Improvements in the Construction of Beams, and Fittings for the same, for use on Weighing Machines.
Year: 1890

page_text: Date of Application, 21st Aug., 1890
Complete Specification Left, 21st May, 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Beams, and Fittings for the
same, for use on Weighing Machines.
I, WILLIAM BEILBY AVERY of the firm of W. & T. Avery 12 Digbeth
Birmingham in the County of Warwick, Manufacturers, do hereby declare the
nature of this invention to be as follows:-
My invention has for its object the more expeditious construction and arrangement
of the fittings and parts forming the beams and levers of weighing machines,
whereby it is possible to produce such parts in large quantities, and thus to cheapen
the system of manufacturing and mounting the beams and levers employed upon
scales and other weighing machines.
In carrying my invention into effect when constructing a metal beam, I cast or
form my improved beam as a flat parallel piece of metal, in some cases having
boles formed within the same for lightening it, in any usual or ordinary manner.
That is to say I sometimes cast the beam as a thin plate of metal, or I cut it out
of a sheet of metal by means of punches or dies or by any well known mechanical
system for producing articles from the strip or sheet of metal. The ends of the
beam I maintain as unbroken or solid connections for receiving the knife edge
supports and the knife edges, by the peculiar and novel form in which I fashion
the extreme parts of the beam for enabling my improved knife edges to be
employed, when constructed in accordance with the system set forth and described
in Letters Patent granted to me upon the 1st day of February 1888 No. 1519.
I prefer in some cases to form the ends so that the beam terminates in a circle or
portion of a circle, and I drill or form a hole through this circular end through
which I thread my knife edge; this knife edge I pin or secure to the beam in the
manner set forth in the Specification of Letters Patent above referred to.
I construct the bearing or support for the hanging arms or links, which I thread
through the hole left within the beam ends, of such a form that each end of the
end bearing or shackle receives or enters into the flat metal plate which 1 employ
as my hanging link or shackle. This hanging link or shackle I construct out of
metal sheet plate, or I cast it as a parallel plate of a shape to suit any particular
or peculiar requirement; the ends which stand immediately above the knife edge
I prefer to make circular to be of uniform character with the head and collar of
a pin which I pass through each end to form a supporting surface to rest against
or upon the upper portion of the vibrating knife edge carried by the link plate.
I provide steel side bearings or contact pieces to receive the knife edge when in
position upon my open link bearing or shackle, by attaching steel tongues or small
strips within the open end of the link or lever against which the steel bearing ends
may rest.
In another system I provide for the side wear by constructing the steel
side pieces as projecting strips with two ears or end clips formed on each for the
purpose of embracing the side of my link bearing or shackle, and I pass pins.
through the clips and the metal of the shackle thus serving the double purpose of
securing the steel clip to the shackle and at the same time forming the support for
the knife edge bearing.
The central or main knife edge of the beam I attach in the manner set forth
in the Specification of my Patent No. 1519 of 1888 before referred to; while the
corresponding bearing I carry within the central suspension frame or plate, which
plate I construct out of flat metal or strip similarly to the manner hereinbefore
referred to when constructing the main beam and the end links. The central
suspension link or frame plate I form with a parallel passage for receiving my
mproved bearing and I also carry this bearing when placed within the parallel

page_text: space provided within the frame plate "gallows or "check" upon circular ended
pins and their collars similarly to the manner in which I carry the end knife edges
of the beam. The side supports for the central knife edge I provide for by pinning
or securing small pieces of hardened steel on to the sides of the frame plate or
central suspension plate "gallows or "cheek so that the knife edge is held firmly
in its position by means of side hardened steel bearing pieces in the manner before
described for carrying the end knife edges.
By this system of constructing my beam, links, and central supporting frame,
out of flat metal, I am enabled to readily produce any desired number, and to
similarly produce a number of knife edges and loose fittings, so that each beam can
be mounted upon knife edges and fitted up with all its necessary attachments in
the manner hereinbefore described, while the reproduction and manufacture of such
fittings and separate parts can be most advantageously performed by machinery and
special tools instead of by skilled manual power as at present employed in the
ordinary systems of manufacture.
Dated this 20th day of August 1890.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Beams, and Fittings for the
same, for use on Weighing Machines.
I, WILLIAM BEILBY AVERY, of the firm of W. & T. Avery of 12 Digbeth,
Birmingham, in the County of Warwick, Manufacturer, 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:-
My invention has for its object the more expeditious construction and arrangement
of the fittings and parts forming the beams and levers of weighing machines,
whereby it is possible to produce such parts in large quantities, and thus to
cheapen the system of manufacturing and mounting the beams and levers employed
upon scales and other weighing machines.
In carrying my invention into effect when constructing a metal beam, I cast or
form my improved beam as a flat parallel piece of metal, in some cases having
holes formed within the same for lightening it, in any usual or ordinary manner.
That is to say I sometimes cast the beam as a thin plate of metal, or I cut it out
of a sheet of metal by means of punches and dies or by any well known mechanical
system for producing articles from the strip or sheet of metal. The ends of the
beam I maintain as unbroken or solid connections for receiving the knife edge
supports and the knife edges, by the peculiar and novel form in which I fashion
the extreme parts of the beam for enabling my improved knife edges to be employed,
when constructed in accordance with the system set forth and described in Letters
Patent granted to me upon the 1st day of February 1888 No. 1519. I prefer in
some cases to form the ends so that the beam terminates in a circle or portion of a
circle, and I drill or form a hole through this circular end through which I thread
my knife edge this knife edge I pin or secure to the beam in the manner set
forth in the Specification of Letters Patent above referred to.
I construct the bearing or support for the hanging shackle, arms, or links, so
as to pass through the hole left within the beam ends and of such a form that
each projecting end of the bearing receives or enters into the flat metal plate
which I employ as my hanging link or shackle. This hanging link or shackle I
construct out of metal sheet plate, or I cast it as a parallel plate of a shape to
suit any particular or peculiar requirement: the ends which stand immediately
above the knife edge I prefer to make circular to be of uniform character with the
head and collar of a pin which I pass through each end to form a supporting

page_text: surface to rest against or upon the upper portion of the vibrating knife edge
carried by the link plate. provide steel side bearings or contact pieces to
receive the knife edge when in position upon my open link bearing or shackle, by
attaching steel tongues or small strips within the open end of the link or lever
against which the steel bearing ends may rest. In another system I provide for
the side wear by constructing the steel side pieces as projecting strips with two
ears or end clips formed on each for the purpose of embracing the side of my link
bearing or shackle, and I pass pins through the clips and the metal of the shackle
thus serving the double purpose of securing the steel clip to the shackle and at
the same time forming the support for the knife edge bearing.
The central or main knife edge of the beam. I attach in the manner set forth in
the Specification of my Patent No. 1519 of 1888 before referred to; while the
corresponding bearing I carry within the central suspension frame or plate, which
plate I construct out of flat metal or strip similarly to the manner herein before
referred to when constructing the main beam and the end links. The central
suspension link or frame plate I form with a parallel passage for receiving my
improved bearing, and I also carry this bearing when placed within the parallel
space provided within the frame plate "gallows
"cheek
or
upon circular ended
pins and their collars similarly to the manner in which I carry the end knife edges
of the beam. The side supports for the central knife edge I provide for by
pinning or securing small pieces of hardened steel on to the sides of the frame
plate or central suspension plate "gallows or "cheek so that the knife edge
is held firmly in its position by means of side hardened steel bearing pieces in the
manner before described for carrying the end knife edges. By this system of
constructing my beam, links, and central supporting frame, out of flat metal, I am
enabled to readily produce any desired number, and to similarly produce a number
of knife edges and loose fittings, so that each beam can be mounted upon knife
edges and fitted up with all its necessary attachments in the manner hereinbefore
described, while the reproduction and manufacture of such fittings and separate
parts can be most advantageously performed by machinery and special tools
instead of by skilled manual power as at present employed in the ordinary systems
of manufacture.
In the accompanying drawing
"
"
Figure 1 shows in front elevation my improved beam A having its central
gallows or suspension frame B in position upon the central knife edge D and
bearing E; also one end shackle or open hanging link C shown in position upon
the end knife edge F and bearing G.
Figure 2 is a plan of the same arrangement.
Figure 3 is a front elevation of the central frame plate "gallows" or "cheek" B,
with its knife edge bearing E in position resting upon the pins or collars H, H.
Figure 4 is a reverse plan of the central knife edge bearing E.
Figure 5 is a front elevation of the shackle or open link plate C with the
knife edge bearing G in position against the pins or collar studs K, K; and
Figure 6 is a plan of the knife edge bearing G.
The beam A I make of any suitable metal or material, cast or formed out of
the sheet, the ends being of any desired form with holes provided for admitting
the free passage of the knife edge bearings for the shackles or open links; by
this arrangement permitting of the employment of a solid end rather than an
open jaw or simple outer surface support for the knife edge.
The shackle or link C, I construct of any desired shape or configuration out of
flat plate or sheet metal or material, and I keep the knife edge bearing G in
position by forming the ends of the bearing as a jaw with a recess G' therein to
receive the sides of the link or plate; and upon the inner sides of the plate which
meet the recessed surfaces of the knife edge bearing I secure steel bearing
springs C, C. Providing also stops or supporting pins with collars K for the
bearing to rest upon.
The centre " gallows" or "cheek" or suspension link B, I also form out of

page_text: plate or sheet, providing pins and collars H and hardened side spring bearing
strips b, to secure the knife edge bearing E in position; the recessed portion
of the bearing being of a width to receive the sides of the "cheek or gallows."
66
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1) The construction and arrangement of beams and their fittings for use on
weighing machines substantially as and for the purposes herein described and as
set forth.
(2) The construction of beams for use on weighing machines having solid ends
for receiving the knife edges and their bearings as herein described and as illustrated
in the accompanying drawings.
(3) The construction of knife edge bearings for attachment to weighing
machine beam, shackles, links, and suspenders, as herein described and as illustrated
in the accompanying drawings.
(4) The construction of suspending links, shackles and hanging links for use
upon weighing machine beams, substantially as herein described and as illustrated
in the accompanying drawings.
Dated this 20th day of May 1891.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.