used to print from directly in ordinary ink. See Heliotype.
Car′bon tool-point.
An application of the diamond to mechanical purposes.
These points are used to point, edge, or face tools for drilling, reaming, sawing, planing, turning, shaping, carving, engraving, and dressing flint, grindstones, whet-stones, emery, corundum, tanite, or tripoli wheels, iridium, nickel, enamel, crystals, glass, porcelain, china, steel, hardened or otherwise, chilled iron, copper, or other metals.
Dickinson's carbon tool-points.
1 is a triangular prism-like cutter for turning or working stone, etc.
2 is a flat drill-point for drilling stone, glass, or metal.
3 is a burin for cutting or turning metal.
4 is a quadrangular prism for working stone, etc.
5 is a hexahedron to be inserted in the edge or face of a circular saw for cutting stone.
6 is a double-sided trapezoid, used in various positions for marking or turning stone, steel, or other substances.
7 is a chisel point
pr. 21, 1874.
152,662ManningJune 30, 1874.
154,173DavisAug. 18, 1874.
156,154GullmannOct. 20, 1874.
156,892Rickart et al.Nov. 17, 1874.
3. Corders.
12,858DickinsonMay 15, 1855.
25,255GolayAug. 30, 1859.
3. Corders (continued).
No.Name.Date.
26,561BradyDec. 27, 1859.
28,776Rank inJune 19, 1860.
31,494TaylorFeb. 19, 870.
110,335BennorDec. 20, 1870.
113,741ChestermanApr. 18, 1871.
116,809CochranJuly 11, 1871.
118,655WagnerAug. 29, 1871.
119,962BreedOct. 17, 1871.
121,998DickinsonDec. 19, 1871.
122,872WagnerJan. 6, 1872.
1. Tables. (continued).
No.Name.Date.
123,813FrenchFeb. 20, 1872.
127, 604HoytJune 4, 1872.
132,027SargentOct. 8 Branch's, March 3, 1874.
o, Emerson's, May 26, 1874.
p, Husbands's, June 2, 1874.
q, Emerson's.
r, Husbands's, June 23, 1874.
s, Emerson's.
t, Dickinson's, August 11, 1874.
It will be perceived that some of these imbed the diamond in the saw by sockets, rings, or solder; others grasp it by fingers which are cl