Improvements relating to the Construction of Scales for Weighing.
Year: 1899

page_text: Date of Application, 17th May, 1899
Complete Specification Left. 16th Feb. 1900-Accepted. 24th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements relating to the Construction of Scales for Weighing.
I, EMILE BOCKSTAEL, Junior, of Digue du Canal, Brussels, in the Kingdom of
Belgium, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
This invention is for the purpose of avoiding the inconveniences which occur
in the construction of scales in which a bar shaped and forged is employed as
a support for the carrying knife of the scales.
This bar fixed usually on a cross piece on the under part of the table of the
scales should so to speak represent the base of a true isosceles triangle which is
easily constructed in the manufacture by the aid of three pieces of wood serving
to support the table of the scales but the adjustment of this base is often falsified
by the bar itself by reason of the treatment which it has to undergo in order
that it may be given a form suitable to its being adapted to the hind cross
piece of the scale beam and after being mounted it is not absolutely exact or does
not exactly coincide with the theoretical supporting line in which it should
lie. Hence there results a source of difficulties and hinderances in the manu-
facture of such scales the supporting bars having to be regulated by hand, trial
and repeated manipulations.
In order to remedy these inconveniences my invention consists essentially
in making use of a straight drawn bar not submitted to any forging or shaping
and remaining for this reason absolutely exact; and in combining with the
employment of this bar, a method of mounting this part of the scale assuring
the greatest rapidity for adjusting the bar exactly in place and the maintenance
of the knives or their pallets in position. For this purpose I construct as usual
by means of three pieces of wood supporting the table of the scales the isosceles
triangle on the base of which the metallic bar should be applied. This operation,
which is easily mechanically realised as it is not disturbed by further work and
only consists in the assemblage of three straight pieces, permits of obtaining
two marks on the sides of the triangle, these marks serving for boring two
holes which obtained mathematically and easily in the line of the base of the
triangle determine the position of the bar which has only to be placed on the
lower wooden piece in the position determined by these holes in which it
engages in order to be exteriorly fixed by means of washers and nuts. The bar
thus put in place and preferably partly sunk into the cross piece on which it
rests carries the supporting pallets for the knives but as these rest upon a square
face of the bar and might turn, I combine with the frame two retaining pieces
of special form in which these pallets are sunk which insures their definite
position. These pieces each form a square of which one face is situated in a
plane perpendicular to that of the bar, in each of these faces which are parallely
opposite one another is a depression in which the extremities of the pallets rest.
These are thus firmly held at the two extremities and cannot in any case deviate
from their accurate position. It can easily be understood that by reason of this
method, the mounting of the scale is considerably facilitated and its exactness
DQ71

page_text: augmented to a great degree, the position of the bar is easy to determine on the
triangle and the construction simplified.
Dated this 17th day of May 1899
Improvements relating to the Construction of Scales for Weighing.
I, EMILE BOCKSTAEL, Junior, of Digue du Canal, Brussels, in the Kingdom of
Belgium, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
This invention is for the purpose of avoiding the inconveniences which occur
in the construction of scales in which a bar shaped and forged is employed as
a support for the carrying knife of the scales.
This bar fixed usually on a cross piece on the under part of the table of the
scales should so to speak represent the base of a true isosceles triangle which is
easily constructed in the manufacture by the aid of three pieces of wood serving
to support the table of the scales but the adjustment of this base is often falsified
by the bar itself by reason of the treatment which it has to undergo in order
that it may be given a form suitable to its being adapted to the hind cross
piece of the scale beam and after being mounted it is not absolutely exact or does
not exactly coincide with the theoretical supporting line in which it should
lie. Hence there results a source of difficulties and hinderances in the manu-
facture of such scales, supporting bars having to be regulated by hand trial
and repeated manipulations.
In order to remedy these inconveniences my invention consists essentially
in making use of a straight drawn bar not submitted to any forging or shaping
and remaining for this reason absolutely exact; and of combining with the
employment of this bar, a method of mounting this part of the scale assuring
the greatest rapidity for adjusting the bar exactly in place and the maintenance
of the knives or their pallets in position. For this purpose I construct as usual
by means of three pieces of wood supporting the table of the scales the isosceles
triangle on the base of which the metallic bar should be applied. This operation
which is easily mechanically realized as it is not disturbed by further work and
only consists in the assemblage of three straight pieces permits of obtaining
two marks on the side of the triangle, these marks serving for boring two
holes which are obtained mathematically and easily in the base of the
triangle and determine the position of the bar which has only to be placed on the
lower wooden piece in the position determined by these holes in which it
engages in order to be exteriorly fixed by means of washers and nuts. The bar
thus put in place and preferably partly sunk into the cross piece on which it
rests carries the supporting pallets for the knives but as these rest upon a square
face of the bar and might turn or slip I combine with the bar two retaining pieces
of special form in which these pallets are sunk, which insures their definite
position.
In the annexed drawing which shows an example a realization of my invention,
Fig. 1 represents a section of the table of the scales, showing one of the lower
beams, the pallet of one of the knives and the bar carrying the said pallet. Fig. 2
is a plan view of the table as seen from below with the beams removed. Fig. 3
is a section following the axis of the bar carrying the pallets of the knives.

page_text: As will be seen from the drawing the table a, supported by the cross pieces b cd,
rests upon the beams e through the intermediary, of the pieces f serving as pallets
for the knives of the beams e; these pieces f are carried by a bar g. According to
my invention this bar is absolutely straight and has not been submitted to any
shaping; it passes directly into the cross pieces c and d forming the sides of the
triangle of the base of the scales and is fixed exteriorly by means of washers and
nuts; it is further partially sunk into the cross piece b. as shown in Fig. 1; this
bar carries, as mentioned above, the pieces f serving as pallets for the knives.
These pieces being fixed by a simple screw 1, might turn on the bar if they were
not supported at their other end in order to support them thus I fix to the cross
pieces ed by means of a screw n two special pieces m each of these pieces forms.
a square of which the upright part represents a surface o in a plane perpendicular
to that of the bar g: in each of these faces o which are parallel and opposite one
another is a depression in which the extremity of the respective pallet f rests;
the latter are in consequence supported at both ends and cannot in any case
deviate from their accurate position. It can easily be understood that by reason
of this method the mounting of the scale is considerably facilitated and its
exactness augmented to a great degree: the position of the bar g is, in fact, very
easy to determine by means of the triangle cbd and its manufacture is con-
siderably simplified, it being simply straight instead of necessitating, as it did
hitherto, the complicated form represented by the straight part between the two
sides completed by the bent parts o m.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
:-
1. Scales in which the bar underneath the table of the scales carrying the
pallets of the knives consists of a straight bar stretching across the wooden
supports, on the exterior of which it is fixed by means of washers and nuts
and in which the second point of support of the pallets for the knives, which has
hitherto consisted in a notch in the bar is formed by a catch piece or suitable
attachment, in order to avoid difficulties in mounting and the inaccuracies
generally resulting from the present complicated form of construction of this
part.
2. In scales as in Claim 1, in order to secure the position of the knife pallets
on the straight bar which carries them the provision upon the wooden supports
across which the bar stretches of square pieces presenting a perpendicular face
to the bar and provided with a depression in which the other extremity of the
pallets engages.
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, W.C., London.