US1493630A - Grinder - Google Patents

Description

may w 1924s. A mams@ D. A. HARNER ET AL GRINDER Filed Sab, 19.. 1923 22 32 20 mulnmlmi 24 ullllllllllm 4 I J. JY Ostergardfy atto: nu

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Patented May 13, 1924,

UNITED f STATES PATENT oFFicE.

DAVID A. HARNER AN'IDJU'LIUS N. OSTERGARD, OF CEDAR FALLS, IOWA.

GRINDER.

Application led February 19, 1923. Serial No. 619,956.

To u- 2li/10m if may con-cern.:

Be it known that we, DAvin A. HARNER and JULIUs Omnitel-um, citizens of the United States of America, and residents of Cedar Falls, Blackhawk County, Iowa, have invented certain new and useful Improvements in Grinders, of which the following is a specification. 1

Our invention relates to improvements in grinders, and the object of our improvements is to provide a simple, inexpensive and easily operated rotary grinder, having several adjustments between its relatively movable parts.

This object we have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1 is a side elevation of our grinder, with parts broken away or shown in longitudinal section. Fi 2 is a front elevation, and Fig. 3 a top p an thereof.

The device shown is of a small, simple and light type, suitable for use by barbers and others in sharpening shears and scissors or other small articles, or in grinding same,` and minor variations in its parts are covered by the invention.

The numeral 1 denotes a discoidal grinder made of any suitable abrasive material, and preferably having its forward angle removed frustally at 2. This disk 1 is xedly mounted coaxially upon a rotatable shaft 3 which is rotatably mounted in the cylindrical bore 8 of a horizontally elongated bearing-body 5. This body 5 has a rigid depending stem 19, short and cylindrical, and which 1s mounted to rock horizontally in a socket 20 in the upper part of a clampingbody 23. In order to adjustably secure said stem in said socket, a set-screw 22 moves in a threaded hole 21 in said clamping-body to terminally engage the stem. The clampingbody 23 has parallel projecting members provided with facing disks or tubular parts 24 and 25. The lower part 25 is centrally orificed and threaded to receive an adjusting screw 26 which has a pivoted head 27, so that a supporting body 28 may be clamped between the parts 24 and 27.

The rear part ofthe shaft 3 within the bore 8 is provided with a V-shaped annular groove 6 to receive the lower wedge-shaped end of a in 18 seated in a vertical hole in said bearing-body 5 to project upwardly a short distance therefrom. This projecting extremity has a diminished tip 17 which is passed through a hole in the free end of a late-spring 16. The spring is positioned along a flattened portion of the bearing body and has its other end secured to the bearingbody by means of a screw 15, and the free end of the spring bears downwardly under a desired amount of tension against the annular shoulder below the tip 17 on the pin 18, whereby the pin serves as a/stop to prevent longitudinal displacements of said shaft, but the contact being loose does not bind the shaft.

Immediately to the rear of the groove 6 the shaft end is diminished in diameter and provided with a longitudinal slot 10 opening to the rear to receive and be engaged by a projection 9 on a diminished end 11 of a cylindrical head 12 on a flexible power shaft 13, the latter adapted to be driven by any suitable motor not shown. A screw 14 is mounted in a threaded hole in the rear end of said bearing-body and may be moved downwardly enough to pass behind the Vshoulder of the enlarged shaft-head 12 to keep the latter in engagement with the other shaft 3. A

The numeral 29 denotes a fiat split-ring mounted to be clam ed for rocking adjustment upon a diminis ed part of the forward end of the bearing-body 5, said ring having at its split outwardly directed ends 42 provided with alined holes, the lowermost threaded to take the screw 41, so that when the screw is loosened the position of the ring may be changed by rocking it upon its support to vary the angular position ofthe arm 30 which projects from the ring about oppositely to said parts 42.

Another arm 33, of curved shape, has its disked end 31 secured to the end of the arm 30 by means of a screw 32, whereby when the screw is loosened the arm 33 may be adjustably swung to a desired adjusted position, the screw being tightened to hold the arm rigid. The outer end of the arm 33 is flattened at 34 and has a longitudinal slot 35.

A supporting element or block 37 has a longitudinall slot 38 and may be positioned upon the arm part 34to have parts of the slots 35 and 38 alined to permit a screw-bolt 36 being passed therethrough and secured with the block 37 in an adjusted position by means of a wing-nut 39. The upper end of the block 37 is bent over angularly at 40 to provide a tubular support upon which to restan article, such as shears to be operated upon by the grinding disk 1. It will be seen that the grinding may be effected with great facility, because of the several adjustments erlnitted in the parts of the device, Wheregy the bearing-body may as a whole be rocked horizontally at 19, and secured, and the tubular part 40 positioned at any desired angle relative t the disk 1 or at different distances therefrom, because of the adjustable ring-clamp 29, and the adjustable jointed members 83-34 and 37. The bevel edges of shear members may be ground to desired angles of inclinations as required for differing uses in cutting various materials. The part 40 allows such an article to be supported slidingly thereupon or be presented to the disk 1 at changed directions.

The shaft 3 may be coupled releasably to the flexible shaft of a motor, such as those often found in barber or other shops or places, by the engaging-means shown.

Having described our invention, What we claim as new, and desire to secure by Letters Patent, is:

1. A grinding device, comprising a bearing-body, a shaft mounted rotatably in said bearing-body, having an abrading head secured on one end and having an annular groove therearound Within the bearing body, said bearing-body being apertured and a pin slidably mounted in the aperture to extend into said annular groove, resilient means bearing upon the outerend of said pin adj ustably, and a Work-holder bracketed adjustably upon said bearing-body.

2. A Grinding device, comprising a clamplng-devlce, a bearing-body rockingly mounted thereon, means for securing the bearingbody to the clamping-device in a desired position of relative adjustment, a shaft rotatably mounted in said bearing-body and having an abrading head on one end, a jointed work-holder bracketed adjustably 'upon said bearing-body, means for holding the Work-holder in an adjusted position upon the bearing-body, elementsv of the jointed Work-holder being slidably connected, and securing-means for holding said slidably-connected elements in adjustment relative to the abrading head.

Signed at 'Waterloo, Iowa, this 17th day of J an., 1923.

DAVID A. HARNER. JULUS N. OSTERGARD.

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