Recorder, Morse.
A telegraphic receiving apparatus for recording on a strip of paper the
dots and lines forming Morse characters as received over a telegraph
line. Its general features are as follows:
A riband or strip of paper is drawn over a roller which is slightly
indented around its centre. A stylus or blunt point carried by a
vibrating arm nearly touches the paper. The arm normally is motionless
and makes no mark on the paper. An armature is carried by the arm and an
electro-magnet faces the armature. When a current is passed through the
magnet the armature is attracted and the stylus is forced against the
paper, depressing it into the groove, thus producing a mark. When the
current ceases the stylus is drawn back by a spring.
Fig. 285. INKING ROLLER MECHANISM OF MORSE RECORDER.
In some instruments a small inking roller takes the place of the stylus,
and the roller is smooth. The cut, Fig. 285, shows the plan view of the
ink-roller mechanism. J is the roller, L is the ink well, Cl is the arm
by which it is raised or lowered by the electro-magnet, as in the
embosser. S S is the frame of the instrument, and B the arbor to which
the arm carrying the armature is secured, projecting to the right. A
spring is arranged to rub against the edge of the inking roller and
remove the ink from it.
The paper is fed through the apparatus by clockwork. At the present day
sound reading has almost entirely replaced the sight reading of the
recorder.
Recorder, Siphon.
A recording apparatus in which the inked marks are made on a strip of
paper, the ink being supplied by a siphon terminating in a capillary
orifice.
In the cut N S represents the poles of a powerful electro-magnet. A
rectangular coil bb of wire is suspended between the coils. A stationary
iron core a intensifies the field. The suspension wire f f 1 has its
tension adjusted at h. This wire acts as conductor for the current.