Improvements in the Construction of Morse's Registering Telegraphic Instruments.
Year: 1898

page_text: Date of Application, 7th Apr., 1898--Accepted, 6th Aug., 1898
COMPLETE SPECIFICATION,
Improvements in the Construction of Morse's Registering Telegraphic
Instruments.
I, EUGENE DUCRETET, of 75, Rue Claude Bernard, Paris, France, Manufacturer,
do hereby declare the nature of this invention, and in what manner the same is
to be performed to be particularly described and ascertained in and by the follow-
ing statement:-
The present invention relates to certain improvements made in Morse's tele-
graphic receivers and the special object thereof is to provide a device for automatic-
ally throwing into and out of gear the usual clock-work actuating the feed roller
of the apparatus; furthermore this improved telegraphic receiver or indicator
is provided with a special adjusting device adapted to be easily and readily
operated in operation, and my improvements consist in the arrangement of parts,
hereinafter more fully pointed out and claimed.
In order that my invention be properly understood I have hereunto appended
an explanatory sheet of drawing in which I have illustrated, by way of example,
a construction of the improved apparatus embodying my invention.
Fig. 1 is a side view of the apparatus the lateral walls of the casing being re-
moved to better show the clock-work and automatic clutch device.
Fig. 2 is a front view of same.
Similar letters of reference denote corresponding parts throughout the figures.
The apparatus comprises the usual rectangular box enclosing the clock-work
for actuating the feed-roller M, an electro-magnet A operating the indicating
lever L L and another smaller box Ga preferably arranged above the former and
enclosing the means for actuating the clutch device.
The indicating lever L L of the receiver supported on the bearing P secured to
casing of the clock-work, carries the armature Pa of the electro-magnet A, and
the free end of this lever is adapted to rock between the stop-screws band b¹; said
screws being adapted to turn in nuts secured to the post Tr, commonly called
translation post" of the receiver; this post Tr is constructed in the usual manner
and forms, in conjunction with the lever L L a first system of relay; but in this
case the good working of the relay or translation requires a first class adjustment
of the lever L L and the stop-screw b', which is very difficult to be obtained and
impossible in operation. (The lever L L is controlled by the spring Ro the tension
of which may be adjusted by the nut R¹o.) These objections are overcome with my
arrangement which is very accessible and adjustable in operation, that is, during
the reception, and this adjustment is moreover independent from the aforesaid
adjustment of lever L L and stop b¹.
My improved arrangement consist in an arm L¹, made integral with the lever LL
and adapted to come into contact, at each attraction of the armature Pa by the
electro-magnet A. with a springy or resilient blade 7 secured to a stationary shoe Ea

page_text: and adjustable by means of the screw B as shown in Fig. 2. The arm L¹ is pro-
vided at its lower end with a small screw by means of which the contact between
said arm and the resilient blade is established and may be regulated. This
arrangement forms a second relay or translator which I use to move the various
parts of the apparatus, from which it produces its own disengagement by a local
battery. In ordinary telegraphy this translator with local battery produces the
disengagement; the line current acts only to attract the lever L L and to produce,
at the same time, the contact between vand l.
The clock-work of the apparatus is automatically thrown into and out of gear
in the following manner: Whatever may be the use of the receiver, the first contact
between the screw and the blade / acts on an auxiliary, electro-magnet H H with
local battery to produce the attraction of an iron bar Ar having a long throw or
travel, this attraction being effectuated either direct or through the intermediary
of an armature Ar¹; this auxiliary electro-magnet' HH, the iron bar Ar and the
armature Ar¹, are housed in a box placed above the clock-work, hereinafter
described.
...
In operation the iron bar Ar, through the intermediary of the armature Ar¹,
actuates a vertical rod r¹ pivotally secured to the free end of said armature and
carrying at its lower end a springy blader extending into the wheel-work of the
apparatus; when the armature Arl is at rest, that is, in depressed position, the
rod stops the wheel work; when this armature is attracted by the auxiliary
electro-magnet HH, the rod r¹ will be raised and disengages the wheel-work.
The clock-work of the apparatus may be composed of any suitable number of
wheels and pinions; one of the movers of this clock-work, the wheel R, rotating
at a comparatively low velocity, carries a stop-pin G, secured thereto and during
secured
the revolution of this wheel R, said' stop-pin G approaches another pin g
to the last mover of the clock-work; as shown in the drawing the pin g is secured
to the endless-screw V, which carries moreover a speed regulator a a, usually
used with this class of mechanism. The two pins g and G, cannot contact with
one another and act upon another except by the intervention of the springy
blade r, when Ar¹ is depressed. In this position the pin g engages the springy
blader and causes it to engage the pin G to stop the movement of the clock-work.
During the succession of the transmitted signs, the armature Ar¹ is subjected
to a series of attractions holding the springy blade r in a raised position, whereby
the clock-work is allowed to revolve. After the reception of the sign, the arma-
ture Ar being no longer under the influence of the auxiliary electro-magnet, the
springy blader moves downwards and at the next passage of the pin G, this latter
engages said blader and causes it to engage the pin g, whereby the movement
is stopped.
A complete revolution of the wheel R unrolls a certain length of paper to
receive the transmitted signs, which cover only a portion of this unrolled strip of
paper, thus automatically separating the successive telegrams without the interven-
tion of the telegraphist.
The up movement of the armature Ar¹ and therefore of the springy blader is
effectuated very quickly, whilst the down movement of these parts is checked by
the following arrangement. To the armature Arl is pivotally secured a pawl D,
held by a spring D'and operating in a ratchet Vo; this pawl D is adapted to
engage the ratchet Vo during the down movement of the armature Ar, whilst it
slides over said ratchet during the up movement of said armature; when the
ratchet Vo is operated by the pawl D, it moves a small wheel-work adapted to
suitably check the down movement of the blade r.
My improved apparatus is furthermore provided with a cam C adapted to be
operated from the outside of the box Ga for the purpose to hold the armature Ar
and therefore the stop r in raised position, thus. transforming the apparatus into
an ordinary Morse apparatus.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
In their general and particular applications conjointly or separately, the
various parts and arrangements of parts herein described for the purpose set forth,
reference being had to the drawings hereunto annexed..