Improvements in or relating to Motor Engine Mechanism.
Year: 1898

page_text: Date of Application, 27th Jan., 1898-Accepted, 26th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Motor Engine Mechanism.
I, FLORIAN TENTSCHERT, of V Franzensgasse 18, Vienna, in the Empire of
Austria, 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 has for its object to limit mechanically the stroke of the piston in
motors using steam, air, water or other fluids, in which the power is transmitted to
machines &c. by the reciprocating piston, without a fly-wheel and crank, and
therefore without a rotary motion, and also automatically to work the valve-gear
(slide-valve or the like) of the motor-cylinder.
The parts used for these purposes are as follows:-
Two rods 61 and 62 of equal length (see Figs. 1, 23 and 4 of the accompanying
drawings), two slide-blocks g¹ and g², a bifurcated oscillating arm h¹ together with
a shaft j and a frame i connected to the piston-rod k.
One end of each of the two rods 61 and 62 is pivotted to the slide-blocks g¹ and g²,
respectively. The movement of the two rods during a stroke, takes place
symmetrically relatively to the axis of the piston-rod.
The other ends of the rods 61 and 62 are pivotally connected by means of a bolt,
with the forked arm h¹ on the shaft j, in such manner that the arm h₁ can make
symmetrical oscillations forwards and backwards.
The piston rod k is secured to the frame i, surrounding the two slide-
blocks g¹ and g², and is provided with projections 11 12 13 and 4 between which
engage the corresponding slide-blocks g' and g².
When the piston-rod k moves to the right, the right-hand cross-head g² is pushed
in the same direction, and the rod 62 together with the arm h¹ is drawn towards the
In both directions of
right, the frame i being subjected to a compressing strain.
movement of the piston-rod k, the slide-block which does not engage, is pulled
without performing any work.
During one stroke of the piston the arm h¹ mounted on the shaft j oscillates
At the end of a stroke of the
symmetrically relatively to the axis of the latter.
piston, the arm h¹ and the rod pulled, form one straight or comparatively straight
line (Figs. 2, 3 and 5) and limit the stroke, the projections 11 12 13 and 4 coming
against the corresponding projections of the slide-blocks g¹ and g². In the central
position of the piston the swinging arm h¹ and the rods 61 and 62 occupy the position
shown in Fig. 4. In both end-positions and in the central position of the piston
the distances c¹ c² c³ (Figs. 3, 4 and 5) of the two slide-blocks g¹ g² from each other
are equal.
Figs. 1 and 2 show a motor with two cylinders arranged one behind another for
high and low pressure (horizontal tandem motor)." The frame i rests on
lateral projections 1, 2, 3 and 4 of the slide-blocks g' g² and is partly supported by
them.
The valves 8 8 (in the instance illustrated, ordinary slide-valve, the ports being
arranged in the usual way) are operated from a pin u secured to the rocking shaft j.
The movement is transmitted from the pin u through a connecting rod t and a

page_text: link to the valve-rod w.
The two valves 8' and 82 are loosely mounted on the
valve-rod w, and are caused to move by means of tappets or nuts m¹ m² adjustably
mounted on said valve-rod.
Figs. 6, 7 and 8 show a motor with one cylinder, coupled direct with a pump.
Obviously a condenser can be coupled directly to the piston rod by continuing it,
when desired. In the same way the motor may have three cylinders arranged one
behind another (triple expansion).
The equalisation of power can be effected, when desired, by interposing a rod Z
which is weighted with a vertically guided weight Y, as shown diagrammatically in
Fig. 5.
Figs. 9 and 10 illustrate a starting device to enable the valve s to be brought
from its central position into one of its end-positions, by means of a lever a and a
rotatable rod provided with 2 cams or tappets e.
The motor can work either in a vertical or in a horizontal position, and is adapted
for driving mechanism which works with reciprocating motion, such for instance as
pumps, compressors, presses and scissors as well as saws and punching machines,
which it is advantageous to drive by means of a motor.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A motor driven by steam, air, water or other fluids and having one or more
cylinders with a reciprocating piston and without a crank or fly-wheel, characterised
by two rods b¹ 6 of equal length, one end of each of which is connected to a
corresponding slide-block g¹g, the other ends being connected to an oscillatory
arm secured to a rocking shaft j and together with the latter participating in the
oscillating motion; the slide-blocks being arranged in a frame secured to the
piston-rod, projections on said frame engaging with corresponding projections on
the slide-blocks when the piston has arrived in its end positions, whereby owing to
the connection between the connection between the oscillatory arm with the
rods 61 62 and the projections of the slide-blocks, connected with them, the stone is
mechanically limited, substantially as described.
2. In a motor of the character described, a pin u on an arm of the shaft j,
connected by means of a rod t with a pivotted lever v having its free end connected
by means of a link with the valve-rod which operates the cylinder valve or valves
by means of adjustable tappets m¹ m² the movement of the valve-rod taking place
in a direction opposite to that of the piston-rod in each end-position of the piston
the corresponding inlet-ports being opened and the exhaust taking place on the
other side of the piston through the valve, substantially as described.
3. The combination and arrangement of parts constituting the complete motor
mechanism actuated by a reciprocating piston rod, substantially as described and
illustrated in Figures 1 and 2 of the accompanying drawings.
Dated this 27th day of January 1898.
BOULT & WADE,
Agents for the Applicant...