Improvements in Rotary Motors.
Year: 1898

page_text: Date of Application, 4th Apr., 1898-Accepted, 8th Oct., 1898
COMPLETE SPECIFICATION.
Improvements in Rotary Motors.
I, MANN MAX FRIEDLAENDER, of Sellerstrasse 6, Berlin, N., Germany, Factory
Proprietor, 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 firstly to mechanism for quickly actuating the obturator or
slide valve of rotary motors thereby reducing the loss of steam to a minimum, the
obturator not being moved during the useful operation of the steam but allowing
the wing piston to perform nearly its full working revolution and pass by the same
whereupon the obturator is quickly closed steam tight with a noiseless movement.
The invention relates secondly to means for insuring the steam tight operation of
the obturator and of the wing piston.
In the accompanying drawing,
Fig. 1 is a vertical section of a rotary motor with the invention applied thereto.
Fig. 2 a section on line x-x of Fig. 1 with parts similar to those shewn on the
left hand side omitted on the right hand side.
Fig. 3 a detail side view on an enlarged scale of the cam mechanism by which
the obturator is actuated and
Fig. 4 a modification of the same.
Figs. 5 and 6 are respectively an elevation and a plan of a modified construction
of the mechanism for actuating the obturator.
Fig. 7 a modified means for connecting the obturator with the rod through which
it is actuated.
Fig. 8 a section of the steam cylinder of the motor with the obturator in edge
view.
Fig. 9 a section on line y-y of Fig. 8.
Figs. 10 and 11 refer to details of construction of the wing piston.
The wing piston c is constructed to take up wear. It comprises a plate x keyed
or wedged on to the nave b and provided in the middle of its edges with grooves
for the reception of movable frame parts y, y¹, y², furnished with oblique slots v in
which engage studsz fixed in the plate x said frame parts being by the action of
springs so moved in two directions against oblique bearing surfaces that all the
frame parts are correspondingly displaced towards the surface to be travelled over.
The nave b is carried at its ends in recesses bored out in the cylinder covers d
so as to rotate steam tight therein. e are grooves formed in the cylinder covers d
for the reception of the side edges and guidance of the obturator or slide f. This
obturator comprises two conical or taper parts or surfaces the lower and larger of
which is adapted to slide within the cylinder whilst the smaller upper conical part
closes the upper surface of the cylinder wall beyond which it cannot move.
obturator also closes against the nave b and against lateral ways or grooves formed
in the cylinder covers d. 9 (Fig. 2) is a cross bar guided in its upward and down-
ward movement by the bolts h and having attached to it the obturator rod i. The
cross bar is jointed at each end to one end of a connecting rod k the other end of
which connects with a lever carried by an eye m of a standard n. The lever
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page_text: provided with an enlargement o having a curved surface against which the curved
surface p of the cam q moves.
This cam is fixed on the main shaft a. To the
lever is attached a downwardly projecting arm carrying at its bottom end a
lever one end of which is connected with the lever by a spring and the other
end carries a roller which runs in an inner curve of the cam q.
Upon the rotation of the shaft a the cam q carried round with it bears by its
surface p, when this has arrived within reach of the enlargement o of the lever l,
against this enlargement so as to move this lever without noise or shock and the
connecting rodsk and with these the obturator f up and down and also so as to
hold the latter in its proper position, the circular portion of the cam 7 keeping
the obturator closed so long as the steam is operating and the curved portion p
quickly lifting it to permit the passage past the same of the wing piston, and then
closing it again by reason of the rapid fall of the lever after the highest point
of the curved surface p has passed it.
By means of the double set of working parts, one at each end of the cross
bar g a regular and exact motion of the obturator is obtained and the proper
operation of the lever is secured by the lever r¹ and roller 92.
The modified construction shewn in Fig. 4 is particularly adapted for high speed
motors. The connecting rod k' carries at its lower end a sleeve z¹ adjustable by
means of a spring or screw nut. The sleeve z¹ is provided with one
rollers against which the cam 9 moves and thus a controlled movement of the
obturator is obtained.
or two
In the construction shewn in Figs. 5, 6, the obturator is operated from one side
only of the motor. Here is an eye bracket fixed to the cylinder cover and
carrying an oscillating double lever w¹ forked at one end where it connects
through links and a cross bar with the obturator rod, and at the other end
is ball jointed to the connecting rod which is moved from a cam groove l³
of the cam q¹ through lever l¹.
In Fig. 7 the connection between the driving cam and the obturator rod i¹ is
established by means of a frame k¹.
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 rotary motors an obturator or slide valve mechanism in which cams or
their equivalent whilst not communicating any movement to the obturator during
the operation of the steam, permit the wing piston to perform nearly the whole of
its working revolution and then moving against the curved surfaces of suitably
adjusted sliding parts actuate through suitable connections the obturator at any
desired velocity, substantially as described and shewn.
2. In rotary motors an obturator or slide valve mechanism in which the connecting
rods through which motion is transmitted to the obturator, each carry a sleeve
provided with a roller which sleeve is adjustable on the rod by means of a spring
or screw nut, for the purpose specified, substantially as described with reference to
Fig. 4 of the drawings.
3. In mechanism of the kind referred to, the transmission of motion from the
driving cam to the obturator through a bent frame k substantially as described
with reference to Fig. 7 of the drawings.
4. In rotary motors the provision of steam tight friction surfaces consisting in
fitting the ends of the nave which is fixed on the main shaft and carries one or
more wing pistons, into corresponding recesses in the cylinder covers, substantially
as described and shewn.
5. In rotary motors the steam tight arrangement of the obturator consisting in
forming said obturator of two conical parts and mounting it to move in grooves
provided in the cylinder covers, so that the cones close against the cylinder wall
and the cylinder covers, substantially as described and shewn.

page_text: 6. In rotary motors the construction of the wing piston of movable frame
parts subject to spring pressure for the purpose of obtaining a steam tight piston
surface substantially as described with reference to Figs. 10, 11, of the
drawings.
Dated this 4th day of Anril 1808
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.