US1374582A - Tool-sharpening gage - Google Patents

Description

B. KLEIN.

TOOL SHARPENING GAGE. APPLICATION FILED JUNE 18, 1920 Patented Apr. 12, 1921.

5-282. A vm UNITED STATES PATENT" OFFICE.

BENJAMIN KLEIN, or CHICAGO, ILLINoIs.

'roon-snanrnnrne GAGE.

Specification of Letters Pate t.

Patented Apr 12, 19 21.

. Application filed June .18, 1920. Serial No. 389,822.

; useful Improvements in Tool-Sharpening Gages, of which the following is a specification. 1 i

This invention relates to tool sharpening gages.

It relates particularly to a gage for holding shears or other cutting tools at the proper angle to the abrading surface. 7

One of the objects of the invention is to provide a gage by which the tool may be drawn over the abrading surface and which will maintain the tool at the proper angle to the abrading surface.

Other objects are to provide a gage which is simple and inexpensive and into which the tool may be readily inserted.

The gage comprises, in general, a tool holder, preferably formed from a single piece of metal, having jaws between which the tool is gripped and having a plane surface, for sliding contact with the abrading surface, whereby the tool is maintained at the proper angle regardless of the amount of abrasion.

Embodiments of the invention are shown in the accompanying drawings,wherein Figure 1 is a perspective of one form of gage.

Fig. 2 is a top plan thereof.

Fig. 3 is a vertical longitudinal section.

Fig. 1 is a perspective of a modified form of gage.

Fig. 5 is a top plan of the modified gage, and

Fig. 6 is a vertical, longitudinal section thereof.

Figs. 1, 2 and 3 will first be described.

The gage is formed of a single strip of spring metal, such as steel. The body of the strip is bent into a substantially U Y shaped loop having a flat top 10 and a similar, parallel flat bottom or base 11. Top 10 serves as a handle for drawing the gage and the toolcarried thereby along the abrading surface 12, which may be a hone, strop or other device. Base 11 forms a plane surface for engaging the abrading surface. The base maintains the gage in a substantially vertical position relative to theabrading surface and insures that the proper relation is maintained between the abrading-surface and the tool being sharp-f ened.

The end ofv top:10 is bent downwardly to form a aw 13 and theend of base 11.;is

bent upwardly to form a jaw 14. Jaws 13' and 14 overlap to grip and hold a toolbetween them. The top and base of the gage are held properly separated and. substantially parallel by a pin 15. Pin 15 is secured to base 11. and acts as a stop to prevent the outer jaw 13 from being depressed far enough to engage the abrading surface when pressure is applied to draw-the gage and tool along the abrading surfacein the sharpening operation. I

Inner jaw 14 is formed at such an angle to base 11 that, when a tool blade is clamped between the jawswith itsflatside against jaw 14,v the bladehis heldat the proper sharpening angle relative to the abrading surface. l

A blade of the tool to be sharpened, which .is illustrated as being'the blade of a pair of shears or scissors, is inserted betweenthe jaws from the top downward,.as illustrated in Fig. 3. The dotted line shows the position of the blade before it is forced betweenthe jaws. The full line shows'the position of the blade between the j aws in sharpening position against the abrading surface.

To use the gage, the blade of the tool to be sharpened is inserted between the top and base above the jaws as shown by the dotted lines of Fig. 3. With the base of the gage resting on the abrading surface,

Using the top of the-gage as a handle, the

base of the gage is drawn along the abrading surface in the direction of the arrows and, if desired, the blade of the tool may i be drawn through the jaws in the direction of the arrow, while it is pressed to the abrading surface. The abrasion thus takes place from the cutting edge of the tool toward the rear thereof and, if the blade is simultaneously drawn through the jaws, the

abrasion is diagonal relative to the cutting edge. Thus a good cutting edge may be produced.

Figs. 4 to 6 show a modified gage wherein a single strip of metal is bent to form a base for engaging the abrading surface 21. One end of base 20 is bent into a loop to form an inner jaw 22 and an outer jaw 23. Jaw 22 is at such an angle to base 20 that the tool is held at the proper angle to the abrading surface by the resilient force of the jaws. A U-shaped handle 24: is secured to base 20 to be gripped by the operator for moving the gage and tool along the abrading surface.

The blade of the tool is inserted and the gage is operated and functions in the same manner as previously described'for the preferred form. I

The gage provides a simple, cheap and easily operated tool holder. The base, engaging a considerable area of the abrading surface, provides a plane surface which always maintains the jaws and, consequently the tool, at the same angle to the abrading surface. The wear of the tool, due to use and successive sharpening, does not affect or change the angle at which the tool is held and applied to the abrading surface. No adjustments are necessary to obtain the proper angle. The blade is merely inserted with its flat side against the inner jaw, whereby it is always brought against the abrading surface at the same angle.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. A tool sharpening gage comprising a single piece of metal bent to provide a pair of tool holding jaws and a fiat surface for sliding along and engaging only the top of an .abrading surface and of sufficient area to invariably maintain a fixed angle between the jaws and the abrading surface regardless of the extent of wear of the tool during the sharpening process. 7

2. A tool sharpening gage formed from a single piece of metal which is bent into a loop to provide a plane surface for engaging the top of an abrading surface and a handle above the plane surface, the ends of the piece of metal being bent inwardly to overlap to form a pair of tool holding jaws which maintain the tool at a fixed angle to the plane surface.

3. A tool sharpening gage formed from a single piece of metal whose ends are bent toward each other and overlap to provide a pair of tool holding jaws, the intermediate body of metal being formed into a loop. whose bottom provides a plane surface to be moved along the top of an abrading surface to maintain the jaws and surface at a fixed angle, and whose top provides a handle for o erating the gage.

4:. tool sharpening gage comprising a pair of overlapping resilient jaws for holding a tool, the jaws being interconnected by a resilient loop shaped body providing a plane surface for engaging an abrading surface and a'handle for operating the gage, and a stop for preventing excessive compression of the loop.

5. A tool sharpening gage comprising a single piece of metal having its ends bent to. overlap to form a pair of tool holding jaws and the intermediate body bent into a loop to form a plane surface at a fixed angle to the jaws and for engaging and sliding along the abrading surface to maintain the jaws and abrading surface at a fixed angle to each other during'the relative movement therebetween to sharpen the tool.

In testimony whereof I hereunto subscribe my name.

BENJAMIN KLEIN.

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