US191569A - Improvement in ripping-tools - Google Patents
Improvement in ripping-tools Download PDFInfo
- Publication number
- US191569A US191569A US191569DA US191569A US 191569 A US191569 A US 191569A US 191569D A US191569D A US 191569DA US 191569 A US191569 A US 191569A
- Authority
- US
- United States
- Prior art keywords
- seam
- guides
- ripping
- knife
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B27/00—Hand cutting tools not provided for in the preceding groups, e.g. finger rings for cutting string, devices for cutting by means of wires
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S30/00—Cutlery
- Y10S30/08—Seam rippers
Definitions
- My invention consists of the ripper-blade, composed of two straight parallel guides, set closely together, and having a knife with two converging edges at the junction of said guides, and of the peculiar construction of the handle thereof, all as hereinafter described.
- Figure 1 is a side elevation of an improved ripping-tool which embodies my invention
- Fig. 2 is an edge view of the same.
- the blade A is formed of a flat piece of sheetsteel, and attached to the handle B by any suitable means, preferably by rivets.
- the front end of the blade I provide with two straight companion guides, a I), set parallel to each other, the ends of 'which may be rounded, and they should be set closely together-that is, so near each other as to answer for guides, one upon each side of a single seam.
- the blade is ground upon the corner or angle of a grindstone, or other suitable sharpener, so as to form a knife 0, with two converging cutting-edges, as shown in Fig.
- the edges of the guides at b, toward their front ends, should be left thick enough to form guides which will not out the thread of a seam, and the guides should be of such length that they will act one upon each side of the seam, to guide the tool at a point forward of the knife 0.
- One of the guides, a is made very narrow, so that it may pass be tween two closely-sewed seams.
- the operation is as follows, viz: The handle of the tool is grasped by the thumb and forefinger of the operator, and the guides at b arerun in between the thicknesses of cloth in which the seam is, one guide being close against the seam at one side, andthe other guide close against said seam at the other side,
- the outer edge of the guide b I bring to a knife-edge, for the purpose of forming it into a small ordinary knife-blade, which feature, however, may be dispensed with, if desired, withoutohanging the general character of the tool for other purposes.
- the handle B, 1 form of sheet metal, with one end doubled over upon the other, and the blade A riveted between them, as shown in Fig. 2.
- the edges of this metal handle, for the greater portion of its length, I strike in dies to slightly roughen said edges, as shown in both figures of the drawing, to avoid the necessity of grasping the handle with an uncomfortable gripe, in order that it may not slip endwise through the hands of the operator when in use.
- the ripping-blade A composed of two straight parallel guides, at b, set closely together, and having a knife with two converging cutting-edges at the junction of said guides, substantially as described, and for the purpose set forth.
- a ripping-tool adapted for operation by an endwise pressure when provided with a smooth-sided sheet-metal handle, B, slightly roughened at its thin edges, substantially as described, and for the purpose specified.
Description
G. D. CLARK.
RIPPING TOOL.
Patented June 6,1877,
5:12:11 'Tfj %,0ZE,JM W
N.PETER$. PHCTO-LITHOGRAPHER, WASHINGTQN, 9 CI UNITED STATES PATENT OFFICE.
GEORGE D. CLARK, OF PLAIN VILLE, CONNECTICUT.
IMPROVEMENT m RIPPING-TOOLS.
Specification forming part of Letters Patent No. 191,669, dated June 5, 1877; application filed. January 25, 1877.
To all whom it may concern Be it known that I, GEORGE D.'OLARK, of
Plainville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Ripping -Tools, of which the following is a specification:
My invention consists of the ripper-blade, composed of two straight parallel guides, set closely together, and having a knife with two converging edges at the junction of said guides, and of the peculiar construction of the handle thereof, all as hereinafter described.
In the accompanying drawings, Figure 1 is a side elevation of an improved ripping-tool which embodies my invention, and Fig. 2 is an edge view of the same.
The blade A is formed of a flat piece of sheetsteel, and attached to the handle B by any suitable means, preferably by rivets. The front end of the blade I provide with two straight companion guides, a I), set parallel to each other, the ends of 'which may be rounded, and they should be set closely together-that is, so near each other as to answer for guides, one upon each side of a single seam. At the junction of the guides a b the blade is ground upon the corner or angle of a grindstone, or other suitable sharpener, so as to form a knife 0, with two converging cutting-edges, as shown in Fig. 1; but the edges of the guides at b, toward their front ends, should be left thick enough to form guides which will not out the thread of a seam, and the guides should be of such length that they will act one upon each side of the seam, to guide the tool at a point forward of the knife 0. One of the guides, a, is made very narrow, so that it may pass be tween two closely-sewed seams.
The operation is as follows, viz: The handle of the tool is grasped by the thumb and forefinger of the operator, and the guides at b arerun in between the thicknesses of cloth in which the seam is, one guide being close against the seam at one side, andthe other guide close against said seam at the other side,
and forced along until the knife 0 strikes the thread. The thread bottom of the converging edges of the knife 0,
will center itself in the and bring the tool central with the seam at that point, while the guides, one acting in contact with each side of the seam at apoint forward of the knife 0, will center the tool at said point. The tool being thus centered at two different points along the line of the seam, it will readily follow said seam, the knife cutting the threads thereof so fast as it is forced against them with sufficient power. The relative position of the tool and the seam is represented by the broken lines in Fig. l, in which d designates the seam, and the other broken lines designate the outlines of the cloth in which the seam is sewed.
The outer edge of the guide b I bring to a knife-edge, for the purpose of forming it into a small ordinary knife-blade, which feature, however, may be dispensed with, if desired, withoutohanging the general character of the tool for other purposes.
The handle B, 1 form of sheet metal, with one end doubled over upon the other, and the blade A riveted between them, as shown in Fig. 2. The edges of this metal handle, for the greater portion of its length, I strike in dies to slightly roughen said edges, as shown in both figures of the drawing, to avoid the necessity of grasping the handle with an uncomfortable gripe, in order that it may not slip endwise through the hands of the operator when in use.
I claim as my invention 1. The ripping-blade A, composed of two straight parallel guides, at b, set closely together, and having a knife with two converging cutting-edges at the junction of said guides, substantially as described, and for the purpose set forth.
2. A ripping-tool adapted for operation by an endwise pressure, when provided with a smooth-sided sheet-metal handle, B, slightly roughened at its thin edges, substantially as described, and for the purpose specified.
GEORGE D. CLARK.
Witnesses WILLIAM L. OoWLEs, A. N. CLARK.
Publications (1)
Publication Number | Publication Date |
---|---|
US191569A true US191569A (en) | 1877-06-05 |
Family
ID=2260976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US191569D Expired - Lifetime US191569A (en) | Improvement in ripping-tools |
Country Status (1)
Country | Link |
---|---|
US (1) | US191569A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5908433A (en) * | 1996-05-10 | 1999-06-01 | Stryker Corporation | Carpal tunnel knife |
US20060072450A1 (en) * | 2003-01-31 | 2006-04-06 | Matsushita Electric Industrial Co., Ltd. | Ofdm signal collision position detection apparatus and ofdm reception device |
US20110005049A1 (en) * | 2008-01-02 | 2011-01-13 | Lena Wiman | Device for use in sewing |
-
0
- US US191569D patent/US191569A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5908433A (en) * | 1996-05-10 | 1999-06-01 | Stryker Corporation | Carpal tunnel knife |
US20060072450A1 (en) * | 2003-01-31 | 2006-04-06 | Matsushita Electric Industrial Co., Ltd. | Ofdm signal collision position detection apparatus and ofdm reception device |
US20100023836A1 (en) * | 2003-01-31 | 2010-01-28 | Panasonic Corporation | OFDM Signal Collision Position Detection Apparatus and OFDM Reception Apparatus |
US20110005049A1 (en) * | 2008-01-02 | 2011-01-13 | Lena Wiman | Device for use in sewing |
US8713766B2 (en) * | 2008-01-02 | 2014-05-06 | Lena Wiman | Device for use in sewing |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US647528A (en) | Tool-handle. | |
US682938A (en) | Horseshoer's knife. | |
US682624A (en) | Knife. | |
US191569A (en) | Improvement in ripping-tools | |
US838852A (en) | Knife. | |
US117588A (en) | Improvement in ripping-tools | |
US647862A (en) | Twine-cutter | |
US636473A (en) | Scissors for cutting leather, &c. | |
US1099885A (en) | Envelop-opener. | |
US489406A (en) | Pinking-shears | |
US338853A (en) | Combined knife and fork | |
US652429A (en) | Combined shears and knife. | |
US1063436A (en) | Seam-ripper. | |
US718847A (en) | Tobacco-knife. | |
US784421A (en) | String-cutter. | |
US1065741A (en) | Buttonhole-scissors. | |
US606547A (en) | Combination-tool | |
US314723A (en) | Ethan eogebs | |
US530613A (en) | Knife-sharpener | |
US585942A (en) | smith | |
US233161A (en) | Envelope-opener | |
US183669A (en) | Improvement in can-openers | |
US575466A (en) | Island | |
US437081A (en) | Knife | |
US237498A (en) | Razor |