Improved Driving Mechanism for Motor Engines worked by Steam or other Fluid Pressure.
Year: 1890

page_text: Date of Application, 12th Aug.. 1890
Complete Specification Left, 11th May. 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improved Driving Mechanism for Motor Engines worked by Steam
or other Fluid Pressure.
We, EUGENE WORMS, Mechanic, and ALEXANDRE SIGISMOND ZWIERZCHOWSKI
Engineer, both of 32 Rue Etienne Marcel, Paris, France, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improved driving mechanism for steam and other motor
engines worked by fluid pressure wherein a reciprocating rod is required to impart
motion to a crank, such mechanism enabling guides and slides for the piston rod to
be dispensed with, while the length of the machine is reduced by about 50 per cent.,
and, the effect transmitted being almost always tangential to the crank circle,
nearly the whole of the theoretical force of the motor fluid is utilised.
For this purpose the piston rod is connected by a short link to the lower end of
a vertically reciprocating double ended lever, the fulcrum of which is carried by
the framing at some distance above the piston rod. The upper and lower ends of
this lever are connected to a system of three rods which form an articulated
parallelogram therewith, and the rod which is parallel with the lever has its end
connected to the crank pin of the engine shaft, the lower rod of the other pair
forming the parallelogram, having its one end connected to the double ended lever
while its other end is connected to the before mentioned rod situated parallel thereto,
at a point beyond its connection with the crank. By this arrangement, the piston
rod in moving to and fro, imparts a pendulum motion to the double ended lever,
and this through the before described parallelogram imparts rotary motion to the
crank shaft in such a manner that the force producing rotation is always applied in
a direction more or less tangential to the circular path of the crank.
By shifting the points of connection of the rods forming the parallelogram, the
proportion between the stroke of the piston and the diameter of the crank circle
can be varied.
Dated this 19th day of duct 1800
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improved Driving Mechanism for Motor Engines worked by Steam
or other Fluid Pressure.
We, EUGENE WORMS, Mechanic, and ALEXANDRE SIGISMOND ZWIERZCHOWSKI,
Engineer, both of 32 Rue Etienne Marcel, Paris, France, 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 :—
This invention relates to improved driving mechanism for steam and other motor
engines worked by fluid pressure, having reciprocating rods connected to cranks.
By mechanism, such as we are about to describe, connecting a piston rod to a
crank we dispense with guides for the piston rod, we greatly reduce the length of
the engine, and provide for directing the driving force nearly tangential to the path
of the crank.
Fig. 1 of the accompanying drawings is a side view of an engine cylinder having
its piston connected to the crank according to our invention.
Fig. 2 is a diagram showing two positions of the parts, the one at a dead centre
of the crank, the other when the crank is vertical.

page_text: A is the cylinder, C the piston, B the piston rod which is jointed by a short link D
to one angle of a parallelogram consisting of a lever H pivotted at I, two rods E
and G and a lever F, these being jointed together at the angles 1, 2, 4, 5 and the
lever F being jointed at 3 to the crank U on the main shaft K. The dimensions of
the parts may be varied to suit different strokes of piston.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
The herein described mechanism for connecting a reciprocating rod such as a
piston rod to a rotating crank.
Dated this 11th day of May 1891.
ABEL & IMRAY,
Agents for the Applicants.