A NEW INSTRUMENT FOR GAUGING MALT, AND ALSO FOR GAUGING THE FLUID OR SOLID CONTENTS OF CASKS AND OTHER VESSELS
Year: 1838

page_text: AND
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ABRAHAM
PARKER, of Gower Street, Bedford Square, London, Surveyor, and OLIVER
BYRNE, of the same Place, Professor of Mathematics, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Tenth day of March, in the first year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto us, the said Abraham
Parker and Oliver Byrne, Her especial license that we, the said Abrahamı
Parker and Oliver Byrne, our exors, admors, and assigns, or such others as we,
the said Abraham Parker and Oliver Byrne, our exors, admors, or assigns,
should at any time agree with, and no others, from time to time and at all
times during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, and also in all Her said Majesty's Colonies and Plantations
abroad, our Invention of "A NEW INSTRUMENT FOR GAUGING MALT, AND ALSO FOR
GAUGING THE FLUID OR SOLID CONTENTS OF CASKS AND OTHER VESSELS;" in which
said Letters Pátent is contained a proviso, obliging us, or one of us, the said
Abraham Parker and Oliver Byrne, by an instrument in writing under our, or
one of our hands and seals, particularly to describe and ascertain the nature of
our said Invention, and in what manner the same is to be performed, and to
cause the same to be enrolled in Her said Majesty's High Court of Chancery
within six calendar months next and immediately after the date of the said
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Abraham Parker and Oliver Byrne, do hereby declare the nature of our said

page_text: Invention to consist in applying a vernier or nonins to what is commonly
called Gunter's line or gauging instruments, and by this means prolonging the
results of calculations given on sliding rules and other instruments used for like
purposes to a far greater extent than has heretofore been done; and in further
compliance with the said proviso, we, the said Abraham Parker and Oliver
Byrne, do hereby describe the manner in which our said Invention is to be per-
formed, by the following statement thereof, reference being had to the Drawing
annexed, and to the figures and letters marked thereon, that isto say :-
DESCRIPTION OF THE DRAWING.
Figure 1 represents a circular gauging instrument with our Invention
applied thereto; it consists of two plates of brass, box, or any other substance
that may be thought best suited for the purpose, the inside circular piece
H, H, H, is imbedded in the outer one, so as to make the one smooth surface;
m, n, is an index passing over these two plates, and this index and the inner
plate move freely round the same centre at S; the screw or clamp at S is so
constructed as to be able to stop the motion of the index and plate H, A, ¤,
which leaves all the parts of the instrument stationary; at T there is another
screw, which moves in the groove 9, 9, for the purpose of making the index
fixed, and allowing it and the inner circle to move together, when necessary.
The parts r, n, and t, n, are bevelled, and meet in a point at n, the part
m, o, at the other end of the index, is also bevelled, and in a right line with n, r;
on this end is the vernier v, e, which moves over the divisions on the line A
and covers one-third of them in its motions; both the line H, on the inner
plate, and c on the other, are Gunter's lines, or lines of numbers; the line F is a
line of double radie, and contains the squares of the numbers expressed on H,
the line denoted by D is for the purpose of measuring malt; C and B are two
allaying lines, the one for segments standing, the other for segments lying; the
line A, as mentioned above, is to work in accordance with the vernier; with the
lines already named there may be others placed on the instrument, if necessary,
such as a line of cubes &c.; Figure 2, shows a cross section of the said circular
gauging instrument, taken at right angles with the index; S, the centre screw
or clamp; 9, 9, the groove in which the screw T moves; H, H, the section of
the inner plate. Figure 3 represents our Invention when applied to the
common flat sliding rule, generally used by excise officers; the two lines K, L,
and X, W, at each side of the rule, answers the same purpose as the line A,
described in Figure 1, viz, for the vernier to work upon; r, m, and n, o, are
two verniers, sliding in two grooves, which are made from one end of the rule
to the other; Z is a bar connecting the two verniers, and which also serves to
keep the rule from warping or giving ou from the slides; the romainder o

page_text: the rule is occupied with the same lines as the circular instrument. Figure 4
shews an hexagonal gauging instrument; the space at W denotes its cross
section, and a, b, c, and d, four sliding pieces, the other two remaining; and
opposite sides, in which there are no slides, are occupied by the lines to which
the vernier is applied; A, B, is a belt or girdle of brass or other ductile metal,
about one inch broad; in this belt are cut two apertures (as m, n,) in such a
manner as to let the lines last mentioned appear through these openings as
the girdle passed freely over the instrument; the sides of the apertures are
bevelled, and on them are constructed the verniers. And now having
described our Invention as applied to various shaped gauging instruments, we
do hereby claim as our Invention a vernier or nonins applied to Gunter's line
or gauging instruments, thereby constituting a new instrument for gauging;
and such our Invention being to the best of our knowledge and belief entirely
new, and never before used within that part of Her said Majesty's United
Kingdom of Great Britain and Ireland called England, Her Dominion of
Wales, and Town of Berwick-upon-Tweed, nor in any part of Her said
Majesty's Colonies and Plantations abroad, we do hereby declare this to be
our Specification of the same, and that we do verily believe this our said
Specification doth comply in all respects fully and without reserve or disguise
with the proviso in the said herein-before in part recited Letters Patent
contained; wherefore we do hereby claim to maintain exclusive right and
privilege to our said Invention.
In witness whereof, the said Abraham Parker bath hereunto set his
hand and seal, this Tenth day of September, in the year of our Lord
One thousand eight hundred and thirty-eight
ABRAHAM (L.S.) PARKER.
AND BE IT REMEMBERED, that on the Tenth day of September, in-
the year of our Lord 1888, the aforesaid Abraham Parker came before our
said Lady the Queen, in Her Chancery and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Inrolled the Tenth day of September, in the year of our Lord One
thousand eight hundred and thirty-eight.