IMPROVE- MENTS IN HYDRAULIC APPARATUS FOR THE REPRODUCTION AT A DISTANCE OF " CHARACTERS, SIGNS, DELINEATIONS AND MOTIONS
Year: 1885

page_text: I, THEODORE TUBINI of 29 Ladbroke Gardens Notting Hill in the County of
Middlesex, Gentleman, do hereby declare the nature of my invention for "IMPROVE-
MENTS 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 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 I made application
for Letters Patent on the 28th June 1884 N° 9550. As in the former apparatus,
the transmitting and receiving instruments are identical, and it will therefore be
sufficient to describe one of them only, 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 parallel to one another, are fixed at an angle, and their plungers;
instead of being worked by a beam provided with an arm to which the stylus is
attached, are worked by a system of jointed rods or levers acting in the manner of
lazytongs whereby the motions of the plungers are small relatively to those of the
writing instrument which operates them, the leverage thus obtained rendering the
operation of writing much easier.
The
Reference is to be had to the accompanying drawing forming part of this
specification which represents a plan of one of the pair of instruments.
instrument hereinafter described is double acting, that is to say, is provided with
two pairs of cylinders acting in opposite directions and working in complete
bydraulic circuits so that the motions of the receiving instrument are in all cases
dependent only upon the internal pressures produced by the manipulation of the
transmitting instrument, but the instrument might be single acting, if desired.
a a¹ are a pair of cylinders fixed at right angles to one another upon a suitable
baseboard and b b are a similar pair of oppositely directed cylinders in line
with a a¹ and fixed to the same baseboard the two pairs of cylinders being
respectively connected by pipes c c and d d¹ with the corresponding cylinders of
the other instrument.

page_text: The cylinders a a, b b¹ are provided respectively with rams or plungers e which
work through suitable glands and stuffing boxes and are connected by pins and
slots with cross levers g g pivoted together at h upon a common axis fixed to the
baseboard, the levers being jointed at their other extremities i to another pair of
rods pivoted together at point k at which the pencil or writing instrument is
carried, the system of rods and levers forming a parallelogram and constituting
a sort of lazytongs whereby motion of the writing instrument in any direction in
the plane of the lazytongs causes the plungers of cylinders a and a¹ or one of them
to be forced in or drawn out as the case may be and the plunger of the opposite
cylinder or cylinders 6 6¹ to be moved to the same extent in the opposite direction
the motions of the various plungers being transmitted by the liquid with which
the connecting pipes are charged to the cylinders of the receiving instrument
whereby the notions of the pencil of the transmitting instrument are reproduced
by that of the receiving instrument, each instrument acting in turn as transmitter
and receiver.
:
When the distance between the two instruments is so great that the otherwise
imperceptible compressibility of the liquid might interfere with the instantaneous
transmission of the motion I compress the water in the pipes to such a degree as to
avoid all further compressibility during the working of the apparatus, by any
suitable means such for instance as a screw so applied as to displace a portion of
the liquid in a chamber in connection with the pipe.
By omitting the cylinders 6 b¹ in each instrument and their connecting pipes the
apparatus is rendered single acting in which case it would be provided with the
means of compensating the pressure due to the difference of altitude between
the transmitting and receiving instruments described in another application for
Letters Patent dated July 12th 1884. No.10088.
I would observe that I do not limit myself to the proportions of the different
parts of the instrument herein represented as the same may be varied.
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 The arrangement of the cylinders and rams and their combination with the
system of lazy tongs levers (whether the instrument be single or double acting) for
operation substantially in the manner and for the purposes specified.
2nd In a hydraulic writing apparatus for the reproduction at a distance of
characters signs delineations and motions subjecting the liquid by which the
motions of the one instrument are transmitted to the other to pressure in order to
avoid retardation or other interference with the transmission of the motion due to
compressibility of the liquid as specified.