Improvements in the Construction of weighing machines. Machine Manufac
Year: 1886

page_text: Date of Application, 28th Oct., 1886
Complete Left, 28th July, 1887.
Complete Accepted, 2nd Sept., 1887
Improvements in the Construction of weighing machines.
We FREDERICK THOMAS WENBORN, of 99, York Road, Westminster Road, in the
County of Surrey, Weighing Machine Manufacturer, HENRY WILLIAM COPPEN and
JOHN FREDERIC COPPEN, both of 42, Marsham Street, Westminster, in the County
of Middlesex, Provision Dealers, do hereby declare the nature of this invention to be
as follows:-
:-
Our invention relates to an improved method of constructing weighing machines,
and consists in fitting guards over the end centres of the machine to prevent the
access of dust or wet thereto, and in making the supports that carry the scale pan
edge up instead of side up, for the purpose of preventing the gathering of liquid or
other matters upon the surface thereof.
Our improvements can be applied to any kind of weighing machine or counter
scales.
In carrying them into effect, we make covers of sufficient width and depth, and
throating or channels which are fixed to the lever of the machine over the centres and
planes of rest. These are preferably made of a metal which will not rust when
wet with water, and may be convertible with the cover.
The supports of the scale pans are, according to our invention set edge up inside
of side up, so that any water that may run on to them, shall run off instead of
remaining upon them to disturb the equity of the weigh. They are made removeable.
The pillar instead of being solid is formed in two concaved parts to admit the
arms or vertical connecting rods.
Dated this 28th day of October 1886.
PHILLIPS & LEIGH,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Weighing Machines.
We, FREDERICK THOMAS WENBORN, of 99, York Road, Westminster Road, in the
County of Surrey, Weighing Machine Manufacturer, HENRY WILLIAM COPPEN, &
JOHN FREDERICK COPPEN, both of 42, Marsham Street, Westminster, in the County
of Middlesex, Provision Dealers, 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 :-
Our invention relates to an improved method of constructing weighing machines ;
and consists in fitting guards over the end centres of the machine for the purpose of
preventing the access of dust or wet thereto, and in making the supports that carry
the scale-pan edge up, instead of side up, for the purpose of preventing the gathering
of liquid, especially water, or other matters upon the surface thereof.
In order that our invention, and the means by which it is to be carried into
practical effect, may be thoroughly understood, we will now describe the same in detail
referring in so doing to the accompanying drawings, which are to be taken as part
of this specification and read therewith, and in which
Fig. 1 is a sectional front elevation illustrating the application of our invention
to a counter weighing machine.
Fig. 2 is an end elevation corresponding therewith.
Fig. 3 is an isometric view of a scale-pan support: and
Fig. 4 is a plan of the lever of the machine drawn on a larger scale.
A is the base of the machine, and B the pillar.
C is the lever; and c, c, the main centres.
D are caps of the usual shape, but they are fixed to the lever of the machine,
instead of to the base as it has been hitherto the general practice to fix them.
E, E are covers for the end knife-edges, e, e, to protect them from wet and dust.
Each cover is of the shape of an inverted trough, and is long enough to cover one
end of the lever as shewn in Fig. 2. The stops e² are consequently always protected
by it. It is preferably flat along its top and has the bearings e¹ e¹ incorporated
with it.
According to our invention, we interpose throatings or channels between the end
knife-edges of the lever and the lever itself, so that any water which may drop upon
the lever will be prevented by the throatings f and the ridges f¹ from finding its way
to the knife-edges and will drop down from the said throatings upon the counter.
G is the scale-pan support. It has hitherto been the practice to make this part of
a weighing machine with the flat side of the bar to the top. The practical disadvantage
of this method of making it has been that the said flat sides have readily caught and
retained liquid and dust, an accumulation of matter which has not only interfered
with the accuracy of the weigh, but has contributed to the rapid corrosion of said
support.

page_text: Now, according to our invention, we make the support with the narrow edge g¹,
instead of the wider side g², upwards so that there is a too restricted surface for the
accumulation of a practically serious quantity of wet or dust. Any liquid which may
find its way on to the edges g' will also tend to drip off therefrom instead of remaining
thereupon, as it would if the side g³ were to the top.
We prefer to make the supports which may have any number of arms removable
from the machine. For this purpose, we form a catch or catches g³ which engage
with the respective vertical connecting rod. The supports when removable rest upon
extensions g of the connecting rod.
Both the vertical connecting rods, H, H, are enclosed within the hollow-pillar B,
which is enlarged at the top to enclose the steadying gears I, I¹.
In Figs. 1 and 2 we shew the inlargement, J, of the central pillar as overhanging
equally on either side of the vertical centre of the pillar. This is a convenient
construction for many purposes, but our invention does not confine us to it, inasmuch
as one half of the extension, e.g., the one overhanging the scale pan or dish on which
the goods to be weighed are placed, can be dispensed with, both steadying gears being
adapted to work as such within one half extension.
We wish to point out that our invention is applicable to any or all kinds of
weighing machines, and is not confined to counter weighing machines as illustrated;
neither is it confined to the relative positions of lever and steadying gear illustrated,
inasmuch as the lever and its guards may be fixed at the top of the frame of the
machine and the steadying gear underneath.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :-
1. The guard extending over the knife edges and centres at one end of the lever of
a weighing machine, for the purpose of preventing the incidence of dust or liquid
upon said knife edges and centres and access of the same thereto; substantially as
and for the purpose described with reference to the accompanying figures.
2. The combination with the ends of the lever of a weighing machine of throatings
or channels interposed between said ends and the knife edges projecting therefrom,
for the purpose of receiving moisture which has fallen upon said lever and preventing
it from reaching the said knife edges and the centres in which they work substantially
as described with reference to the accompanying figures.
3. A scale pan support or cross or triangle the several arms of which are set edge
upwards; substantially as described with reference to the accompanying figure 3.
4. The combination of arms forming a triangle or cross, being a support for a
scale-pan, and adapted by means of hooks or an equivalent device formed on the end
of one arm to removably engage with the moving part of the machine; substantially
as described with reference to the accompanying figures.
5. In a weighing machine enclosing the vertical connecting rods H H in a hollow
pillar substantially as described with reference to the accompanying figures 1 and 2.
1007
1002
2007
PHILLIPS & LEIGH,
Patent Agents,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicants.