Wood River times. [volume] (Hailey, Idaho) 1882-1915, 1893-11-18

operation and restores the first mem
toned box to its normal or safety
position. The movement to danger
is made mechanically and the return
movement is effected electrically by
means of a magnet in each box,
which. on being energiZed. releases a
spring that provides for the return
OF the box to its normal position.
Thus an open circuit system is pro-
vided that is so constructed that
should anything happen to the source
of electrical supply no clear signal
would be given, and even should the
system become damaged or broken yet
would it be equally safe, so far as
giving clear or safety signal is con-
cerned when danger existed.
Derailment Stop.
The derailment stop consists of a
lever inside the driving wheels of the
locomotive and within the trucks OF
the cars, whose lower end depends
within few inches of the top sur
face OF the rail. 1t is pivoted so as
to permit of movement Longitudinal
ally OF the train and its upper free
END, which extends beyond the pivot,
IS connected to a link or arm, which
in turn is connected with the handle
OF COCK situated in the main train
pipe OF the trains air brake system.
When the derailment takes place the
lower end is brought in contact with
the ground either by the wheels cut
Ting into the earth or bya sutficiency,
OF the periphery of the wheel de-,
scendlng between two cross ties. By
the forward motion of the train the!
lower end OF this lever is vibratedi
rearwardly, the upper end moving
forwardly from the pivot and by its
forward motion exerting a pull upon
the link connected with the handle
or the cock in the main train pipe,
opening the same and causing the
air to escape, thus applying the
brakes.
Cooperating with this ingenious
device is the drawbridge mechanism
winch consists OF sliding rod lying
al ana across the land end of the
bridge terminal, and projecting out
sufficiently to be engaged by a bracket
or arm fastened to the bridge and
moving with it. This sliding rod
mas colled upon it a spring, so ar
ranged that when relieved from the
pressure OF the arm or plate it springs
out, and upon the return of tho
Drldge 1T is pushed back and the
spring compressed. pivoted to the
cross-ties is bell-crank whose ends
are engaged respectively by the slid
ing transverse rod and line OF gas
pipe lever running parallel with the
track. This is carried back a sutfi-
Gent distance and there connected
TO crank arm, which in turn is con-
hected TO rock-shaft lying trans
Versely or the tracks, and to which
are connected at suitable places sec.
tor' SNAPPED trip-pieces, which ara
raised and lowered by the rotation of
the transverse rock-shaft as the
pfldge Is opened and closed through
means OF above-described mechanism.
Ihese trips when In operative or
raised position, which Is the position
Chey occupy when the bridge is
opened, engage the levers of the air.
brake system, and by turning them
PACK apply the brakes and stop the
Tram. Upon the closing of the bridge
Ihey are OF course turned down and
out OF operative position. An en-
slneer approaching an open draw
ofldse nrst passes signal warning
nim to stop, and failing to obey II
[or any reason his levers are struck
ana turned back by the stops and he
comes TO standstill upon the rails.
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