Improvements in Driving Mechanism for Steam, Gas or other Engines.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Mechanism for Steam, Gas or other Engines.
JEAN SCHNEEWEIS, of 50, Mylinsstrasse, Frankfurt-on-Main, in the Empire of
Germany, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the driving mechanism of steam, gas, oil or other
engines and its object is to avoid the following disadvantages of ordinary crank-
driven motors.
1. The piston soon becoming a bad fit in the cylinder owing to the unequal
wearing of the cylinder and the piston periphery (due to the eccentricity of the
connecting rod).
2. The rapid wearing out of the links and bearings.
3. The shaking of structures such as cars and ships propelled by the engines in
consequence of the explosive shock in the cylinder.
4. The vibration of the engine and foundation by the oscillating masses.
My invention consists in providing the piston and all the reciprocating parts-in--|
duplicate, the like parts being equal and oppositely situated and in causing
the pistons by means of suitable rods to act on slide rails on the flywheel or
driving wheel so as to rotate the latter.
According to one modification of my invention, I provide two pistons back to
back in the same cylinder and to each piston I rigidly connect a piston rod.
Each piston rod at its outer end carries a crosshead and each crosshead has at
its ends two bars which return from the crosshead alongside the cylinder and
are guided so as always to move in a plane containing the axis of the cylinder.
Each of these bars (of which there will be four altogether-two for each cross-
head) carries two small rollers which roll on a slide-rail rigidly fixed on a fly-
wheel or driving wheel of the engine, one roller being on the inside and the
other on the outside periphery of the rail. This slide-rail is elliptical so that
it will be rotated by the reciprocating movement of the bars and rollers. I
provide two of these slide rails mounted on wheels, one at each side of the
cylinder and each slide-rail is operated by two bars, one from each crosshead.
Both the inside and outside peripheries of the slide-rail are elliptical but the
ellipses are not similar because the line joining the centres of the two rollers on
any bar is not always normal to the curve.
When my invention is applied to explosion motors the guides for the before
mentioned bars are mounted outside the water jacket or cooling ribs to prevent.
them getting overheated. The valves and other mechanism may be operated
either from the reciprocating parts of the engine or from the flywheel or driving
wheel; and the motor with its parts may be supported or suspended in any
usual manner.
By forming the slide-rails elliptical I obtain one revolution of the flywheel
for every two strokes of the pistons. If I wish to obtain one revolution for

page_text: every four strokes, or any other ratio of rotary to reciprocating motion, it is only
necessary to alter the form of the slide-rails; this is purely a question of design
Dated this 27th day of October 1899.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13. Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents.
Improvements in Driving Mechanism for Steam, Gas or other Engines.
I, JEAN SCHNEEWELS, of 50, Mylinsstrasse, Frankfort-on-Main, in the Empire
of Germany, Engineer, 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 the driving mechanism of steam, gas, oil and other
engines, its object is to avoid the disadvantages which result from the ordinary
crank driven motors. In the usual constructions of such ordinary engines the
piston frequently becomes a bad fit in the cylinder, owing to the unequal wearing
of the cylinder and the piston periphery due to the eccentricity of the connecting
rod. The rapid wearing of the links and bearings is also a disadvantage common
to the ordinary type of engine while the vibration of the structure such as cars
and vessels propelled by the engine is a resultant of the shocks in the cylinder.
The vibration also of the engine and foundation has to be provided for when
constructing and arranging ordinary engines.
My invention consists in providing the piston and all the reciprocating parts
in duplicate, like parts being equal and oppositely situated, and in causing the
pistons by means of suitable rods to transmit the motion to the fly wheel or
driving wheel in a steady manner.
My invention is particularly applicable for use in connection with motor cars,
inasmuch as I am able to dispense with connecting rods, cranks and links and to
construct a motor in a very compact form for driving the cars.
In the accompanying drawings the apparatus is illustrated which can be
employed for motors of all kinds although by way of example only, I show a
gas motor, the ordinary details for producing the explosive mixture, the valves
and ignition gear, oiling apparatus and the like being omitted for the purpose
of rendering clearer my improvements.
Figure 1 is a vertical section through the motor along the line A, B.
Figure 2, is a horizontal section along the lines C, D, on Figure 1.
Figure 3 is a vertical section along the lines E, F, Figures 1 and 2.
Figure 4 illustrates the carrying of the E-shaped rod in different positions on
the fly wheel.
Figure 5 shows the two most extreme positions of the piston in connection
with the fly wheel guide on Figure 4.
Figures 6 and 7 represent the piston with E-shaped rod in plain and perspective
view.
According to one modification of my invention I provide two pistons a, a,
which I place back to back in the same cylinder and to the piston I rigidly
connect piston rod b. Each piston rod at its outer end carries a cross-head c
and the bars attached thereto and parallel to the rod b, the bars slide in
guides e. Each bar carries two rollers or sliding cheeks f four of the latter

page_text: always embracing a guiding rail which is attached to the arms spokes or
spoke disc of the double fly wheels and are so shaped that the rollers f when
moved to and fro by the piston effect the turning of the fly wheels, the latter
turning on the pin or axle i and are connected with pulleys k or with toothed
wheels or other driving gear.
The guide paths of the guiding bars are produced by the suitable motion of
the two parallel lines varying in their distance from each other. A projection of
this guide path on the plane of the fly wheel shows therefore two crooked lines
which are not parallel, arising from the fact that the two circles f with a fixed
centre i move to and fro repeatedly (in Figures 4 and 5 for example twice) on a
guiding line during one revolution corresponding to the stroke of the piston
and the number of strokes. Each circle describes an area bounded by two
crooked lines which enclose the third area, the boundary lines of which represent
the projection of the guide paths of the guiding bars.
In order to avoid too great heating the guide e for the bars d is not mounted
directly on the cylinder jacket, but for example, in gas motors with air cooling,
on the cooling ribs m, with water cooling, on the channels n.
As herein before described I have illustrated a gas motor in the accompanying
drawings, such motor being attached to the bottom o of a motor car by means
of the bracket P, the gas and air valves are in this example arranged in the
attachment q. In steam engines the valve gear can be arranged in a very direct
manner.
The valves and slide valves may be actuated in any approved manner either
from the fly wheel or from motion rods.
The motor with its parts may be supported or suspended in any usual manner
and the driving and other gear connected therewith may be modified to suit the
purpose for which it is required.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
-
1. In motors, the arrangement for transmitting the motion of the piston to
the driving shaft by means of a rigid E-shaped rod or link which is securely
attached to the piston and connected to the fly wheel, substantially as herein-
before described and as illustrated in the accompanying drawings.
2. In transmitting mechanism and parts for use in connection with motors as
described in Claim 1, the arrangement of a guiding bar attached to the arms or
other portion of the fly wheel for converting the rectilinear motion of the piston
into the circular motion of the fly wheel in which the guiding path of the guide
bar is produced by motion, suitable to and corresponding to the piston stroke and
number of strokes, of two parallel lines altering in their distance from each
other substantially as herein before described and as illustrated in the accom-
panying drawings.
DL11.
T... 1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13. Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents.