The sun. [volume] (New York [N.Y.]) 1833-1916, 1910-04-03
~ THE WINES.
= Heans % Protection to Niln~rs- DsRer.
eWt Prem Above asrounsI s,slsun..

r@tFrem Above t:rSunsi systems.
IelSphons men Say that within Tia
nsxt ten years every mine Of Importance
IN the country will be- equipped Win
anfercommunicat ting systems Following
ths d'sas ~ Cherry the Illinois Iaxis-
lature passsd n law requiring the installs-
tion OF telephopO systoms IN mines as "A
life saving. precautionary measure. and
the value az tho law has been such that
other States and mine owners ara likely
20 fall in line
Ten years ago some miue ownesn
did put in telephone systems. but they
speedily wore proved useless On account
of the atmospheric conditions. tho damp
ness. tho gases and the Corroslve acids
lot loose by blasting and digging These
bit into tho wires and the phunes and
put the lines out OF comm issiun IN a
COmparat lively short tinle After that
little EFFORT WIS made for several years.
to rig up any communicating system other
than speaking tubes. 90.
The APPARATUS manufacturers WIRE
too busy meeting the demands of tho
abOveground fields to study tho nesds
% mines and not until within tho hast
year has there been any special sYort ~
contrive apparatus that wouit' overcome
the difficulties. Il is now believed that
the former defects Of te,cphons systcupa
for mines have been remccnel o.
Tie economy NJ time in communication
by telephone with the various foramesl
and Euperintsndsnts and with tho variusE
parts ~ the mine makes a strong appeal
To the mine owner. and tho projection
afforded by telephones through 'uick
service in ease Of emergency and th..
ability in case Of cavsin tO inform the
resrtIiny parties II the exact location Of
the imurisone,l miner ~ -elt-eviieni
number og lives might hay" cen <avrt
~ the Iheryv mine n the imprisoned Inen
could have guided their resTIerS,
The telephone sets nsd. Tor mlne tles.
are encas-d IA cast iron boxes with a
hard enamel finish through v hich Gases.
moisture aud acid fumes Cann0s p.ns
tratc. Some have, the ringer in "a separate
box on the outside, but also protectsd.
The door tn the box ~ ClOss-d with a pln
when the instrument is not ln 'sse. Y"
make 10 waterproof a Second door must
he opened before tho ire n-Uittar AMI
man or inspector.
The wires ar brought m through pipes. .
The ringer aTmature aud gOugs are en-
closed IN hood that protects Thorn
while il does not miiti' the sound. SDeCisl
treatment IN given To pieces "f wine
exposed. The metal IPrts. such a. gong
poSts and hollis. are zinr and copper
plate and the Sorrows Pr. of brass reiuc-
ing rust aud corrosipn Ia a minimum. r..
The installation - without many of
the difficulties % air lines. There ara
no poles required and no holes to be dug
The wires are run ON standard wool
equipped with glass iusustors
Ih@s" brick, T. are fast ned - timberS
Or OthOr supports or To the sides Of the
riffs by means Of plugs driven into holes
in the wall
Ordinary line wire - not regarded
With favor. the best construction calling
Tor rubber covered. braided ami saturated
copper wires that remove all danger
rom moisture or dampnezs In sofpa
,ases the wires are also lead covered
Nest Of the mine sets ~ far manufar-
ured have been sent to South Africa
and Australia