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Publication numberUS709917 A
Publication typeGrant
Publication dateSep 30, 1902
Filing dateOct 22, 1901
Priority dateOct 22, 1901
Publication numberUS 709917 A, US 709917A, US-A-709917, US709917 A, US709917A
InventorsFrank L Marshall
Original AssigneeFrank L Marshall
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stitch-ripper.
US 709917 A
Images(1)
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Description  (OCR text may contain errors)

Patented sept. 3o, i902.

lNn. 709,9I7.

F. L. MARSHALL.

STITCH mPPER. (Application led Oct. 22, 1901.)

(No Model.)

milk ogm TN: mams Firms co. vnofouruo.. w/sr-nnaToN. mc.

UNTTEE STATES ATENT OEEICE.

STITCH- RIPPER.

SPECIFICATION forming part of Letters Patent No. 709,917, dated September 30, 1902.

Application led October 22, 1901. Serial No. 79,521. (No model.)

To all whom it may concern:

Be itknown that I, FRANK L. MARSHALL, a citizen of the United States,residing in Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Stitch-Rippers, of which the following is a speciiication, reference being had therein to the accompanying drawings.

My invention relates to a cutter for ripping stitches; and the object of `my invention is to produce a cutter which will rip out the stitches and seams of all kinds in any material without injury to thel material.

The following is a clear description of my invention, reference being made to the accompanying drawings, in Which-- Figure l is a perspective View of the stitchripper. Fig. 2 is a side elevation with the top in section. Fig. 3 is a side elevation of the cutter. Fig. 4t is a side elevation of a modified form of cutter.

' Similar letters refer to similar parts throughout the several views.

My device comprises two parts-first, the cutter A, and, second, the holder B, by which the cutter is held in the right position when in use.

In the cutter A, a is the blade, sharpened on its upper side. This blade d instead of terminating in a sharp point, as is usual, is drawn out in a round blunt point a', which projects a short distance beyond the edge of the blade. The other end a2 of the cutter A is flat and tapers toward the end, so that when it is inserted in a slit in the holder B it forms what is known as a taper fitf In the holder B of the cutter A, b is the vertical standard, with itsupper end bent horizontally and slotted at b' in order tol receive and hold the tapered end a2 of the cutter A. In its lower half the standard b has a circular ange b2, which acts as a support for the holder when it is attached to the table, and for the purpose of so attaching it the lower end of the standard is bent horizontally to form the arm b3. This arm b3 is iat on its upper and lower surfaces and near the end is bored vertically and provided with a thread in order to receive the screw C, which is used in fastening the holder to a table or shelf.

Fig. i represents one of the many modifications. of my invention. The cutter-blade D is curved and ends in the blunt point or guard d; but a short distance back of the point d is a second projecting blunt point or guard cl3. Between the two points is a shortcutting edge dl, aud above and back of d3 is another cutting edge d5, Which extends back to the bend in the cutter. The object of the second point d3 is to prevent the material slipping up on the edge of the cutter and being injured. The cutting edge d4 is so short that-it is impossible for the material to slip far enough to be injured thereby.

Vhen intended to be used, the holder B is set up on the edge of a table or shelf, as desired, (see Fig. 1,) with the Iiange b2 resting on the top of the table T and the arm h3 eX- tendiug under the table. The screw C is then screwed u p against the top of the table until the holderis firmly fastened. The cutter is then inserted into the slot b and pressed in and forms a taper t. The stitch-ripper is then ready for use.

The blunt end of the cutter is inserted under the stitches and separates the pieces stitched together, so that the operator, sitting back of the cutter and drawing the seam toward him, will draw the stitches onto the edge of the cutter, which severs them.

The blunt point of the cutter acts as a guard to prevent the cloth running upon the sharp edge of the cutter and also prevents thecutter running into the cloth, which it would do provided the point of the cutter were sharp.

The great advantages of my stitch-ripper are that ripping can be done with great rapidity and with the minimum risk of injury to the material. My cutter can be mounted in a handle and used as a ripping-tool; but better results can be obtained when it is firmly fastened in a holder andthe work drawn against the cutter and the stitches thus ripped, since it allows the operator to have the free use of both hands in handling the Work.

Obviously various changes may be made in the form, proportion, and minor details of construction Without departing from the spirit or sacrificing any of the advantages of my invention, and I desire to claim my invention inthe broadest manner legally possible.

IOO

What I claim ishaving the blade a with one cutting edge and lo l. Astitch-ripper, comprisingaeutter, havthe guide a' and the holder B, all substaning one or more cut-ting edges and one or more tially as described. blunts points, and a holder. In Witness whereof I affix my signature in `2. Astitch-ripper, comprisingacutter havthe presence of two witnesses.

ing a curved blade, lche outer edge of which is sharpened, terminating in a blunt guide Witnesses: and a holder, substantially as described. OSCAR N. FOSSETT,

3. A stitch-ripper, comprising a cutter A,

FRANK L. MARSHALL.

CHARLES A. WHITNEY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3990144 *Feb 12, 1976Nov 9, 1976Boris SchwartzSuture cutter and removal means
US5267698 *Apr 28, 1992Dec 7, 1993Pettit Ashma BCoconut grinder
DE1093754B *Dec 30, 1952Dec 1, 1960Jul Jecker Laurenz SohnTrennwerkzeug
Classifications
Cooperative ClassificationA01G3/08, Y10S30/08