IMPROVE- MENTS IN APPARATUS FOR WEIGHING
Year: 1874

page_text: LETTERS PATENT to Thomas Attwood Brockelbank, of No. 39, Great
Tower Street, in the City of London, for the Invention of "IMPROVE-
MENTS IN APPARATUS FOR WEIGHING.”
Sealed the 16th April 1875, and dated the 19th October 1874.
PROVISIONAL SPECIFICATION left by the said Thomas Attwood
Brockelbank at the Office of the Commissioners of Patents, with
his Petition, on the 19th October 1874.
I, THOMAS ATTWOOD BROCKELBANK, of No. 39, Great Tower Street,
in the City of London, do hereby declare the nature of the said Inven
tion for " IMPROVEMENTS IN APPARATUS FOR WEIGHING," to be as follows :—
The object of the Invention is to simplify the process of weighing
various articles.
According to my Invention the article to be weighed is suspended on
one side of the fulcrum of a lever, whilst on the other side a vertical rod
is applied to pass through a succession of surfaces or counterweights
with a button or key at the bottom of it. The lowest of these surfaces.

page_text: If the
is that intended to represent the smallest weighing desired.
weight of the article exceeds the weight of this lowest surface or counter-
weight such counterweight will be lifted up to the next surface, and if
the article exceeds in weight these two surfaces together the further
tilting of the lever will cause the vertical rod in its further motion to i
come in contact with another or other counterweights in succession,
depending on the extent of variation of weighing desired. These separate
surfaces acting as counterweights, and capable of being so lifted in
succession, will be supported whilst in a state of rest on stages or rests,
so that the counterweights may then be free one of the other, and 1
successive combinations of them will represent progressively increasing
weights, according to the purpose to which the weighing is applied.
Apparatus of the character described is applicable to weighing lettors,
coins, or for other business purposes or for domestic use, or the weighing
of goods or matters as suspended by cranes, and in a variety of other
ways.
T
dusted dise will indieste
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Attwood Brockelbank in the Great Scal
Patent Office on the 19th April 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
ATTWOOD BROOKELBANK, of No. 39, Great Tower Street, in the City of
London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of October, in the
year of our Lord One thousand eight hundred and seventy-four, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Thomas Attwood Brockelbank,
Her special license, that I, the said Thomas Attwood Brockelbank, my
executors, administrators, and assigns, or such others as I, the said
Thomas Attwood Brockelbank, 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

page_text: 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 APPARATUS FOR WEIGHING,"
upon the condition (amongst others) that I, the said Thomas Attwood
Brockelbank, 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 immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Thomas Attwood Brockelbank, 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 and to the Figures marked thereon, that is
to say :-
The object of the Invention is to simplify the process of weighing
various articles.
According to my Invention the article to be weighed is suspended on
one side of the fulcrum of a lever, whilst on the other side a vertical rod
is applied to pass through a succession of surfaces or counterweights
with a button or key at or towards the bottom of it. The lowest of these
surfaces is that intended to represent the smallest weighing desired. If
the weight of the article exceeds the weight of this lowest surface or
counterweight such counterweight will be lifted up to the next surface,
and if the article exceeds in weight these two surfaces together the
further tilting of the lever will cause the vertical rod in its further
motion to come in contact with another or other counterweights in suc-
cession, depending on the extent of variation of weighing desired. Theso
separate surfaces acting as counterweights, and capable of being so lifted
in succession, will be supported whilst in a state of rest on stages or
rests, so that the counterweights may then be free one of the other, and
successive combinations of them will represent progressively increasing
weights, according to the purpose to which the weighing is applied.
But that the Invention may be more fully understood I will by the
aid of the accompanying Drawings proceed to describe means pursued
by me in carrying the same into effect.

page_text: pan,
Figure 1 shows an external side view, and Figure 2 a side section of
apparatus arranged according to my Invention. In both Figures the
same letters indicate corresponding parts. a represents the scale in
which is placed the article to be weighed. This scale pan is formed with
projections a' on its opposite sides, in which are formed openings' to
receive the V supports 6¹, one from each side arm 6, and these side
arms 6 project from the centre or rocking shaft b³, which is formed at
its opposite ends with V pieces 6³ to rest, and so as to be capable of
rocking in openings or bearings formed for them in the side bearings c.
This centre or rocking shaft 6 is also formed with another or other
arms 64, from which is suspended the rod d, which passes through a
series of weights e, e, e, e, and at its lower end is provided with. an
enlargement d¹, which simply represents a counterweight to counter-
balance the weight of the scale pan a. The weight of any article applied
in the scale pan a will in causing that pan to descend cause the bar d to
rise, and in rising bring the enlargement & first under the lowest
weight e, and then if that weight is not sufficient to counterbalance the
weight of the article the further descent of the pan will cause the next
weight e to be acted upon and lifted, and so on in succession until the
weight of the article is counterbalanced by the weights e.
In order to preserve the horizontal line of the scale pan a there is
applied to it the vertical rod or fixed arm a², the lower end of which is
by pin joint f¹ connected to one end of the link f, the other end of
which is by pin joint f³ connected to a bearing from the stage or frame
of the apparatus. g is a pointer attached to the scale pan a, which in
moving in an opening formed in a fixed plate h will by graduations on
that plate corresponding with the various weights indicate the weight of
the article in the scale pan. i represents the stages or rests on which
the respective weights e are supported in a state of rest.
Figure 3 represents by plan and edge views one of the weights e.
Apparatus of the character described is applicable to weighing letters,
coins, or for other business purposes, or for domestic use, or the
weighing of goods or matters as suspended by cranes, and in a variety of
other ways.