US1808267A - Sharpening tool - Google Patents

Description

wwfntoz JSez'nou/f' am A J. E. STEINOUR SHARPENING Tool.

Filed Nov.

June 2, 19371.

Patented June 2, 1931 y PATIENT OFFICE JOHN E. STEINOUR,'OF llfOS'l ANGLESLCALIFORNIA SHARPENING TOOL Application lecl November 21, 1929. Sera'lvNo. 408,877. i

y This invention relates to a sharpening tool and has relation more particularly'to a device ofthis-kind especially designed and adapted for useV with'the spiral cutting blades of lawn mowers. Y f y It is an object of they invention to provide avdevice of this kind adapted to have used in connection therewith a iile or` kindred grinding element and wherein the device is provided with means to maintain the grinding element in effective position at all times with respect to the mower bladebeing sharpened.

The invention lconsists in the details of vconstruction and in the combination and arrangement of the several parts of my improved sharpening tool whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advanta 'eous for use,

as will be hereinafter more ful y set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein :-k

Figure 1 is a view in top plan of a sharpening tool constructed in accordance with an embodiment of my invention and in applied position, an associated grinding member and spiral blade being shown in fragment, the applied le being indicated by broken lines;

Figure 2 is a sectional view taken substantially on the line 2-.2 of Figure 1 with the applied file indicated by broken lines;

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 2.

As disclosed in the accompanying drawings, my improved tool comprises an elongated plate P of desired dimensions and which has an intermediate portion cut out to provide an elongated and relatively wide opening 1. The resultant side members 2 delining the opening 1 are upwardly offset substantially from end to end to a position slightly above the adjacent face of the plate P proper. The inner marginal portions of the side members 2 at points spaced lengthwise thereof are 1provided with the dozwnr wardly disposed s Yort arms 5 of a length te employed for the Asame purpose.

extend a slight distance beyond the opposite or -under face of the plate P proper, the extremities of said arms 3 being continued by the inwardly. disposed arms 4. These arms 4 are eachsub'stantially in the form of a V with itsapex outwardly disposed andthe arms 4 at one sideof the plate P are soarranged with the arms 4 at the opposite sidev thereof to Vprovide a plurality of crossed guideways for selective engagement with the spiral blade B of a lawn mower. Y A One end portionv of the plate P has struck therefrom the downwardlyfdisposed fears or clips 5 which are adapted to straddle a guide member 6. .e v

In the present embodiment of my inventionthe guide member 6 is the conventional rod comprised in lawn mower structures connecting` the wheel housings and which rod is disposed in parallelism with the axis of the rotating cutter. j j V i In practice, ,my improved'tool is engaged through the medium of the ears or clips 4 with'the guide member 6 with the blade B to be sharpened disposed between the select- ,ed arms 4. A file or kindred grinding element is placed upon the tool whereupon the ltooltogether with the applied grinding member is moved lengthwise of the guide member p 6 resulting in the desired' sharpening of the 'cuttingedge of the blade B, it being understood that as the tool is reciprocated back and forth upon the guide'member 6 the blade 'B will rock back and forth, thus assuring a most eifec'tivejcutting edge for the blade. l By providing a Yplurality of longitudinally spaced arms 4 a single tool can befconven- ,iently employed with different size lawn mowers and more particularly to compensate for'different' relative spacings between the guide member 6 and the rotating rcutting member.

v `While I- have hereinbefore particularly referred to the rod6 connecting the wheel housings 'as' theguide member, yet it is to be understood that theaxle of the mower maybe 'Thekoppqsiteead portions ef ampia@ P are :termed to pravide hand grasias?? tafacilt este theesifsefmanipulaaca if themes The extremities of the side members 2 are provided with the inwardly disposed lugs 8 which engage over the applied file to effectively maintain the file in desired working position. As clearly illustrated in the accompanying drawings, thearms 5 have their free end portions offset beyond one` face of the side members 2 while the free end portions of the vlugs 8 are offset beyond the opposite faces of said members 2.

It is also believed to beapparent that `by provision of the arms 5 as herein described and illustrated my improved tool can be em's ployed with equal facility with either a right or left hand mower. i Y Frein the foregoing description Vit is tliolightto be obvious thatla sharpening tool constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with whieh it may be assembled and operated, and itfwill also be obviousthat my invention is susceptible of some change and'modification without departing'from the principles and spirit thereof ,and for this reason I do not Wish to be understood as limiting myself to the precise arrangementand formation of V,the several parts herein shown in carrying ont'iny invention in practice except as hereI inafter claimed.

I claimi- Y Y LAY device of the elassdesoribed andin 4. A device of the class described and in combination comprising a plate having an intermediate opening and offset side members defining said opening, guiding means carried by the plate, blade engaging fingers carried by the plate at opposite sides of the opening therein and extending inwardly of said opening, the portions of the yplate delining the sides of the opening'being arranged beyond one face of the plate, the free ends of the iingersbeingposit-ioned beyond the opported by the plate between the side members, and means for. retaining the sharpening element on the plate.

In testimony whereof I hereunto aifix'my signature.

Y i JOHN E. STENOUR, Y

combination comprising aplate having-an intermediate opening and offset side membersdefning said opening, guiding meansl carried by the Plate atopposite'sides of the i 'openingtherein and extending inwardly of Said opening, the inwardly -disposed fingers havingQtheir free end portions.1 90St011ell t0 one side ofthe p1ate,and`a sharpening elenient supported by the platebetween the side members.

'3. A, Ydevice of the classdescribed and` in combination comprising a plate havingan intermediate Aopeningvand offset side members defining said opening, guiding means narried by the plate, blade engaging .fingers ,carried by the plate at opposite sides ofthe openingtherein and extending inwardly of ,said opening, the portions of the pla-fe denng the opposite sidesof the opening thereinbeingarrangedbeyond ,a face of the'opening, and-'a sharpening elementsupported by the' plate. between the side members.

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