The Richmond palladium and sun-telegram. [volume] (Richmond, Ind.) 1907-1939, 1909-10-31

pied not to the customary cross heads |
and pistons, but to a crank shaft. call
ed jack shaft in line with the driver |
axles, which in turn is coupled to a mo
tor crank shaft. to which a single mo-
tor delivers all its power. The cranks
are ninety degrees apart, so there can
be no 'on-center" position. The mo-
tor crank revolves uniformly and AZ
constant effort. differing therein from
steam practice. and while the pressure
on the connecting pins and rods vary
throughout each revolution. the turn
ing effort Of the drive wheels is the
same as for the motor, constan.
throughout each revolution.
Distinctive from steam practice all
rods and moving parts have pure TO-
tation only and are thus counterbal-
anced for all speeds, thereby deliver
ing no more shock to the track and i
roadbed than passenger car of equal
weight.
The motor and massive side frames.
jack shaft and all other gear, are
spring supported from the driver and
truck wheels. SO that there is no track
stress other than that local to single
pair of wheels. In this arrangement.
Of motor support and connection, the
center OF gravity height closely ap-
proXimates that in the best high speed |
locomotives.
The Earlier Types.
Earlier types of electric locomotives |
do not possess these features. the pur- !
pose of which is to utilize on the drive |
wheels directly the naturally continu |
Gus rotation of the electric motor or
these there have been several examples. |
one type with small drive wheels to
scure an admirable electrical condition.
others with spring supported motors
influenced by mechanical condition.
both of which were classed high-speed
| types: and then for the lower speeds.
| influenced by both electrical and me-
chanical conditions. the geared type,
! similar. but larger than the common
| trolley motors.
A decided improvement in the
pennsylvania" type is the use Of 4
single motor for two pairs of drivers.
and the benefits secured by its posi-
ton. The motor is located high up
from the roadbed. secure from snow,
dirt and water. and space limitations
are largely removed. In it's design it
possesses electrical features never be-
fore secured on an electric locomotive.
The single motor weighs, without
gear. 5000 pounds. and in weight and
power it is the largest railway motor
ever constructed. II projects into
the cab and, in fact. fills a large part
of it,
The main control apparatus is in n
bulkhead sort of an arrangement CEN
trally located so that there are ample
passage ways along the sides. At
one end is located the electrically driv
en- air compressor for operating the air
brakes.
High-Speed Brake.
In the operating end of the locomo-
tive there is Westinghouse brake
valve for high-speed brake operation.
and also an engineers and controller.
, by which all electrical manipulation is
secured. These correspond to the
, throttle and reverse lever on a STAN
, locomotive.
The controller on the PENNSYLVANIA
, type is scarcely as large as that on a
, Hoe printing press. None of the main
power passes through it, as it is really
, switch, corresponding to a tlepgra-
? piers key, operated by electro-pneu-
matte means. With lever which can
| be moved with one finger. the engineer
can admit to the locomotive current
equal to that available in a hundred
trolley cars.
| 1>0 rod
from an electric conductor. or third
rail, by four contact shoes on each To-
connective. At some points where the
great number of track switches will
not permit this, power will be secured
from an overhead conductor through
an air-operated overhed contact shoe
of which there are two on each locomo-
tive.
Steel Construction.
The new locomotive is of steel con-
struction throughout, and each section
has the usual bell. sand box. and whis-
tie The latter is blown by air.
The first twenty-four 'Pcunsylva-
MIA type electric locomotives to be
built will have the following dimen-
sions:
Total weight, 1876 tons.
Weight of electril parts, 81 tons.
Weight of mechanical parts. 1O3 tons.
Total horse power, 1900.
Maximum draw bar pull, 10000
pounds.
Maximum speed, GO to 20 miles per
hour, under load.
Diameter of drive wheels. IS inches.
| Of truck " % inches
Weight on drivers, IA tons
Mechanical shock without injury.
10000 pounds.
Length over all, 65 feet
Total wheel base. IS feet.