Year: 1886

page_text: Date of Application, 4th Oct., 1886.
Complete Left, 29th June, 1887.
Complete Accepted, 29th July, 1887.
DESEDVE
I BARTHOLOMEW MCCABE of 67 Scott Street, Buffalo, in the County of Erie and
State of New York, United States America, Sail maker, do hereby declare the nature
of this invention to be as follows:-
The object of this invention is to provide simple and efficient mechanism for
converting reciprocating motion into rotary motion, the improvement being designed
for application to the class of machines driven by treadles, and to steam engines
where it is required to convert the reciprocating motion of the piston into rotary
motion.
The invention consists of a ratchet wheel fast on a shaft between two loose pulleys
carrying pawls adapted to engage the ratchet wheel, the pawls being journalled at
right angles to the shaft and a pair of cords or cables connected with reciprocating
mechanism extending around the loose pulleys in opposite directions, and attached to
the pawls, to draw the pawls into engagement with the ratchet wheel when the cords
are pulled; also in a cord wound partly around each loose pulley and extending over
a sheave journalled at right angles with the pulleys, all as hereinafter more fully
described.
The pulleys have shallow grooves in their peripheries, for guiding the cords. The
pawls are pivoted in the periphery of the pulleys and are oppositely arranged with
respect to each other, but are both adapted to engage the teeth of the ratchet wheel.
The pawls are provided with ears for the attachment of the pair of cords, which are
wrapped around the pulleys, in the direction of the free ends of the pawls. Each
pulley is provided with a stop for limiting the movement of the pawl.
The pair of cords are attached to opposite sides of sectors, secured to a lever, which
in the case of a foot power machine would be a treadle. The third or intermediate
cord passes over a sleeve journalled at right angles to the shaft and is wrapped in the
same direction around the two pulleys, so that forward motion of the one causes a
backward motion of the other.
By motion of the treadle in one direction the one pawl is brought into engagement
with the ratchet wheel, and the corresponding pulley is turned, carrying with it the
ratchet wheel and shaft, at the same time winding up the intermediate cord and

page_text: unwinding it from the other pulley, thus turning the latter in the reverse direction,
carrying its pawl backward on the ratchet wheel and at the same time winding up the
other cord of the pair around that pulley, preparatory to the forward movement of
that pulley. When the treadle is moved in the opposite direction, the action is
similar, but opposite. In large machinery, the cords may consist of wire ropes or
chains or leather belts.
The improvement is applicable to sewing machines, foot lathes or other machinery
driven by treadles; it also may be adapted to converting the reciprocating motion of
an engine piston into the required rotary motion.
In lieu of the pawls and ratchets I may employ any equivalent clutch mechanism.
When the device is to be used in connection with a steam cylinder for converting
the reciprocating motion of the engine piston into a rotary motion, the treadle is
replaced by a lever which is connected by a rod with the piston rod. The recipro-
cating motion of the piston communicated to the sectors, rotates the shaft in the
manner already described, in connection with the treadle motion.
In lieu of connecting the piston rod of the steam cylinder in the manner above
described, I may connect it with the intermediate cord.
B. MCCABE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.
COMPLETE SPECIFICATION.
An, Improved Mechanical Movement.
I, BARTHOLOMEW MCCABE, of 67 Scott Street, Buffalo, in the County of Erie and
.State of New York, United States of America 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:-
The object of this invention is to provide simple and efficient mechanism for
converting reciprocating motion into rotary motion; the improvement being designed
for application to the class of machines driven by treadles and to steam engines
where it is required to convert the reciprocating motion of the piston into rotary
motion.
The Invention consists in a shaft provided with a ratchet wheel and two loose
pulleys placed on opposite sides of the ratchet wheel and carrying pawls adapted to
engage the ratchet wheel journaled at right angles to the shaft, and cords or cables
connected with reciprocating mechanism extending around the loose pulleys in

page_text: opposite directions and attached to the pawls to draw the pawls into engagement with
the ratchet wheel when the cords are pulled, also in a cord wound partly around each
loose pulley and extending over the sheave journaled at right angles with the pulleys,
all as hereinafter more fully described.
Reference is to be had to the annexed drawing forming part of this specification, in
which figure 1 is a vertical transverse section taken on line - in figure 2. Figure 2
is a front elevation. Figure 3 is a detail perspective view of a portion of a ratchet
wheel and one of the pulleys, and the pawl carried thereby. Similar letters of
reference indicate corresponding parts in the different figures of the drawing.
In the frame A is journaled a shaft B, at or near the centre of which is secured
a ratchet wheel C. On opposite sides of the ratchet wheel and on the shaft B, are
loosely placed pulleys D D having shallow grooves in their peripheries for guiding
the cords E E, F, employed in operating the motor. The pulleys D D' are held in
their places adjoining the ratchet wheel C, by collars a secured to the shaft B. In the
pulleys D D are pivoted pawls G G₁ which are oppositely arranged with respect to
each other but which are both adapted to engage the teeth of the ratchet wheel C.
The pawls G G are provided with ears b for receiving the ends of the cords E E',
the cords being wrapped around the pulleys D D' in the direction of the free ends of
the pawls G G. Each pulley is provided with a stop c for limiting the movement
of the pawl. The cord F, which extends over a sheave H journaled at right angles
to the shaft B, is wrapped in the same direction around each pulley D D¹, and is
secured to the pulleys near the pawls G G¹.
By drawing on either of the cords E E¹, the pawl connected therewith is drawn
forward into engagement with the ratchet wheel and the continued drawing of the
cord carries forward the pulley around which it is wrapped and by virtue of the
engagement of the pawl with the ratchet wheel C also carries the shaft B in the same
direction. In the present case the cords E, are attached to sectors I I¹ secured to the
upper surface of the treadle J pivoted in the frame A at opposite edges thereof,
the sectors being oppositely arranged with respect to each other. The cord E passes
over the sector I, and is secured to the under surface of the treadle J and the cord E'
passes over the sector 1 and is secured to the under surface of the treadle. By
moving the treadle in the direction indicated by the arrow, the cord E is drawn, the
pawl G is brought into engagement with the ratchet wheel C and the pulley D is
made to turn, carrying with it the ratchet wheel C and shaft B, at the same time
winding the cord F withdrawing it from the pulley D¹, thus turning the pulley in a
reverse direction carrying the pawl G₁ backward on the ratchet wheel at the same
time winding the cord E around the pulley D₁ preparatory to the forward movement
of that pulley. When the treadle J is moved in the opposite direction, the cord E'
is drawn, first bringing the pawl G₁ into engagement with the ratchet wheel C at the
same time winding the cord F on the pulley D₁, thus causing the pulley D to turn in
the opposite direction carrying the pawl G back over the ratchet wheel for a new
engagement with the ratchet teeth. In this manner, a continuous rotary motion is
imparted to the shaft B by the reciprocating motion of the cords E E. The cords E E¹
may be of any size or of any material. In large machinery, they may consist of wire
ropes or chains or leather belts.
The improvement is applicable to sewing machines, foot lathes, or other machinery
driven by treadles; it also may be adapted to converting the reciprocating motion of
an engine piston into the required rotary motion. In lieu of the pawls and ratchets,
I may employ any equivalent clutch mechanism.
When the device is to be used in connection with a steam cylinder for converting
the reciprocating motion of the engine piston into rotary motion, the treadle J is
replaced by a lever which is prolonged beyond the sectors I I' and is connected by a
connecting rod K with the piston rod L connected with the piston of the cylinder M,
as shewn in dotted lines in figure 1. The reciprocating motion of the piston com-
municated to the sectors II rotates the shaft B in the manner already described, in
connection with the treadle motion. In lieu of connecting the piston rod L of the
steam cylinder M in the manner above described, I may connect it with the cord F.

page_text: In this case, it would be necessary to remove the sheave H farther from the ratchet
wheel C and shaft B.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is ;-
1. The combination with the shaft B and ratchet wheel C of the pulleys D D¹
placed loosely on the shaft, pawls G G¹ pivoted in the pulleys D D¹ and adapted to
engage the teeth of the ratchet wheel, and cords E E and F and sheave Ĥ, sub-
stantially as herein shewn and described.
2. The combination with the shaft B and ratchet wheel C carried thereby of the
pulleys D D placed loosely on the shaft, pawls G G¹ pivoted in the pulleys adapted
to engage the ratchet wheel and provided with ears b, the cords E-E connected
with the ears b, the sheave H journaled at right angles to the shaft B, and the cord F
extending around the pulleys D D¹ and over the sheave H, substantially as herein
shewn and described.
3. The combination with the cords E E¹ of the treadle J provided with oppositely
arranged sectors I I', substantially as herein shewn and described.
4. The combination of the shaft B provided with the ratchet-wheel C, pulleys D D¹,
pawls G G carried thereby and provided with ears 6, the cords E E' connected with
the ears b, the sheave H journaled at right angles to the shaft B, the cord F connected
with the pulleys D D¹ and extending over the sheave H, and the treadle J provided
with the sectors I I¹ and connected with the cords E E¹, substantially as herein shewn
and described.
5. The combination with the treadle J, sectors I 1', the ropes E E, F, and pawl
and ratchet mechanism, of the steam cylinder M, piston rod L, and connecting rod K,
substantially as described.
B. MCCABE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents