Omaha daily bee. (Omaha [Neb.]) 187?-1922, 1906-10-07

| trical engineer, inventor OF sew
eral useful innovations in the field
LH487I Of electro-technics, claims far
49, reaching Improvement in practical
telegraphy. BY very simple means 1t is as
serted that defective insulation can be
overcome and the capacity of the wires
or leads can be vastly increased. Per-
haps. II substantiated, the most important
claim il that which has reference to injured
cables. since it is stated that these can
DO again brought into service. II this in
vention fulhis all that Is anticipated, says
Aths Boston Transcript. great impulse will
Undoubtedly be given to the science Of
telegraphy. Slgnor Magini has recently
han devoting much study to the operation
of the coherer inserted above a telegraphic
wire subjected to electric vibrations origi-
mating from low power induction coil.
His observations have led him to the
discovery Of an extremely simple arrange
ment. which he thinks solves various prob
lens still existing in everyday telegraphy.
In addition TO this. the device works equally
well whatever the distance between the
telegraph stations and whatsoever the ma
terial condition may be to the wires in
use on existing lines. There would thus be
no need to make alterations IN existing SER
vices. but Il may be pointed out that with
the new system telegraphic communication
may also be carried out under existing gen.
eric conditions by means of very thin wires
instead of the thick and expensive conduc-
tors or "leads" now generally employed-a
point Of exceptional Importance. especially
In connection with the erection OF new in
stallationF. All competent persons will at
: once recognize the Importance of the inno-
walton from the above brief remarks as to
the actual conditions of telegraphic wires
As a matter of fact, interruptions In tele-
graphic services depend almost always upon
defective insulation OF the conductors (es-
pecially during bad weather.. upon short
circuits or upon 'earths;" fortunately, all
these causes have no effect at all upon the
transmission of the new currents selected
and practically employed by Signor Maglni.
= These currents are of an oscillating charac-
ter and neither disturb nor are disturbed
Ably ordinary currents--a fact the signii-
canoe OF which cannot escape the attention
OF those who understand anything about
telegraphy; furthermore they have the
singular property OF rapidly passing over
electric conductors even when such
'Teads'' are imperfectly insulated whether
due to bad weather or other causes) or II
they have not been insulated at all. and
also II short-circuited to earth. or IL the
continuity be interrupted. To put the mat
ter briefly. the new "Magini system" in
sures perfect telegraphic communication
under even the worst possible conditions in
the electric status OF the leads.
Maginrs transpftter comprises small
Rhumkorff coil. into the primary circuit of
which there are directed, by means OF a
special key. the currents emanatlng from a
few cells OF some dry batteries. whilst one
OF the terminals OF the secondary circuit
Is placed In communication with the lead.
The current induced, by a special arrange
ment OF the circuit. which is as simple as
II is original Cloth at the transmitter and
receiver enis), is transformed into a
vibratory nulsating curreat. At the receiv-
ing station it reaches a coherer OF spkcial
construction and caused the operation OF
any suitable Geographic apparatus, using
either Morse signals or printing signs on
the Hughes principle. This coherer (Which
apparently diners entirely from all eoherers
hitherto known establishes or breaks It's
coherency with rapIdity and certainty; once
placed in operation IL continues TO work
with perfect precision. all the drawbacks
(such as excessive senstiveness, always
causing great variability common to other
types so far known having been success
fully done away with. This new eoherer
will. therefore. be OF great value for use
IN connection with wireless telegraphy.
Although only a few volts are used at the
Transmitting station, and while there are
honly two dry cells at the receiving center.
messages can be safely forwarded over
distances amounting 10 hundreds OF miles:
hence with the new Maginl system the
use OF cumbersome and expensive batteries
OF cells or accumulators at Geographic
stations becomes thing of the past.
Tho new system practically admits of
auplex teIegraphy. without recourses to the
actual complicated means employed-means
which neosssitate scientific and special tech
1pi9al knowledge on the part Of the EN-
k1ove. and which. furthermore. are ex-
bosed 10 all those multiple causes which in
aucs notifications In the electric condition
AZ the wires. thus necessitating continual
yar.ation and readjustment OF the electric
accord existing between the different 0fncss