Improvements in Fixed Poise Steelyards.
Year: 1891

page_text: Date of Application, 7th Apr., 1891
Complete Specification Left, 7th Jan., 1892-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Fixed Poise Steelyards.
We, HENRY JOHNSON AVERY, of Mill Lane, Birmingham, in the County of
Warwick, Weighing Machine Manufacturer, and SAMUEL JOSEPH ANSON, of
15 Bordesley Green Road, Birmingham, aforesaid, Engineer, do hereby declare
the nature of this invention to be as follows:-
Our invention has reference to the manner in which we construct and arrange
the suspending pan, hook or other receptacle for weighing articles of any description
whereby it is possible by increasing or decreasing the leverage to weigh unequal
amounts from the same end of the steelyard, without the necessity of removing the
goods, scale, or hook from the shorter arm of the steelyard. We are also enabled
to readily weigh loaves of bread of two pounds or four pounds, by a simple and
slight movement of our improved movable block or bracket carrying the suspending
knife edge and link.
In carrying our invention into effect we construct the steelyard with a long arm
having a fixed poise or weight at or near its end and having the fulcrum formed by
a knife edge fixed or formed upon the enlarged portion of the arm for the purpose
of receiving a shackle and hook from which the steelyard can be readily supported
by hand or in any convenient manner. The shorter arm of the steelyard we
construct in a peculiar manner by forming double chambers, recesses or seats for
permitting a movable knife edge bracket or block to rest either in one recess or the
other, for the purpose of weighing the lighter or heavier body as may be desired.
This movable knife edge bracket or block may be secured to the small arm of the
steelyard at a point preferably between the two chambers or seats, by forming a
central eye or boss upon the arm to which we pin our moving bracket or block.
We construct the bracket in one manner with projecting flanges or ribs at its outer
end so that it may embrace the lever when placed within either of its recesses and
thus be prevented from slipping out of its correct position for accurately weighing
any object supported in the pan or upon the hook carried upon its suspended shackle.
The block may also be made with V shaped ends fitting into corresponding V recesses
in the steelyard and may be made to drop into the recesses instead of being pivoted
as before described. We cause the knife edge for supporting the shackle from the
bracket to project beyond each side of the bracket and to be of any usual or
ordinary construction, and from this knife edge we suspend any usual form of
shackle or link. We sometimes cause the movable bracket or block to be
manipulated by means of a small handle, knob or projection which we form upon or
attach to the bracket, although for ordinary purposes of weighing bread we prefer
to remove the bracket from the outer or two pound recess to the inner or four pound
recess by means of the shackle alone. We prefer to construct the bracket of such
a thickness that it will fit on to the short arm of the steelyard and its extreme ends
formed as flanges embrace it when in either recess or chamber, or as previously
described with V shaped ends, recesses.
We attach any ordinary or usual form of pan or other receptacle to the shackle
suspended from the moving or pivoted bracket or block and we mark upon the
steelyard the weights which will be obtained by suspending from one recess or the
other, such as two pounds and four pounds or other amounts as may be desired.
Dated this 6th day of April 1891.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants,

page_text: COMPLETE SPECIFICATION.
Improvements in Fixed Poise Steelyards.
We, HENRY JOHNSON AVERY, of Mill Lane, Birmingham, in the County of
Warwick, Weighing Machine Manufacturer, and SAMUEL JOSEPH ANSON, of
15 Bordesley Green Road, Birmingham, aforesaid, Engineer, 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 :-
Our invention has reference to the manner in which we construct and arrange
that part of a steelyard which carries the knife edges whereby it is possible by
increasing or decreasing the leverage to weigh both large and small loads, without
the necessity of removing the load.
We
In carrying our invention into effect in one manner as shown on Sheet 1 of the
accompanying drawings we construct the steelyard shown in elevation in Figure 1,
with a fulcrum C by which the steelyard is suspended and a long arm A having a
fixed poise or weight Bat or near its end. The shorter arm A of the steelyard we
construct by forming double chambers, recesses or seats u, a' for permitting a
inovable bracket or block carrying the knife edge K of ordinary construction, to
rest either in one recess or the other, thus varying the leverage of the steelyard,
for the purpose of weighing a lighter or heavier load as may be desired.
prefer this form of constructing our steelyard when weighing two fixed loads. The
inovable bracket may be secured to the steelyard at a point a² preferably between
the two chambers or seats by forming a central eye or boss upon the arm, to which
we attach or pivot our moving bracket or block. We prefer to construct the
bracket F in one manner as shown in elevation at Figure 2 and in plan at Figure 3
with projecting flanges or ribs f, f at its outer end so that it may embrace the
arm A³ when placed within either of its recesses a, a¹ and thus be prevented from
slipping out from its correct position; but the bracket F may also be embraced by
flanges upon either side of the arm A² as shown in side elevation at Figure 34 and
plan at Figure 3B on Sheet 1 of the drawings.
The block may also be made with V shaped ends fitting into corresponding
recesses in the steelyard so that it may be detached and dropped into the recesses
instead of being pivoted as before described. This is shown at Figure 6.
We also construct our movable bracket or block to turn horizontally and describe
a semicircle upon a central pivot as shown in Figure 7 which is a plan. The
swinging piece may be secured in either position in any convenient manner as by
allowing a slight projection to spring into a corresponding depression such as.a
Figure 7.
We also arrange the movable bracket or block to slide horizontally into varying
positions along the short arm of the steelyard and secure it by means of a screw or
pin as shown in Figure 8.
At Figure 9 we show an arrangement of sliding block when the block is actuated
by a screw.
At Figure 10 we show an arrangement where a pinion u and rack v is used to
move the block.
We sometimes carry our fulcrum on main knife edge C fixed in a movable
bracket L as shown in Figure 4, either in addition to or in substitution for the
movable bracket F.
The movable fulcrum or main knife edge bracket L we arrange in similar ways
to the bracket F as hereinbefore described in order to vary the position of the
fulcrum.
We sometimes cause the movable bracket or block F or its equivalent to be
manipulated by means of a small handle, knob or projection which we form or
attach to the bracket, although for ordinary purposes we prefer to move the bracket
from the outer to the inner position by means of the shackle H alone,

page_text: We also apply our movable blocks or brackets to graduated steelyards as shown
at Figure 5 Sheet 2 in which B¹ is the sliding weight or poise and the movable
bracket F is constructed in any of the ways hereinbefore described when applied
to the fixed poise steelyard.
Throughout the drawings the same letters indicate the same or similar parts.
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 a steelyard, a movable piece or block carrying knife edges; the said
movable piece or block being so arranged as to permit varying leverages to be
obtained from the same steelyard, substantially as and for the purposes hereinbefore
described.
(2) In a steelyard employed for weighing two or more fixed loads, the combina-
tion of a fixed poise as B with a movable piece, block or bracket such as F,
whether the said piece as F be hinged to move in a vertical, horizontal or other
plane, or be arranged to lift out or to slide, substantially as and for the purposes as
hereinbefore described and illustrated at Figures 1, 2, 3, 34, 3, 4, 6, 7, 8, 9, and 10
of the accompanying drawings.
(3) In a steelyard for weighing loads which vary in any predetermined ratio,
the combination of a movable poise as with a movable piece, block, or bracket as F,
whether the said piece as F be hinged to move in a vertical, horizontal or other
plane or be arranged to lift out or to slide, substantially as and for the purposes
hereinbefore described and illustrated at Figure 5, and Figures 2, 3, 34, 38, 4, 6,
7, 8, 9, and 10 of the accompanying drawings.
(4) The several arrangements of steelyards having movable blocks as herein-
before described and as illustrated in the two sheets of accompanying drawings.
Dated this 6th day of January 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.