Improvements in Centres for Weighing Machines.
Year: 1889

page_text: Date of Application, 24th Sept., 1889
Complete Specification Left, 23rd July, 1890-Accepted, 6th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Centres for Weighing Machines.
I, WILLIAM BEILBY AVERY of the Firm of Messrs. W. & T. Avery Weighing
Machine Manufacturers Birmingham in the County of Warwick, do hereby declare the
nature of this invention to be as follows :-
The object of my invention is to construct adjustable weighing machine centres by
means of piercing, pressing and stamping sheet metals, to form the desired shape and
configuration which I adopt for the particular requirements of weighing machine lever
or beam balance of any kind.
In carrying my invention into effect I construct an adjustable centre for attaching
to the beam of a weighing machine by cutting out a blank or portion of the specially
prepared, or ordinary sheet of rolled steel or other metal, or material, that I employ
for the purpose, by means of a press punch or shears or any ordinary mechanical
device for piercing sheet materials. This blank of peculiar shape I then close over or
bend into a V-shaped cap or clip having projecting lips or sings arranged suitably
for attaching to the lover, beam arm or other portion of a weighing machine, the
snugs also being of such shape and form, that holes can be drilled or punched through
them and also if required at the same time through the arm or lever of the weighing
machine; sometimes cause a projection or projections from the centre or clip to
enter the beam or lever and thus the attachment of the centre to the lever arm or
beam made in or at any required position after the balance or adjustment of the lever,
arın or beam has been accurately determined upon the movable centre which has been
clipped onto it; this adjustment being performed in the manner described in the
Specification of a Patent granted to me dated February 1st 1888 No. 1519.
After I have bent up the metal blank to the desired form of clip having a V edge,
I harden it; and polish or grind up the bearing surface or knife edge so that this edge
may be truly maintained in actual use.
I do not limit the application of my improved method of construction to any particular
shape or form of centre but apply it with similar advantage to weighing inachines,
steelyards and levers or arms for balances of every description.
Datad this 521 of Cantau 1000
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Centres for Weighing Machines.
I, WILLIAM BEILBY AVERY of the Firm of Messrs. W. & T. Avery Weighing
Machine Manufacturers, Birmingham, in the County of Warwick, 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:—
The object of my invention is to construct adjustable weighing machine centres by
means of piercing, pressing, and stamping sheet metals, to form the desired shape and
configuration which I adopt for the particular requirements of weighing machine,
lever, or beam, balance of any kind.
In carrying my invention into effect I construct an adjustable centre for attaching
to the beam of a weighing machine by cutting out a blank or portion of the specially
prepared or ordinary sheet of rolled steel or other metal, or material, that I employ for
the purpose, by means of a press, punch, or shears, or any ordinary mechanical device
for piercing sheet materials. This blank of peculiar shape I then close over or bend into
Price 6d l

page_text: a V shaped cap or clip having projecting lips or snugs arranged suitably for attaching
to the lever, beam, arm, or other portion of a weighing machine; the snugs also being
of such shape and form, that holes can be drilled or punched through them, and also if
required at the same time through the arm or lever of the weighing machine; I
sometimes cause a projection or projections from the centre or clip to enter the beam
or lever, and thus the attachment of the centre to the lever arm or bean, made in, or at
any required position after the balance or adjustment of the lever, arm or beam has
been accurately determined upon the movable centre, which has been clipped on it;
this adjustment being performed in the manner described in the Specification of a
Patent granted to me dated February 1st 1888 No. 1519.
After I have bent up the metal blank to the desired form of clip having a V edge,
I harden it; and polish or grind up the bearing surface or knife edge so that this
edge may be truly maintained in actual use.
I do not limit the application of my improved method of construction to any
particular shape or form of centre, but apply it with similar advantage to weighing
machines, steelyards, and levers or arms for balances of every description.
In order that my invention and the manner of performing the same may be properly
understood and readily carried into effect I append hereunto a sheet of explanatory
drawings to be hereinafter referred to.
Figure 1 is a blank or piece of metal pierced out of a sheet or strip. Figure 2 is a
plan shewing next operation for clearing out the corners A, for the purpose of
bringing into proper form the ends B, B. Figure 3 is an elevation of the third
process, and Figure 4 is a plan of the same, in which the ends B, B, are bent up
together with the sides C, C, the said sides being bent about the dotted lines c (Fig. 2).
Figure 5 is a front elevation, Figure 6 an end elevation, and Figure 7 a plan of the
finished centre when finally pressed up into the correct shape for attaching to the beam
or lever of the weighing machine. The pointed surface E being ground or formed
into a knife edge support; while the closed-in ends B. admit of holes being made
through them, for rigidly securing them in any desired position of the beam or lever.
Sometimes instead of drilling holes in the bent up ends B, for attachment to the
beam or lever, I place a projecting boss or eyelet upon each of the bent up ends,
which I secure or let into suitable holes or recesses, formed upon the lever arm or
beam.
I construct the centre in the manner bereinbefore described to suit any particular
shape of beam or lever, by varying the tools or cutting and punching instruments to
suit the peculiar form required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be perforined I declare that what I
claim is :-
1. The construction of centres for weighing machines formed out of sheet or strip
metal, substantially as and for the purposes herein before described, and as illustrated
in the accompanying drawings.
II. The construction of adjustable centres for weighing machines out of sheet metal,
or strip, substantially as hereinbefore described and as illustrated in the accompanying
drawings.
Dated this 2200 day o
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.