring 81 through which the shaft 15 extends. The ring 81 is securely fastened to the outer end portion 14 of the lever 63 and is formed on its outer face to provide a cam sur face 88 which is engaged by a round head portion 89 of a screw 98 mounted on the shaft 15 and extending radially of the shaft 15. Supported on the shaft 15 and located between the bearing 18 and the outer end portion 14 of the lever 63 is a spring 9! which constantly urges the outer end portion 14 of the lever-63 toward the screw 90 and so that the cam surface 88 on the ring 91 bears against the round head 89 on the screw~ 98. When the shaft 15 is rotated so that the round head 89 on the screw 90 is engaged by relatively high parts of the cam surface 88 the outer end portion 14 of the lever 63 is moved against the action of the spring 9| and toward the bearing 181/v This movement of the lever 63 causes the follower supported on the under surface of the carriage 5|, the bearing 64 being secured in pace by means 16 to move further away from the center of the riage 5|. A relatively large stem 10 is mounted in the lever 63 and extends upwardly therefrom into the bearing 64, the upper end of the stem 19, the spring is also against the pull of the weight on motor 53. When the shaft 15 is rotated to move of screws 65 which extend through a flange 66 on ii) the screw 98 so that the round head 89 of the screw 90 is moved into engagement with a low the bearing and through a spacer ring 61 located portion of the cam surface 88 the spring 9| causes > between the ?ange 66 and the lower surface of the lever 63 to move so that the follower 16 comes - the carriage 5| and then into the carriage 5|. nearer the position of the motor 53. When the An annular boss 68 on the bearing 64 extends into follower 16 is against the templet 35 motion be an aperture 69 formed in the carriage 5| but tween follower and motor against the action of does not extend to the upper surface of the car having an annular ?ange 1| disposed in the aper- ‘ ture 69 and bearing on the upper end of the boss 68 of the bearing 64. The lever 63 comprises an arm .12 and a relatively wide body 13. The arm '12 extends forwardly of the forward end of the carriage 5| and the outer end portion 14 of the the tow line 59. The shaft>15 may be rotated by manual oper ation of a stylus 92 secured in a holder 93 by means of a setscrew 94. The holder 93 is trans versely apertured to accommodate’ a flanged bushing 95 secured to the holder 93 by means of screws 96 and the bushing 95 is keyed to the shaft 15 by means of keys 91. Movement of the holder 93 and bushing 95 lengthwise of ‘the shaft 15 may be accomplished only when a thumb screw 98 is released from engagement with the shaft 15, the thumb screw 98 being mounted in a arm 12 is transversely apertured to loosely receive a shaft 15. Supported in and extending down wardly from the body 13 and located to the right of the pivotal point of support of the lever 63 is a pin 16 which will hereinafter be called a fol 60 tapped hole in the holder Y93 and projecting - through the bushing 95 and being operable to lower 16. The follower 16 is ‘arranged to engage engage the shaft 15. Spacer sleeves 99 and I00 an edge of the templet 35 and will follow the edge are mounted on the shaft 15 to prevent extensive of the templet 35 and in cooperation with the movements of the holder 93 lengthwise of the templet 35 will cause the carriage‘ 5| to move shaft 15, the sleeve 99 being disposed between transversely of the platen |2. _ the ?anged end of the bushing 95 and the bear It will be seen as shown in Fig. 3 that the fol ing 18 and the sleeve I80 being disposed between lower 16 is located to the rear of the position of the holder 93 and the bearing 11. To facilitate the motor 53 and directly in line with the center manual movement of the stylus 92 to cause ro of the motor 53. It will also be seen in this tation of the shaft 15 a handle |0| is provided ?gure that the lever 63 maybe operated in the on the stylus 92, the handle |0| extending manner of a bell crank lever to move the follower through a transverse aperture formed. in the 16 relative to the motor 53 to change the dis tance between the follower 16 and the motor 53. v The shaft 15 is supported in spaced bearings 11 and 18 extending from a support 19 mounted stylus 92. ' The mechanical means for moving the fol lower 16 relative to the center of the motor 53 3,412,610 _ 7 v . - to change the distance between the follower ‘I3 and the cutting tool 55 and involving the stylus 92, the stylus holder'93, the shaft ‘I3, the screw 89, the cam ring 81 and the lever 63 is construct ed and arranged so that the distance of move ment of the follower ‘I6 will be much less than the distance of corresponding movement of the lowermost end of the stylus 92. The ratio will depend on the form and arrangement of the . 8 - sent the curved edge of the templet 35 and the correspondingly curved edge of the card cut in accordance with the templet. The line I03 is made by means of the stylus 92 which is ar ranged to press downwardly on the correction sheet I04 when the machine is operated to make the platen I2 carry the correction sheet I04‘ under the stylus 92. The line I03 may be simply a scratch mark made on the correction sheet lever 63, the form of the cam surface 83 on the 10 I04 by the point of the stylus 92. A more readily ring 81 and the distance the lower end of the stylus 92 is from; the axial line of the shaft 15. distinguishable line I 03 may be made however by placing a sheet of carbon paper between the In an actual set-up of the machine now made point of the stylus 92 and the upper surface of theratio is 75 to 1 and it will be assumed merely the correction sheet I04 and so that the stylus for the purpose of further explaining the inven 15 92 and the sheet of carbon paper-will cooperate tion and not in the sense of a limitation thereof that the follower ‘I6 vis moved one‘ seventy-fifth of the distance the lowermost point of they stylus to produce a carbon line on the correction sheet I04. The machine is ?rst operated to make the 92 is moved transversely of the platen I2. ' curved edge on the card conform to the curved A thumb screw I02 mounted in a tapped hole 20 edge on the templet and to make the line I03 in the bearing '11 and operable to engage the shaft ‘I5 is provided to hold the shaft ‘I5 againstv rotational movement. When the thumb screw - on the correction sheet I04. In this case the templet 35 is secured in required position on the elevated platform 32, the card I9 is secured in a I02 is tightened to hold theishaft 15 against corresponding position on the platen I2, the cor rotational movement the stylus 92 cannot be op 25 rection sheet I04 is mounted forwardly of the erated to cause movement of the follower ‘I6. card I9 on the platen I2 and the shaft ‘I5 is held In this case a forward movement of the follower against movement by means of the thumb screw ‘I6 will cause a corresponding movement of the I02 and the screw 80. Under this condition the carriage 5| and the stylus 92. follower ‘I6 bears against the curved edge of the The turning knob 86 and the screw 80 provide 30 templet 35 and the cutting tool 55 bears against a means/for initially adjusting the lever 63 to the curved edge of the card I9 since the carriage set the follower ‘I6 at a required distance from 5I is urged toward the rear of the machine by the the position of the cutting tool 55, the thumb weight on the end of the tow line 59. screw I02 being loosened to permit longitudinal When the machine is operated with the parts in movement of the shaft ‘I5 prior to turning the the condition above indicated and the motor 53 knob 86., Turning of knob 86 and screw 80 also is operated to rotate the cutting tool55 the curved permits ?xed parallel adjustment to be made in edge of the card I9 is accurately pro?led to con the width of the card independently of the op form to the curved edge of the templet 35 since eration of stylus 92. In high accuracy potenti the platen I2 is moved lengthwise of the machine ometers such adjustments are necessary to com under the action of the lead screw I4 and the pensate for variation in the card thickness. The cutting tool 55 is rotating and bearing against knob‘ 86 "may be graduated to obtain .001 inch the curved edge of the card I9 while the carriage increment changes in the distance: between the 5I is, in effect, cammed by means of the templet follower ‘I6 and cutter 55. . ‘\ 35 against the action of the weight on the tow 45 The stylus 92 may be used to perform two line 59. The stylus 92 makes the line I03 on functions one of which is to make a line I03 on the correction sheet. I04 since the correction sheet a sheet I04 supported on the platen I2,- the sheet I04 is moved under the stylus 92 while the stylus I04 being later used as a plan of correction in 92 is hearing against the correction sheet IN pro?ling the card. The other function of the or against a piece of carbon paper laid over the stylus 92 is to follow a correction line I05 made 50 correction sheet I 04. The line I03 corresponds on the sheet I04 and showing in magni?ed form to the curved edge of the templet 35 'since the corrections that must be made in the card orig stylus 92 is moved under the action of the car riage 5I. ' inally produced in order to make the card sat isfactory for the requirements. After the card I 9 has been pro?led and the line The sheet I04 is shown in Fig. 8 and will here 55 I 03 has been made on the correction sheet I04 inafter be ‘called the correction sheet I 04 and in the manner above described the bars 21 are may-be a rectangular sheet of paper or other loosened by suitably turning the nuts 22 and the material suitable for having records made card I9 is removed from the machine. The card thereon. The correction sheet I04 is of su?i I9 is then measured for width at certain pre cient length and width to have made thereon a 60 determined points and notations are made of pattern of the curved edge of the templet 35 and any differences in the width of the card at these indications in magni?ed form of changes to be ‘points from what is required in the desired card. made in the curved edge of the card cut in ac The card is usually found to be a few thousandths cordance with the templet. Of an inch too wide or narrow at the points meas The correction sheet I04 is placed on the 65 ured since the templet 35 in being made is not platen I2 forwardly of the positions of the card I9 and the templet 35 and so that it will pass under the stylus 92 when the platen I2 is moved - ?led to the precise limits required'in the pro?le of the card and other errors are introduced in ~mounting the templet in the machine and in lengthwise of the bed I0 of the machine, the the cutting process. Spaced lines are made on correction sheet I04 being secured in place by 70 the correction sheet I04 to indicate thereon the means of some adhesive material. A convenient points at which the card I9 is measured. The way of securing the correction sheet I04 in place lines just previously mentioned extend directly is to apply strips of adhesive tape to the cor across the correction sheet I 04 from one long rection sheet I04 and the platen I2. A line I03 edge portion to the other and cross the line I03 is made on the correction sheet I04 to repre 75 and may be any number required to indicatethe 2,412,019 9 . points at which the card I9 is measured. In Fig. 8 the lines are numbered I06 to I43, inclu-i sive, and indicate that the card I9 has been ' 10 the curved edge of the templet 35. Under this condition the cutting tool 55 operates to cut material from the engaged edge of the card to an extent permitted by the follower ‘I6 and its measured at 38 points and that some of the points of measurement are closer together than others. 5 instant point of engagement on the templet 35. Wherever the card I9 is found to be overwidth When the follower ‘I6 is moved nearer the cut a dot is made on the correction sheet I04 to ting tool 55 more material will be cut from the indicate at what point the card I9 is overwidth edge of the card than when the follower ‘I6 is more distantly positioned from the cutting tool and how much the card I9 is overwidth at this point. The overwidth indications are magni?ed 10 55. By manually keeping the stylus on the cor with respect to the actual overwidth measure rection line I05 the operator controls the posi ment in order that the operator of the machine tion of the follower ‘I6 relative to the cutting tool 55 and consequently the depth to which the may more readily see at what point the card I9 is overwidth and how much the card is overwide . cutting tool .55 cuts the edge of the card. As at the points indicated. The magni?cation will 15 suming as above explained that the ratio of move \ment of the stylus 92 and the resultant effect on be of the same order as is obtained in the move ment of the stylus 92 relative to the movement the cutting tool 55 is ‘75 to 1 an inward move of the follower ‘I6 under the action of the lever ment of the stylus 92 toward the cutting tool 5-5 seventy-?ve thousandths of an inch will in 63. It will be assumed as above mentioned that the ratio is 75 to 1. Under this condition the 20 crease the depth of cut made by the cutting tool overwidth indications are shown as magni?ed‘ '75 55 in the edge of the card one thousandth part of to 1 and a one thousandth of an inch overwidth an inch. It will be seen, therefore, that as the of the card I9 at any predetermined point will platen I2 is being driven along the-bed of the be indicated as seventy-?ve times that at a machine 'to move the card and templet longi corresponding point on the correction sheet I04. 25 tudinally the cutting tool 55 will pro?le the en gaged edge of the card I9 and the depth of cut For instance, at line I06 the card I9 is correct in width and at certain other points the card I9 will be changing in accordance with the move is overwidth one seventy-?fth of the amount in ments imparted to the stylus by the operator. ‘ The operation of the rotating cutting tool 55 dicated by the line I05 which is drawn to connect the dots made‘on the lines I06 to I43 in order 30 against the edge of the card I9 creates dust—like that an operator of the machine may more particles of material cut from ‘the card I9. To readily see the error indications and guide the. prevent an accumulation of the dust-like particles stylus 92 to the points required when the card on the cutting tool 55 and on the edge of the I9 is being ?nish pro?led. ' card I9 a vacuum cleaner apparatus may be In ?nish pro?ling, another card I9 is placed 35 employed, the nozzle I45 of the vacuum cleaner ' in the exact position in the machine as the pre apparatus being mounted on the carriage 5| of vious card and the bars 2'Iv are operated to hold the pro?ler head 41 and relatively close to the the card I9 in place. The thumb screw I02 is cutting tool 55. ' operated to release the shaft ‘I5 for rotation, the We do not consider our invention to be limited shaft ‘I5 being manually rotatable by means of to the particular machine or'form of the parts the stylus 92. The stylus 92 is moved to clear the shown and described since other means may be point from the correction sheet I04 and turn the employed for the same purpose, but only by the shaft ‘I5 so that the low portion of the cam ring appended claims. 0‘! is engaging the head 89 of the screw 90. The What is claimed is: platen I2 is then moved along the bed I0 by 45 '1. A machine for cuttingan edge of a card manual operation of the handle I6, the apron to a precise predetermined pattern comprising a I3 having been previously unclutched from the support for the card, a support for a templet lead screw I4. When the platen I2 has been of the card, a carriage operable to move trans moved to bring the card I9 and the templet 35 versely of the card, means to urge said carriage to a required starting point and the operator is 50 toward the support for the templet, means to ready to ?nish pro?le the card I9 the apron I3 cause relative movement of said supports and is clutched to the lead screw I 4, by manual op said carriage, a cutting tool and a driving means for said cutting tool supported on said carriage, eration of the handle I44. The stylus 92 is then placed on the beginning of the line I05 and the a lever pivotally supported on said carriage, a’ machine is started to ?nish pro?le the card I9. 55 follower supported on said lever and spaced from While the machine is operating to ?nish pro?le said cutting tool, said follower being operable to bear against the templet to control the engage» the card, the stylus 92 is manually held by the operator graspingthe handle I III and the oper; ment of said cutting tool against an edge of the ator keeps the stylus 92 on the correction line ' card and a manually operated stylus carried by I 05 on the correction sheet I 04 during this second 60 said carriage and mechanically connected to said operation of the machine. when the point of lever and operable to move said lever to change the stylus 92 is swung inwardly toward the cut the spacing of said follower relative to said cut ting tool 55 the shaft ‘I5 is rotated so that the ting tool. round head portion 89 of the screw>90 moves 2. A machine for ?nish pro?ling an edge of toward a low portion of the cam surface 88 65 a card to a precise predetermined pattern com-. allowing the spring 9| to move the outer end _ prising a support for the card, a support for a portion ‘I4 of the lever 63 toward the left of templet of the card, a pro?ler head extending the position shown in Figs. 3 and 4. This move over and in spaced relation with said supports, ment results in a movement of the follower ‘I6 means to cause relative movement of said sup toward the cutting tool 55 and therefore reduces 70 ports and said pro?ler head,’ a carriage slidably the distance of the follower ‘I6 from the cutting supported in said pro?ler head and operable to tool 55. Since the carriage 5I carrying the lever move transversely of said supports, a cutting 63 and the motor 53 is being urged rearwardly tool and means to drive said cutting tool sup ported on said carriage, means to urge said car of the machine under the pull of the weight on the tow line 59 the follower ‘I6 is kept against 75 riage toward the support for the templet, a 2,412,019 lever pivotally supported on said ‘carriage, a fol- '' ' lower supported on said lever and operable to bear against the templet, said follower being spaced from said cutting tool, a rotatable shaft supported on said carriage and extending trans versely through'said lever, a cam on said lever, ‘means on said shaft and engaging said cam to move said lever in one direction when said shaft is rotated. in one direction, means to return said lower relative to said cutting tool to make said cutting tool ?nish pro?le the edge of the card ac cording to the correction line on the correction sheet. ‘ t 6. A machine for pro?ling an edge of‘a card according to a templet of the card and for‘?n ish pro?ling the edge of the card according to a correction line made on a correction sheet and showing in proportionately magni?ed form errors lever to normal position when said ‘shaft is ro 10 found in the form of the edge line of the card comprising supporting means for the card, the tated to normal position and a stylus supported templet and the correction sheet, a pro?ler head, on said shaft and manually operable to rotate means to cause relative movement of said sup said shaft to change the spacing of said follower porting means and said pro?ler head, acutting » 3. A machine for pro?ling an edge of a card 15 tool carried in said pro?ler head and operable to cut the edge of the card, a follower carried in said comprising means to support the ‘card, means pro?ler head in variable spaced relation with said to support a templet of the card, a carriage, a cutting tool and operable to engage the templet, cutting tool carried by said carriage and operable a stylus carried by said pro?ler head and oper to cut the edge of the card, a follower carried by said carriage, said follower being spaced from 20 able to engage and follow the correction line on the correction sheet and means forming a me said cutting tool and being operable to engage chanical driving connection between said stylus the templet to control the operation of said cut and said follower and operable to transmit move ting tool inv accordance with the templet, means ments of said stylus to said follower to change the to urge said carriage and said follower toward said templet and a manually operable stylus 25 spacing of said follower relative to said cutting tool in required reduced proportions to make said carried by said carriage and mechanically con cutting tool pro?le the edge of the card correct nected to said follower and operable-to change ly and in required proportion to the errors found the spacing of said follower relative to said cut in the card and indicated in magni?ed form by tin? tool. ‘ ' from said cutting tool, ’ 4. A machine for ?nish pro?ling an edge of a 30 the correction line shown on the correction sheet. 7. A machine for pro?ling an edge of a card according to a templet of the card and for later ?nish pro?ling the edge of the card according to a correction sheet having a line thereon showing I card, a carriage extending over said platen and platform and movable transversely of said platen, 35 in proportionately magni?ed form errors found in the form of the edge line of the card compris a cutting tool operable to rotate against an edge in'g supporting means for the templet, the card of the card to pro?le the edge of the card, a mo and the correction sheet, a pro?ler head extend tor supported on said carriage and carrying said ing transversely of and in spaced relation with cutting tool, said motor being operable to rotate said cutting tool, a pivotally supported lever car 40 said supporting means, means to cause relative; movement of said supporting means and said pro-‘" ried by said carriage, a follower supported on said lever and operable to engage the templet to con ?ler said head, pro?ler a motor head and driven operable cuttingtotool cutcarried the edge trol the movement of \said carriage transversely of the card, a follower carried in said pro?ler head of said platen, said follower being spaced from said cutting tool, means to urge said carriage in 45 in spaced relation with said cutting tool, said follower being arranged to engage said templet a direction to keep said follower against the tem _ and being operable to move relative to said cut plet, a rotatable shaft supported on said carriage, ting tool, a manually operable stylus carried by a cam mechanism mechanically connecting said said pro?ler head and in spaced relation with shaft to said lever, and a manually operable stylus card comprising a platen to support the card, means to move said platen longitudinally, a plat form on said platen to support a templet of the supported on said shaft and providing a means to 50 ‘ said cutting tool, said stylus being operable to manually rotate said shaft to change the spacing of said follower relative to said cutting tool. traverse the correction sheet and move relative to said cutting tool, means forming a mechanical 5. A machine for pro?ling an edge of a card out according to a templet and for ?nish pro?ling the‘ edge of the card according to a correction sheet having a correction pattern thereon com prising supporting means for the card, the tem plet and the correction sheet, a head supported driving connection between said stylus and said follower and operable to transmit movements of said stylus to said follower to change the spacing of said follower relative to said cutting tool in re quired reduced proportions to make said cutting tool pro?le the edge of the card correctly and in required proportion to the errors found in the ~ in spaced-relation with said supporting means, means to cause relative movement of said support 60 card and shown in magni?ed form on the‘correc and operable transversely of said supporting tion sheet and releasable holding means for said stylus to hold said stylus against movement rela means, a cutting tool and means for ‘operating tive to said cutting tool. ing means and said head, a carriage in said head ' said cutting tool carried by said carriage, a fol I 8. A method of making a card of precise form lower spaced from said cutting tool and movably 65 and dimensions from sheet material comprising making a rough templet of the card required, cut supported in said carriage, said follower being op ting a card from sheet material, in accordance erable to engage thetemplet, means to urge said with the templet, measuring the card from point 'carriage in a direction to keep said follower to point and making notations of errors found against the templet, a stylus carried by said car riage and operable to follow the correction pat 70 in the dimensions of the card at the points meas ured, preparing a pattern of an edge of the card, tern on the correction sheet, a motion transmit making a line on the pattern to indicate in mag ting mechanism between said stylus and said fol ni?ed form and in comparison with the pattern lower and serving to mechanically connect said ‘of the edge line of the card, the errors found in stylus to said follower and said stylus being man ually operable to change the spacing of said fol 75 the form of the edge line of the card and ?nish -‘ 2,419,619 13 > ing on’ the edge of the card to make the card have the required form and dimensions while observ ing the errors shown by the line in magni?ed form on the pattern. b connection with said movable lever support, said stylus means and said movable shaft means be ing cooperable to move said movable lever support to continuously vary the distance between said follower and said cutting tool to correct errors de precise predetermined pattern comprising a sup termined by measurement of a test card in cut port for the card, a support for a tempiet, a cut ting subsequent cards, and adjustable setting ting tool operable to engage and cut an edge of means in engagement with said movable shaft the card, means to operate said cutting tool, means means and operable to move said shaft means to _ to cause relative movement of said supports and 10 superimpose a ?xed change in the distance be ' said cutting tool, a follower spaced from said cut tween said cutting' tool'and said followerinde ting tool and‘engageable with an edge of the tem pendently of the distance varying action of said plet to limit the depth said cutting tool may cut stylus means. _ ’ . the edge of the card, a movable lever support for WILFRED J. KINDERMANN._ 9. A machine for cutting an edge of a card to a said follower, stylus means, movable shaft means 15 supporting said stylus means and in mechanical WALTER W. WERRING.