IMPROVEMENTS IN HYDRAULIC APPARATUS FOR THE REPRODUCTION AT A OF CHARACTERS, SIGNS, DELINEATIONS AND MOTIONS to be as DISTANCE follows
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I THEODORE TUBINI of 29 Ladbroke Gardens, Notting Hill in the County of
Middlesex, Gentleman, do hereby declare the nature of my invention for
IMPROVEMENTS IN HYDRAULIC APPARATUS FOR THE REPRODUCTION AT A
OF CHARACTERS, SIGNS, DELINEATIONS AND MOTIONS to be as
DISTANCE
follows:-
"
My Invention relates to an improved apparatus for the reproduction at a
distance of autographic or other characters signs and motions, and it consists in
improvements upon the hydraulic writing apparatus for which Letters Patent were
granted to Melville Thomson Neale dated February 23rd 1883 No 985 whereby the
construction and operation of the apparatus are simplified, and improved, and its
field of action considerably increased.
As in the former apparatus the transmitting and receiving instruments being
identical in every respect it will be sufficient to describe one of them, it being
understood that the cylinders of the one instrument are connected to the corre-
sponding cylinders of the other instrument by non-elastic pipes charged with a
suitable liquid.
According to my present Invention the two cylinders of either instrument
instead of being placed at an angle and mounted to oscillate on centres are fixed
and parallel to one another, and instead of being furnished with pistons they have
long plungers working in them through suitable stuffing boxes, whereby the range
of the instrument is considerably increased and leakage is prevented.
These stuffing boxes consist of enlargements on the ends of the cylinders fitted
with screw caps through which the plungers pass.
The plungers instead of being connected to a common centre coincident with the
stylus as in the aforesaid patent are coupled by connecting rods or links to the
opposite ends of a beam whose centre of oscillation is guided in a right line
parallel to the cylinders, so as to be capable of motion in that line only whilst the
ends are free to partake in the same motion and also to oscillate about the centre
the two motions being combined or separate according to the direction in which
the stylus is moved. To this beam is attached a rigid arm which projects from the
centre of motion at right angles to the beam at the extremity of which arm is
D

page_text: carried the writing stylus. This arm is of sufficient length to afford the necessary
command over the working parts of the instrument to enable the writing to be
executed in a free and legible manner.
The instrument as above described is single acting the inward motion of the
plungers at the receiving end being dependent on the atmospheric pressure but the
cylinders might be made double acting or duplicated in each instrument, and
connected with the same stylus the pipe connections being also duplicated and
forming so to speak complete or closed circuits in which both the motions trans-
mitted to the mechanism of the receiving instrument is in all cases dependent only
upon the internal pressures produced by the manipulation of the transmitting
instruments. By means of this duplex arrangement the inconvenience that might
arise by reason of differences of level between the transmitting and receiving
stations are provided for.

page_text: COMPLETE SPECIFICATION.
I, THEODORE TUBINI of 29 Ladbroke Gardens, Notting Hill in the County
of Middlesex, Gentleman do hereby declare the nature of my invention for
"IMPROVEMENTS IN HYDRAULIC APPARATUS FOR THE REPRODUCTION AT A
DISTANCE OF CHARACTERS, SIGNS, DELINEATIONS AND MOTIONS" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My Invention relates to an improved hydraulic apparatus designated á hydro-
graph for the reproduction at a distance of autographic or other characters signs
and motions, and it consists in improvements upon the hydraulic writing apparatus
for which Letters Patent were granted to Melville Thomson Neale dated
February 23rd 1883 No 985 whereby the construction and operation of the
apparatus are simplified, and improved; and its field of action considerably
increased.
The transmitting and receiving instruments are identical in every respect and
it will therefore be sufficient to describe one of them, it being understood that the
cylinders of the one instrument are connected to the corresponding cylinders of the
other instrument by non elastic pipes charged with a suitable liquid.
According to my present Invention the cylinders of the instrument instead of
being placed at an angle and mounted to oscillate on centres, are fixed and parallel
to one another, and instead of pistons they have long plungers working in them
whereby the range of the instrument is considerably increased and leakage is
prevented, and the plungers instead of being connected to a common centre
coincident with the pencil as in the aforesaid patent are coupled by connecting
rods or links to the opposite ends of a beam whose centre of oscillation is guided
in a right line parallel to the cylinders, and whose ends are free to partake in the
same motion and also to oscillate about the centre, the two motions being combined
or separate according to the direction in which the pencil or writing instrument
carried at the end of a third arm on the said beam, is moved.
Reference is to be had to the accompanying drawing which represents in plan a
pair of double acting instruments that is to say instruments each provided with
two pairs of oppositely acting cylinders the transmitting and receiving instruments
which are placed at any desired distance apart thus working in a completo
bydraulic circuit but it will be understood that the instruments may have one pair
of cylinders only in which case they would be partly dependent on atmospheric
pressure for their action. Each instrument acts in turn as transmitter and
receiver.
Referring to one of the instruments A A¹ is one pair, and B B¹ the other pair of
oppositely directed cylinders the two pairs being fixed on a suitable base board
and parallel to one another. The cylinders A may however be in line with
those B. a a and b 6¹ are the plungers of the respective cylinders, the cylinders
and their plungers being of a length greater than that of the line of writing to be

page_text: executed. The plungers work through suitable glands and stuffing boxes, the
pair a a¹ being connected by joints and links c to the opposite ends of a beam d
pivoted at the middle of its length d² to the end of a rod e sliding in guides f
parallel to the cylinders. Whilst the other pair bb' are connected directly to the
ends of a rigid crosshead d¹ on the opposite end of said sliding rod e. The beam d
is provided with a third arm g extending from its centre of motion d² at right
angles to the beam at the extremity of which arm is carried the pencil p. or writing
instrument in such position as to enable writing or other delineations to be
executed on a sheet of paper laid upon the base board. This arm is of sufficient
length to afford the necessary command over the working parts of the instrument
to enable the writing etc to be executed in a free and legible manner. h, h¹, ii¹
are the tubular connections between the corresponding cylinders of the two
instruments for transmitting and receiving.
I would observe that by the duplex arrangement of cylinders and pipes herein
described the pressure due to difference of level between the transmitting and
receiving stations is balanced but if the instruments be single acting the method of
compensation for difference of level described in another application for Letters
Patent dated July 12 1884 N° 10,088 might be adopted.
Having now particularly described and ascertained the nature-of-the-said
invention and in what manner the same is to be performed I declare that what
I claim is
:
1st In a hydrograph or hydraulic instrument for the reproduction of autographic
or other characters &c at a distance, the parallel arrangement of the cylinders and
the employment of plungers in lieu of pistons therein whether the instrument be
single or double acting substantially as shown and described and for the purpose
specified.
2nd In a hydrograph or hydraulic apparatus for the reproduction of autographic
or other characters &c at a distance the combination of a pair of parallel .cylinders
their plungers and the three armed lever carrying the pencil and connected to the
plungers and guided substantially as shown and described.
3rd In a hydrograph or hydraulic apparatus for the reproduction at a distance of
autographic or other characters &c the combination of two pairs of oppositely
acting cylinders whose plungers are connected together and to the writing lever
for operation as specified and the combination of two such instruments having
their cylinders connected by two pairs of pipes substantially as shown and a
described.