OR IMPROVED MOTORS OR MOTIVE POWER MECHANISM OR MACHINES FOR OBTAINING AND TRANSMITTING MOTIVE POWER
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by John Millar at the Office of
the Commissioners of Patents, with his Petition, on the 21st March
1870.
I, JOHN MILLAR, of Dalry, in the County of Ayr, North Britain,
Machinist, do hereby declare the nature of my said Invention for "New
OR IMPROVED MOTORS OR MOTIVE POWER MECHANISM OR MACHINES FOR OBTAINING
AND TRANSMITTING MOTIVE POWER," to be as follows, that is to say:-
My said Invention consists in obtaining and transmitting motive power
by a novel arrangement of mechanism consisting of levers, on which the
motive force, as weights or pressure, acts through small toothed wheels.
acting and rolling in and on the teeth of an internal fixed rim .or.
stationary disc or segment thereof. A reciprocating beam is fitted into
the disc, working on an axis in or through the centre of the disc, and to
each arm of the beam a lever is attached and fulcrummed, the shorter
arms of which project out towards the inner toothed periphery of the
fixed segmental disc, each carrying a short shaft on which is fixed two
small toothed wheels, which are of different diameters; these wheels gear
and roll on the inside of the toothed rim of the stationary disc, and the
smallest of the two wheels on each arm gears on its inside into a

page_text: segmental toothed wheel fixed on the shaft or spindle of the beam, one
projecting out towards each side, thus reciprocating simultaneously with
and parallel to the arms of the beam. The longer arms of the levers
carrying the small wheels are, by preference, extended over and across
the centre shaft of the beam towards the opposite sides of the fixed disc,
lying parallel to the segmental whicels fixed on the spindle of the beam,
all so that the actuating weight or motive pressure is exerted through two
vertical rods or other equivalent, one placed at each side between the
long arm of the lever (fulcrummed on the further side and arm of the
oscillating beam through which the power or motion is transmitted, and
the segmental wheel on the near side), so as to act alternately on the
arm of the lever and the segmental wheel by lateral projections or other
equivalents on the lower end of the said rods, so that when the power is
acting on the segmental wheel at the one side the weight and power at
the other side is acting on the long arm of the lever at that side, and
vice versa.
When the acting weight on motive pressure is made to act
on one lever the small wheels would tend to run up the inside of the
fixed segmental disc by the lever being fulcrummed on the arm of the
beam on that side, but this tendency is counteracted by the segmental
counterpoise wheel (on the same spindle as the oscillating beam) working
into the small wheel, and the counterpoise weight acting through them.
The diameter and leverage of the small wheel on which the counterpoise
acts through the segmental counterpoise wheel and the length of the
arms of the lever carrying the small wheels are so calculated that the
power exerted by the former predominates, hence the said lever carried
by the beam and parallel with it sinks at the one end and rises at the
other, taking the motion of the transmitting beam, and thus the novelty
results of raising the weight or pressure on each side alternately, by
which the motive power is obtained. The motion of the lever on the
beam and the counterpoise wheel being the same, the transfer of the
pressure from the one to the other is easy and is produced by the
simultaneous turning of the two rods, having the actuating weight
attached, or otherwise the pressure may be got from a beam acting on.
the top of the disc, the pressure on each side of each motor being equal..
Thus when the counterpoise weight is made to act on the extremity of
the segmental wheel and a corresponding pressure on the long arm of
the lever fulcrummed on the same side of the beam the beam is forced
down by the combined weight applied to the lever and the said counter-
poise segmental wheel, and vice versa, alternatively on each side, by the

page_text: simultaneous turning of the vertical rods on opposite sides by any con-
venient self-acting or hand gearing which reverses the action of the
motive weight or power on the lever or counterpoise segmental wheel
as the oscillating transmitting beam reaches the extremity of its lower
reciprocating motion or stroke, thus producing an undulatory or recipro-
catory motion in the beam from which motive power may be taken and
transmitted by the ordinary crank motion or other mechanical motions
well known for transmitting and changing reciprocatory motion into
circular motion, by preference with the assistance of a fly wheel on the
revolving shaft. If the small wheel on which the counterpoise weight
and segment act be two feet in diameter, and the pressure on the rods
be one ton each, that is one ton on the lever resting on the beam, and
one ton on the counterpoise segmental wheel, the beam would be forced
down on the one side with a pressure of twenty-four tons, thus two to
four tons is available for the reversing of the two ton motive weights, a
small fraction of which power would be sufficient to do so, leaving the
remaining force available for the purpose of motive power. By using a
beam with the rods attached and a screw to force them down on the
lever and counterpoise segmental, wheel, the power of the engine would
only be bounded by the strength of the materials of which the parts of
the motor were composed.