IMPROVEMENTS IN. THE MEANS AND APPARATUS FOR THE TRANSMISSION AND REGISTRATION OF TELEGRAPHIC DESPATCHES
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Michel Doubelt at the Office
of the Commissioners of Patents, with his Petition, on the 5th
October 1872.-A communication from Pierre Kuiaghininsky,
Nicolas Sewastganoff, and Dmitry Dornowo, all of Saint Peters-
burgh, in the Empire of Russia.
I, MICHEL DOUBELT, of Saint Petersburgh, in the Empire of Russia,
General in the Russian Cavalry, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN. THE MEANS AND APPARATUS FOR THE
TRANSMISSION AND REGISTRATION OF TELEGRAPHIC DESPATCHES," (communicated
to me by Pierre Kniaghininsky, Nicolas Sewastganoff, and Dmitry
Dornowo, all of Saint Petersburgh, in the Empire of Russia,) to be
as follows:-
This Invention relates to means and apparatus whereby telegraphic
despatches may be transmitted from one station and printed as soon
as received at another, the object being to ensure the transmission of one
distinct signal or sign by each manipulation of the apparatus, whereby a
great advantage in point of speed is obtained over those apparatus
at present in use.

page_text: The chief feature in the Invention consists in the employment of a
cylinder which is marked out into a certain number of divisions, say
into twelve divisions along its length, and into forty round its circum-
ference; a portion of the compartments formed by these divisions are
enamelled, and on the other portion the metal is left exposed; this
roller is caused to revolve at a certain speed by means of clockwork
mechanism, or in any other convenient manner; it is mounted upon
a shaft or axis supported on a frame, which also bears at its lower part
another shaft or axis upon which outside the frame are mounted, isolated
from one another, two discs of slightly different diameters, which are
concentric and firmly united; to the outside of these discs a clutch
wheel is keyed, and on the extreme end of the axis another clutch wheel
in the teeth which fit into those of the first wheel is free to slide;
bearing upon the last mentioned clutch wheel is a fork of non-
conducting material connected to the armature of an electric battery,
as the armature is made to rise and fall in consequence of the current so
the fork forces the one clutch wheel to gear with the other clutch wheel
or relieves it therefrom on the pressure being removed. On each side of
the divided cylinder are cleven metal hooks, cach set of eleven being
mounted upon a metal plate and kept pressed by a spring or otherwise
against the cylinder; to each of these hooks are connected wires which
lead to the keyboard of the apparatus, the eleventh hook of each set being
connected respectively to the keys at either end of the keyboard; this
keyboard resembles that of a musical instrument, and upon each key
are marked the letters, numbers, signals, or signs, which can be produced
by touching the key to which they relate; the positive pole of the
battery is in connection with the two eleventh hooks of each series, and
with the keys by which they are governed, while the hooks of all the
other keys of the keyboard are in connection with the negative pole of
the battery.

page_text: which is a stop or projection which comes in contact with the upper
wheel in its revolution.
The system above described is more especially applicable to the
transmission of despatches through submarine or underground cables or
lines, but with some modifications it is applicable to ordinary land
lines;
the chief modification necessary for this purpose is in the
cylinder, which instead of being divided as already described, is divided
into a number of lines, in each of which the respective position of
two points form the signal according to the pre-arranged code, and
sundry modifications are necessary in the mode of conducting the
electric current.'