The telegraph manual: a complete history and description of the semaphoric, electric and magnetic telegraphs of Europe, Asia, Africa, and America, ancient and modern.

PATENTED IMPROVEMENTS. 719
it is swung sidewise, and the semi-circular part t// is thrown
upward, and the collar m is thereby raised and caused to raise
the fork i of the watcher-key h, and thus to break the circuit
which passes through the watcher, the pin h", and the plate g.
The hook 1' is obstructed by means of the elbow-levers v v,
which are connected with the knobs x x.
The inventor says: I do not claim any part or arrangement
with the use and result thereof, as far as already well known
and clearly specified.
But I claim, 1st, the prevention of the too early intermission
or restoration of the circuit in the use of self-intermission,
through the method by which a key-shuttle q, or its equivalent,
is not only stationary during the whole travel of the armature
K K', but also for a certain time afterward, so that the circuit,
during that time, remains either permanently broken or closed;
but afterward this shuttle is started and shoved by the indirect
influence of the motion of the armature through some devices,
till to the moment of breaking or restoring the circuit, and here
stopped; and the armature, and by that all oscillating mechanical parts, are obliged to reverse immediately.
2d. The manner of stopping the indtx of all instruments of
a circuit right opposite the desired letter, without disturbing or
preventing the index, armature, or shuttle of any instrument
to complete their adopted motion, by means of a " watcher" h
and "waker " 1, operated by the revolving hook /l and the
key-lever v, or its equivalent, in the manner specified. so that
the watcher will keep open; meanwhile the shuttle makes contact, whereby the indices stop until the key is relieved and the
watcher closes again.
3d. The method to keep all instruments of a circuit in unison working, and without any mechanical means, through employment of " the induction current," by retarding the influence of the electro-magnetic power at a certain degree upon
that instrument which intermits the circuit, and whereby the
other instruments of the circuit not having their intermitters in
activity, are governed by it, and insured to complete their motion before the circuit of the prime current is intermitted or
restored again.
The said induction current in each instrument being used in
connection with some suitable means for connecting and disconnecting the self-intermitter with the armature lever, and
also with a means for closing and opening the induction circuit,
an(d for the opening and closing of the accommodation course
of the prime current, which act together at once, answering
simultaneously their different purposes.