Improvement in Machines for Making Plow-Irons. Page: 2 of 3
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UNITED STATES PATENT OFFICE.
JAMES ;I. McGINTY AND THOMAS NOLAN, OF MOULTON, TEXAS.
IMPROVEMENT IN MACHINES FOR MAKING PLOW-IRONS.
Specification forming part of Letters Patent No. 136,444, dated March 4, 1873.Tob ll whom it may concern:
Be it known that we, JAMEs M. McGINTY
and Tioa As NOLAN, of Moulton, in the
county of Lavaca and State of Texas, have
invented a new and useful Improvement in
Machine for Forming Plow-Barsof which the
following is a specification:
Figure 1 is a front view of our machine.
Fig. 2 is a side view of the same, showing the
dies. Fig. 3 is a vertical detail section, taken
through the line y y, Fig. 2. Fig. 4 is a hori-
zontal detail section, taken through the line
x x, Fig. 2. Fig. 5 is a view illustrating the
method of cutting the plow-bars from the bar
or plate.
Similar letters of reference indicate corre-
sponding parts.
Our invention has for its object to furnish
an improved machine for forming plow-bars
which shall be simple in construction, con-
venient in use, and effective in operation, pro-
ducing better bars at much less expense than
when made by hand in the ordinary manner;
and it consists in the combination of the driv-
ing-shaft, driving-wheel, segmental gear-
wheel, intermediate gear-wheel, feed-roller
gear-wheels, feed-rollers, crank or crank-wheel,
and connecting-rod with each other and with
the dies, for the purpose of operating said dies
and feeding the bar or plate to them; in the
dies provided with punches, spring-lifting
bars and stops; and in the method of cutting
the plow-bars from the bar or plate to avoid
waste of stock and enable one set of dies to
cut two plow-bars at each operation, as here-
inafter more fully described.
A represents the frame-work of the machine,
in bearings in the upper part of which revolves
the shaft B, to which is attached the driving pul-
ley or wheel C, to which the power is applied.
Totheshaft B is also attached asegmental cog-
wheel, D, the cogs and blank space being so
arranged that the bar or plate to be cut will
be fed forward the required distance, and then
allowed to be stationary while the dies are
operating. The teeth of the segmental gear-
Wheel D mesh into the teeth of the gear-wheel
E attached to the shaft F that revolves in
bearings in the frame. The teeth of the gear-
wheel E also mesh into the teeth of the gear-
wheel G formed upon or attached to the upperfeed-roller H. The teeth of the gear-wheel G
mesh into the teeth of the gear-wheel I at-
tached to the lower feed-roller J. As the bar
or plate from which the plow-bars are to be
cut is fed forward by the rollers H J, it passes
along the table K, between the guides L at-
tached to said table, and which keep the said
bar or plate in proper position to be operated
upon by the dies. M is the lower or station-
ary die, which is secured to the table K. N is
the upper or movable die, which slides up and
down in ways O attached to the frame A.
The die N is moved by the connecting-rod P,
the lower end of which is pivoted to said die
N, and its upper end is pivoted to the pin of
a crank or crank-wheel, Q, formed upon or at-
tached to the end of the shaft B. The dies
M N are so formed as to form two plow-bars
at each operation. Each die is provided with
two punches, R, to form the holes in the plow-
bars. Each die is provided with holes to re-
ceive the punches of the other die, and which
extend out to carry off the plugs. The plow-
bar is lifted off the punches of the lower die
by two pivoted bars S, which are provided
with springs T to raise the plow-bar, and
which are so arranged that they cannot raise
the plow-bar above the level of the table K,
so that it may be pushed from the machine
by the bar as it is fed forward by the rollers
H J. The plow-bar is held while the upper
punches are withdrawn by a stop or stops, U,
attached to the frame A, and which, when
the upper die descends, enter a notch in it, as
shown in Fig. 3. The piece cut out between
the curved edges of the bridges is held down
when the upper die rises by two stationary
pins or stop-rods, V, attached to the frame A,
and which pass down through holes in the
upper die N. The plow-bars are cut from the
bar in the manner shown in Fig. 5, so that
there is scarcely any waste of stock.
When the die N descends the first time after
a bar is fed into the machine it forms the
whole of one plow-bar and all the second one
but separating it from the bar. The second
time the die N descends it cuts off the second
plow-bar, wholly forms the third, and forms
the fourth all but cutting it from the bar, and
so on until the bar is cut up.
Having thus described our invention, we
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McGinty, James M. & Nolan, Thomas. Improvement in Machines for Making Plow-Irons., patent, March 4, 1873; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166835/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.