A NEW OR IMPROVED REVERSIBLE ROTARY ENGINE
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at the
Office of the Commissioners of Patents on the 29th March 1881. A communi-
cation from abroad by Herrman Schönfeldt, Merchant, and Carl Friedrick
Höbne, Teacher, both of Berlin, in the German Empire.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the
Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, and 20, Forhaabningsholms Allée, Copenhagen.
"A NEW OR
IMPROVED REVERSIBLE ROTARY ENGINE." A communication from abroad by
Herrman Schönfeldt, Merchant, and Carl Friedrick Höhne, Teacher, both of
Berlin, in the German Empire.
.The Invention relates to engines operated by steam, the explosion of gas or other
actuating fluid, and consists of the following arrangements :-
In a cylindrical shell or chamber is placed a shaft on which a drum is keyed,
which carries two radial pallets placed diametrically opposite to each other. The
space between the inner periphery of the shell or chamber and the outer periphery
of the drum, as also two valves contained therein, are so arranged as to be steam
tight.
Steam, gas, or other actuating fluid is conducted by a supply pipe into the
space between the shell and the drum through one or other of two cocks, according
to the direction in which the engine is to be driven, the other cock remaining
shut.
The acting space inside the shell or chamber is formed by the shell, the drum,
one of the valves, and one of the pallets; the latter stands inside the space behind
the open cock in the direction of motion. The expansion of the entering steam,
or the explosion of the entering gas, turns the pallet, and with it the drum
and shaft, until the steam or gas outlet is reached; meanwhile the other pallet enters
the acting space, and further expansion or explosion operates upon it. The pallets
in revolving strike one of the loose valves, which is allowed to hang down into
the acting space, and opens it by means of a buffer rivetted to the said pallet,
turning the valve round on its centre; the valve closes the space immediately the
pallet has passed beyond it by action of a weight or spring. In order to drive the
pallet in the opposite direction, the valve, which has until now been kept closed, is
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page_text: opened, and the other one which has been acting is closed by suitable levers, catches,
and other mechanism.
The reversing mechanism is of the following character:-To the side or end of
the shell is screwed a boss to which are fixed two spiral springs surrounding guide
rods moving in the holes of forked guides, which the said springs take into; the
forked guides are connected by hinges with the levers of the inlet cocks, so that
the pressure of the said springs acts upon the levers of the cocks, and closes
the latter immediately after they are released by catch mechanism. By means of
a hinged part, the releasing lever is allowed to complete its backward movement
without acting.
In order to make the expansion variable, the release may be regulated by means
of a connection with a suitable governor.
In operating the engine by the explosion of gas, a suitable opening or openings
is or are made into the chamber for the admission of the exploding flame.