Improved Treadle Motion.
Year: 1889

page_text: Date of Application, 23rd July, 1889-Accepted, 16th Nov., 1889
COMPLETE
SPECIFICATION.
Improved Treadle Motion.
We, WILLIAM H. DOUGHTY and WILLIAM NAGLE both of 633 Van Buren Street
Brooklyn in the County of Kings and State of New York, United States of America
Manufacturers do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement :-
Our invention consists of a contrivance of mechanisin intermediate of the treadle and
a counter shaft from which the power is applied whereby the intermittent driving
power of the treadle is distributed so as to act continously on the counter shaft and
drive a jig saw or other reciprocating device alike in both directions and so as to
operate the machine more uniformly and increase the effective application of the power
all as hereinafter fully described reference being made to the accompanying drawing
in which
Fig. 1, is a front elevation of a jig sawing machine in which our improved treadle
motion is represented, and
Fig. 2, is a sectional elevation of the same on lines, c, of fig. 1.
The treadle a, is connected by the strap b, passing over the segmental rock pulley c
with the pulley d, keyed fast to the forward and backward rotating shaft e, connected
by pulley, and strap g, with the spring drum h, in which is a coiled spring i, so
arranged that it is wound up when the treadle is forced down and the shaft é, turned
in the forward direction thereby and when the power is relaxed on the treadle the
spring reverses the motion of the shaft e, and raises the treadle again, so that said
shaft is subject to the direct effect of the treadle in one direction and is indirectly
impelled in the other direction through the action of the spring.
On the shaft e, are two driving pulleys j, and k, alternately driving in opposite
directions through the ratchets 1, and pawls m, respectively connecting them with said
shaft reversely, which pulleys are connected with the counter shaft n, one by a direct
belt 0, and the other by a crossed belt p, so that whichever way the shaft e, turns,
there is a continuous and uniform application of the power to this counter shaft in one
direction, and there is a fly wheel q, on said shaft which being geared up to a rapid
speed enables the machine to work with greater uniformity and precision particularly
when as in this example the power is to be applied to a reciprocating device as a jig
saw s, through a crank t, and a connecting rod u.
The rocker segment c, carries the belt b, from the pulley d, to the treadle in a
direction favoring the more effective action of the treadle than if the angle of the belt
and treadle were more acute, the rocker may however be dispensed with and the belt b,
extended directly from the pulley to the treadle.
Instead of locating the spring i, in a spring drum h, mounted separately from the
shaft e, the spring may be coiled around and connected directly to the shaft, and
instead of using a flat coiled spring we may use a spiral spring, one end being con-
nected to any support and the other connected to the pulley, on the shaft e, by a belt
this is indicated by the dotted lines in both figures of the drawing.
as
The device is also useful for driving rotary machines as lathes, circular saws and
the like.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be perforined, we declare that what
we claim is:
1st. The combination with the treadle and counter shaft of the forward and back-
ward rotating shaft connected to said treadle by the band b, and the pulley d, keyed
fast on said shaft, the pulleys j, and k, on said shaft alternately driving in opposite

page_text: directions through the ratchets and pawls respectively connecting them with said shaft
reversely, said pulleys connected with the counter shaft, the one by a direct and the
other by a crossed belt, and the spring connected with shaft e, and opposing thereon
the action of the treadle substantially as described.
2nd. The combination of the rocker segment c, with the treadle a, band b, pulley d,
reversely rotating shaft e, the oppositely driving pulleys j, k, and the spring impelling
said shaft reversely to the action of the treadle substantially as described.
Dated this 23rd day of July 1889.
PHILIP M. JUSTICE,
Associate Agent.