The Goldfield news and weekly tribune. [volume] (Goldfield, Nev.) 1911-1947, 1914-06-27
Mine TELEPHONES ARE
The WORK Of GERMAN INVENTOR

The following is an abstract of an
article by T. NJ. Winstanley Wallis
that appeared recently in the Engi-
neering and Mining Journal:
The unique system of telephoning
here described was invented by Herr
Reineke in Germany, in the attempt
to overcome the difficulties resulting
from broken wires in ordinary sys-
TENS of telephony. His system has
now been in regular use for two
years in the Carolinengluck Pit, b.
chum, Westphalia. where no other
method of signaling is used. The
Wireless Telephone Co., Ltd, Lon
uon, is the owner of the British and
colonial patents.
The invention seems to be entirely
original: in fact, the German patent
office did not at first believe it to be
practicable, but, on it's being demon
strated, granted a patent without re-
strictions or anticipations being cit
ed. which is most unusual.
While called wireless" the sys-
tenn is entirely distinct from that
commonly used in wireless telegra-
ply.
In this system the transmission
and reception of speech occur in the
same name as in ordinary telephon-
ing, but there the resemblance ends.
Instead of the current from the
transmitter being conducted along
the wire to the receiver, it is con-
verified to high pressure by means of
a transformer contained in the tele,
phone case. The high pressure or
secondary winding of this transform
err is connected to the ordinary rails
or pipes in the mine and communi-
Gates to them a charge of electricity
which spreads ove the whole system
of rails, and varies with the fluctua-
lions of the primary current in the
transmitter circuit of the telephone.
1t is unnecessary to make any spe-
cial provision to insulate the rails or
pipes, or to connect the adjacent
lengths electrically.
1t is interesting to note that the
invention was led up to by the ris-
covery that the conditions of dis,
tribution of electric charges under
ground are entirely distinct from the
conditions that hold on the surface
of the earth, and the working of the
system largely depends on this fact,
which was demonstrated for the first
time by the inventor.
Speech can be received by connect
ing telephones to the rails or pipes
at any point of the system, by bridg-
ing sufficient length so as to obtain
a suitable difference of PRESSURE; by
connecting between the rails and
pipes, if thees exist: or, as is some
times convenient>in the case of port
able instruments, by connecting to
an antenna consisting of a loose coil
of wire, which may be laid on the
floor or hung on the timbers.
AS in the ordinary telephone, a
bell is used for calling attention, the
bell being operated by a specially de-
signed relay. On the button being
pressed at the transmitting stations,
all the telephone bells will ring, and
all the telephones can receive the
message by taking the receiver of
the hook, which operation cuts of
the bell and connects the receiver in
the usual manner. 1t is possible to
tune the relays so that each will re-
spond only to it's own particular sig
nal, and thus any n station can
be called, but in mining work this is
usually not necessary or desirable,
and the different stations are called
by giving one, two or three rings, as
prearranged, while it is always pos