IMPROVE- MENTS IN THE MANUFACTURE OF PLOW-COLTERS
Year: 1887

page_text: Date of Application, 5th May, 1887.
Specification Accepted, 21st June, 1887.
JAMES GAGE BAILEY, spring-maker, and WILLIAM MCINTOSH, manufacturer, both
of New Glasgow, in the County of Pictou, in the Province of Nova Scotia,
Dominion of Canada, do hereby declare the nature of their invention for IMPROVE-
MENTS IN THE MANUFACTURE OF PLOW-COLTERS, and in what manner the same is to
be performed, to be particularly described in and by the following statement :-
The object of the invention is, first, to design a light-weight plow-colter possessing
the necessary rigidity to render it serviceable; and second, to devise a simple method
of manufacturing plow-colters. These objects are obtained by the use of metal bars,
preferably of steel, of the forms illustrated in the accompanying drawings, in which-
Figure 1 is a cross-section of the metal bar used in the manufacture of the colter.
Fig. 2 is an elevation of the same.
Fig. 3 is the cross-section of another metal bar which may be used in the manu-
facture of the colter instead of the bars shown in Figs. 1 and 2.
Fig. 4 is an elevation of the same.
Fig. 5 is an elevation of the finished colter.
Fig. 6 is a cross-section on X X, Fig. 5; and
Fig. 7 is a cross-section on line YY, Fig. 5.
The bars A and B represented in Figs. 1, 2, 3 and 4 are the blanks from one or the
other of which the colter represented in Figs. 5, 6 and 7 is produced. It will be
seen that the sections of these two blanks are exactly the same as the sections of
either the upper portion or stem A, or lower (cutting) portion or blade, B, of the
finished colter. The blank A illustrated in Figs. 1 and 2 is a rectangular bar of the
necessary thickness having a depression bed, the point b, located a short distance
from the edge, a, being the starting point of an inclined plane, bc, having the same
bevel as the blade B, and leaving a flat face, a b, at one edge and a narrow face or
ridge, de, at the other, the ridge of which de is the face having sufficient material in
its cross-section to form the edge when flattened out, as indicated in dotted lines in
Fig. 1. To form the colter from the blank A the ridge de is simply flattened out
into the cutting edge fin continuation of the bevelled face b c. The blank B consists
of a bevelled or wedge-shaped bar having an edge fand a flat face a b parallel with
the back and being of a total width equal to the width of the blade or cutting

page_text: portion B of the colter. In using the blank it is clear that the blade is already
formed and that the upper rectangular portion or stem only has to be produced, which
is effected by upsetting or turning up the edge f, and forming it into the ridge de, as
indicated in dotted lines in Fig. 3.
Thus it will be seen that with the use of one
blank the
stem or square portion of 5
the colter is ready formed and the blade portion has to be shaped at one end by
flattening out, while with the use of the other blank the blade portion is ready
formed and the stem portion has to be shaped by upsetting or turning up the thin
edge f. The result is a lighter colter and a saving of material and labor.
No claim is made to any advantage for the colter thus produced over the ordinary 1
one in regard to its working principle.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, we declare that what we claim is-
1. A plow-colter having the portion above the blade hollowed out on one side,
substantially as described, and for the purpose specified.
2. A metal bar A of the form represented in Fig. 1, substantially as described, for
use in the manufacture of plow-colters.
3. A plow-colter made from a metal bar A of the form represented in Fig. 1,
substantially as described, and in the manner specified.
1
4. A plow-colter made from a metal bar B, of the form represented in Figs. 3 and 4, 2
substantially as described and for the purpose set forth.
Dated this 21st day of April A D 1887