Improvements in Steelyards and like Weighing Appliances.
Year: 1894

page_text: Date of Application, 7th Dec., 1894
Complete Specification Left, 9th Sept., 1895-Accepted, 19th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Steelyards and like Weighing Appliances.
1, WILLIAM BEILBY AVERY, Managing Director of the Firm of W. & T. Avery
Limited, Weighing Machine Manufacturers, of Digbeth, in the City of Birmingham,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in steelyards and like weighing appliances,
my object being to so construct and arrange such appliances that the relative
positions of the fulcrum and the point of suspension of the load may be readily
altered for the purpose of accurately weighing varying loads without adjustment of
the counterpoise.
In carrying my invention into effect I construct a steelyard of the usual general
configuration having a counterpoise upon its long arm. The steelyard is suspended
by a hook and shackle from its fulcrum formed by a knife edge fixed or attached
at the required position. The load to be weighed is attached to a hook and shackle,
or placed in a pan or other receptacle, having at its upper end a suitable bearing
and attached to side plates or discs mounted upon a pivot supported on the short
arm side of the steelyard fulcrum. The side plates or discs are connected by a
spiral or other suitable spring connection, in such a manner as to allow of their
being readily turned or revolved, and to permit grooves or projections formed upon
their adjacent sides to engage with corresponding projections or grooves upon the
steelyard, and thus to lock or secure them when in position adjacent to each
other.
Upon the short arm of the steelyard I provide two knife edges, arranged on
opposite sides of the pivot of the side plates or dises, in such positions that when
the discs with the attached suspending shackle are turned in either direction, its
bearing is brought to rest upon one or the other of the knife edges. When weighing
the heavier loads the shackle is caused to rest upon the knife edge adjacent to the
steelyard fulcrum, but for lighter loads the shackle is turned over on to the outer
knife edge, thus increasing the turning moment of the load about the fulcrum, and
enabling it to be weighed with but little if any adjustment of the counterpoise or
weight upon the long arm of the lever.
The grooves and projections upon the side plates or discs and the steelyard, are
in such positions as to be caused to engage with each other by the action of the
spring connection when the shackle is resting upon either of the knife edges. The
spring connection further gives perfect freedom to the shackle when resting on
either of the knife edges.
I employ a counterpoise or weight of any ordinary description and cut or mark
any required scale or measure upon the steelyard, and 1 make such modifications in
the construction and arrangement of my improved weighing appliance as may be
required to suit varying services.
D
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La 100
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Steelyards and like Weighing Appliances.
I, WILLIAM BEILBY AVERY, Managing Director of the Firm of W. & T. Avery
Limited, Weighing Machine Manufacturers, of Digbeth, in the City of Birmingham,
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 relates to improvements in steelyards and like weighing appliances,
my object being to so construct and arrange such appliances that the relative
positions of the fulcrum aud the point of suspension of the load may be readily
altered for the purpose of accurately weighing varying loads.
In the accompanying sheet of explanatory drawings Figure 1 is a part front
elevation of my improved steelyard, and Figure 2 is an end clevation of the same.
Figure 3 is a plan with part of hook removed.
Figure 4 is a sectional plan showing the side plates, and the method of pivoting
and locking for the same.
Figures 4 and 4" are enlarged details of the locking caps and ends of the side
plates.
In carrying my invention into effect I construct a steelyard of the usual general
configuration having a counterpoise upon its long arm A. The steelyard is
suspended by a hook B, and shackle C, from its fulcrum formed by a knife edge D
fixed or attached at the required position. The load to be weighed is attached to
a hook and shackle E, or placed in a pan or other receptacle, having at its upper
end a suitable bearing and attached to side plates or discs E' E, mounted upon a
pivot supported on the short arm side A of the steelyard fulcrum. The side
plates or discs E' E, are connected by a spiral or other suitable spring connection G,
in such a manner as to allow of their being readily turned or revolved, and to
permit grooves or projections e e', formed upon their adjacent sides to engage with
corresponding projections h or grooves upon end washers H, or upon some portion
of the steelyard arm A, and thus to lock or to secure them when in position adjacent
to each other.
Upon the short arm A' of the steelyard I provide two knife edges KK, arranged
on opposite sides of the pivot of the side plates or dises E 2, in such positions
that when the discs with the attached suspending shackle are turned in either
direction, its bearing L is brought to rest upon one or the other of the knife edges.
When weighing the heavier loads the shackle is caused to rest upon the knife
edge K adjacent to the steelyard fulcrum D but for lighter loads the shackle is
turned over on to the outer knife edge K', thus increasing the turning moment of
the load about the fulcrum D.
The grooves and projections h, e, e' upon the side plates or discs E' E² and the
steelyard or washer caps H, are in such positions as to be caused to engage with
each other by the action of the spring connection G when the shackle is resting
upon either of the knife edges. The spring connection further gives perfect
freedom to the shackle when resting on either of the knife edges K K
I employ a counterpoise or weight of any ordinary description and cut or mark
any required scale or measure upon the steelyard, and I make such modifications in
the construction and arrangement of my improved weighing appliance as may be
required to suit varying services.
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 improvements in connection with steelyards substantially as and for the
purposes herein before described and as illustrated in the accompanying drawings.

page_text: 2. In a steelyard the combination and arrangement of a pivoted or moving
fulcrum or knife edge bearing mounted upon or between two side plates, bars or
discs, and made capable of resting upon an inner or an outer knife edge such as K K',
substantially as and for the purposes herein before described and as illustrated in
the accompanying drawings.
3. In a steelyard the method of connecting two side plates or discs together by
means of a spring and having locking pins, keys or projections upon one part or
parts which unite or engage with corresponding recesses, or grooves in another part
or parts, substantially as and for the purposes hereinbefore described, and as
illustrated in the accompanying drawings.
Dated this 5th day of September 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birminghain, Agents for the Applicant.