IMPROVED. MEANS OF INDICATING WEIGHT ON PLATFORM WEIGHING MACHINES AND WEIGHBRIDGES
Year: 1873

page_text: LETTERS PATENT to John Bartlett, of the City and County of Bristol,
Ironfounder, for the Invention of "IMPROVED. MEANS OF INDICATING
WEIGHT ON PLATFORM WEIGHING MACHINES AND WEIGHBRIDGES."
Sealed the 24th June 1873, and dated the 24th April 1873.
PROVISIONAL SPECIFICATION left by the said John Bartlett at the
Office of the Commissioners of Patents, with his Petition, on the
24th April 1873.
I, JOHN BARTLETT, of the City and County of Bristol, Ironfounder, do
hereby declare the nature of the said Invention for " IMPROVED MEANS
OF INDICATING WEIGHT ON PLATFORM WEIGHING MACHINES AND WEIGHBRIDGES,"
to be as follows:-
.
Hitherto in platform and similar weighing machines the counterpoise
weights hung on the rods suspended from the end of the steelyard have
usually had their denomination marked on the flat surface of the weights
themselves, and mistakes frequently occur in computing the value of the
weights so hung on the rod.

page_text: Now my Invention is designed to remedy this inconvenience, and
avoid the necessity for adding together the different values of the several
weights, the gross value being indicated at a glance without requiring
any calculation. For this purpose I provide the rod on which the weights
are hung with a proper graduated indicator scale marked or fixed thereon, 5
and make the counterpoise weights all of the same diameter, but of
different thicknesses, so that the gross value of whatever weights may be
hung on the rod will be at once indicated on the scale.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said John Bartlett in the Great Seal Patent Office on 1
the 23rd October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
BARTLETT, of the City and County of Bristol, Ironfounder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 1
Letters Patent, bearing date the Twenty-fourth day of April, in the year
of our Lord One thousand eight hundred and seventy-three, in the thirty
sixth year of Her reign, did, for Herself, Her heirs and. successors,
give and grant unto me, the said John Bartlett, Her special licence that
I, the said John Bartlett, executors, administrators, and assigns, or
such others as I, the said John Bartlett, my executors, administrators,
and assigns, should at any time agree with, and no othors, 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 "IMPROVED MEANS OF INDICATING WEIGHT
ON PLATFORM WEIGHING MACHINES AND WEIGHBRIDGES," upon the condition
(amongst others) that I, the said John Bartlett, 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 thic 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 calender months next and immediately after the date
of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said John Bartlett, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Sheet of Drawings
hereunto annexed and to the letters and figures marked thereon (that is
to say):
Hitherto in platform and similar weighing machines the counterpoise
weiglits hung on the rod suspended from the end of the steelyard have
usually had their denominations marked on the flat surface of the weights
themselves, and mistakes frequently occur in computing the value.
Now my Invention is designed to remedy this inconvenience, and to
avoid the necessity for adding together the different values of the several.
weights, the gross valuo being indicated at a glance, without requiring
any reference to the weights or any calculation whatever. For this
purpose the rod on which the weights are hung is provided with a
properly graduated indicator scale marked or fixed thereon, and the
counterpoise weights are all made of the same diameter but varying in
thickness proportionately to their difference of value, so that the gross
value of whatever weights may be hung on the rod will be at once
indicated on the scale.
In the accompanying Drawings I have illustrated a weighing machine
provided with the improvement of my Invention, which is applicable to
all descriptions of weighing machines in which a steelyard is used in
combination with detached weights.
In Figure 1, A is the steelyard, and B the rod, suspended from its
extremity, on which the counterpoise weights C are hung. This rod B
is preferably made flat (although it may be of round or othe shape),
and upon it is fixed or marked a scale suitably divided. The principal
divisions represent tons, cwts., or other standard weight (according to
the capacity of the machine), and the smaller divisions the aliquod parts
thereof. The counterpoise weights are made equal in thickness to one
or more divisions or subdivisions on the scale, according to their denomi-
nation. Thus, suppose the divisions and subdivisions on the scale. to
represent cwts. and quarters for instance, as in the Drawing, weights of
say two cwts., one cwt., two quarters, and one quarter respectively equal
in thickness to two, one, one half, and one quarter divisions on the scalo .
would be used, and so on for weights of any denomination. Thus what-

page_text: ever may be the number of weights upon the rod B the total amount
which they represent will be indicated by the first line visible above the
weights, and may be read off at once, as in Figure 2. The smaller
weights not indicated on the above scale, i.e., lbs. or ozs., as the case may
be, are indicated by the usual runner along the steelyard.
Having described the nature of my Invention, and the manner in
which the same is to be performed, I declare that what I claim as my
Invention to be protected by the herein-before in part recited Letters
Patent is, the employment of weights varying in thickness in proportion
to their difference in value, in combination with a scale divided to
correspond upon the rod on which said weights are hung, substantially
as and for the purpose specified.
In witness whereof, I, the said John Bartlett, have hereunto set
my hand and seal, this Twenty-first day of October, in the year
of our Lord One thousand eight hundred and seventy-three.
TATT
TAROT TA