US93831A - Improvement in scissors-sharpener - Google Patents

Description

CHARLES E. rALMER`or BOSTON;MASSACHUSETTS.

Lenersratmlvo. 93,331, dated August ,17, 1869.

IMPROVEMENT 1N scIssoRs-enmnuna The Schedule referred to lx1-then Letten Patent-and making part of the lame.-

To allywhom it may concern Y `Be itknown that I, CHARLES-E. PALMER, of Boston, in the county of Suffolk, and State of Massachusetts, have invented anv Improved Instrument for Sharpening Scissors; and I do hereby declare that thefollowing taken in connection with the drawings, which accompany and forml part of this specilication,`is a description of my invention, sufficient to -enable thoseskilled in the art vto practise it.

. My invention' relates to the construction of an in# strulnent or mechanism by which, Without particular .kill, the 'edges' vof scissors-blades'may be accurately ground or sharpened.

.The invention consistsin combining with a `rotary y grinding or emery-wheel, (having a bevelling grindingedge,),a lipped g'uideiprcvided withanopening through which the grinding-edge projects, the lip 4'serving as -a guard in presenting'the edge, andit andthe main surface forming a guide for presenting the blade at the proper angle, and for maintaining theblade in proper angular position as it isreciprocated against the edge ,of the grinding-Wheel.

The drawing represents an. instrument embodying my invention.l

. A shcrysa side v iew, Vand a.- denotes apost, supporting a pivot-frame, l, which has mounted init pivots, c' c,'that support a rotary arbor, d, said arbor carrying a grinder-wheel, 'el

'lhis wheel, which is .preferably an emery-wheel,

has one corner of its pelipheraledge bevelled, as seen at-f, and across this grinding-corner, one edge of the guide h extends.

' This guide consists of a vdat lor.plane face, t, having a shankzor tail-piece k, by which it is 'fastened to one of the pivot-posts, as seen in the drawing.' f y The face i sits ata rer -'eal `angl to the grinderwheel, as seen at A, and Aat its edge it has anju'pturned lip, l,.which' sets at a lateral angle-relatively to the wheel,'as seen at B, the lip being out aways() as to let the corner ofthe Wheel through.Y v

When a scissors-blade is to be ground, the dat inner face" of the blade is laid upon the face fl, and the Y cutting-edge ispressed up agains'tfthe lip l, which will bring the edge against the grinder-wheel, and -at an angle to the reducing-face of.' the wheel,' such as I will grind olf the edge ofthe blade at the proper angle Ato the inner face of the blade, so that as the `wheel rotates, the whole length of the edge may be rapidly and accurately sharpened by moving the blade back and forth, vand holdingthe edge up to the grinder.

Thevnstrument is made with particular reference to its application to a sewing-machine, to be driven by the driving-wheel thereof, and for this purpose the arbor may be provided with a grooved wheel, lm,

into the* groove of which isstretched or sprung arub- -ber ring, n, which, being held upV to the periphery of the sewing-machine wheel, is driven byfrictional contact therewith.

The arbor may be be connected with a'treadIe-shaft, or other shaft especially designed for actuating it. The skill necessary to evenly grind a scissors-blade,

and to bring the edge to the requisite angle in common vvglindirg, is not'reqnired with'this instrument, as the edge is kept from being otherwise than evenly reduced by the' lip l, while the inclination of the guard insures` the necessary angularity ofthe cutting-edge; Hence driven, however, bythe driving-` wheel of la knitting, or other domesticglma'chine, or mayl a lady, or any person unskilled in sharpening tools,

Acan sharpen scissorsblades as perfectly and as. easily as can be done by a practised cntler.- I claim, in combination twith :the -rotary grinderwheel, the inclined guide hand its lip l, substantially `as described. 1

Witnesses: GHARLESE. PALMER'.-

` FmcrsGoULn,

FnANKyJ. 'PLUMMEB.

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