The watchman and southron. [volume] (Sumter, S.C.) 1881-1930, 1902-03-12
sJP-To DAT TELEPHONES.
The Fine Instruments That Sunlfer Ra'
on Exhibition at the Exposition.

One Of the man features OF tne.
Sumter County exhibit is the hand
some diselay Of s Imperial telephones
and witchboards exhibited by the
Telephone Manufacturing Company,
ofSsSumter, S. ssa 81
There are two systems fully con-
nected. showing the entire operation
Of q telephone exchange using either
the drop system or the central energy!
system, which is one of the late lm-5
proYementsS IN the science OF telephony.
The great improvement IN the central
energy system is In the concentration
of all electric power ID one Central
office and IN changing the supervis
ion Of the swiitt ttchboard almost entirely
from the use Of sound to that Of
sigh. Instead Of subscriber having
! to ring to signal S Central this is.
done By merely taking down the
receiver. which ntomaEcally lights a
minia ature electric lamp in the central
Office switchboard and notifies the
operator that connection is wanted.
tfCentral's then listens for the num-
#ber wanted and rings up the party by
merely pushing IN the ping as far as.
it viii go. A red supervisory light
then burns till the party called takes
oownsSh he receiver, upon which 1t goes
out, thus motif Central that both
parties are tal,kiine Then, when the
conversation is finished and they hang.
up the receivers, both the red and.
white supervisory lights fash up to.
notify sCentra1, 2 to disconnect. The
Imperial central energy switch
board exhibited is for one hundred:
connections and is Of highly polished
walnut, and tie telephones are of.
handsomeIy finished oak and walnut.
from native woods, all Of which are
manufactured at Sumter.
For the drop system there are two
styles Of telephones finished IN walnut:
and ouartered oak IN different colors.
One is the new style magnetic and
the other is the standard No 6 lmpe-
rial. = The switchboard is equipped
with self-restoring drop, etc.
The Imperial, w1tchboard, equip
ped with self-restoring drop and jack.
combined. is electrically and mechanic
ally correct IN every detail, and for
durability, rapidity Of operation, SIM
plicity Of constructs economy IN
maintenance and beauty is without an
equal The cabinet is made Of quar-
tered oak or walnut, beautifully finish
ed and Highly polished.
Each 100 line board is equipped with
one complete operators set, ten pair
of cords and plugs, ten clearing-out
drops and listening cams, and one hand
generator, which is equipped with
automatic shunting device arranged to
be used IN connection with power
generator. The hand generator being
cut out automatically except when the
crank is being turned. The transmltter
is easily adjusted to suit the convent
ence of the operator.
The drops and jacks are self-con-
tained, and the solid block Of hard
rubber in which the jack is built and
upon which the drop is mount
ed affords perfect insulation,
which. we all know, is one Of the
most essential features of switch
board. Any single drop and jack may
be easily removed without disturbing
any other connection.
The board has an absolutely relia-l
Bile night-alarm arrangement. In each
iodine board is installed one repeat
ing coil, which is wired in the cord
circuit.
Large boards are provided with a
most efficient and reliable trunking
system and larger proportion Of
cords and plugs
The Imperial phones were
awarded bronze medal at the Paris
Exposition. News and Courier,
March 9.