IMPROVEMENTS IN SELF-INDICATING WEIGHING MACHINES
Year: 1874

page_text: LETTERS PATENT to Henry Pooley, the younger, of Liverpool, in the
County of Lancaster, and John Greenwood, of Manchester, also in
the County of Lancaster, for the Invention of "IMPROVEMENTS IN
Sealed the 26th June 1874, and dated the 9th January 1874.
PROVISIONAL SPECIFICATION left by the said Henry Pooley and
John Greenwood at the Office of the Commissioners of Patents,
with their Petition, on the 9th January 1874.
We, HENRY POOLEY, the younger, of Liverpool, in the County of
Lancaster, and JOHN GREENWOOD, of Manchester, also in the County of
Lancaster, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN SELF-INDICATING WEIGHING MACHINES," to be as follows:-
:-
:
By the application of the improvements in self-indicating weighing*
machines to which this Invention relates, the vibration in the indicating
dials of such weighing machines is checked, and the indication of weight
is thereby more readily and accurately ascertained.

page_text: The improvements in self-indicating weighing machines according to
this Invention consist in fixing or attaching a circular tube of gutta
percha, or other suitable material to the revolving dial of the weighing
machine. This circular tube is partially filled with mercury or other
suitable fluid. Inside the tube there is fixed a chain or cross bars, or
other suitable contrivance for the purpose of breaking up the mercury or
other fluid that is contained in the said tube, thereby retarding
or checking its vibration.
The action of the apparatus is as follows:-The circular tube being
made to perform a portion of a revolution with the dial by means of the
working of the weighing machine, and the motive power being stopped
the mercury or other fluid instantly falls to the bottom of the tube, and
so checks the vibration of the dial. If the mercury should have any
tendency to vibrate in the tube, it is immediately counteracted by
coming in contact with the chain, cross bar, or other suitable check
placed in the tube as before stated, which acts as a kind of break.
This Invention is particulary applicable to pit bank weighing machines
and all self-indicating weighing machines, which indicate weight passing
continuously and consecutively over, on to, or through the machine, and
where the weights are checked or read off by the eye.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Pooley and John Greenwood in the Great
Seal Patent Office on the 6th July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HENRY
POOLEY, the younger, of Liverpool, in the County of Lancaster, and
JOHN GREENWOOD, of Manchester, also in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of January, 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 us, the said Henry Pooley, the younger, and John.
Greenwood, Her special licence that we, the said Henry Pooley, the
younger, and John Greenwood; our executors, administrators, and

page_text: assigns, or such others as we, the said Henry Pooley, the younger, and
John Greenwood, our 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 Inven-
tion for "IMPROVEMENTS IN SELF-INDICATING WEIGHING MACHINES," upon the
condition (amongst others) that we, the said Henry Pooley, the younger,
and John Greenwood, our executors or administrators, by an instrument
in writing under our, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Inven-
tion, 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 we, the said Henry Pooley, the younger, and
John Greenwood, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
By the application of the improvements in self-indicating weighing
machines to which this Invention relates, the vibration in the indicating
dials or other indicators of such weighing machines is checked, and the
indication of weight is thereby more readily and accurately ascertained.
The improvements in self-indicating weighing machines according to
this Invention consists in fixing or attaching a circular tube of gutta
percha, or other suitable material to the revolving dial or other indicator
of the weighing machine: This circular tube is partially filled with
mercury or other suitable fluid. Inside the tube there is fixed a chain
or cross bars, or other suitable contrivance for the purpose of breaking up
the mercury or other fluid that is contained in the said tube, thereby
retarding or checking its flow.
The action of the apparatus is as follows:-The circular tube being
made to perform a portion of a revolution with the dial or other indicator
by means of the working of the weighing machine, and the motive
power being stopped the mercury or other fluid instantly falls to the
bottom of the tube, and so checks the vibration of the dial or other
indicator: If the mercury should have any tendency to vibrate in the

page_text: tube, it is immediately counteracted by coming in contact with the
chain, cross bars, or other suitable check placed in the tube, as before,
stated, which acts as a kind of break.
This Invention is particularly applicable to pit bank weighing machines
and all self-indicating weighing machines, which indicate weight passing
continuously and consecutively over, on to, or through the machine,
and where the weights are checked or read off by the eye.
The beforegoing being the nature, object, and purposes of this Inven-
tion, we will now proceed to describe more in detail how the same may
be carried out into practical effect, and for that purpose we have
hereunto attached a Sheet of Drawings illustrative of our Invention and
of its adaptation to the dials of self-indicating weighing machines.
Figure 1 is an elevation shown partly in section of an apparatus
constructed according to our Invention, and to be applied to the dial or
other indicator of any self-indicating weighing machine.
Figure 2 is a front elevation shown partly in section of the adaptation.
of our Invention to the dial of a self-indicating weighing machine;
Figure 3 is an end view of same with the dial shown partly in section.
Figure 4 is an outside view of the dial of a self-indicating weighing
machine.
Upon reference to Figure 1 it will be seen that our Invention consists
of a circular tube of gutta percha or other suitable material A. Inside
the tube there is fixed a chain or cross bar B, which may also be of
gutta percha or other suitable material. The tube A is partially filled
with mercury and is fitted behind the dial plate C of a self-indicating
weighing machine, as shown at Figures 2 and 3.
The dial plate C of the self-indicating weighing machine, as shown at
Figures 1, 2, and 3, is actuated and caused to rotate by the rack and
pinion D and its attendant gear, and the adaptation of the apparatus, as
shown at Figure 1, and fixed behind the dial plate, as shown at Figures 2,
3, and 4 causes the dial plate to indicate by the pointer E instantaneously
upon the weight being passed over, on, or in the weighing machine,
inasmuch as the tube A being partially filled with mercury and the
motive power being stopped, the mercury or other fluid falls to the
bottom of the tube and so checks the vibration of the dial, and if
the mercury should have any tendency to oscillate in the tube it iş

page_text: immediately counteracted or checked by coming in contact with the
chain B inside the tube which acts as a break.
Having now fully described and ascertained the nature, object, and
purposes of this four Invention, and shown how the same may be put
into practical operation by illustrating its adaptation to the dial of a
self-indicating weighing machine, we would have it understood that we do
not confine ourselves to any particular dimensions, as the same may be
considerably varied, nor do we confine ourselves to the application of
our Invention to any particular style of self-indicating weighing
machines; but what we claim as our Invention and secured to us by
Letters Patent as aforesaid is, an apparatus consisting of a circular tube
of gutta percha or other suitable material partially filled with mercury
or other fluid, and having therein a chain, cross bars, or other suitable
contrivance for checking the flow of the mercury or other fluid, such
apparatus to be fitted to and used with the dials or other indicators of
self-indicating weighing machines for the purpose of checking the
vibration in the dials or other indicators of such machines, the whole
substantially in the manner and for the purpose as herein-before
described and set forth in the beforegoing Specification, and illustrated
in the accompanying Sheet of Drawings.
In witness whereof, we, the said Henry Pooley, the younger, and
John Greenwood, have hereunto set our hands and seals, this
Third day of July, in the year of our Lord One thousand eight
hundred and seventy-four.
HENRY (L.s.) POOLEY, JR.
JOHN
(L.S.) GREENWOOD.