Pittsburg dispatch. [volume] (Pittsburg [Pa.]) 1880-1923, 1891-09-27
THE PERFECT MOTOR.
One Invented That Will Revolution
He Power Applications.
PHOTOS FOR THE KINETOGRAPH.
A Series Of Prizes for Answers to Questions
in Electricity.
MAKING OF OZONE FOR COMMERCE.
PHOTOS FOR THE KINETOGRAPH
MAKING OF OZONE FOB COMMERCE
LwRITTEN For THE p1sPA Tell

| l"KfTTEN FOR THE DISPATCH.1
A very remarkable and entirely new
Inetnoo OF operating an electric motor has
been invented by H. Ward Leonard. The
principle underlying the invention canpos
| yes De disclosed, owing to foreign patents,
Du1 lts complete explanation, which is not
nkeiy TO be long delayed is awaited by cleo
1rlclans with extreme interest. By Mr.. Leon
aro arrangement, the speed of the motor,
as Wen as the torque can be varied inde-
penoently, and the number of watts re-
| qulred Dy the motor varied directly with
tne WORK done under all conditions. This
sysIem IS not only new in electric devices,
Cu' 10 an entirely new principle in me-
cnAhlcs, Tor up to the present time there
never has been any motor, steam, water, gas,
olec9rlo or otherwise, which would enable
one 70 attain any speed desired, and hold
Sna' speeo constantly, when the load varies
from zero to its maximum
Ahe control OF the motor is effected by an
electr1c device, which consumes only a
quarter ampere. The speed is increased or
decreased at will, and the direction of rota-
tioh can De instantly changed. The applica-
tlon or this principle is almost universal
the most important being To hoists rail-
ways, elevators, pumps planers in fact to
all classes of work in which 1t is desired to
Tt Ay Si1I 1ne speed and vary the pull or torque.
- WI! De possible to start a railway train
exertlng the full pull, and vet with a con-
sumption of power which will be extremely
snlaIl, as the starting speed will be ex-
tremely low. The speed will be gradually
acceIerated in a perfectly smooth manner
tne power required gradually increa sing as
the speed Is increased. The application of
TINS system will raise travelling to a LUXURY
ana put an end to the nerve-tearino ioItino
familiar with
By the application of the new motor the
motion of the elevator will be controlled
perfectly from the elevator car in the most
simple manner, and the elevator can be
operated with perfect smoothness at anv
speeQ IN either direction. 1t will also be
posslDIe TO control the motion of the ele-
Vator from any floor, so that in a private
residence 1t will be entirely unnecessary to
nave any attendant, and any person desir-
Ing to go up or down can bring the car to
the proper landing, and, after entering con-
trol 1t from within. The motion of the ee-
Vator Doth at the top and the bottom of the
shaft will be automatically controlled, SO
that accidents will be impossible In case OF
the total stoppage of the electrical supply,
maticallY.
In the matter of electric lighting this sys-
TEN viii be specially valuable, and will
enable many sources of power hitherto re-
garded as unavailable to be utilized. Thus
country residences will be able to secure cleo
trio lighting by power derived from q wind
mill, and railway trains can be electrically
lighted by taking power from the axle, re-
gardless Of the speed Another important
use of the motor will be made in connection
with large ships, the steering gear OF which
can be absolutely and instantaneously con-
trolled by this method from the pilothouse
1t will also be extensively used on men-of-
war, in the handling of guns. and the moving
of heavy Masses all of which can be con-
trolled with the utmost delicacy and ac-
curacy.
Enough has been said to show that one of
the most wonderful inventions of the age
has been not only elaborated but brought
into practical and commercial shape, and
there Is little reason to doubt that it will in
crease the utility and possibilities of cleo
tr1cal applications to an extent hitherto un-
dreamt OF,