Improvements in Weighing Apparatus.
Year: 1897

page_text: Date of Application, 8th Nov., 1897
Complete Specification Left, 20th July, 1898-Accepted, 3rd Sept., 1898
Improvements in Weighing Apparatus.
We, JOHAN AUGUST STACKIG, Engineer, and OTTO CARLSON, Manufacturer, both
of 42, Luntmakaregatan, Stockholm, in the Kingdom of Sweden, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in weighing apparatus and consists
chiefly in the arrangement of the pointers in scales of the kind wherein the
weight or load is suspended from a band placed round a rolling cylinder.
Hitherto the pointer in scales of this kind has been operated by means of a
special pulley, suitably actuated by the cylinder. With this arrangement, how-
ever, considerable loss of sensibility and accuracy occurs for various reasons; for
example from friction and play in the bearings, sliding of the band or string,
riding of cog-wheels etc., whereby the weight as registered by the pointer is not
accurate.
In order to avoid these drawbacks we rigidly connect the pointer and the rolling
cylinder. With this rigid construction, however, the pointer no longer moves
round one point, but round a point, that may move for example, in a vertical
line. The curve, along which the pointer moves to indicate the weight, is not
therefore in this case circular but varies from the circular, in proportion to the
size and shape of the rolling cylinder, the weight of the load and the position of
the point of suspension as well as to the shape and inclination of the rails, on
which the cylinder rolls.
By this construction and more especially by the rigid connection between the
rolling cylinder and the pointer, in combination with the specially curved
graduated line we avoid all the disadvantages possessed by this type of scales,
and which cause loss of sensibility and accuracy as above mentioned.
Teted the 8th dow of November 1807
We, JOHAN AUGUST STACKIG, Engineer, and OTTO CARLSON, Manufacturer, both
of 42, Luntmakaregatan, Stockholm, in the Kingdom of Sweden, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to improvements in weighing annaratus and conaisie

page_text: chiefly in the arrangement of the pointers in scales of the kind wherein the
weight or load is suspended from a band placed round a rolling cylinder.
Hitherto the pointer in scales of this kind has been operated by means of a
special pulley, suitably actuated by the cylinder. With this arrangement, how-
ever, considerable loss of sensibility and accuracy occurs for various reasons; for
example from friction and play in the bearings, sliding of the band or string,
riding of cog-wheels etc., whereby the weight as registered by the pointer is not
accurate.
In order to avoid these drawbacks we rigidly connect the pointer and the rolling
cylinder as indicated in the accompanying drawing which is a view of apparatus
made according to the invention. With this rigid construction, however, the
pointer 2 no longer moves round one point, but round a point that may move, for
example, in a vertical line. The curve 3 along which the pointer 2 moves to
indicate the weight, is not therefore in this case circular but varies from the
circular, in proportion to the size and shape of the rolling cylinder 1 and the
counterweight and the position of the point of suspension as well as to the shape
and inclination of the rails 5 on which the cylinder 1 rolls.
By this construction and more especially by the rigid connection between the
rolling cylinder and the pointer, in combination with the specially curved
graduated line we avoid all the disadvantages possessed by this type of scales,
and which cause loss of sensibility and accuracy as above mentioned.
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. In scales of the kind wherein the load is suspended from a band passed round
a rolling cylinder, the arrangement of a pointer fixed to the said cylinder and
indicating the weight of the load, when the cylinder moves, upon a specially
curved graduated scale, substantially as herein before described.
2. The manufacture and use of the improved weighing apparatus hereinbefore
described and illustrated in the accompanying drawing.
the day
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.