Improvements in Self Indicating Weighing Apparatus.
Year: 1899

page_text: Date of Application, 26th Oct., 1899
Complete Specification Left, 25th July, 1900-Accepted, 13th Oct., 1900
PROVISIONAL SPECIFICATION.
Improvements in Self Indicating Weighing Apparatus.
I, JOSEPH WILBRAHAM CARTWRIGHT, of 53, Lytham Road, Marshside, South-
port, Lancashire, Weighing Machine Fitter, do hereby declare the nature of this
invention to be as follows:-
My invention consists in the application to scale beams and the like the principle
of self indicating. To attain this I propose to construct a scale beam with three
arms. Two of the arms to be of equal length and horizontal with knife edges as
is usual. The third arm to be at right angles to and fixed on the under side of
the horizontal arms and will be so weighted that it will move a predetermined
distance on a given weight being placed in the scale pan. The vertical arm is
connected to and moves a pointer which shows on an index the amount of such
weight. The manner of connecting the pointer with the vertical arm I propose
to do as follows. The pointer will be carried by a knife edge centre which will
pass through and at right angles to the lower part of pointer and the knife edge
will be supported on suitable bearings. Connection will be made between vertical
arm and pointer by means of a cord or chain attached to vertical arm and passing
over and attached to a drum or pulley fixed to the pointer the axis of the drum
or pulley to be the edge of the knife edge centre which carries the pointer. My
object in this invention is to enable the user to dispense with the smaller de-
nominations of standard weights say below one pound. All differences of weight
below one pound to be shown on index of scale.
Dated this 23rd day of October 1899.
JOSEPH WILBRAHAM CARTWRIGHT.
COMPLETE SPECIFICATION.
Improvements in Self Indicating Weighing Apparatus.
I, JOSEPH WILBRAHAM CARTWRIGHT, of 53, Lytham Road, Marshside, South-
port, in the County of Lancaster, Mechanic, 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:-
This invention relates to improvements in beam scales. The object of my
invention is to dispense with all fractional weights by the combination with the
scale beam of a pointer that will indicate on a dial the fractional parts of one
pound or other whole quantity.
In the accompanying drawing Fig. 1 is a side elevation, Fig. 2 is a vertical
section, and Fig. 3 is a front elevation of a self indicating weighing apparatus

page_text: constructed according to this invention. In these views similar letters refer to
similar parts.
For the purpose of this invention I form a scale beam with two horizontal
arms a and a¹ and one arm b at right angles thereto : The two arms a and a¹
which are formed in one piece are each of the same length from the centre of the
machine to the knife edges p and 2 from which the nearest whole weight of the
goods, and the goods to be weighed are respectively suspended in any ordinary
manner. Said arms are supported in the usual way on knife edges resting on
bearings at c and d in the frame e. The arm bis centrally secured to the arms a
and a at right angles to the centre line B-B drawn through said arms; a framed
weight which is connected to the lower end of the arm is suspended in a tank
or dash pot g containing water or other fluid for the purpose of preventing violent
oscillation of the pointer. I connect a pointer j to the aforesaid arm b by means
of a cord or chain h one end of which is attached at h¹ to the bracket bi that is
bolted to or forms a part of the arm 6 said cord or chain passing over and being
secured by an adjustable screw 62 to the drum or pulley k that is fixed to the
pointer both said pulley and pointer being supported on knife edges / resting
in bearings q; a quadrant table of weights and fractions of weights as m is fixed
to the top of the frame. When the goods to be weighed are suspended from the
knife edge p¹, supposing their weight to be something over say 20lbs. a 20lb.
weight is suspended from the knife edge p, and the fractional parts of a pound are
indicated by the upper end of the pointer j moving along the dial plate m.
Fine
adjustment can be made by raising or lowering the weight f by means of the
screw v, or if more convenient said weight may be lightened or loaded.
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;
1. In beam scales the combination with the ordinary scale beam of a pointer
that will indicate on a dial the fractional parts of one pound or other whole
quantity substantially as and for the purpose herein before described.
2. The improved self indicating weighing apparatus, substantially as herein-
before described.
Dated this 24th day of July 1900.
GEO. DAVIES & SON,
Agents for the Applicant,
4, St. Ann's Square, Manchester.