Weekly expositor. (Brockway Centre, Mich.) 1882-1894, 1893-09-08
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MURRAY's PRINTING TELEGRAPH.

MURRAY PRINTING JELEGEAIH.
makes electrical contact, thus energiz-
ing a particular electro magnet which
operates certain type key. Thirty
two transmitting elements connected
in parallel form the transmitter, and
thirty two interpreting clements form
the interpreter, and these are COM
bined with a shift key device, shown
in the right hand corner of the picture,
a typewriter and battery. The illus
tration represents the complete APP
paratus for one station-the transmit
ter, interpreter, shift key mechanism
and typewriter together with main
switch controlling the several circuits,
galvanometer which indicates
whether or not a current is passing
through the main line, and q signal
bell.
- The TRANSMITTED has a series of keys,
as seen on the left in the picture, each
key consisting of rod operating
peculiarly constructed pole changer,
and comprises a commutator having
on one side parallel rows of stationary
contacts,eonnected in parallel with the
line, and having portion of the ON
nections crossed, the commutator hav-
ing it's top surface inclined and it's
lower surface inclined at right angles
to the inclination of the top SUFFICE,
a key sliding adjacent to the commu-
tator, and contact block having
spring connection with the key-c trry-
ing contacts adapted to connect with
source of electricity, the contact
block being arranged to move down
ward on one side of the commutator,
and to slide inward and move upW ard
so as 10 make contact with
the contacts of the commu-
tator. The interpreter, the detail of
which is shown in the small figure,
comprises a series of electro magnets
adapted to connect with a line, circuit
closing and swinging quadrants being
arranged adjacent TO the electro-mag-
nets, and dapted when released to
close the circuit through mechanism
for printing a character or operating a
key of keyboard machine, each quad
rant having a series of teeth in a diff
ferent combination from the teeth of
any other quadrant in the series.
Swinging detents adapted to be actu-
ated by the magnets engage the teeth
of the quadrants, and electrically and
automatically rotated shafts adapted
to be set in motion by the closing of
the circuit in which the quadrants are
arranged carry mechanism to return
the quadrants to locked position.
One of the transmitter keys oper-
ates the space key of the typewriter
and three other transmitter keys oper-
ate the shift key mechanism, shifting
to capitals, lowercase or figures.
When the paper carriage of the type
writer comes to The end of a line, it
may be returned by the attendant at
the receiving station or by an auto
matte mechanism provided for this
purpose. The galvanometer on the
main line at each station indicates
when a current is passing. When the
instruments are not in use the bells
are put in circuit, and, when the in
terpreters are left in circuit, the oper-
ator at either station can send a mes
sage to the other station where it will
be recorded on the typewriter with
out an attendant be ng present, the
process being automatic and it being
necessary only to provide sufficient
amount of paper n the typewriter to
receive the message.