A NEW OR IMPROVED INSTRUMENT POR MEASURING AND REGISTERING THE FORCE OR PRESSURE OF THE WIND.
Year: 1874

page_text: LETTERS PATENT to Robert Ballingal, of Eallabus House, Islay, North
: Britain, for the Invention of "A NEW OR IMPROVED INSTRUMENT
POR MEASURING AND REGISTERING THE FORCE OR PRESSURE OF THE
WIND.
Scaled the 28th August 1874, and dated the 4th April 1874.
PROVISIONAL SPECIFICATION left by the said Robert Ballingal at the
Office of the Commissioners of Patents, with his Petition, on the
4th April 1874.
I, ROBERT BALLINGAL, of Eallabus House, Islay, North Britain, do
hereby declare the nature of the said Invention for "A NEW OR
IMPROVED INSTRUMENT FOR MEASURING AND REGISTERING THE FORCE OR
PRESSURE OF THE WIND," to be as follows:-
This Invention consisting of a new or improved instrument for
measuring and registering the force or pressure of the wind, relates
more particularly to the employment of mercury as the resisting medium
to the action of the wind, the instrument being constructed as follows: ;-
A flat disc or plate of known area which is to be kept facing the wind

page_text: and upon which the wind acts to actuate the instrument, is attached at
its centre to a horizontal rod working between two or more pairs of
guide rollers to reduce the friction in the forward and backward move-
ment of the rod as it is actuated by the varying pressure of the wind.
To the under surface of this rod and at any convenient point in its
length, I attach by means of a link a sort of bell-crank lever centred
directly beneath the said rod, and thus capable of receiving motion from
it. The arms of this lever extend on either side of its pivot or centre
and underneath the disc rod, and are of unequal lengths.
The shorter is weighted by a sliding back balance weight so as to
counteract friction and exactly balance the bell-crank lever and longer
arm, and to the extremity of the said longer arm is jointed a vertical
rod which may be made to work in a parallel motion. To the end or
lower extremity of this vertical rod I attach an inverted cone of wood,
cork, or other light material, which cone is made to descend by the
action of the wind which moves the levers into a vessel containing
mercury or quicksilver. This mercury acts as the resisting medium to
the action of the wind communicated through the bell-crank lever and
other connections. The motion imparted to the head of the bell-crank
lever will thus be in a vertical plane, and by providing it with a pointer
or indicator working on a graduated scale it will in its depression and
ascension indicate the varying pressure of the wind. The bell-crank
lever is made to work by a side stud another lever, which by being
made to push the indicator connected with it forward, and not to bring it
back, will leave the indicator or tell-tale at the maximum point of
pressure. A cord from the end of the disc rod opposite the disc is
passed over a pulley, and to this cord may be attached the necessary
test weights for proving the accuracy of the scales and proper adjust-
ment of the levers.

page_text: This lower lever is made to indicate on a scale the wind pressure
at any place convenient for viewing the index, which index is provided
with tell-tale pointers showing the then present and maximum
pressure of wind.
The time of the maximum, medium, and minimum wind pressure is
indicated by a piece of clockwork being made to move a plate or tablet,
the surface of which is covered with chemically prepared paper ruled
divisionally for time. The marker is a metal pencil or pen connected.
with the positive wire of the electric apparatus, and is acted on by the
motion of the bell-crank lever and its connections.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Ballingal in the Great Seal Patent Office on
the 3rd October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
BALLINGAL, of Eallabus House, Islay, North Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of April, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Robert Ballingal, Her special licence
that I, the said Robert Ballingal, my executors, administrators, and
assigns, or such others as I, the said Robert Ballingal, 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 "A NEW OR
IMPROVED INSTRUMENT FOR MEASURING AND REGISTERING THE FORCE OR PRESSURE
OF THE WIND," upon the condition (amongst others) that I; the said
Robert Ballingal, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and scals,
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

page_text: My Invention relates to a new or improved instrument for measuring
and registering the force or pressure of the wind, and consists more
particularly in the employment of mercury as the resisting medium to
the action of the wind, the instrument being constructed as follows :-
A flat disc or pressure plate of known area upon which the wind presses
to actuate the instrument is attached at its centre to the extremity of a
horizontal rod working between two or more pairs of guide rollers, to
reduce the friction of the rod as it moves to and fro by the varying
pressure of the wind. To this rod at any convenient point in its length
I connect by means of a link a sort of bell-crank lever centred directly
beneath the said rod, and thus capable of receiving motion from it.
The horizontal arm of this lever is extended to form a pointer, and to its
extremity is jointed a vertical rod (which may be made to work in a
parallel motion if desired), to the lower extremity of which is attached
an inverted cone of wood, cork, or other light material dipping into a
vessel containing mercury, in which it is immersed more or less according
to the force of the wind. This mercury acts as the resisting medium to the
action of the wind communicated through the bell-crank lever and other
connections. The horizontal arm of this lever is also extended on the
other side of the centre to carry an adjustable weight to counteract
friction and balance tlie longer arm of the lever. The motion imparted
to the head of the bell-crank lever will thus be in a vertical plane, and
by providing it with a pointer, as above mentioned, working over a
graduated scale it will in its depression and ascension indicate the
varying pressure of the wind. The bell-crank lever has a side stud
which pushes an indicator or tell-tale connected with it forward, and
leaves it at the maximum point of pressure. A cord may be attached
to the pressure plate rod at the end opposite the said plate and passed
over a pulley, and to this cord may be attached the necessary test

page_text: pointer centred at T and working over a scale U. This pointer is
worked by a side stud on the lever G, and pushes the indicator con-
nected with it forward but does not bring it back. V indicates the
position for the clock and electrical time index (not shown). The area
of the pressure plate P is proportionate to the leverage and the displace-
ment of the mercury by the plunger.
Having described the nature of my Invention, and the manner of
performing the same, I declare that what I claim as the Invention
to be protected by the herein-before in part recited Letters Patent
is,-
1st. The employment in combination with the pressure plate P and
suitable arrangement of levers and pointers of a plunger L dipping into
mercury as the resisting medium to the pressure of the wind on said
plate, substantially as and for the purpose herein specified.
2ndly. The particular combination of parts comprising the mechanism
contained in case A constructed, arranged, and operating substantially as
shown and described for the purpose specified.
In witness whereof, I, the said Robert Ballingal, have hereunto
set my hand and scal, this Thirtieth day of September, in
the year of our Lord One thousand eight hundred and seventy-
four.
DORT
ATדוד דד רד