US2314660A - Shaper - Google Patents

Description

March 23, 1943.I E, B, PETERMAN 2,314,660

SHAPER Filed Sept. 6, 1941 Snventor Gtforneg Patented Mar. 23, 1943 UNITED ASTATES PATENT OFFICE sHAPER v Earl B. Peterman, Canfield, Ohio Applieetieri september s, 1941, serial No'. 409,869

1 Claim.

A still further object of the invention is a provision of a fiber wedge cutting device wherein a relatively small motor forms a suiiiciently strong power source to operate the device due to the unique arrangement of the ber engaging tools.

The fiber wedge cutting device shown and described herein has been designed to facilitate the formation of insulating fiber wedge members, a great number of which are used in the rebuilding of armatures of electric motors and generators.

As is known in the art, these ber wedges are necessarily beveled on their edges in order to conform to the structural shape of the positions they occupy in the armatures. Heretofore, it has been necessary to shape the fiber wedges on such means as were commonly available for the work and which means often comprised grinding stones, planing devices, and similar machines not adapted for the accurate work necessary.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein:

Figure 1 is a top plan view of the fiber wedge cutting device.

Figure 2 is a side elevation with parts in crosssection showing the fiber wedge cutting device,

By referring to the drawing and to Figure 2 in particular, it will be seen that a table I0 is provided with a cylindrical structure depending therefrom and has rotatably positioned centrally therein aspindle I2 adapted to carry upon an upper-most lend thereof by reason of a shoulder I3, a pair of head members I4 and I5 each of which is provided with a pair `of oppostely dis-L posed channels I6 andII respectively, which channels are adapted to form means for the retention of conventionally shaped portions of standard tool stock such as is, for example, commonly available in square shape of Varying lengths, two pieces of such stock being indicated.

in the drawing bythe numerals I8 and ISwhich pieces of tool stock are provided at their outermost ends with suitably shaped knifelike edges 20 and 2I respectively, which edges are tapered as best shown in Figure 2 and which tapers are oppositely formed.

In order that the tools I8 and I9, formed of tool stock, may be held in desirable position in the opposed channels I6 and I1 of the head members I4 and I5, a washer 22 and nut 23 are turned upon a threaded upper-most end 24 of the spindle I2, the nut 23 adapted to exert sufcient pressure upon the heads I4 and I5 to retain the tools I8 and I9 in operative position. This is due primarily to the formationof the channels I6 and I'I which are so formed as to provide a tight fit about the tools I8 and I9.

By referring now to Figure 1 of the drawing, the preferred arrangement of these tools I8 and I9 may be seen as the inner-most ends thereof are shown in dotted lines beneath the head member I4. Still referring to Figure 1, it will be seen that a relatively long striplike section of fiber forming a fiber wedge 25 is positioned horizontally across the opening II in the table I0 in a position wherein it is adapted to be engaged by the cutting edges 28 and 2I of the tools I8 and I9 alternately upon the upper and lower surfaces thereof so as to form a beveled edge thereon as illustrated in the drawing. In order to retain the liber wedge 25 in position and at the same time provide for its being moved endwise so as to progressively bevel the edge of the strip, a spring tensioned clamping piece 26 has been provided which clamping piece 26 is formed with a channel like portion 26A which in turn is adapted to be snugly positioned over a barlike member 2l and movably held thereon by means of a pair of spring tensioned members each of which comprise a spring 28 and a headed shaft 29 which is in turn aflixed to the barlike member 21 and passes through an opening in the inverted channel member 26A. The fiber wedge engaging portion 26 is provided with a radius 38 formed therein to facilitate the inspection of the work and its necessary endwise movement as the work progresses- The barlike member 2'I forms a portion of a movable plate 3| which is in turn adjustably positioned on the table l0 by means of bolts 32 engaging slots formed therein.

It will thus be seen that a long strip cf fiber may be placed under the clamping piece 26 and thus held in proximity to the arc of the tools I8 and I9 which will upon the rotation of the spindle I2 cause a practical and eicient beveling of the edge of the ber wedge 25 thus exposed to their action. It will be seen that by moving ber Wedge 25 endwise, the beveling action is continued and that it is thereby .possible to bevel an edge of the fiber wedge rapidly and efficiently and that when one edge has been so beveled, the wedge 25 can s be removed and reversed so that the other edge may also be beveled. After being beveled the fiber wedge strip is cut to desired lengths. The tools I8 and I9 may obviously be ground by hand or on an emery wheel, no special grinding equipment being necessary, thus assuring lower maintenance cost. As there are no milling cutters used the complete ber wedge cutting device forms an economical unit and one which may be readily adjusted to creating the same taper on the Wedges as the original bers which are being replaced.

yIn some generators wooden wedges are used and it is obvious that the device will efficiently form the same. It will be seen that the head members I4 and l 5 are extremely simple in formation and that they can be used either side up when they are assembled. It will be seen that the square cornered channels IB and IT formed in the head members I4 and I5 may be easily and accurately formed as they do not depend upon complicated formation or pattern to be effective in adequately holding the cutting tools.

It will also be seen that due to the fact that only one cutting tool engages the work at one time a much smaller motor can be used thus adding to the eiciency and economy of the de- VICE.

Having thus described my invention, what I claim is:

In a device of the class described comprising a table having an opening formed therein and means adjacent the opening adapted to retain a fiber strip in position adjacent the said opening, a revolvable shaper positioned partially within the said opening, said shaper comprising a pair of head members having oppositely disposed channels formed therein and work engaging tools positioned in the said channels each of the said work engaging tools projecting from opposite sides of the said channels and each of the said work engaging vtools beveled in oppositely disposed bevels so that the ber strip may be engaged alternately upon upper and lower surfaces thereof by the said Work engaging tools.

EARL B. PETERMAN.

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