The sun. [volume] (New York [N.Y.]) 1833-1916, 1891-12-27


| ready In ft is out. 30 operator A. cannot turn
om thau can turn 6s MthSSt P ss9 ;ss2o
8 be no mistake sthon 5on he
twS onerators. and one is net likely to hanpen
trolls ali the operators behind him;
may hell. himself out and release his own lever
'd Ct as sy as ac"f Tis New
S wants 6 ssst hi SssP sps ass
plnnsed' S Snd e Unlocked 'fefs the Circuit Of
ihdIcated tsat the biook. BIO Is clear
and II is msnitestlly safe for ,, trait,
IS still psfr tower 1as and sh The Engineer $sasss vii
pass It without Instructions. Operator dis
plays q. green flag from the window, which
proceed with caution until It reaches the next
block: This supplementary signal Is provided
tamper With their t eabinets s"'ns op' "
Before operator b let's the train in With .
Gpesm flag he signals to The NeX
co%Sinationss and sheir sisniScanos: u ''
ring, acknowledgment Of signal. except a. other
iss Il. sI ;sss ssss 'an'.
q. block 10 not yet clear.
U. IL there train coming to met Answer ov Of
IA. Clear Train has passed.
Hsys are not unlocked all.
iI2I : IRAN hss gone on siding and switches 70
go oe;faston. Danger signal Stop all trains
approaching this tower. towel -,,,. ,,.,. and
proceeding toward iy You. away ." "''"' "-', ~
The New Haven officials say that . real. lend
sse snd n
the bell signal and sreen aSs a. Is long as
.s sFes
n the 81 ss ySSaa fse
Tosf snd PRfadoiR SSs 01 dssiee q tSslr Ss
sseh tower SsF"s' red 'dSi isk Is hung in
frame and strong spring and on weight
eSsposeiy changes /; Ne does tSIs hy, pSlIinss
the eve ofthe frame, The operator pulls the
T .nsns h and %srss rs q the S rope sans ss
Haven road The operator signals 70 the man T.
that there i Still train IL ths block the arst
or viii he n let ON
most OF the roads using black sig
nal systems. the towers are from two to three
miles apart. In the Fourth avenue tunnel the
blocks are shorter. to permit OF q smaller In
teIyal Of time between trains.
The Pennsylvania road has obtained good
results with the Westinghouse electro-pneu-
matte system. and probably that system will be
adopted between Jersey City and philadelphia
as an extra IL t. thS
Railroad Of New Jersey has tbs Rneumatte sys aye
and during the storm of two years
down in this vicinity. rendering tele-
graph signalling impossible. the. Jersey
Central trains ran along as II nothing had hap
pened. The pipes containing the COM
pressed air are stretched alongside the
tracks, and at Intervals Of from LOCO
to 1000 feet are discs Indicating danger
Side ie track Heh Ss as's clears cars
strike as they pass. and when the last truck
remains In that position until the train has
passed out OF the next block ahead, and. as
the trucks leave the second disk changing
it to danger" the frat disk becomes
clear" In this way there Is always q clear
block between two successive trains That Is.
there are not two trains In successive blocks.
The discs are electrically connected with tho
compressed air system which does the work.
The electricity simply locks and unlocks the
machine. and 1t is communicated through q
track circuit.
One Of the chief advantages oflthe pneumatic
system is its cheapness. The plant costs much
less than the Sykes system. and It does not re-
quire half as many men to operatett 1t Is au-
tomato, as Tar as the signals are concerned.