US1536691A - Heel-blank breast-shaping machine - Google Patents

Description

- May 5, 1925.

H. W. RUSS HEEL BLANK BREAST SHAPING MACHINE Fil'd May 15, 1924 1 Sheets-Sheet 1 H. RUSS HEEL BLANK BREAST SHAPING MACHINE Fil'Ed May 15 1924 1 sheets-sheet 2 rllillli. ll|| III .1111 J ii...

May 5, 1925,

Fil fl May 15,, 1924 l Sheets-Sheet 5 May 5, 1925. 1,536,691

H. W. RUSS HEEL BLANK BREAST SHAPING MACHINE Fil ci May 15, 1924 I 4 Sheets-Sheet 4 Patented May 5, 1925.

{UNIT D STATES PATIENT OFFICE.

HARiLEY W. RU SS, F HAVERHILL, MASSACHUSETTS ASSIGNOR 'I'O MERR-IMACK "WOOD HEEL 00., OF. NEW HAMPSHIRE, A CORPORATION OF MASSACHU- SETTS.

1 HEEL-BLANK BREAST-SHAPING MACHINE.

application filed May 15, To all echo midi concern; I

Be it known that I, HARLEY W. Russ, a citizen of the United States, a resident of Haverhill, in the county of Essex and State fi of Massachusetts, have invented an -Improvement fin Heel-Blank -Breast-Shaping Machines, of which the following is a specification. 1

This inventionrelates to machines which are primarily designed to shape the breast surface of wood heels and more particularly to those'of tlfe so called Cuban or military .7 u As-ordinarly shaped, a CubarW-heel has a breast surface which is concave transversely and straight longitudinally, or from top to base, and hasits sides tapering from basecto top and concaved longitudinally. It has been customary to shape the breast surf, face of such heels, when made of leather, after attachment, with an arc-shaped reciprocating knife,and, when made of wood, to breast shape them, before attachment, with arotary cutter having arc-shaped cutting edges, the'Jh'eel, in the latter instance being moved'in a straight path pastthe cutter. When the breast and sides of a heel are formed as above described, the deeper inter 3 mediate portion of the sides intersect differ '30 ent longitudinal elements of the breast surface than do the side portions nearer the top and bottom, and, as a result, the sides terminate in lines which are concave when viewed from either side. It' is considered that when the sides of the heel terminate at the breast in a'concave or inwardly curved line, asv viewed from either side, the heel is objectionable in appearance and the trade demands that this line should be straight in 40 side view- Consequently it has been the practice, in the manufacture of shoes, having leather heels of the Cuban type, to straighten the side breast edge with a hand knife by shaving down theedge at top and base. While j the result thus secured is imperfect and may beimperfectly secured on a wood heel in a similar way, as by a scouring operation, the increased labor cost is-an important objection. w 1 The primary object of my inventionis to provide a" machine which will so shape the breast surface'without increasing the expense of the breastshaping operatiomthat 1924. Serial 110,713,465;

when the heel is turned, or its side surfaces are forined, in a side view of the heel, its sides will appear to terminate at the breast in a straight line. Other objects of my invention-are to improve prior machines for performing the breast shaping operation on wood heels, so that the work may be more easily rapidly performed, and to produce a machine which is adapted to be readily adjusted to form heels of various shapes.

I accomplish these objects by providing a machine having means for moving the heel blank with relation to the rotary cutter in a path which will cause the formation of a breast surface which is sufficiently convex longitudinally to neutralize the effect of the concavity of the side surface to such an, ex-

Ttentthat the sideswill appear to terminate ina straight edge when viewed from either side. More specifically stated, I accomplish thisobjec't by moving the heel blank longitudinally in a curved path-with relation to the breast shaping cutter, so that the angle at which the blank is presented-to the cutter is constantly changed as it is moved past the cutter and a breast surface is produced which is sufliciently convex longitudinally to enable the desired result to be secured. As a practical matter, I haveascertained that sufficiently accurate results to satisfy the eye are secured if the heel blank is swung longitudinally of its height about a fixed axis which is disposed transversely thereto,

and in this connection I provide means whereby the radius of the path, of move-. ment may be varied in length and the position in which the blank is held with relation to said path, may be varied in inclination according to the particular style heel to be formed.

For a detailed description of a preferred embodiment of my invention, reference is made to the accompanying drawing, .in connection with the following specification, in Which:-

Fig. 1 is a plan view, and Fig. 2 is a side elevation of a machine embodying my invention.

3 is an elevation of the front end of the work holder. s

Fig; 4 is a detail view of the base clamp member and its adjusting. means.

Fig. 5 isa detail view of the top clamp member.

blades.

Fig. -8 is a detail view of the jack post.

Fig. 9 is a side view of a heel blank at the end of the brasting operation.

Figs. 10 and 11- are side and front views of the finished blank.

Fig. 12 is a plan view illustrating a modified embodiment of the invention and Figs. 13 and 14 are end and side views of the cutter employed in connection therewith. According to my invention the main frame of the machine comprises an upright base 1 having a horizontal fiat surfaced table 2 on the upper end thereof. A cutter. shaft 3 is mounted to rotate about a vertical axis in a bearing 4 which is mounted on a vertically ad'ustable slide 5, the particular means for a justing which may comprise a screw 6 and hand wheel 7 A cutter 8, having blades 9 mounted therein, is secured on the upper end of the shaft 3, the cutting edges of said blades being made in various shapes, oneof which is indicated in Fig. 7 A hood 10 is preferably provided on the bed over the cutter for carrying away chips and dust. I The heel blank carrier comprises a carrier plate 11, having a flat under side which is adapted to rest directly on the upper surface of the table 2 and to swing thereon about a pivot pin 12 which is adapted to be placed in any one of a series of apertures 13 in thetable 2 and in a corresponding series of apertures 14 in the carrier plate 11. The apertures 13 in the table are all so arranged that their centers lie in the same straight line, which lineintersects the axis of the cutter shaft 3, and the apertures 14 are all arranged with their centers in a straight line and are spaced identically to the aperture 13, so that, when their lines of centers coincide, the apertures 13, 14 coincide respectively. The pivot pin 12 may be placed in any two corresponding apertures, so that the carrier plate 11 may, without variation of its position with relation to the cutter, be swung about centers varying in distance from the cutter, and its front end may thus be made to describe arcs of different curvature, all of which are tangent to an are, central at the axis of the cutter shaft, at the point at which the line of centers of the apertures 13 intersect said arc. A jack or heel blank holding clamp is mounted horizontally on said carrier plate 11 and comprises a base member 15,

having a vertically disposed heel blank en-- gaging face 16, said member'being pivotally connected to the plate 11 by a. pivot bolt 17 in-as closeproximity to the end of. the face. :16 next the cutter as-practicable. This arrangement permits adjustment of' the base member to various angles, according to the desired angular relation of the breast surface. to the heel base on the blank to be operated on. For convenience in adjusting the machine for any particular shape of heel, a scale of degrees 18 is formed on the carrier plate 11, which cooperates with an indicating mark 19 on the base member, to indicate the number of degrees wlnch the breast surface is to be inclined forwardly from a perpendicular to the base surface of the blank. Suitable means are provided for clamping the base member 15 .in any position to which it may be adjusted, the means shown consisting of arc-shaped slots 20'and 21 in the member and bolts22 and23 which pass therethrough and are threaded in the plate 11, whereby the member 15 may be securely clamped to the plate. A pair of handles 24, 25 aremounted in the base member 15 and a single handle 26 in the plate 11 by means of which the operator may swing the same in operating the machine.

The top clamp member is similar in its main features to the construction shown in Pool Patent #1,238,814, the entire member being mounted on a post 27 which is slidably mounted on the base member 15. As shown in Fig. 8, the post is bifurcated at each end, the portions 27'? and 27 thereof being respectively arranged above and beneath the base member 15 and slidable in guide ways formed therein. A screw 28 is providedfor adjusting the post 27 in its guide ways and set screws 29 are provided in the portion 27 for locking the post in adjusted position. The member 30, for engaging the top end of the blank, is adapted to be operated by the hand lever 31 to clamp and unclanip the heel blank in a lnanner similar to that disclosed in said prior patent to Pool, the particular mechanism which I preferably employ being shown in detail in Fig. 5, and any substantial changes from the construction disclosed in said Pool patent ponstituting no part of the present invenlon.

A back gage 32 is provided on the member 15 which is arranged to be adjusted by a IPO thumb screw 33 swiveled in the member 15, I

and a removable rest plate 34 is mounted on the carrier 11 to serve as a. side gage and to support the blank in position until it is clamped. Several plates similar to plate 31, but varying in thickness, are provided, so that blanks of varying width may be prop- ,erly positioned in middle position onv the be placed in position on the face 16 and,

carried into the path of the cutter blades as the carrier 11 is swung from the position of Fig. 1, in which position the blank carrier is held when the blank is placed in position and clamped about the pivot pin 12, which will be located in corresponding holes 13, 14. In performing the grooving operation, the operator usually places his hands on two of the handles 24, 25 or 26, according to the position of the pivot on which. the carrier swings, and pushes'the carrier so that its end swings past the cutter, carrying the blank into engagen'ient with the cutter and past the same, so that the blank will be grooved from base to top. It will be noted that the heel blankduring this operation,

is moved longitudinally or endwise in a circular, horizontal path, past a cutter which is rotating about a fixed vertical axis, said cutter having the'cutting edges of its blades convcxly curved, so that a transversely concave groove will beformed in the blank, the curvature of which may be either circular orsomewhat elliptical, and also that the surface which is formed will be convex longitudinally, the extent of the convexity depending on the length of radius of the path in which the blank is carried, the less the radius, the greater the convexity, this being determined by the position of the pivot pin 12. As the longitudinal convexity of the breast surface corresponds to the arc of a circle, the highest points of said surface, considered with relation to the correspond ing points'at each end, will be midway of said surface. hen the heel is turned and longitudinally concave sides are formed thereon, the points of greatest depth, considered with relation to the top and bottom of the blank, will also, in most instances, be at the middle of the heel, so that it may be considered that, as a general rule, the surface elements through the highest points of con- .vexity on the breast are intersected by the surface elements through the points of greatest concavity on the sides and that the elements through the corresponding intermedi ate points of convexity and concavity also intersect, with the result that if the extent of the convexity is in proper proportion to the extent of the concavity, the line of intersection will be straight, as viewed from the side. For example, if the curvature at each side corresponds to the arc of a circle and the convex formation on the breast is formed on arcs of the same radius the lines of intersection at each side will be straight when viewed from either side or will lie in the same plane surface.

When a heel block is grooved on the above described machine, and the block has not been sawed so that its sides taper, but are parallel, the edges formed where the cutter emerges at each side will be concentric with the curvature at the middle of the groove, as shown in Fig. 9, but if the sides of the block have been sawed tapering, the edge curve will converge to an extent with the bottom curvature, but whether the surplus wood is removed by saws or the cutter does noteffect the final result, secured by the turning operation, which is shown in Fig. 10.

WVhile movement of the heel blank holder in the arc of a circle, as it carries the blank past the cutter will give sufliciently accurate results in nearly, all instances, it is entirely within the spirit of my invention to vary this path of movement if conditions should require it, as might readily be done by a suitable cam action. An example of an instance where such variation might be desirable would occur where the concavity of the side was deepest at a point midway between the middle and the top, but in practice a comparatively slight variation of the deepest point in the side from the middle does not noticeably affect the result, and a variation of the position of the pivot pin 12, in the corresponding series of holes 13 .and 14, according to the radius of curvature of the side which is later to be formed when the blank is turned, is ordinarily sufficient to secure satisfactory-results.

In adjusting the machine, the two main factors requiredare the angular relation of the breast surface to the base and the radius, or approximate radius of curvature of the side to be formed, corresponding ad justment of the base member 15 on the pivot 17 being made according to said angular relation of base and breast and adjustment of the pivot pin 12 being made according to the side curvature.

It is to be noted, in this connection, that, under all conditions, the angle between the base surface and the breast surface to be formed is obtuse, and that the base engaging face of the lamp is, in all positions of adjustment, disposed in oblique relation to the radius about which the heel holder swings, the extent of this obliquity being varied by adjustment about the pivot 17.

Other adjustments according to the. length and width of base and-height of the blank will be made in a manner which will be obvious.

In Figs. 12, 13 and 14 I have illustrated an embodiment'of my invention in connection with a difierent form of cutter, said form being generally known as a barrel saw, which comprises a hollow cylinder having saw teeth 41 on its end and internal material removing blades 42 within said teeth. In this connection the parts will be so arranged that the plane of the ends of the saw teeth is identical with the vertical plane of the line of centers of the apertures 13 in the table. With this form of cutter the transverse curvature of the breast groove will conform to the arc of a circle of the same diameter as that of the cylindrical saw. The operation with this type of cutter is practically identical to that previously described with relation to the other type of cutter, and it is thought to be unnecessary to describe it.

I claim 1. A. machine for shaping the breast side of a heel blank comprising arotary cutter having its cutting edges movable in a circular path and adapted to form a transversely concave groove, a heel blank holder movable in a curved path and having means ,to hold the blank with its base end at a predetermined angle to said path and in position to be carried longitudinally past the cutter with its base end at an oblique angle to the path in which it is moved, to form a groove in one side of the blank from end to end having a predetermined longitudinal convexity and an obtuse angularity to its base end. i

2. A machine for shaping the breast side of a heel blank comprising a rotary cutter having its cutting edges movable in a circular path and adapted to form 'a trans versely concave groove, a heel-blank holder movable in a circular path oppositely d1sposed to the cutter path and having its blank holding means arranged to carry a heel blank held there by past said cutter in position to groove the same from end to end while its base end is held in oblique relation to a radius of said path.

3. A machine for shaping the breast side of a heel blank comprising a rotary cutter having its cutting edges movable in a circular path and adapted to form a transversely concave groove, a heel blank holder arranged to hold the blank with its base end in predetermined angular relation to said path and having means to vary the angular position thereof with relation thereto, means to move said holder in a curved path to carry the blank past the cutter in position to groove its breast side from end to end there of and to constantly vary the angular relation of its base end with relation to the path of said cutting edges as it is moved, to cause the bottom of the groove to have a predetermined convexity.

4. A machine for shaping the breast side of a heel blank comprising a rotary cutter having its cutting edges movable in a cir-' cular path and adapted to form a trans versely concave groove, a heel blank holder having a fixed support and a pivotal connection therewith outside said path arranged to cause the holder to carry the blank past the cutter andgroove the breast side thereof from end to end, thereby to give the bottom of the groove a longitudinal convexity, means whereby the radius of the thereon to swing in a curved path, a blank I holder mounted on said carrier in position, to carry the blank longitudinally in engagement with the cutter, as the carrier is swung on said support and to present the blank to the cutter at constantly varying angles as it is moved past the same and means to vary the inclination of said holder on the carrier to vary the initial angle of presentation of the blank to the cutter.

6. A heel-blank, breast-shaping machine comprising a rotary cutter having its cutting edges movable in a circular path and adapted to form a transversely concave breast surface on the blank when the blank is moved longitudinally in engagement therewith, a support, a carrier mounted thereon to swing in a curved path, a blankholder mounted on said carrier in position to carry the blank longitudinally in engagement with the cutter, as the carrier is swung on said support and to present the blank to the cutter at constantly varying angles as it is moved past the same and means to vary the inclination of said holder on the carrier to vary the initial angle of presentation of the blank to the cutter, said means including a pivotal connection. between the holder and carrier. adjacent the outer periphery of the path of the holder.

7. A heel-blank, breast-shaping machine comprising a support, a carrier pivotally mounted thereon to swing horizontally, a blank-holder pivotally connected to said carrier in position to carry the blank longitudinally as the carrier is swung on its pivot, and to permit horizontal swinging adjustment of the holder on the carrier to vary the inclination of the blank to its path of movement, means to vary the position of the. pivotal connection between said carrier and support to vary the length of the radius of the path in which said holder is moved, and

a rotary cutter arranged to operate on a blank in said holder as said carrier is swung on its pivot, to form a transversely concave, longitudinally convex breast surface on the blank.

- 8. A heel-blank, breast-shaping machine comprising a support, a carrier pivotally mounted thereon to. swing horizontally, a blank-holder on said carrier having clamping members for respectively engaging the top and base of a heel-blank arranged with their faces in vertically disposed positions, a Vertically disposed pivot connecting said holder and carrier having its axial line in proximity to the breast end of the face. of said base engaging member, means permitting adjustment of said holder about itspivot to vary the angular position of said faces with relation to the path in which they are moved, and a rotary cutter arranged to operate on a blank in said holder as said carrier is swung on its pivot.

9. A heel-blank, breast-shaping machine comprising a cutter mounted to rotate about a vertical axis and having horizontally projecting grooving blades, a table having a horizontally disposed supporting face, a carrier mounted toswing horizontally on said face, and having means for pivotall connecting the same to said table at different distances from said cutter axis when the carrier is held in a predetermined position with relation to said axis, a heel-blank holding clamp mounted on said carrier with its clamping faces 1n vertically disposed positions and in position to present a blank held thereby to the cutter as the carrier is swung on its pivot in any one of its pivotal positions and means for adjusting said clamp on saidcarrier to vary the angular position of its said vfaces.

In testimony whereof, name to this specification.

HARLEY W. RUSS.

I have signed my

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