Improvements in Scale or Pan Weighing Machines.
Year: 1892

page_text: Date of Application, 23rd Nov.. 1892
Complete Specification Left, 23rd Aug., 1893-Accepted, 23rd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Scale or Pan Weighing Machines.
We, ALEXANDER WOOD, of 10 Stockwell Street, Glasgow, and THOMAS
DAVIES of 297 Main Street, Bridgeton, Glasgow, Weighing Machine Makers, do
hereby declare the nature of this invention to be as follows:-
Whereas by the passing of the Weights and Measures Act 1889 a difficulty has
been experienced by certain shop keepers and manufacturers in not being able to
procure counter and other weighing machines with scales or pans of sufficient size
to meet their requirements without having, on the one hand to purchase a machine
out of all proportion to the dead weight of the goods to be weighed, or, on the other
hand, to run the risk of having the machine condemned by the inspector of weights
and measures, owing to the scale being proportionately too large and as a
consequence when the weight is placed more to one side of the scale than the other
the bearings are lifted off the knife edges of the machine and accurate weighing is
rendered impossible.
Great loss has been sustained by users of such machines, as all machines in use
previous to the passing of the Act have had to be thrown aside or fitted with scales
or pans much too small for the purposes for which they were intended.
Our invention has for its object to obviate this difficulty and provide the public
with an accurate and reliable machine which will meet all the requirements of
the Board of Trade and at the same time be fitted with an extra large scale
or pan.
In carrying out our invention, under one arrangement, we make the weighing
machine with a scale which is preferably independent of the spread and the spread
is provided with two or more pivots or equivalent which rest in bearings or eyes on
the carrying arms of the beam.
The spread is made to suit the shape of the scale or pan.
Under a slightly different arrangement the pan or scale itself or the spreader may
have two sets of pivots arranged at each side which are supported in recesses on
bearing or supporting bars.
The pan or scale is, by these methods, so poised or supported on its bearings that
in cases where the goods being weighed are not placed fairly in the pan or scale it
will instead of, as at present, shifting off its bearings, tilt over and eject the goods.
Attempts to defraud the public are in this manner rendered impossible.
Dated this 22nd day of November 1892.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
Improvements in Scale or Pan Weighing Machines.
We, ALEXANDER WOOD of 10 Stockwell Street, Glasgow, and THOMAS
DAVIES of 297 Main Street, Bridgeton, Glasgow, Weighing Machine Makers 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:
Whereas by the passing of the Weights and Measures Act 1889 a difficulty has
been experience by certain shop keepers and manufacturers in not being able to
procure counter and other weighing machines with scales or pans of sufficient sizc
to meet their requirements without having on the one hand to purchase a machine

page_text: out of all proportion to the dead weight of the goods to be weighed, or, on the
other hand, to run the risk of having the machine condemned by the inspector of
weights and measures, owing to the scale being proportionately too large, and, as
a consequence, when the weight is placed more to one side of the scale than the
other the bearings are lifted off the knife edges of the machine and accurate
weighing is rendered impossible.
Great loss has been sustained by users of such machines, as all machines in use
previous to the passing of the Act have had to be thrown aside or fitted with scales
or pans much too small for the purposes for which they were intended.
Our invention has for its object to obviate this difficulty and provide the public
with an accurate and reliable machine which will meet all the requirements of
the Board of Trade, and at the same time, be fitted with an extra large scale
or pan.
In carrying out our invention, under one arrangement, we make the weighing
machine with a scale which is, preferably, independent of the spread and the spread
is provided with two or more pivots or equivalent which rest in bearings or eyes
on the carrying arms of the beam, or, if so desired, this arrangement may be
reversed i.e. the pivots may be made on the carrying arms and the bearings on the
spread.
The spread is made to suit the shape of the scale or pan.
Under a slightly different arrangement the pan or scale itself or the spread may
have two sets of pivots arranged at each side which are supported in recesses on
bearing or supporting bars.
The pan or scale is, by these methods, so poised or supported in its bearings that
in cases where the goods being weighed are not placed fairly in the pan or scale it
will instead of, as at present, shifting off its bearings, tilt over and eject the goods.
Attempts to defraud the public are in this manner rendered impossible.
And in order that our said invention may be properly understood we have here-
unto appended an explanatory sheet of drawings which show, by way of illustration,
methods of carrying our invention into effect or practice.
On the drawings:-
Fig. 1 is a side elevation of one form of the improved weighing scale.
Fig. 2 is an end view of the scale Fig. 1.
Fig. 3 is a side view of the spread of the scale.
Fig. 4 is a plan of the spread.
Fig. 5 shows, in part, another construction of the scale.
Fig. 6 is an end view of the scale Fig. 5.
Referring to the drawings whereon the same reference letters wherever repeated
indicate similar parts.
a is the foundation or base of the weighing scale. 6 is the beam.
c, c¹ are the
carrying arms. d, d¹, d², d³, (d³ is not shown on drawing) are 4 pins or projections
arranged two at each side of the arm c. e is the pan or scale, and f the spread.
The spread is made with two cross pieces y, g¹ to which are secured two pieces of
metal h, having their ends bent downwards as shown at Fig. 1. Cuts or
indentations i, are made on the ends of these pieces. The cuts i, of the pieces
rest on the bearing pins d, d', d², (d). j, j are small chains which connect the
spread, at each end, to the arms c, c¹.
With this construction of weighing scale the spread of the pan is so poised or
supported on the bearing pins d, d', d², d, that in cases where goods being weighed
are not placed fairly in the pan, it tilts over, as shown at Fig. 2, and ejects the
goods. The chains j, j prevent the spread tumbling off the machine.
In Figs. 5 and 6 the bearing pins d, d, d², (d³), are shown as fitted on the bent
metal supports h, h', which are, in this case, without recesses. The pins rest in
recesses or bearings i, i, made in strips of metal k, k¹ secured on or to the carrying
arm c.
Instead of making the bearings i, i, in the form of cuts or recesses, they may be
made in the form of points, eyes, holes, or sockets.

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If so desired the spread may be dispensed with and the strips h, h¹, be secured to
the bottom of the pan itself.
It is to be understood that we do not confine ourselves to the precise constructions
shown on the drawings as it is manifest these constructions can be further modified
and altered without departing from the principle of the invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. A weighing scale having the spread or the pan so poised or supported that
should the goods being weighed not be placed fairly in the pan it will tilt over and
eject them, substantially as herein before set forth.
2. A weighing scale constructed substantially as herein before described and shown
under modifications on the drawings annexed.
Durunt 1002
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.