USRE3670E - Improvement in needle-sharpener - Google Patents

Description

' luited tatw @stmt crimine.

'A..s.-D1NsMonn,'or 'N'EWYoRIc-NVY.

Letters Patent No. 90,433, dated May 25, 1869; reissue No. 3,670, dated October 12, 1869.

INIPROVEMENT IN NEEDLELSHARPENR.

The Schedule referred to in these Letters Patent and making part of the same To all whom itmay concern:

Be it known that I, A. S. DINSMORE, of the city, county, and State of' New York, haveinvented a new and improved Needle-Sharpener, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming' part of this specification, in which- Y Figure 1 is a perspective view of my improved needle-Sharpener, and

Figure 2, a. cross-section ot' the same, taken as indicated by the line :v x, in tig. l.'

Similar letters of reference indicate corresponding parts.

My invention has for -its object the production' of a cheap, simple, andy ecient needle-sharpener, designed more particularly for sharpening sewing-machine needles, or repointing the .same when broken; and

Said invention consists ina peculiar and advantageous construction of such device, substantially as hereinafter described, and whereby a separate frame or base, as hereinafter more fully described, is or -may be dispensed with.

Referring to the accompanying drawingl A and B represent two blocks or plates, made of i steel, or other suitable material; 'I he adjacent edges 0f the upper parts ofI these plates A B are bevelled off, and the said bevels griooved, roughened, or cut so as to forni tile-teeth, as shown in iig. 1.

One of such blocks or. plates A B may be formed with a projecting shoulder, a, which, when the plates are arranged face to face with their beveling-edges inclinin'g in reverse directions, overlaps the bevel of the other plate, as shown in figs. 1 and 2.

Said two blocks or plates A B are secured to each other, or adjusted and secured, by one Ior more screws or rivets, in such manner as to cause the two plates, on their inner faces, to bear one against the other, so as to be mutually sustaining, whereby a separate .frame or base, to carry and steady the plates,'may be dispensed with, and the whole device, as a needle-shamener, is greatly'cheapened and simplified. In rising the instrument, the needle to be sharpf ened is held at a greater or less inclination, according to the degree of taper it is desiredtogive to-it at its point. The needle is then drawn through or along the roughened bevelled edges ot' the Sharpener, and at the same time turned so that its point may betapered evenly all around.

The shoulderia of the one plate is designed to prevent the point of the needle from enteug by any possibility the joint between thel said blocks or plates A l5, s0'that the extreme point of the needle may be properly sharpened. Said shoulder, however, may, if desired, be dispensed with.

las specified.

y A. S. DINSMORE. Witnesses:

FRED. Haynes, HENRY ,PALMER

Images