ApplicationfiledD
ecem
ber 29,1893. This known true in
35 all cases where the force which tends bring
the spring movable system into given
position proportionate the displacement. therefore propose, order to
secure all the advantages such perform
ances this form engine capable of, to
utilize the means controlling the ad- 60
mission and exhaust steam gas under
pressure other engines generally, but more
especially those forms engine which the
piston free reciprocate, orin other words,
is not connected with,a fly wheel other like 65
device for regulating controlling its speed. 483,563. SerialH
o.
The parts thus described may considered 90
as exemplifying any cylinder, piston and slide
valve with the proper ports controlled there
by, but the slide valve instead being de
pendent for its movement upon the piston B
is connected any manner recip- 95
rocated the piston rod small engine of
constant period, constructed substantially as
follows:—a the cylinder, which works the
piston inlet pipe passes through the
side the cylinder the middle portion 100
the same.)
To all whom concern:
Be known that sla citi
zen the United States, residingat NewYork,
in the county and State New York, have
5 invented certain new and useful Improve
ments Steam-Engines, which the follow
ing specification, reference being had to
the drawings accompanying and forming a
part the same,
io Heretofore, engines, operated the appli
cation force such the elastic tension
of steam gas under pressure, have been
provided with fly-wheel, some rotary sys
tem equivalent its effect and possessing
i relativelygreat mechanical inertia, which was
relied upon for maintaining uniform speed.495,079.
I have produced however, engine which
without such appurtenances, produces, under
very wide variations pressure, load, and
20 other disturbing causes, oscillating move
ment constant period, and have shown and
described the same application filed on
August 19, 1893, Serial No.ciprocated admits the steam the gas by
which the engine driven, from the pipe G'
through the ducts the ends the cyl
inder. such apparatus being es
sential that the inertia the moving system
and the rigidity the spring should bear
certain definite relations, obvious that the
practicable amountof work performed the
engine, when this involves the overcomingof 55
inertia limitation the applicability of
the engine. The cylinder exhausts through
ports into chamber provided with an
opening d". The piston provided 80
with the usual passages which the
movements the piston are brought alter
nately into communication with the exhaust
port.
D are steam ducts communicating with
the cylinder near its ends and the
exhaust chamber passage located between
the steam ports.
In utilizing this principle for the purpose of
producing reciprocating movement con-
4 stant period, employ the energy steam or
gas under pressure, acting through proper
mechanism,to maintain oscillation piston,
and connectwith cause act upon such pis
ton spring, preferably, air spring, under
45 such conditions automatically regulate
the period the vibration, that the alter
nate impulses the power impelled piston
and the natural vibrations the spring shall
always correspond direction and coincide
50 time. 517,900, dated pril .
SPECIFICATION forming part Letters Patent No.nited States Patent Office. The piston &is provided with
two circumferential grooves e,/ Which com-
. de
scription the principle the construction
25 and mode operation this device nec
essary understanding present in
vention.
G designates slide valve which when re- 85
.
R rrin lin r
c tin d
to 75
in ead s. When spring which possesses a
sensible inertia brought under tension as
by being stretched and then freed, will
30 perform vibrations which are isochronous and,
as period, mainly dependent upon the ri
gidity the spring and its own inertia that
of the moving system which forms an
immediate part. similar view modi
fication the same.
NIKOLA TESLA, NEW YORK, Y.
STEAM-ENGINE. (N
om
odel.
The drawings hereto annexed illustrate
devices means which the invention may
be carried out, Figure being central ver
tical section engine embodying in- 70
vention, and Fig
