Improvements in Steelyards for Weighing Apparatus.
Year: 1899

page_text: Date of Application, 28th Oct., 1899
Complete Specification Left, 27th July, 1900-Accepted, 1st Sept., 1900
Improvements in Steelyards for Weighing Apparatus.
I, WILLIAM EDWARD HIPKINS, Managing Director of W. & T. Avery, Limited,
Soho Foundry, Birmingham, do hereby declare the nature of this invention to
be as follows;-
My improvement consists in the duplication of the notches or positioning
grooves which are necessary for fixing with exactitude the travelling or moving
poise upon the steelyard, and which is essential for correctly ascertaining a
given weight when placed upon the platform. In the usual arrangement, where
one set of notches or positioning grooves only are used, it is found in practice
that the positioning notches become worn owing to the action of positioning
pawl or nib upon the poise and so affect the accuracy of the weighing. To obvi-
ate this fault is the purpose of my invention. This object is attained by affix-
ing to the steelyard in any convenient position, a supplementary bar, with the
notches or grooves exactly the same relative distance apart as the grooves or
notches upon the steelyard, and running parallel to each other, but not neces-
sarily in the same vertical plane, the notches on this supplementary bar are
preferably square in shape, and the bar can be fixed either with the notches
facing upward, or in an inverted position with the notches on the underside.
When the bar is fixed with the notches underneath, it can be arranged con-
veniently either underneath the steelyard, or at the back, and has the advantage of
preventing the lodgment of dust or dirt within the notches. The pawl or posi-
tioning nib which engages in the notches upon the supplementary bar, is so
fixed that it must strike the supplementary bar, before the other pawl or posi-
tioning nib (which is usually V shaped to engage with the notches upon the
steelyard) can come in contact with the top edge of the steelyard, except when
the poise is exactly in the proper position for being lowered into one of the
V shaped notches upon the steelyard by means of the positioning pawl or nib.
In the case of the notches upon the supplementary bar being inverted with
the notches downwards, the positioning pawl or nib would be at the opposite
end of the travelling poise, to the positioning pawl or nib which engages in
the notches upon the steelyard, but when the supplementary bar is fixed with
the notches facing upward, both positioning pawls or nibs, would be placed at
the same end of the poise.
This improvement is applicable to all kinds of steelyards which are made to
dispense either entirely or partially with loose weights, and can be adapted
with equal facility to any kind of weighbridge or platform machine, and can be
used if necessary with the load suspended direct from the steelyard without the
intervention of levers and platform.
i 11
of Ontaho 1800

page_text: Improvements in Steelyards for Weighing Apparatus.
I, WILLIAM EDWARD HIPKINS, Managing Director of the Firm of W. & T.
Avery, Limited, Manufacturers of Weighing Apparatus, Soho Foundry, Bir-
mingham, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
My improvement consists in the duplication of the notches or positioning
grooves which are necessary for fixing with exactitude the travelling or moving
poise upon the steelyard, and which is essential for ascertaining a given weight
when placed upon the platform. In the usual arrangement when only one set
of notches or positioning grooves are used, it is found in practice that the top
edge of the steelyard becomes in time considerably damaged owing to the posi-
tioning pawl or nib, striking the steelyard in other places than in the notch
or groove intended, and to obviate this fault, is the purpose of my invention.
This object is attained, by affixing to the steelyard in any convenient posi-
tion, a supplementary bar, with the notches or grooves, exactly the same rela-
tive distance apart as the grooves or notches upon the steelyard, and running
parallel to each other, but not necessarily in the same vertical plane. The
notches on this supplementary bar are preferably square, but can be made
either vee, semicircular, or any other convenient shape, and the bar can be made
with the notches facing upward, or with the notches in an inverted position
underneath the bar.
When the bar is fixed with the notches underneath, it can be arranged con-
veniently either underneath the steelyard or at the back, and has the advantage
of preventing the accumulation of dust or dirt within the notches.
The positioning pawl or nib which engages the notches upon the supplemen-
tary bar, is so fixed, that it must necessarily strike the supplementary bar, before
the main pawl or positioning nib, (which is usually vee shaped to engage the
notches upon the steelyard) can come in contact with the top edge of the steel-
yard, except when the poise is exactly in the proper position for being lowered
into the fee shaped notches upon the steelyard.
The accompanying sheets of drawings will explain more clearly, two arrange-
ments for carrying out my invention.
Fig. 1, is a back elevation of a portion of the steelyard and the main poise,
Fig. 2, is a sectional end elevation of Fig. 1, on the line A--B, and Fig. 3, is
a plan of Fig. 1, these three figures show the arrangement with the supple-
mentary bar inverted, and with the notches underneath.
Fig 4, shows a back elevation of a portion of the steelyard, together with
the main poise and the supplementary bar, with the notches on the top edge of
the bar, Fig. 5, is a sectional end elevation of Fig. 4, on the line C-D and
Fig. 6, is a plan of Fig. 4.
Referring to Figs. 1, 2, & 3, showing the arrangement with the notches of
the supplementary bar inverted, it will be seen that the nib a, upon the main
poise, engages with the notches c, upon the upper edge of the steelyard d,
and the supplementary nib e, at the reverse end of the main poise b, engages
in the notches f, upon the underside of the supplementary bar, the notches f,
being deeper than the notches c, it is evident that it is impossible for the nib a,
to come in contact with the top edge of the steelyard d, until the supplemen-
tary nib e, enters one of the notches f, upon the supplementary bar g, the nib a,
upon the main poise will then engage the corresponding notch c, upon the upper

page_text: edge of the steelyard d, the roller h, is placed nearer to the positioning nib,
than the centre of gravity of the poise b, so that both the positioning nibs will
be secure when the poise is at rest.
Referring to Figs. 4, 5 & 6, in which similar letters refer to similar parts,
it will be seen that this arrangement is a modification of the same principle,
with the difference that the notches are on the upper side of the supplementary
bar, and that the supplementary positioning nib e, is at the same end of the main
poise b, as the main positioning nib a, the same object being attained in both
cases.
This improvement is applicable to all kinds of steelyards which are made to
dispense either entirely or partially with loose weights, and can be adapted with
equal facility to any kind of platform machines or weighbridges, and can be
used if necessary when the load is carried direct from the steelyard without
the intervention of the usual transmitting levers to the platform.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is-
In steelyards for weighing apparatus, the combination with the ordinary
positioning nib of the main poise, a supplementary positioning nib engaging
with a supplementary positioning bar, substantially as described and set forth.
Dated this 26th day of July 1900
WILLIAM EDWARD HIPKINS.