US2191994A - Hone - Google Patents

Description

Feb. 27, 1940. s, E, ORDAL HONE Filed Feb. 7',- 1938 Patented Feb. 27, 1940" The present invention relates generally to hones, and more particularly. has. to do with providing an improved hone for use in sharpeh- ,ing razors and other fine edged instruments.

As is well known,.when a razor or other fine edged instrument is reciprocated ordrawn over the surface of a hone in, the usualmanner to sharpen its cutting edge, the sharp edges and points of the abrasive material cut into the blade oftheinstrument, leaving the, latter sharp but with an edge more or less in the form of irregular saw teeth of microscopical dimensions.

These irregularities are referred to as a feather or bead on the cutting edge, and it is necessary for the operator to remove such feather or bead before the razor or other instrument can be used.

It is the principal object of the present invention to provide a hone so constructed that the feather orbead formed'on the cutting edge of the instrument by the abrasive will be automatically removed during the honing operation, thereby making it unnecessary to remove such feather as a separate operation after the honing 1 operation is completed.

Another object of the invention is toprovide. a hone formed of abrasivematerial havingxstrips of lead or other suitable material secured in recesses provided in the honing face thereof and which will act to remove the'beadof steel formed on the cutting edge of the instrument being honed as such instrument is drawn across the honing surface during the honing operation.

With the above objects in View, the invention resides in the combination and arrangement of parts andin the details of construction herein after described and claimed, but it isto be un- 9 taken As illustrated in the drawing. 5 indicates 3..

block of suitable abrasive material, such as carborundum, that is. preferably rectangular in shape as shown but may be of anyother desired configuration, and over the surface of which the razor or other instrument is adapted to be drawn or reciprocated, in the usual manner to sharpen the cutting edge thereof. In the preferred form of the invention I provide a pair of spaced apart dovetail shaped recesses 6 in the upper face portion of the block 5, said ree cesses extending lengthwise of the block from one end thereof 'to the other and being spaced inwardly from the opposite side margins of the block as shown.- Disposed in the recesses 6 are lead strips 1 having their upper surfaces lying flushwith the upper surface of the block 5. The lead strips 1' may be formed by pouring molten lead into the recesses 6, or, if desired, dovetail shaped'strips of lead may be inserted in such recesses from either end thereof, as will be read ily understood; i

' In one side of the block 5 I also preferably provide a single recess 8, similar to the recesses 6, that is substantially centrally disposed and extends from one end of the block to the other,

[and this recess also contains a lead strip, as indicated by 9,"which may be inserted or otherwise suitably embedded or countersunk in an. abrasive surface of the hone, as described in connection with the strips 1 in the recesses 6.-

. Asthe razor or other instrument is drawn or reciprocated' over the upper surface of the hone in the honing operation the lead strips 1, one or more of which may be provided, act to remove the feather or bead that is formed on thecutting edge of the instrument by the action of the abrasive material of which the body of the hone is formed, and in like manner when only a portion of the cutting edge of the instrument is being honed on the side of the hone the lead strip 8 functions in a similar manner to remove the bead formed on the cutting edge. The action of the lead or equivalent material in removing the feather or bead is due to the fact that it is relatively smoother and softer than the abrasive surface of the hone and therefore functions somewhat after the manner of a leather strop. As the instrument is drawn over the lead portions,

. the sharp points on the cutting edge left by the action of the abrasive are removed by the lead so that no separate operation is required to remove such sharp points after thehoning operation has been completed.

While in the illustrated construction the recesses 6 and 8 are shown as being of dovetail shape in cross-section so that the lead strips 1, and 9 will be held securely in position in the recesses by the dovetail, it is to be understood that the recesses maybe of any other desired form and thatthe lead strips may be secured therein in any other suitable manner without departing from the spirit or scope of my invention.

Although I have found that strips of lead imbedded in the working faces of the hone act to automatically remove the feather or head that is formed on the cutting edge of the instrument by the action of the abrasive material during the honing operation, it is to be understood that I do not wish to be limited to the use of lead strips, as strips of any other material capable of remov-ing the feather or bead during the honing operation would come within the scope of the present invention.

It is to be understood also that while I have shown the lead strips 1 and 9 as provided only in the upper face and one side of the block 5,

or in only one surface of the hone.

I claim:

1. A hone comprising a block of abrasive material, and means in the form of a pair of spaced apart lead strips countersunk'in said'block and acting during the honing of an instrument to remove the bead formed onthe cutting edge of the instrument by the action of the abrasive material. 7

2. A hone comprisinga block consisting of alternate strips of lead and abrasive material forming the honing surface thereof; v

sive material and a strip of smoother and softer material such as lead, embedded therein andabrasive surface of the'body portion,

- SIGVAL" E. ORDAL.

3; A hone comprising a body portionof abraf.

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