US1726571A - Work support for cutlery-sharpening machines - Google Patents

Description

Sept. 3, 1929. H. e. KELLEY WORK SUPPORT FOR CUTLERY SHARPENING MACHINES Filed Feb. 1927 II run-FL gvmenloz Patented Sept. 3, 1929.

UNITED STATES HARRY G. KELLEY, OF PORTLAND, OREGON.

WORK SUPPORT FOR CUTLERY-SHARPENING MACHINES.

Application filed February 8, 1927. Serial No. 166,748.

This invention relates to a work support for cutlery sharpening machines of that type embodying an emery wheel having a peripheral and inclined lateral grinding faces, and

has for one of its objects to provide a device of this character which shall include a scissors rest associated with the peripheral grinding face and knife guides associated with the lateral grinding faces.

A further object of the invention is to provide a work support wherein the knife guides shall be adjustable to adapt them for knives of various sizes.

A still further object of the invention is to provide a work support which shall be simple and inexepensive and which will enable an unskilled person to quickly and properly sharpen scissors and kives.

With the foregoing and other objects in view, the nature of which will become apparent as the description proceeds, the invention consists of the construction, combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawings, wherein:

Figure 1 is a view partly in vertical section and partly in elevation illustrating the application of the work support to a cutlery sharpening machine,

Figure 2 is a view in front elevation of the upper part of the machine and work support,

Figure 3 is a top plan view of the machine and work support, and

Figure 4 is a sectional view taken on the :55 plane indicated by the line 44 of Figure 3.

The sharpening machine comprises a hollow casting 1 which is provided with a lug 2 and thumb screw 3 which parts constitute a clamp through the medium of which the machine is adapted to be secured to a work bench or other suitable support. Shafts 4, 5 and 6 are journaled in the casting 1. A gear wheel 7 and hand crank 8 are fixed to the shaft 4. Pinions 9 and 10, which are in mesh and of which the former also meshes with the gear wheel 7, are fixed to the shafts 5 and 6, respectively. An emery wheel 11 is fixed to the shaft 6, and is provided with a peripheral grinding face 12 and inclined lateral grinding faces 13 and 14. A cover plate 15 is secured to the open side of the casting 1 by screws 15.

The work support comprises a rear member 16 which is of substantially U-form and is secured to the top of the casing 1 with its side bars 16 and 16 arranged at opposite sides of the top portion of the emery wheel 11 and with its cross bar 16 extending straight across the upper rear side of the peripheral grinding face 12. The front end portions 16 and 16 of the side bars 16 and 16 are inclined inwardly and arranged at the front of the emery wheel 11 and extend diagonally across the lateral grinding faces 13 and 14. A scissors blade rest 17 is secured to the front edge of the cross bar 16 and extends upwardly and rearwardly with respect to the peripheral grinding face 12. The rear member 16 is provided with an attaching arm 18- which extends laterally and forwardly from the lower edge of the side bar 16, and rests upon the upper end of the casing 1. Machine screws 19 are employed to secure the arm 18 to the casting 1. The bars 16*, 16 and 16 are fiat, the bars 16 and 16 being disposed in vertical planes and the bar 16 in a horizontal plane.

The work support also comprises a front member 20 which is of substantially U-form and is secured to the top of the casting 1 in an upwardly and forwardly inclined position with its cross bar 20 extending straight across the peripheral grinding face 12 and with its side bars 20 and 20 occupying an upwardly and rearwardly inclined position and spaced from the lateral grinding faces 13 and 14. The side bars 20 and 20 are provided at their upper ends with rearwardly directed extensions 21 and 22 which are of angular formation in vertical section and of which the upright portions 21 and 22 are arranged in spaced parallel relation to the parts 16 and 16 of the top support 16. The parts 16 and 21 cooperate to provide a knife guide which extends diagonally across the lateral grinding face 13, and the parts 16 and 22 cooperate to provide a knife guide which extends diagonally across the lateral grinding face 14. The front member 20 is provided with an attaching arm 23 which extends rearwardly from the cross bar 20. The attaching arm 23 is provided with a slot 24 and rests upon the upper end of the casting 1. One of the screws 19 is employed to secure the attaching arm 23 to the casting 1, and such screw passes through the slot 24 which permits the knife guide members 21 and 22 to be adjusted forwardly and rearwardly with respect to the knife guide members 16 and 16.

In practice, to accurately sharpen scissors it is only necessary to hold each blade thereof in contact with the rest 17 while moving it back and forth across the emery wheel 11 with its cutting edge in contact with the peripheral grinding face 12. To sharpen a knife, the blade thereof is first reciprocated between the guide members 16 and 21 with its edge in contact with the grindin face 14 of the emery wheel 11, and therea ter it is reciprocated between the guide members 16 and 21 with its cutting edge in contact with the grinding face 13. The front member 20 may be removed when it is only desired to use the rest 17. The work support ma be readily secured to grinding machines di fering in construction from the one illustrated, and with its aid an unskilled person may properly sharpen scissors, knives and the like.

It should be understood that the drawings are merely illustrative and do not pretend to give exact proportions. Furthermore, the said drawings are illustrative of a preferred construction, it being my expectation that various changes and modifications may be made without departing from the spirit and scope of my invention.

What is claimed is 25 In a grinding machine, a U-shaped member having side bars positioned at opposite sides of the grinding Wheel of the machine and a cross bar extending across the peripher of the wheel, the free end portions of the si e bars being inclined, a work rest extending upwardly from the cross bar, an attaching arm carried by one of the side bars, another U-shaped member having side bars positioned at opposite sides of the wheel and a is cross bar extending across the periphery of the Wheel, the free end portions of said last side bars being inclined and arranged opposite said first inclined portions to provide Work receiving guides, an attaching arm carried by the last mentioned U-shaped member, the attaching arms being arranged one above the other and one having a slot extending longitudinally thereof, and attaching elements engaging the other arm and the ma- 4e chine and passing through the slot.

In testimony whereof I afiix my signature.

HARRY G. KELLEY.

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