IMPROVEMENTS IN OBTAINING MOTIVE POWER BY HYDRAULIC PRESSURE, AND IN THE ARRANGEMENT OF MECHANISM FOR SUCH PURPOSE
Year: 1871

page_text: LETTERS PATENT to Thomas James Smith, of the Firm of Robertson,
Brooman, and Company, of 166, Fleet Street, in the City of London,
Patent Agents, for the Invention of "IMPROVEMENTS IN OBTAINING
MOTIVE POWER BY HYDRAULIC PRESSURE, AND IN THE ARRANGEMENT OF
MECHANISM FOR SUCH PURPOSE."-A communication from abroad by
Pierre Folacci and Emile Lamie, of 23, Boulevard de Strasbourg,
Paris, France.
Scaled the 22nd December 1871, and dated the 11th September 1871.
PROVISIONAL SPECIFICATION left by the said Thomas James Smith
at the Office of the Commissioners of Patents, with his Petition,
on the 11th September 1871.
J, THOMAS JAMES SMITH, of the Firm of Robertson, Brooman,
6 and Company, of 166, Fleet Street, in the City of London, Patent
Agents, do hereby declare the nature of the said Invention for

page_text: "IMPROVEMENTS IN OBTAINING MOTIVE POWER BY HYDRAULIC PRESSURE, AND
IN THE ARRANGEMENT OF MECHANISM FOR SUCH PURPOSE," to be as follows:-
This Invention relates to obtaining power for moving vehicles and
mechanism generally by hydraulic pressure, and the arrangement of
mechanism for accomplishing such object.
.
A large cylinder of an hydraulic press is placed vertically in a
convenient position; its piston is provided with a rod furnished at the
end with a cross piece, to which a rack is keyed. This rack during
one-half the stroke of the piston gears into a pinion attached to the
lowest of three wheels, whilst during the descent of the piston the rack
is pushed from the pinion by a spring which prevents it gearing there-
with. This pinion actuates a wheel keyed to it, which in its turn
actuates a pinion upon a second wheel placed above it, and which gears
into another pinion attached to a third or topmost wheel. Over the
lowest wheel a link or Vaucanson chain passes which actuates the
mechanism to be moved, and over the topmost wheel another Vaucanson
chain passes which actuates a flying pulley, by means of which the
plunger of a small cylinder of the hydraulic press is worked by the
intermediation of a shaft or lever.
To render the system double acting two hydraulic presses are used
provided with similar mechanism. In this case one of the two pistons
descends while the other rises, and vice versa.
In order to render the movement of the two pistons regular these
rods are provided with auxillary racks which gear into little pinions,
gearing themselves in a common wheel placed between them, and which
consequently turns alternately in one direction and then in the other.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas James Smith in the Great Seal Patent
Office on the 9th March 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS 3
JAMES SMITH, of the Firm of Robertson, Brooman, and Company, of
166, Fleet Street, in the City of London, Patent Agents, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of September, in the

page_text: year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Thomas James Smith, Her special
licence that I, the said Thomas James Smith, my executors, adminis-
trators, and assigns, or such others as I, the said Thomas James Smith,
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN OBTAINING MOTIVE POWER BY HYDRAULIC PRESSURE;
AND IN THE ARRANGEMENT OF MECHANISM FOR SUCH PURPOSES," (a com-
munication to me from abroad by Pierre Folacci and Emile Lamic,
of 23, Boulevard de Strasbourg, Paris, France,) upon the condition
(amongst others) that I, the said Thomas James Smith, my executors
or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Thomas James Smith, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, that is to say:-
This Invention relates to obtaining power for moving vehicles and
mechanism generally by hydraulic pressure, and the arrangement of
mechanism for accomplishing such object.
The Invention will be well understood from the following description,
reference being had to the annexed Drawings..
Figure 1 is a side view in section, Figure 2 an end view, and Figure 3
a half plan of a vehicle or omnibus, to which my improvements are
applied.
A large cylinder a of an hydraulic press is placed vertically or other-
wise in a convenient position, its piston 6 is provided with a rod c,.
furnished at the end with a cross piece d, to which a. rack f is keyed.

page_text: This rack f, during one half the stroke of the piston gears into a
pinion attached to the lowest of three wheels, whilst during the
descent of the piston the rack is pushed from the pinion by a spring
which prevents it from gearing therewith. This pinion y actuates a
wheel keyed to it, which in its turn actuates a pinion i upon a second
wheel j placed above it, and which gears into another pinion k attached
to a third or topmost wheel 7. Over the wheel a link or Vaucanson
chain m passes, which actuates one of the hind wheels of the vehicle,
and over the wheel j in some cases another Vaucanson chain n passes,
which actuates a flying pulley o, by means of which the plunger of a
small cylinder p of the hydraulic press is worked by the intermediation
of a rod q and lever r.
To render the system double acting two hydraulic presses are used
provided with similar mechanism, as seen in Figure 2 and 3. In the
the arrangement described, one of the two pistons & of the two hydraulic
presses rises while the other descends, and so on, so that the continuous
motion of the two hind wheels of the vehicle is produced.
In order to render the movement of the two pistons regular, their:
rods are provided with auxillary racks s, s, which gear into little
pinions t, t, engaging themselves into a common wheel u placed between
them, and which consequently turns alternately in one direction and the
other.
Although the Invention has been described as applied to a vehicle by.
way of illustration, it is not intended to limit it to the production of
motion of that description only, since it will be readily understood that ?
it is capable of application to a great variety of purposes in which
motive power is required, and which it would be tedious to pareticulaize.
And having now described the nature of the said Invention, and in
what manner the same is to be performed, I declare that I claim,-
First. The general construction and arrangement of the apparatus or a
machine in which the hydraulic press is applied for the purpose of
obtaining motive power, substantially as described and shown in the
accompanying Drawings.
Secondly. The arrangement of the spring racks gearing into a pinion
during their ascent but not gearing in their descent, as described and a
shown in th

page_text: Thirdly. The mechanism as described and shown, connecting the
racks with the hind wheels of the vehicle and the toothed wheels with
the small cylinders of the hydraulic press.
Fourthly. The construction and action- of the regulator governing the
action of the pistons of the two hydraulic presses.
In witness whereof, I, the said Thomas James Smith, have hereunto
set my hand and scal, this Eight day of March, in the year of
our Lord One thousand cight hundred and seventy-two.