AN IMPROVED PRINTING TELEGRAPE
Year: 1859

page_text: PROVISIONAL SPECIFICATION left by Warren Thompson at the Office of
the Commissioners of Patents, with his Petition, on the 4th February
1859.
I, WARREN THOMPSON, of 2, Rue Sainte Appoline, Paris (France), and of
45, Essex Street, Strand, London, do hereby declare the nature of the said
Invention for "AN IMPROVED PRINTING TELEGRAPE," to be as follows, and
consists of two parts, viz., the manipulator or instrument by which the
operator gives the dispatch, and the receptor. The manipulator consists of a
finger board containing a certain number of keys or touches which are
attached to a corresponding number of straight levers, these are connected
with an equal number of small rectangular metallic levers which are placed
in a circle round the arber of the escapement wheel of a common clock train
or movement, and directly under a horizontal wheel containing thirty little
pins which the levers are calculated to push out beyond the circumference of
the wheel whenever the keys or touches are acted upon by the operator, the
same touch that pushes out the pin corresponding with the letter on the type
wheel of the receptor, pushes in the pin that is against a fixed post and stops
the instrument each time that the last pin pushed out comes against it, and
thus prevents any further action until another letter is made, this double
motion of pushing in the preceding pin, at the same time that you push out
another is obtained by an apparatus placed under each of the straight levers.
The escapement and pin wheels are on the same arber and are put in motion
by a common clock train. The receptor is put in motion by two clock trains,

page_text: the first actuating the type wheel and bringing forward the letter in front
of the tampon to be printed, the second is to print the letter when brought
forward. The arber of the type wheel has an escapement and a ratchet wheel,
it is driven by a pinion loose upon the arber, but attached to it by means of a
spiral spring which the clock train keeps wound up, so that when the vibrations
commence this spring acts instantaneously and with a great degree of
elasticity. The type wheel is also loose upon the arber and is attached to it
by a coupling wheel, which has a sliding motion on the arber and contains
thirty teeth, by which the type wheel is attached by means of a little pin
which is hitched to bring forward the letter, and unhitched each time a letter
is printed; the type wheel flies back to its starting point by means of a spiral
or watch spring, which is placed and attached underneath, and pushes aside
by its momentum a little arm which prevents the coupling wheel falling until
the type wheel is entirely home. The ratchet wheel has also thirty teeth, and
serves in starting to raise a little lever or finger which, when the wheel stops
falls back to its place, and in so doing lets escape an arm which when liberated
makes a revolution sufficient to print a letter by means of a cam wheel con-
taining four cams on the fourth arber of a clock train, serving at the same
time to move forward the band of paper by means of a Maltese cross, to
receive the next letter and also to unhitch the type wheel by elevating a
forked lever which raises the coupling wheel.