The morning news. [volume] (Savannah, Ga.) 1887-1900, 1892-06-17
THE DUDLEY DYNoGRAPa CAR.
aus Work in Giving Information About
the Conditions OF Railroads.

the Conditions OF Railroads.
From the Ne,c York Tribune.
Inc Dudley dynograph car on next Tues
DAY will start on its annual summer in
spection tour over several of the eastern
railroads. The car is the property of P. H.
Dudley, and on this trip Il will start out
with many added improvements. For
months Mr.. Dudley has been working hard
to overcome all obstacles which have con-
Ironted him on former trips, aud this time
he says he has the mechanism of the car In
almost perfect order. Everything has been
30 arranged in the car by the owner and in
ventor that the exact conditions Of the rails
and roadbed, the motion of the car, speed
etc., will now be registered on a long roll of
paper as the car passes over the rails. The
car Ia now at the Grand Central station
and yesterday Mr.. Dudley thoroughly ex-
planned its workings to a reporter Of the
tribune. The car was built expressly for
Mr.. Dudley, and it ia the home of the in
Ventor and his wife as we'll as his workshop.
The car Is forty feet long, and the instru-
ment which records the defects in the rails
roadbed and the other things, is situated in
one end of the car. The instrument is
worked by electricity and by the movement
or the wheels OF the car. The records are
made by system of little glass tubes filed
with red ink and tapering to fine, pen-like
pOAAbos WnLCu Will JFdC6 on paper as the car
moves along at any rate OF speed everything
that is desirable to know about the con-
dttion of the rails and roadbed. The paper
used is about twenty-four inches wide and
1t passes from one roller to another, both
the rollers moving in connection with the
wheels OF the car. strip of this paper eight
feet long is used TO each mile Travelled, and
the points OF the little glass tubes mark on
the paper the alignment Of each rail, tho
degree of curvature as well as the elevation (
erch curve the speed at which the car is NOV
ing, and the condition of the surface of the
rails. Every variation of one.thirty-second
of an inch and over is recorded. In con-
nection with the registering and tracing in
strument In the car is a contrivauce which
automatically ELECTS a drop OF blue paint
upon each joint in the track where the end
of one rail is one-sixteenth Of an inch or
more out Of gear.
The dynograph car goes over the different
systems behind special engine, but does
not travel faster than twenty miles an hour
Better results are obtained, Mr.. Dudley
says, when the car does not move at
greater speed. Along the route traversed
by the car printed slips of paper explaining
the meaning of the blue marks on the rails
are handed to the foremen of the section
gangs, and they Immediately start out to
repair the defects. This summer Mr.. bud.
ley will go with his car over the Lake
Shore road, the New York Central, the
Boston and Albany, the Old Colony, the
New York and New England, and several
other roads,
Mr.. Dudley will live aboard the car dur
ing his trip. He has fitted up comfortable
quarters, and his wife will go with him. In
the car are we'll equipped kitchen, library
and sitting room, In which Mrs. Dudley
has her piano.
Mr.. Dudley Is also the inventor Of the
u" rail which ia now being used on all the
big and the new roads. The I'D" rail
weighs 100 pounds TO the yard, which is
almost twice as heavy as most of the rails
now 10 use. 1t contains larger percentage
OF carbon than the ordinary rail and on 40
count OF its size and weight better speed
can be made over a road built of these rails,
so Mr.. Dudley says. The tracks running
through the New York Central tunnel will
soon be built Of the 100-pound "D" rolls.
Mr.. Dudley is al Ohio man, but he is
well known In New York and elsewhere as
scientific student He is a member of the
academy of sciences and vice president of
the American MicrosCoDiCal Society