Application filed February 17,1897. either case the em
ployment quick-acting circuit-breaker is
45 necessary, for unless the induction-coil of'
large size and the source current con
siderable power slow gradual make and
break the primary simple transformer,
such would ordinarily effected a
50 switch commutator, would not effect dis
charge the character necessary for the
proper ignition the gas.
E . The circuit
thus closed includes condenser, which by
this operation the switch permitted to
discharge, through the primary trans
former, energy which had previously re- 95
ceived during the interruption said circuit
from battery discharge self-induc
tion coil series with the battery the
charging-circuit.nited States Patent Office.
NIKOLA TESLA, NEW YORK, Y. (Ho model,)
To all whom, concern:
Beit known that citizen
of the United States, residing New York,
in the county and State New York, have in-
5 vented certain new and useful Improvements
in Electrical Igniters for Gas-Engines and
Analogous Purposes, which the following
is specification, reference being had the
drawing accompanying and forminga part of
io the same. 683,524. Benewed June 15, 1898. Instead
of thus temporarily closing the primary cir
cuit the automatic circuit-breaker might be
40 permitted operate continuously, and the
secondary, circuit normally broken, might be
closed the proper time cause the spark
to pass any point. Serial Ho.
SPECIFICATION forming part Letters Patent No. 65
The object invention provide a
more certain and satisfactory means for use
with and control such machines appa
ratus have mentioned for producing
sparks discharges the desired character, 70
and this end employ the following ar
rangement: Any suitable moving portion of
the apparatus caused mechanically con
trol the charging condenser and its dis
charge through circiiit inductive relation 75
to secondary circuit leading the termi
nals between which the discharge occur,
so that the desired intervals the condenser
may discharged through its circuit and in
duce the other circuit current high po- 80
tential which produces the desired spark or
discharge.
In certain kinds apparatus neces
sary for the operation the machine itself
or for effecting the object for which used
to produce electric spark any othersimi-
15 lar local effect given instant time or
at predetermined intervals. For example, in
certain gas explosive engines flame or
spark necessary for the ignition ex
plosive mixture air and gas under the pis-
20 ton, and the most effective way igniting
the gaseous mixture has been found the
production the cylinder the proper mo
ments electric spark. 609,250, dated August 16,1898.
The ends the secondary circuit the Too
transformer above mentioned are connected
with the points terminals the machine
between which the spark pass, and fol
lowing the short-circuiting the condenser
by the closing the switch, strong second- 105
ary discharge induced the discharge the
i
i
.
One practical means accomplishing this
is employ any proper form switch or
commutator operated directly through 85
suitable intermediate devices moving
part the apparatus and which caused
to complete electric circuit which has been
previously broken interrupted for ap
preciable time when the occurrence the 90
spark discharge necessary.
There is, however, form vibrating or
quick-acting circuit-breaker which am
aware that can depended upon operate 55
with certainty produce such spark or
which will continue operate for any length
of time without deterioration, and hence not
only the case engines the kind de
scribed, but other forms ofapparatus which 60
involve the use high-tension induction-
coil with quick-acting circuit-breaker, the
operation the machine contingent upon
the proper operation comparatively in
significant but essential part. The only prac
ticable device which this has been accom-
25 plished heretofore induction-coil com
prising primary and secondary circuit with
a buzzer rapidly-acting automatic circuit-
breaker the primary and circuit-control
ler, such switch commutator, located
30 also the primary battery circuit and op
erated some moving portion the appa
ratus temporarily close such circuit the
proper time, and thereby set operation the
automatic circuit-breaker, which causes be-
35 tween secondary terminals the cylinder the
discharge which necessary for the proper
ignition the explosive mixture
