Drag Saw. Page: 2 of 3
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UNITED
STATES
PATENT OFFICE.
WILLIAM A., BENNETT, OF DALLAS, TEXAS.
DRAG-SAW.
SPECIFICATION forming part of Letters Pateat No. 291,277, dated January 1, 1884.
Application filed September 10, 1 F3. (No model.)fo all wlVonA it Meay concer:72
Be it known that I, WILLIA A. BENNETT,
of Dallas, in the county of Dallas and State of
Texas, have invented a new and Improved
5 Sawing-Machine, of which the following is a
full, clear, and exact description.
The object of my invention is to provide a
simple, inexpensive, durable, and easily-op-
erated machine for cross-cutting timber for
io railway-ties and material, or for cord-wood,
stove-wood, or other uses.
Reference is to be had to the accompanying
drawings, forming part of this specification, in
which similar letters of reference indicate cor-
15 responding parts in all the figures.
Figure 1 is a side elevation of my improved
sawing-machine. Fig. 2 is a sectional plan
view, and Fig. 3 is an end elevation thereof.
I make a light but strong frame of sills, a,
20o rear posts, b, tied together at the top by the
cross-bar or plate, b', and front posts, c, spaced
apart at the top by abracket-block, c', and tied
to the cross-bar b' by the longitudinal bar d.
The posts b c are suitably framed or boxed
25 into the sills a, and may be further braced
therefrom or from each other, as may be de-
sired.
In bearings e, fixed to posts b, Ijournal the
primary driving-shaft f, which has any ap-
3o proved hand-wheel or crank, f', and a fixed
main driving gear-wheel, g, which meshes with
the pinion h, fixed on a shaft, i, which isjour-
naled in bearings i' on posts b, and carries at
one end the balance-wheel j, and at the other
35 end the crank-disk k,by a wrist-pin, in which
disk the saw-driving pitman 1 has a pivotal
connection at 1', and at the front end said pit-
man is bent inward nearly to the space be-
tween posts c c, and then forward, and finally
40. connects by a pivot-joint at 1 with the saw-
carrying rod m, to which I rigidly connect the
saw n by any approved tongue and groove or
other suitable joint and bolt, as at n'.
The letter o represents a bar or rod, which
45 is pivot-jointed to one or both rear posts, b. as
at o', and extends forward between and beyond
the front posts, c c, by which latter posts bar
o is held so as to have free vertical play, but
no lateral movement. The saw-carrying rod
50 a carries one or more fixed eye-bars or yoke-
plates, m', which are apertured to fit loosely
upon the forward end of bar o, so as to slidethereon for a guide to the saw as the saw is
operated. A bar or pawl, p, pivoted at p' at
any convenient point at the head of the saw- 55
frame-preferably to the bar d-engages by
its lower pointed end or toe and by gravity
with a rack, q, formed on or fixed to bar o,for
holding the saw n down to its work as it cuts
through the log. A spring, r, is fixed to the 6o
frame atr', and below to the bar o,for the pur-
pose of balancing the weight of the bar o, saw
n, and its connections at 1, these parts 1 im n o
rising and falling together; and in practice the
tension of spring r will be regulated so as to 65
sustain the saw at about its lowermost posi-
tion, the object being to relieve the cutting
edge or teeth of the saw of excessive weight
and avoid an undue crowding of the saw, and
thereby facilitate its free and easy cutting ac- 70
tion.
To more conveniently move the machine
from place to place, I provide on pawl-bar 1p
a book, s,to engage an eye, s', on the frame, to
hold the bar p raised, and a hook, t, on bar o, 75
for engaging an eye, t', above,to hold theparts
1 7m n o in a fixed raised position, thereby re-
lieving the spring r- of strain, and avoiding
damage to the saw.
In operation the machine will be placed to So
bring the savn above a log or timber, u, at any
desired point of its length, when the fastenings
s t will be released and the saw will rest on
the timber, and the pawl-barp will fall into
engagement with one of the rear teeth of the 85
rack q, The handle' will now be rotated to
rapidly reciprocate the saw by the gearing and
connections above described. As the cut
through the log deepens, the toe of the pawl-
bar p drops forward into successive teeth of 90
the rack q, and prevents all rising or jumping
of the saw while at work, thereby insuring a
smooth,steady cut without excessive strain or
wear of the saw and its connected parts.
Two or more holes for wrist-pins 1' may be 95
provided at varying distances from the center
of crank-disk k, for changing the length of
stroke of the saw at will, as may be required
for heavy or light timber.
My improved machine may be built cheaply c o
in various sizes, may be safely worked by un-
skilled labor, and by its use time may be econ-
omized and better work assured.
Having thus described my invention, I claim
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Bennett, William A. Drag Saw., patent, January 1, 1884; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth170679/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.