US2462176A

US2462176A - Hone for reconditioning cutters in pencil sharpeners

Info

Publication number: US2462176A
Application number: US27405A
Authority: US
Inventors: William H Fryar
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-05-17
Filing date: 1948-05-17
Publication date: 1949-02-22
Anticipated expiration: 1966-02-22

Description

Feb. 22, 1949. w YA HONE FOR RECONDITIONING CUTTERS IN PENCIL SHARPENERS Filed May 17-, 1948 William H. Fryar Y INVENTOR.

BY M

Patented Feb. 22, 1949 UNITED STATES PATENT FHE HONE FOE RECONDITIONING CUTTERS IN PENCIL SHARPENERS 4 Claims.

This invention relates to hand tools and implements and has reference, in particular, to a tool which is especially designed and aptly constructed to effectively hone and recondition rotary spiral cutters such as are embodied in crank operated pencil sharpeners currently in use.

My primary aim is to provide a simple, practical, up-to-date tool which, after the usual shavings case is removed, may then be temporarily spring clamped on and against the cutters and held on the latter, while the crank is turned counter-clockwise whereby to act on said cutters in a manner to recondition the latter for extended usefulness.

Beyond the immediate design, my tool is an improvement over other similarly purposed devices in that it has hingedly supported hone holders which, in applied positions, adapt themselves to effectively contact the frusto-conical cutters to the end that effective and uniform results are repeatedly had.

In carrying out the preferred embodiment of my invention exceeding care has been exercised to include all worthy requirements so that users will find their needs fully met.

Pursuant to the above a pair of spring urged, pivotally connected levers are provided and they carry, at their forward ends, opposed holders for honing stones and said holders are tiltable and substantially self-adapting, whereby to accommodate and to properly grip the frusto-conical cutters.

More specifically, novelty is predicated upon a pair of substantially duplicate complemental levers pivotally connected to each other intermediate the ends of the levers, the stated holders being hingedly mounted on the forward ends of the levers and urged toward each other by spring means interposed between the rearward ends of the levers, said holders serving to maintain, through spring action, the honing stones in contact with the rotary cutters while the cutter head, carrying such cutters, is revolved by the usual crank operated gearing.

Other objects, features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.

In the drawings:

Figure 1 is a perspective view of a tool or implement constructed in accordance with the principles of the present invention;

Figure 2 is a view in side elevation, with the holders and stones in section, showing the manner in which the tool is used;

Figure 3 is a section cut on the line 3--3 of Figure 1, looking in the direction of the arrows with the abrading or honing stones removed;

Figure 4 is a section on the vertical line 44 of Figure 2, locking in the direction of the arrows, certain parts of the sharpener stand being omitted.

Referring now to the drawings by distinguishing reference numerals and attending lead lines, the levers, which are duplicates of each other, are denoted by the numerals 6 and l and are rectilinearly straight. They are provided intermediate their ends with

lateral lugs

8 and 9 operatively and pivotally connected to each other in overlapping relation, as denoted at lil. Studs II and 12 are provided on the rearward or left hand end portions of the levers and these serve to accommodate and hold in place an expansion spring l3. The holders for the honing or abrading stones I l are denoted by the numerals l5 and I6 respectively and said holders are also duplicated in construction. A description of one will suilice for both. Each holder comprises substantially rectangular flat backing plates ll having outstanding centrally located ears l8 to accommodate the forward end portion [9 of the coacting lever. The lever is pivotally mounted between the ears as at 2!). The transverse ends of the plates are provided with right angularly disposed marginal flanges 2! which, in turn, are provided with inturned flanges 22, said flanges 22 being spring tensioned and of sufiicient resiliency to permit the honing stones or blocks to be slipped and snapped into place. It will be noted, in this connection that the stones are rectangular and that two stones are mounted in each holder and that the inner adjacent longitudinal edges of the stones are in spaced parallelism.

In practice the usual shavings and dust collector casing (not shown) is removed from the stand A of the pencil sharpener to uncover and expose the revolvable cutter head B turned by the customary hand crank C. The crank, when rotated, imparts the usual planetary action to the rotary frusto-conical cutters D. With the cutter head uncovered, as shown in Figure 2, the levers 6 and 'l are pressed together against the tension of the spring and to open the jaw-like holders. Then, the holders are released and pressed by the spring means into contact with the spiral-type cutters D. Now, as the hand crank is turned and the cutter head revolved by the usual gearing (not shown) the cutters are rotated in wiping contact with the stones and are thus honed, in an obvious manner. The spring is sufilclently strong to maintain the holders and bones in effective contact with the relatively rotatable cutters. In using the device it is desirable to rotate the crank handle in a counter-clockwise direction and generally ten to twenty turns are sufficient to transform dull cutters into sharp, reconditioned cutters.

A careful consideration of the foregoing description in conjunction with the invention as illustrated in the drawings will enable the reader to obtain a clear understanding and impression of the alleged features of merit and novelty suflicient to clarify the construction of the invention as hereinafter claimed.

Minor changes in shape, size, materials and rearrangement of parts may be resorted to in actual practice so long as no departure is made from the invention as claimed.

Having described the invention, what is claimed as new is:

1. A hand sharpening implement for honing and reconditioning rotary cutters in a pencil sharpener comprising a pair of opposed complemental levers, said levers having lugs intermediate the ends of the levers, said lugs being hingedly connected with one another, spring means interposed and fastened between the rearward ends of said levers, duplicate holders pivotally mounted on the forward ends of said levers, and hones mounted in said holders.

2. A honing device for sharpening twin cutters of a conventional-type pencil sharpener comprising a pair of levers pivotally connected to one another intermediate their ends, and duplicate complemental holder for abradant elements hingedly mounted for operation on the forward ends of said levers, each holder comprising a fiat, rectangular backing plate having transverse end flanges carrying laterally inturned flanges, the latter opposed to said plate and being resilient whereby to afford clamping and retaining facilities for honing stones, and spring means mounted between said levers and serving to resiliently clamp said holders in operative positions when in use.

7 3. A device for resharpening twin cutters in a cutter head of a conventional-type pencil sharpener comprising a pair of duplicate stone holders, each holder embodying a substantially flat rectangular backing plate having transverse angularly disposed flanges provided with auxiliary flanges, the auxiliary flanges being resilient and directed toward each other and underlying the backing plate, the exterior side of the central region of said plate being provided with outstanding spaced parallel ears, a pair of duplicate levers, the forward ends of said levers being pivotally mounted between the ears on the respective holders, the intermediate portions of said levers being provided with lateral lugs, said lugs being overlapped and pivotally connected together, the rearward ends of said levers having opposed studs, and a coiled spring interposed between the rearward ends of the levers and anchored in place at its opposite ends on said studs.

4. A device for resharpening twin cutters in a cutter head of a conventional-type pencil sharpener comprising of duplicate stone holders, each holder embodying a substantially fiat rectangular backing plate having transversely disposed end flanges, certain of the flanges being resilient and directed toward each other and being opposed to the backing plate, the exterior side of the'central region of each plate being provided with outstanding ears, a pair of duplicate levers, the forward ends of said levers being pivotally connected with the ears on the respective backing plates, the intermediate portions of said levers being pivotally connected to each other, the rearward ends of said levers having opposed studs, and a coil spring interposed between said rearward ends and held in place by said studs.

WILLIAM H. FRYAR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,130,695 Allen Mar. 9, 1915 1,173,627 Whitcomb Feb. 29, 1916 1,436,825 Sanford Nov. 28, 1922 2,197,891 Kriechbaum Apr. 23, 1940