US2280163A - Pattern reproducing machine - Google Patents

Description

' April 21,1942. a. F. RYAN 2,280, 63 PATTERN REPROPUGING MACHINE Filed Nov. 8, 1940 3 Sheets-Sheet 1 April 21, 1942. G.-F. RYAN Q PATTERN REPRODUGING MACHINE Fil ed Ndv. s, 1940 s Sheets-Sheet s Patented Apr. 21, 1942 UNITED STATES PATENT 3 OFFICE PATTERN REPRODUCING MACHINE George F. Ryan, Peabody, Mass; assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application November 8, 19510, Serial No. 364,822

9 Claims. (01.33-423) This invention relates to pattern reproduction model parallel toits length are multiplied by a' constant and all lines drawnin it parallel to its width are multiplied by an independent constant and are so reproduced in the pattern. A shoe quarter cut from apatternso graded will not properly fit a last because of excessive height of the heel end of the quarter. This difficulty'results from two arbitrary variations from normal 506, the illustrated machine comprises four prigrading, one of which occursin the grading of a lasts, and the other in grading of patterns to meet requirements'in fitting shoes to the foot.

Because the toe spring and heel height of a last are exaggeratedif the l'ast isgraded in the ordinary manner, it is necessary to vary the angular relation between the fore andheel parts of the last in accordance with the change in grade to maintain the toe spring and heelheight constant. It is apparent that such correction in the grading of lasts by which the heel part is lowered i one cause of the above mentioned exnonpantographic variation to the normal grading movement of the tool in response to the differential movement between the tool and the model follower in a direction transverse tothe grading movement.

, In view of the foregoing, the object of the present invention is to, provide a simple, accurate and easily operated grading machine adapted for operating upon metal, the normal pantographic grading action of which'can be varied to obtain the above mentioned cutting down eliect in a pattern through any desired portion of the grading operation and without causing any discontinuity in the pattern where the grading action is changed from one type to the other. 1 n

As in a machine of the Ryan patent, No. 2,148,-

mary instrumentalities, namely, a workholder, a model holder, a model follower, and a tool, and grading mechanism connecting two of them constructed and arranged to utilize the'actual movement of one in acertain direction to impart a grading movement ,tothe other in the same direction. The illustrated machine, in accordance witha feature of the invention, includes in its grading mechanism means driven only by the actual movement of the first mentioned instruinentality of the two referred to above in a direca titontransverse to that of the grading movement for varying the extent of the grading movement.

a This means, as disclosed herein, comprises a lever cessive heightof a pantographically gradedfshoe avoid its cutting into the ankleof the wearer of the shoe. These matters are different aspects of the same problem as itapplies to pattern grading, and this problem has been treated in United States, Letters Patent No. 1,807,195,

mounted and arranged to move bodily in the direction ofthe grading movement and to swing in response to the movement of the said first mentioned instrumentality in a direction transverse to the grading movement, the swinging movement of the lever being utilized to impart a nonpantcgraphic component to the normal grading movement which is derived from the bodily movement of the lever. I

In accordance with another feature, of the in vention, the lever and mechanism associated therewith is arranged sothat its action can be grantedMay 26, 1931, upon an application of varied as to extent and can be started and stopped at any selected point in the grading operation without causing any dis-continuity in the i cut made in the pattern.

These and other features of the invention compr ing certain combinations and arrangemerits of parts will beapparent from the following description of anembodiment of the invention shown in the drawings, in which n Fig; 1 is a plan view of a part ofan illustrative machine embodying the invention;

Fig. 2 is a View in front elevation of a part of the machine shown in Fig. 1;

Fig. 3 is a sectional elevation, the section being taken along the line IIIIII in Fig. 2;

Fig. 4 is a sectional plan view of a part of the mechanism shown in Fig. 2, the section being taken along the line IV--IV; and

Fig. 5 is a diagrammatical View illustrating a comparison between the results produced in grading a shoe quarter by the use of the illustrated machine, and by prior practice.

The illustrated machine comprises a frame [0, Fig. 1, upon which are mounted for movement independently of each other in mutually perpendicular directions a work support l2 and a tool head M, the latter having a rapidly reciprocating tool holder l6 adapted to carry a punch which cooperates with a die to cut a pattern from a piece of sheet material held by the work holder l2.

The work holder I2 is mounted on a carriage l8 which is arranged to move in an east and west direction (lengthwise of the machine) on ways carried by a second carriage 22. The carriage 22 is arranged to move in a north and south direction (crosswise of the machine) on ways 25 mounted on the frame I0. Only one of each of the ways 20 and 24 is included in the part of the machine shown in Fig. 1.

The tool head I4 is mounted on a carriage 26 arranged to move north and south on ways 28 (only one being shown) carried by another carriage 30; and the carriage 30 is mounted to move east and west on ways 32 (only one being shown) I which are fixed to the frame ID.

A model 34, from which a pattern is to be reproduced in a work piece held by the support I2, is fixed to a holder 36 mounted on the frame H). The model 34 is traced by a model follower 38 which is carried by a bracket 40 fixed to the carriage l8. The work piece is thus moved in a path corresponding to the edge of the model and if the tool head !4 is stationary throughout this movement of the work piece the model will be duplicated in the work piece since the punch and the model follower 38 have the same diameter.,

If it is desired to make an enlarged or reduced reproduction of the model, a grading movement is imparted .to the tool head M in the north and south direction or the east and west direction, or in both of these directions simultaneously, by separate width and length grading mechanisms which utilize the north and south movement of the work holder l2 and its east and west move ment to impart width and length grading movements respectively to the tool head. Of these mechanisms, only the width grading mechanism is illustrated in Fig. 1.

This mechanism comprises a principal grading lever 42 which is pivoted to a bracket 44 fixed to the carriage 35). The lever 42 also comprises an extension 66 which is pivoted at 68 to the lever and is held in any desired angular relation to the lever by a clamp 50. In order to permit the angular relation between the lever 42 and its extension 46 to be varied by definite amounts or to permit one such relation to be definitely and repeatedly established they are connected by an are 52 fixed to the extension 46 and an arm 54 carried by the lever 42. The are is provided with a series of holes any one of which is adapted to receive a sliding pin carried by the arm 54. This mechanism is commonly known as a "shift which will be referred to later. The lever 42 is connected to the tool head I4 by a link 56, one

end of which is adjustable along the lever 42 so as to make it possible to control the extent of the north and south grading movement of the tool head.

As thus far described, the illustrated machine is the same as that disclosed in Patent No. 2,148,- 506. granted on February 28, 1939, in the name of G. F. Ryan, to which reference may be made for a complete description of the construction and arrangement of the parts of the machine referred to above. It is to be understood that the illustrated machine comprises all of the mechanism of the above mentioned patented machine including a length grading mechanism which is substantially a duplicate of the width grading mechanism referred to above. The length grading mechanism is connected to the tool head M by a bar 60 which is pivoted at 62 to the bracket 44, and is driven by the east and west movement of the carriage l8 along the ways 20.

Novel mechanism provided by the present invention is interposed between the extension of the lever 42 and the carriages l8 and 22, the construction and purpose of which mechanism will now be described with reference to a difficulty in pattern grading which this mechanism overcomes.

Referring now to Fig. 5, in which M represents a 4-B model of a shoe part which is to be graded up to a 10-3 pattern P, the proper fitting of a series of such shoe parts of different sizes to the corresponding lasts or to the foot requires that the width of the shoe parts along the line DD be increased in a certain ratio as they are graded up from the model. If the rear portion of the quarter were width graded as along the line C at the same ratio the top line of the upper would be so high in the larger sizes of shoes as to cut into the ankle of the wearer. It is, therefore, common practice to grade quarters at their rear ends in increments of of an inch between sizes, although the corresponding increment at the position DD is considerably greater. This result is effected in the use of the machine of the Ryan'patent by using the above mentioned shift, in the following manner The model follower 38 is first moved so as to trace the throat of the model M, Fig. 5, the machine having been set so as to center grade (1:1 reproduction) whereby the shape of the throat of the model is duplicated in the pattern. Appropriate settings of the length and width grading mechanisms are now made for producing a 10-3 pattern P. The rear end of the model is next traced from the throat line to the corner E. At this time the position of the tool relatively to the pattern is at E, the heightwise distance between the points E and E constituting an excessive increase in the height of the quarter at its rear end as pointed out above.

In order to cut down the height of the quarter,

the above mentioned shift is thrown through as many holes on the are 52 as may be necessary to move the tool head toward the longitudinal axis of the pattern by the amount which is to be removed from the pattern. This operation of the shift causes the cutter to be moved from the point E to the point F. The outside edge of the model is now traced by the follower 3B forwardly from the point E for a short distance during which the cutter moves to the point G on the pattern. The follower 38 is then moved away from the model causing the tool to be moved to the point H. The shift is now thrown back to its original neutral position and the outer edge of the model is traced by the follower 38, thereby causing the tool to cut the pattern along the line .C'. This operation results in an undesirable jog being formed (by the cut E, F, G', and H) below the edge C ofthe pattern which must be removed by a hand operation, that is, the pattern after being removed from the machine is sheared and filed along a line J continuous with the bottom F, G of the jog and becoming tangent to the edge C of the pattern rearwardly of the line D, the line J being made as similar as possible to the corresponding shape of the model according to the judgment of the operator.

This hand operation is subject to the objections of being inaccurate and expensive, the latter objection being aggrevated when the patterns are made of metal. It is apparent from Fig. that the cut F, G cannot be extended very far forwardly of the pattern since this line will always be parallel to the edge C of the pattern as normally graded and hence will run too deeply into the pattern at its mid-portion where the normal width grade should be maintained. Thus, the shift is used merely to measure the height of the rear end of the quarter. By the use of mechanism now to be described it is'possible progressively to vary the width grading movement of the tool head so as to cause the pattern to be outwith a continuous edge requiring no hand finishing, the position of which, at the heel ,end of the pattern, is the same as it would have been if made by the use of the shift referred to above. This mechanism comprises a bracket 64,Figs. 1 and 2, which is fixed to the carriage 22 and is provided with ways66 extending in a north and south direction. A carriage 68 is provided with one set of rolls I8 arranged to run on the upper surfaces of the ways86 and a second set of rolls I2 which are arranged to roll against inclined lateral surfaces on the ways whereby the carriage 68 is permitted to roll freely in the north and south direction only. The carriage 68 is also provided with ways 14 extending in the east and west direction on which ways is mounted for movement in the same direction a carriage "having two sets of rolls I8, 80 which engage the ways I4. The carriages 88 and I6 constitute means for driving the extension 46 of the width grading lever 42, the extension 46 being pivoted to a stud 82 fixed to the carriage I6. The above mentioned driving means is moved in a north and south direction to cause a width grading movement of the tool head in response to an east and west movement of the carriage I8 in orderto remove, along a continuous line, an unwanted margin from a regular width graded pattern as explained above. This mechanism comprises a second grading lever 84 which is fixed to a shaft 86 rotatably mounted on the bracket 64. An arm 88 is pinned to the shaft 86 so "as to rotate therewith and carries a set screw 90 having a conical point adapted to be seated in a recess 82 in a block 84 on the bracket 84 whereby the lever 84 can be located in its central position. The lever 84 is swung in response to an east and west movement of the carriage I8 by connections comprising a gear 96 which is rotatably mounted on the shaft 86 and meshes with another gear 98 fixed on one end of a lever I80.

The lever I00 is pivoted at I02 to the bracket 64, and is pivoted at I04 to a carriage I06 arranged to roll freely in only the north and south direction ona runway I08 which is fixed to the end A driving connection between the gear 96 and the arm 88 is effected by tightening a clamp IIO which is threaded on a stud II2 carried by the arm 88 and extending through an arcuate slot I I4 in'the gear 96. The lever 84 is connected to the carriage 68 by a link I I6 which, at one end, is pivoted to the lower side of the carriage at I I8. At its other end the link H6 is rotatably mounted on a stud I20 which extends through a wedge shaped block I22 and a T-shaped block I24 arranged to slide lengthwise of the lever 84 along correspondingly shaped grooves therein. The stud I20,and blocks I22, I24 can be locked in any desired position along the lever84 by a clamp I26, which is threaded on the study I20. By changing the position of the stud I20 along the lever 84 more or less north andsouth move ment may be imparted to the carriage 68 in response to a given east and west movement of the carriage I8. Definite control of the setting of the stud I20 along the lever 84 is effected by a plunger I28 which is mounted to slide vertically in an arm I30 fixed to the block I22. The plunger I28 is adapted to be received in any of a series of holes formed in an arcuate member I32 fixed to the lever 84. The length of the plunger I28 and its position relative to the clamp I26 .are suchthat when the plunger I28 is fully received in one of the holes of the member I32 the clamp I26 in being swung to lock the stud I20 to the lever 84 is moved directly over the head of the plunger and hence holds the latter in its operative position.

When the clamp I26 is released it is moved away from the plunger I28 which then, under the infiuence of a spring I34, moves upwardly out of engagement with the member I32. 3

In order to facilitate the resetting of the stud I28 at any desired position at either sideof its central position on the lever 84, stops I36 (similar in construction to the blocks I22, I24) are mounted for adjustment on the lever 84 lengthwise thereof and are adapted tobe fixed to the lever by means of clamps I38 which are threaded on studs I40 carried by the stops.

The illustrated machine can be used for regular width grading without disturbing the setting of the stud I28, assuming that the latter is not in its central posiion on the lever 84. Tothis end,

the carriage 68 is locked to the bracket 64 by a,

set screw I42, Fig. 2, which is threaded in the carriage 88 and is adapted to bear against the outer side of one of the ways 66. Under these circumstances jamming of the machine is prevented by releasing the clamp I I0 so as to permit the gear 96 to rotate freely on the shaft 88.

The operation and advantages of the above mentioned mechanism will now be described with reference to the grading of a 10-B pattern P from the 4-B model M of Fig. 5. The throat and back lines of the model are graded as before, the model follower and tool being brought to the points E and E respectively. With the tool thrownout of operation, the follower 38 is moved to a point K on the edge of the model corresponding to a similarly located point K on the pattern where the removal of the unwanted margin from the pattern, as regularly graded, is to begin. The position of the follower 38 at K is also such that the carriage 68 is in its central position on the bracket 84 as indicated by an index I44, Figs. 2 and 4, mounted on the carriage 68, and a scale I46 carried by the bracket 84. At this time the lever 84 also will always be in its central position, regardless of the setting of the stud I20, this position of the lever being indicated by the alignment of a pointer I48 fixed to the bracket 64 with a mark on the end of the lever 84;

The stud I20 is now moved along the lever 84 through as many holes on the member I32 as the shift of the prior machine would be thrown to cut down the height of the quarter to the required extent. The follower 38 is now brought to the point E on the model, and the tool is thrown into operation. The edge of the model is next traced by the follower from the point E to the point K during which movement a cut L is made in the pattern which gradually approaches the edge C of the pattern as regularly graded and becomes tangent to the latter at a point K, which is the position of the cutter corresponding to the position K of the follower. At this time, the stud I26 is moved back to its central position on the lever 84 preparatory to the regular grading of the portion of the model forwardly of the point K. It is to be understood that Fig. shows a little more than half of a model which is symmetrical with respect to its lengthwise axis. Accordingly, when the follower 38 reaches a point on the complete model opposite to the point K of Fig. 5, the stud I21! will be thrown the same distance as before but on the opposite side of the lever B l. Such setting of the stud I20 causes no discontinuity in the outline of the pattern since the link IIG may be swung freely with respect to the lever 84 while it is in its central position without moving the carriage 68, and hence, without imparting any movement to the tool head I4. It will now be apparent that in response to east and west movement of the follower 38 (and hence, the work holder), between the points E and K, a north and south movement is imparted to the tool head independently of the normal width grading movement which reduces the latter by an amount increasing gradually from zero at the point K on the pattern to the amount by which the height of the quarter is to be reduced at its heel end. It is also apparent that throughout this cut the tool is under the guidance of the model and that patterns graded from the same model will be similar to each other regardless of their size.

The spacing of the holes and graduations of the member I32 is such that when the stud I20 is set in one of them a certain east and west movement of the work holder (about 4 /2") will impart the same north and south movement to the cutter head as that provided by throwing the prior shift through the same number of holes.

If, however, it is desired to provide the same,

change in the height of the quarter over a smaller or greater distance lengthwise thereof than that referred to above, the following procedure is used: the follower 38 is first placed against the edge of the model at a point corresponding to that on the pattern from which the cutting down of the height of the pattern is to begin. The latch III] is released and the lever 8A is located in its central position by means of the screw 9!]. The clamp H0 is now tightened and the screw 90 is released. The follower 33 is next placed at the point E on the model and then the stud I20 is adjusted along the lever 86 until the index I44 on the carriage 58 is opposite to a graduation on the scale I46 corresponding to the same number of holes on the shift which would effect the required north and south movement of the tool head. It is thus apparent that by the use of the \scale I46 as above described, an operator is enabled to obtain the same cutting off effect at iii the rear end of a pattern as was formerly obtained by the use of the shift.

The follower 38 is now moved forwardly along the edge of the model from the point E until the pointer I48 indicates that the lever 84 has again reached its central position. The tool at this time is located at the edge of the pattern as regularlygraded. The machine now is again set for regular grading either by moving the stud I20 to its central position in the lever 84, or by clamping the carriage 68 to the bracket 64 by means of the set screw I42 and releasing the clamp I I0. Thus, regardless of where the transition occurs between regular grading and that resulting from the use of the mechanism provided by the invention, the pattern can be cut not only at the correct height at the heel end but also along a line having no discontinuity in it where the grade is changed from one type to the other.

It should be understood that the invention comprehends a machine of the type disclosed herein having a substantial duplicate of the grading apparatus carried by the bracket 64 associated with the ordinary length grading apparatus. That is, such a machine would have attached to the right-hand end of the carriage I8 a bracket similar to the bracket 64 and carrying mechanism similar to that which is mounted on the bracket 64. Such a mechanism would utilize north and south movement of the carriage I8 to vary the usual east and west grading movement of the tool head as in grading a continuous line of the model extending in the north and south direction.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder, a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected by grading mechanism constructed and arranged to utilize the actual movement of one of them in a certain direction to impart a grading movement to the other in the same direction, and means driven only by the actual movement of the said one instrumentality in a direction transverse to that of the grading movement for varying the extent of the grading movement effected by said mechanism.

2. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder, a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected by grading mechanism constructed and arranged to utilize the actual movement of one of them in a certain direction to impart a pantographic grading movement to the other in the same direction, and means driven only by the actual movement of the said one instrumentality in a direction transverse to that of the grading movement for adding a nonpantographic component to said grading movement.

3. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder, a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected by grading mechanism constructed and arranged to utilize the movements of one of them in each of two mutually transverse directions to impart a grading movement to the other in one of said directions, said mechanism comprising a lever mounted to move bodily in the direction of the grading movement, and connections between said lever and the said one instrumentality constructed. and arranged to swing said lever in response to only'actual movement of the said one instrumentality transverse to said grading movement whereby the extent of the grading movement effected by the bodily movement of said 1ever is varied. I

4. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder,

a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected by grading mechanism constructed and arranged to utilize the movements of one of. them in each of two mutually transverse directions to impart a grading movement to the other in one movement to the other in one direction, said mechanism comprising a principal grading lever associated with .saidother instrumentality, and a second lever associated with the said one instrumentality, the second lever being mounted for translatory movement and also to swing in said lever to swing freely into its central position when said locating means is. operated.

5.'In a pattern reproducing machine, four' primary instrumentalities, namely, a model holder, a work holder, a model follower, and a tool, grading mechanism comprising a principal grading lever associated with one instrumentality and a second grading lever associated with a second instrumentality, said second lever being mounted to move bodily with said second in-] strumentality in one direction to eifecta grading movement of the said one instrumentality a and to swing about an axis, means operated by movement of said second instrumentality transverse to said direction for swinging said second lever, and a member connected to said principal lever and mounted on said second lever for adjustment toward and from said axis whereby the extent of the grading movement effected by the bodily movement of said second lever is varied by its swinging movement.

6. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder,

a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected'by grading mechanism constructed and arranged to utilize the actual movements of one of them in each of two mutually perpendicular directions to impart a grading movement to the other in one direction, said mechaand connected by grading mechanism constructed and arranged to utilize the. actual move- .ments of one of them in each of two mutually perpendicular directions to impart a grading response to the said perpendicular movements respectively, and means connecting said second lever withysaid principal lever for utilizing the swinging movement of said second lever to vary the grading movement efiected by the translatory movement of said second lever.

8. In a pattern reproducing machine, .four primary instrumentalities, a model holder, a work holder, a model follower, and a tool, two of said instrumentalities being movable and. connected by grading mechanism constructed and arranged to utilize movement of one of them in each of two mutually perpendicular directions to impart a grading movement to the other in one of said directions, a carriage mounted for movement in the direction of grading movement,

prising a principal grading lever and a second grading lever rotatably mountedon one of said carriages, means operated by the actual movement of the other carriage for rotating said second lever, means fordriving said principal grading lever mounted on said first-mentioned carriage for movement in the direction of the grading movement, and a link connecting said driving means and said second grading lever, said link being adjustable along said second grading lever whereby the grading movement effected by the said first-mentioned carriage can be varied.

9. In a pattern reproducing machine, four primary instrumentalities, namely, a model holder, a work holder, a model follower, and a tool, two of said instrumentalities being movable and connected by grading mechanism constructed and arranged to utilize the actual said lever in response to movement of said one instrumentality on said carriage whereby said member is moved relatively to said carriage, means for holding said member immovable relatively to said carriage and means for rendering the first-mentioned means inoperative when said member is fixed to said carriage whereby grading movement is imparted to said other instrumentality in response to movement of said one instrumentality only in the direction of the grading movement.

GEORGE F. RYAN.

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