US1161860A - Skiving-machine. - Google Patents

Description

F. L. HARMON.

SKIVING MACHINE.

Q APPLICATION FILED MAR. 9. 19H. 1,161,860. Patented Nov. 30, 1915.

2 SHEETS-SH T I.

W/ZWfSSESL F. L. HARMON.

SKIVING MACHINE.

, APPLICATION FILED MAR. 9. I9II- 1,161,860. Patented Nov. 30, 1915.

2 SHEETS-SHEET 2- and shoulder. Hitherto the angle of the skive has been varied by. adjustingsome part of the machine, for example the knife,

UNITED STATES PATENT oEEIoE.

FRANK L. HARMON, 0 BEVEEIQYQMAssAoEUsET'rs, AssIeNoE 'ro UNITED SHOE MACHINERY COMPANY, or rA'rEasolv, NEW JERSEY, A CORPORATION or NEW JERSEY.

drawings indicating like parts in the several figures.

This invention relates to skiving machines a and. is herein shown as embodied in a machine of the type disclosed in United States Patent No. 726,285wl1ich was-granted to me on April 28, 1903. I

In practice it is required, in order to meet various conditions, that means be provided for varying the width, angle and character of the skive produced on the stock, these skives being commonly known'as straight while the change from a straight to a shoulder skive or vice versa has necessitated the replacement of the feed roll by another roll of the propercontoun, Inthe present invention such adjustments and replacements are done away with by providing,

v; with a feed roll which is yieldable bodily and angularly, a plurality of interchangeable presser feet the working faces of which are formed to produce the various types of skives. These presser feet are adapted to be readily attached and detached, and are care- I fully fitted and adjusted to the machine in thes'hop' where the machines are {manufactured so that thereafter when said machines v are in use no skill on the part of the operator is required tochange from one type of skive to another;

Another object of this invention consists in the provision with a combined stock supporting and roll supporting member, of

means for producing relative movementibetween the knife and said member and preferably the edge gage and presser foot are also mounted upon this member. In the illustrated embodiment the supporting member is made adjustable so that whenthe knife becomes worn the single adjustment of this member brings the roll and knife intosproper relative position, withoutv necesclaims. g Referring to the accompanyingdrawings, Figure 1 is a side elevation;'F1g. 21s a sec;

table, Fig? SKIVING-MACI-IINE.

sitating any adjustment of the edge gage or presser foot. i It is desirable that the forward portion of theedge gage be maintained in closeproximity to the knife edge. Whena knifehavmg a circular outline is used, however, lateral adjustment of the edge gage increases the space between said gage and said quired to bring said gage up to proper posi- ;tion.

Inorder to overcome this disadvantage a furtherobjectof this invention consists in knife so that a second adjustment is re the provisionwith aknife having a circular..-

outline of an edge gage which when adjusted is compelled to move in a curved path 'corresp ondingto the curve of. the knife edge. With this construction the distance between the edge gageiand the knife edge remains the same whatever the lateral position of saidgage. v i In machineswherein'the contour of the presser foot or its angularadjustment determines the contour of the skive it sometimeshappens that the stock buckles between thepresser foot and the knifeandfis notproperly smoothed out. Or it may be that although no buckling occurs the stock is not fed with the desired speed.

Accordingly another object ofthis inventionconsistsin the provision 'of a spring pressed auxiliary roll to cooperate with the 1 feed froll andv preferably this auxiliary roll is positively driven, ard the tension of the spring which presses it against the stock maybe varied. VVith this construction the rate of feed may be controlled and the leather smoothed out as it is fed to the knife.

These and other features of the invention including certain details of construction and combinations of parts will be explained, in

connection with thefollowing' description of a machine. and will be pointed out inthe tion on the line 2-2 of Fig. 3; Fig. '3 is a section on line 33 of Fig. 2; 4 is a. perspective. of the feeding and cutting mech-' anism taken from above the supporting table ,Fig. 5 is. a perspective of the feed roll and its mounting taken I from below said 6 is a perspective of a presser use the operator in order to producea skive of the angle or character desired has only to select the proper presser foot and lock said foot in place by means of the handle 75.

In Fig. 6 another presser foot 195 is shown, said foot being detached from the machine; and it should be noted that the working face 197 difiers from that of the foot 72. This presser foot is providedwith a set screw 199 which has been properly adjusted so that the foot is ready to be clamped in place when desired. j r

In machines of this class it is usual to provide an edge gageto guide the edge of the stock as it is being skived, andcommonly these gages are made adjustable; in astraight line. In the presentinvention, however,the

edge gage is so mounted that as itis adjusted itmoves in a curved path, its forward end thus following the contour of the edge of the knife. The construction by which .this is accomplished in the illustrated embodiment is as follows :Slidably mounted upon the yoke 43 is a member 87 having a straight slot 89; and pivoted at 92 upon said member is a second member 91 having a curved slot 93. In order to hold said members in adjusted positiona' clampingmember 95 is provided, said member being enga'ged by a thumb-screw 97. The edge-gage 99. is

shown as'formed integral with the-member 91. The shank of thethumb-screw 97 passes through a bore in the yoke 413 its axis being thus stationary with respect to the gage; and the pivot 92 holds the members 91 and 87 so that they are compelled to move together when one is adjusted. It will now be clear that, when the thumb-screw 97, qis loosened and the member 87 moved longitudinally, the member 91' because of its curved slot 93 and: its pivotal connection 92 will be moved in a curved path and will, carry with it the edge gage 99. The form of this edge gage is best shown in Fig. wherein it-will be seen that the end of said gage is cut away to fit the presser foot/1'2 and that the innermost portion of, said gage extends beneath said foot in close proximity to the edge of the knife. With this construction and mounting of the gageit will be clear that in all its positions its end is automatically kept close to the edge of the knife. s

Turning now to the mechanism for driving the feed roll the driving sleeve a9 is supported in a block 101 fastened by screws, not shown, to the'table 15, and said sleeve is held from longitudinal movement with respect to said block by means of a yoke 105 fitting; in a groove in said sleeve and held fast to saidblock by a screw107. This sleeve 4:9. is formed at one end with a gear 111, and this gear meshes with an idle gear v 113 which rotates upon a stud 115 carried by the frame. Meshing with the idler ll3'is as shown.

counter shaftis driven from the worm 5 by means of a gear 123 The gears 111 and 113 are. so arranged that when the table 15 is adjusted the gear 111 may roll on the gear a second idler 117 also carried by the frame, said second idler being driven from a gear 119 fast upon a counter-shaft 121; and this 118, no adjustment of any of the gears between the worm 5 and the feed roll being necessary.v i l 1 Q The knife 125-, ofthe rotary type, is pro- "ided with a circular opening at its center .which fits over a cylindrical extension of the enlarged upper end of the shaft 3 and is clamped to said enlargement bya screw 127; and in order to insure'that said knife shall beheld from turning with respect to said shaft, apin 129 fixed in the enlarged end of said shaft extends up through a suit able hole insaid knife. The knife shaft rotates at a high speed, and in order to provide continuous and eflicient lubrication a pocket 133 isformed in the upper part of the frame, and said pocket is packed withan absorbent material 185such as felt. Access to"this pocketispermitted by a shallow channel which is out in the uppersurface able means. t

In order to fe d rapidly and uniformly to the machine an auxiliary vfeeding mechanism is provided. Fast to 3 the sleeve 19 which drives the feed roll is a roll 137, and ooiiperating insurethat the' 'work shall be I with said roll 137 is" an auxiliary roll 139.:

This auxiliary rolllis carried by a flexible shaft 141. One end of this shaft is journaled in a block 143 which is fast to the table 15 while the other end is journaled in a block-14:5 which is shown as integral-with a spring arm 1 17. In order that the. tensionf 'of this spring arm may be varied said arm rests upon a wedge shaped piece 149, a

vscrew 151 passing through said arm and piece and holding them fast to the block 1 18 A thumb-screw 153 also passes through these members and into the block,

said screw being located near the thinner 12o end of the wedgeshaped piece 149. A set. screw 155, provided witha lock nut 157, is

threaded through saidspring arm and abuts Y the upper surface of the block 1418. lVith this construction and arrangement of parts the tension of the spring arm may bevaried by turning the thumb-screw 153, and by adjusting the set screw 155 the position of the roll 139 and hence the distance between that roll and the roll. 137, maybe varied. The.

said carrier being cut away between said bearings to provide space for the pulley 165 fast on the grinder shaft. 1 lower bearings of the carrier are connected The upper and by a member 167 which is hollow to provide an oil reservoir, a cap 169-cl'osing the upper shaft 171 which is rotatable in bearings in 1 the frame.

end thereof. This carrier 163 is fast to a Fast to the opposite-end of this shaft is an arm'l73, and threaded through this arm is an adjusting screw 175-, said screw being mounted in a lug 17 7 extending horizontally from anflupright boss 179, a pair of collars on said screw holding it fro-m longitudinal movement. The bearings for the grinder shaft are provided with oil wells packed withfeltsimil'a-r to that provided for fthe knife shaft. The "oil hole for the upper bearing isjclose'd bya knurledring181, while that-for the 'lowerbearing', as has been stated is closed by the cap 169.- It should be noted that the pulley 165 of the grinder shaftfis solocated that itiis driven from -th'e belt 11 V which also drives the knife and the feeding mechanism. In order to remove any bur which may be formed on the under side of the knife" edge "an auxiliary stationary grinder 183 is carried by the table. 7

' table;

The flexible shaft 14 1is driven fromthe shaft 121 by means offpulleys'185 and 187 and a belt 189. In brder to keep said belt I; I40

tight a tightener p'ulley'191 is mounted on a stud which "is carried'by an adjustable bracket fastened to the under side of the With thisconstructionthe belt 189 may always be kept tightened whatever may bethe adjusted position of the table.

In operation the stock is placed on the supporting table and fed to the rolls. 'The rigid presser foot forces the feed roll to yield bodily and angularly so that the stock is presented to the knife in a manner dependent upon the contour of the working face of said presser foot. The stock passes over, the knife while the skivings pass beneath the knife and are directed away from theworking parts by the chute 131. When it is desired'to change the character of the skiye the presser' foot is replaced by one liaVing a working faceof proper contour.

Although the IIIVGHtlC-Il has been set forth I inrconnection with a particular machine it should "be understood that nothing herein containe'dis to be construed as limiting the invention in the scopeof its application to the particular machine shown and described. 'Having thus described the invention what igieaseo Iclaim and desiie to secure by Letters Patentis:-'

'1. machine of'the class described having, in combination, a shaft, a knife fixed to the upper end thereof, means for rotating said shaft, a feed roll, and a'train of gears connecting said roll and shaft whereby-said roll is driven fromsaid shaft, said train comprising a "gear held to rotate with said roll and an adjacent gear, said gears being placed one above'the other whereby the feed roll may be horizontally adjusted while maintaining the'mesh of said gears. V

2.. A machine of the class described having, incombinat-io-n', a shaft, a knife mounted said shaft and roll, means for yieldingly supporting said roll against movement toward "and from said knife and I against angular movement with respect to sa1d knife, and

' a rigidly held presser foot whereby thecontour of the a'cting'face of saidfoot determines the character of the skive produced.

- 3; A machine of the class described hav-' ing, in'combination, a knife, a feed roll, a supporting member carrying sa1d roll, sa1d member -being adjustable toward and from saldknife, means forjactuati-ng sa1d knife and roll',*said roll being yieldingly mounted 1 to accommodate different thicknesses of stock and different angles of bevel, and a rigidly held presser foot.

- 4}. A machine of the class described having, in combination, a shaft, a knife mounted upon the upper end thereof, means for actuatingsaid shaft, a pivoted supporting block, a yielding member acting to rotate said block about its pivot, a yoke pivotally mounted in said block, a yielding member acting to rotate said yoke about its pivot, a feed roll mounted in said yoke, means includinga universal joint for actuating said roll, and a rigid presser foot.

5. A machine of theclass described having, in combination, a knife, means for 'actuating said knife, a feed roll, a longitudinal-ly adjustable member carrying said roll, said roll being bodily movable about an axis approximately parallel to its own and being also angularly movable about an axis at right angles to its own; said last named axis intersecting said roll at approximately its uppermost, innermost point, a rigidly held prlelsser foot, and means for actuating said r0 6. A machine of the class described having, in combination, a -knife having a circular outline, a feed roll, means for actuating said knife and roll, a presser foot, an adjustable edge gage, and means connected with said gage for automatically compelling the adjustment of'said gage to take place in a curved path corresponding to the curve of the knife edge.

7. A machine of the class described having, in combination, a knife, a feed roll, means for actuating said knife and roll, a presser foot, a longitudinally adjustable member having a Straight slot, a second adjustable member having a curved slot, a pivot connecting said members, a pin extending through both slots, said pin being held from movement in the direction of adj ustment of said members, and an edge gage carried by said second adjustable member.

8. A machine of the class described having, in combination, a knife, a yielding feed roll, an unyielding auxiliary roll coaxial with said feed roll, means for actuating said rolls and a spring pressed roll cooperating with said unyielding roll.

9. A machine of the class described having, in combination, a knife, a yielding feed roll, an unyielding auxiliary roll coaxial with said feed roll, means for actuating said rolls, a spring pressed roll cooperating with said unyielding roll and means for varying the pressure exerted by said spring-pressed roll.

10. A machine of the class described havof the knife, a feed roll and an auxiliary roll carried by said table, and means for actuat ing said rolls.

Copies of this patent maybe obtained for 11. A machineof the class described havmg, in comblnation, a knife, a feed roll, a pa1r of cooperating auxiliary rolls situated at one end of said feed roll, one of said auxt mounted on the upper end of said shaft,

means for actuatlng said knife, a supporting,

member, a carrier supported thereby, said carrier being mounted to yield bodily and angularly, a feed roll mounted in said carrler, an edge gage mounted on said carrier,

a rigid presser foot, and means for actuating said roll. I

13. A machine of the class described having, in combination, a rotary shaft, a knife fixed to theupper end thereof, a feed roll arranged to act upon the under side of the stock, means for actuating said roll from said knife shaft, and an auxiliary spring pressed roll arranged to act upon the upper 1 side of the stock. V

In testimony whereof I have signed my name'to this specificationin the presence of two subscribing witnesses.

FRANK L. HARMON'. Witnesses:

HERBERT W. KENWAY, ARTHUR L. RUSSELL.

five cents each, by addressing the Commissioner of Patents, Washington, D. 6.

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