which tends bring the spring movable
system into given position proportionate
to the displacement.
The invention based upon certain well
35 known mechanical principles statement of
which will assist better understanding
of the nature and purposes the objects
sought and results obtained. 514,169, dated February .
In carrying out invention and for secur- 70
ing the objects general terms stated above,
I employ the energy steam gas under
pressure, acting through proper mechanism,
to maintain oscillation piston, and, tak
ing advantage the law above stated, con- 75
nect with said piston, cause act upon it,
a spring, under such conditions auto
matically regulate the period the vibra
tion, that the alternate impulses the
power impelled piston, and the natural vibra- 80
tions the spring shall always correspond
in direction and*coincide time.
R .
The further objects the invention are to
provide mechanism, capable converting
the energy steam gas under pressure
into mechanical power more economically
25 than the forms engine heretofore used,
chiefly overcoming the losses which result
in these the combination with rotating
parts possessing great inertia reciprocat
ing system; which also, better adapted for
30 use higher temperatures and pressures, and
which capable useful and practical ap
plication general industrial purposes, par
ticularly small units.attainment the result which
50 have arrived, and attended disadvan
tages which invention are entirely ob
viated.
While, the practice the invention I
may employ any kind spring elastic body
of which the law principle operation 85
above defined holds true, prefer use an
air spring, generally speaking confined
body cushion elastic fluid, the me
chanical difficulties the use ordinary or
metallic springs are serious, owing mainly, 90
their tendency break.
SPECIFICATION forming part Letters Patent No.
NIKOLA TESLA, NEW YORK, Y. SerialH
o. Heretofore,
where the pressure steam any gas has
40 been utilized and applied for the production
of mechanical motion has been customary
to connect with the reciprocating moving
parts the engine fly-wheel some rotary
system equivalent its effect and possessing
45 relatively great mechanical inertia, upon
which dependence was mainly placed for the
, maintenance constant speed.
It well known principle that spring
possessing sensible inertia brought un
der tension, being stretched, and then 60
freed will perform vibrations which are
isochronous and, period, the main de
pendent upon the rigidity the spring, and
its own inertia that the system which
it may form immediate part. This 65
known true all cases where the force . Moreover, instead
of permitting the piston impinge directly
upon such cushions within its own cylinder,
I prefer, order avoid the influence the
varying pressure the steam gas that acts 95
upon the piston and which might disturb the
relations necessary for the maintenance of
isochronous vibration, and also better util
ize the heat generated the compression, to
employ independent plunger connected 100
with the main piston, and chamber cyl
inder therefor, containing air which nor
mally, the same pressure the external
atmosphere, for thus spring practically
. 483,563, (H
om
odel,)
To all whom concern:
Be known that Nikola Tesla, citizen
of the United States, residing New York,
in thecountyand Stateof NewYork,have in-
5 vented certain new and useful Improvements
in Reciprocating Engines, which the fol
lowing specification, reference being had
to the drawing accompanying and forming a
part the same,
to the invention which forms the subject of
my present application, object has been,
primarity provide engine, which under
the influence applied force such the
elastic tension steam gas under pressure
15 will yield oscillatory movement which,
within very wide limits, will constant
period, irrespective variations load, fric
tional losses and other factors which all
ordinary engines produce change the rate
20 reciprocation. the other hand, certain cases,
where reciprocating engines toolshave been
used without rotating system great iner
tia, attempt, far know, has been 55
made secure conditions which would nec
essarily yield such results have reached.nited States Patent Office.
Applicationfiled August 19,1893. This, while
securing measure this object, renders im
possible the
