US158439A - Improvement in feather-edge skiving-knife for shoe-making - Google Patents
Improvement in feather-edge skiving-knife for shoe-making Download PDFInfo
- Publication number
- US158439A US158439A US158439DA US158439A US 158439 A US158439 A US 158439A US 158439D A US158439D A US 158439DA US 158439 A US158439 A US 158439A
- Authority
- US
- United States
- Prior art keywords
- edge
- knife
- feather
- shoe
- making
- 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
- 239000002184 metal Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
- C14B1/14—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its surface
Description
s. H. REYNOLDS-8; we. NEWHALL. Feather-Edge Skiving-Knifies for Shoe-Making. [ML-158,439. I V Pate nted J;n.5,1875.
m'ilz eses. .[Il Vela 01:9,
THE GRAPH I? CC. PH 0T0 -LIT"L 35 & 41 PARK FLA CE, NY,
UNITED STATES PATENT OFFICE.
SILAS H. REYNOLDS AND GEORGE B. NEWHALL, OF LYNN, MASS.
IMPROVEMENT IN FEATHER-EDGE SKlVlNG-KNIFE FOR SHOE-MAKING.
Specification forming part of Letters Patent No. 158,439, dated January 5, 1875; application filed July l, 1874. I
the edge of the sole presents a thinner and.
lighter appearance than the actual thickness thereof would otherwise admit; and the invention consists in a knife formed of a sheet of metal, the circular line of which is at all points equidistant from a pivotal center, this periphery embracing an arc of a circle, and
containing from five-eighths to three-fourths of a circle, the cutting-edge being formed in a line parallel with a line radial from the center, the cutter being centrally pivoted and formed with a curved slot, through which passes a locking-screw for holding it in position, yet allowing the cutter to be periodically rotated as use and sharpening shall wear back the cuttingedge, thus allowing a perfect adjustment of such edge to the feeding-rolls;
This cutter is also dished, or formed with a curved diametrical line, for the double purpose of insuring rigidity and also imparting to the cutting-edge the requisite angle relatively to the axis of the rolls.
Figure l is a top or plan View of the cutter, and showing the pivoting and locking screws in position. Fig. 2 is also a plan View, with screws omitted, but showing a slight modification of the cutter. Fig. 3 is a vertical section taken on line S T, Fig. 1; and Fig. 4 is a vertical section taken on line U V, Fig. 2.
In the drawings, a represents the cutter. b is the central or pivotal hole. 0 is the curved slot. 01 is the pivot; c, the locking-screw, and fthe cutting-edge. The extent of this edge is shown in Figs. 2 and 3 by the extent of straight line h, which is embraced between line c and dotted line g. This edge-is always so ground as that it shall be parallel with a line drawn through the center as is line S T. j is a narrow bar, so remaining as that it intersects slot 0, thereby imparting to that portion of the cutter outside the slot the rigidity and support of the metal next the center.
By forming the cutter in the manner shown, with an edge adjustable by rotation upon a common center, and with a concave upper face, as shown in Figs. 3 and 4, a large saving in expense is effected. The cutter is more readily adjusted to the other parts of the machine, and performs its office more efiiciently than if constructed in the usual manner from a narrow ribbon of steel, and almost the entire circuit of this cutter may be economized before it is worn out and useless.
We claim The knife a, formed as a segment of a circle, provided with a slot or slots, 6, and turning upon its pivot b, all substantially as shown and described.
SILAS H. REYNOLDS. GEORGE E. NEWHALL.
WVitnesses:
E. F. HALL, T. W. PORTER.
Publications (1)
Publication Number | Publication Date |
---|---|
US158439A true US158439A (en) | 1875-01-05 |
Family
ID=2227849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US158439D Expired - Lifetime US158439A (en) | Improvement in feather-edge skiving-knife for shoe-making |
Country Status (1)
Country | Link |
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US (1) | US158439A (en) |
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0
- US US158439D patent/US158439A/en not_active Expired - Lifetime
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