Improvements relating to Steelyards.
Year: 1896

page_text: Date of Application, 22nd June, 1896
Complete Specification Left. 22nd Mar., 1897-Accepted, 1st May, 1897
Improvements relating to Steelyards.
I, WILLIAM BEILBY AVERY, 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:-
This invention consists of improvements relating to steelyards, my object being
to provide more simple means than exists with the appliances at present in use,
for increasing or decreasing the effective length of the short arm of the lever, and
also for preventing undue movement or oscillation of the steelyard.
In providing means in accordance with my present invention for increasing or
decreasing the effective length of the short arm of the lever for the purpose of
weighing either light or heavy loads, I fix upon the short arm two or more knife
edges at varying distances from the fulcrum. The load to be weighed is suspended.
froin a hook or other ordinary attachment at the lower end of a shackle embracing
the short arm and having a knife edge bearing, secured at its upper end. The
shackle can be readily moved along the short arm in either direction, thus shifting
the bearing from one to the other of the knife edges as may be required.
When employing but two knife edges on the short arm I sometimes connect the
shackle with its attached bearing to a pivot pin by a pair of connecting links, the.
pivot being situated midway between the two knife edges, thus allowing the bearing
to be readily turned from one to the other.
To prevent undue movement or oscillation before the attached load or weight is.
balanced, I fix a stop pin to the steelyard suspension shackle, such pin passing.
through an aperture preferably on the long arm side of the lever. The aperture is
of sufficient size to permit of the necessary movement of the lever for the weighing
operation, but the movement is limited to the amount of space or clearance provided
between the stop pin and the aperture through which it is inserted, and I am thus...
enabled to prevent any violent oscillation.
Dated this 20th day of June 180R
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.
I, WILLIAM BEILBY AVERY, of the Firm of W. & T. Avery Limited,.
Weighing Machine Manufacturers, of Digbeth, in the City of Birmingham, do
5 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 consists of improvements relating to steelyards, my object being

page_text: to provide more simple means than exist with the appliances at present in use, for
increasing or decreasing the effective length of the short arm of the lever, and also
for preventing undue movement or oscillation of the steelyard.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to:-
Figure 1 is a side elevation of a portion of a steelyard having my improved
means for varying the effective length of the short arm, and also my improved
means for preventing undue movement or oscillation of the steelyard.
Figure 2 is a similar view of a steelyard having a modified arrangement of my
improved means for, varying the effective length of the short arm.
In providing means in one convenient manner in accordance with my present
invention for increasing or decreasing the effective length of the short arm of the
lever for the purpose of weighing either light or heavy loads, I fix upon the short
arın two or more knife edges, such as A Figure 1, at varying distances from the
fulcrum. The load to be weighed is suspended from a hook or other ordinary
attachment at the lower end of a shackle B embracing the short arm and having a
knife edge bearing secured at its upper end. The shackle can be readily moved
along the short arm in either direction, thus shifting the bearing from one to the
other of the knife edges as may be required. The short arm is so constructed
that the shackle B cannot rest in any position, but upon one of the knife
edges A.
When employing but two knife edges on the short arm I sometimes connect the
shackle B with its attached bearing to a pivet pin C Figure 2 by a pair of
connecting links, the pivot being situated mid-way between the two knife edges,
thus allowing the bearing to be readily turned from one to the other.
My improved means for preventing undue movement or oscillation before the
attached load or weight is balanced is illustrated at Figure 1. I fix a stop pin D to
the steelyard suspension shackle E, and make such pin to pass through an aperture
preferably on the long arm side of the lever. The aperture is of sufficient size to
permit of the necessary movement of the lever for the weighing operation, but the
movement is limited to the amount of space or clearance provided between the stop
pin and the aperture through which it is inserted, and I am thus enabled to prevent
any violent or unnecessary oscillation..
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. The improved means for varying the effective length of the leverage of the
short arm of a steelyard, substantially as described and as illustrated.
2. The improved means for preventing undue movement or oscillation of a
steelyard, substantially as described and as illustrated at Figure 1.
Dated this of March 1907
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.