Improved Steelyard Weighing Machine.
Year: 1893

page_text: Date of Application, 26th Sept., 1893-Accepted, 18th Nov., 1893
COMPLETE SPECIFICATION.
Improved Steelyard Weighing Machine.
JOHN STEVENS of Longsmith Street, Gloucester, Maker of Weighing
nstruments, do hereby declare the nature of this invention and in what manner the
ame is to be performed, to be particularly described and ascertained in and by the
ollowing statement :—
D
munwing sheet of drawings in which
Fig. 2 is a top view of base plate A.
Fig. 3 is a top view of lever B and pins F, F1, F".
Fig. 4 an end view of slot guide C.
Fig. 5 an end view of ball D.
Fig. 6 an end view of curved standard E.
Fig. 7 an end view of shackle i.
Fig. 8 an end view of shackle G.
The improved steelyard weighing machine, is of a pattern known as the steelyard
type, viz., a lever B with unequal arms suspended by a shackle i, from a curved
standard E. which is bolted to a baseplate A. The end of the long arm of lever,
moves in a slot guide C, which is also bolted to baseplate A.
At certain distances in the long arm of lever, steelpins with knife edges are
firmly fixed, and from these knife edges a ball D is suspended, but the ball can be
moved from one pin to another as from F. to F¹ or F, by simply raising the ball
till the slot S is level with the pins and carrying the ball to the required pin.
In the short arm of lever (B), a shackle (G) is suspended from a steel pin with
knife edge, to this shackle is suspended a sheet iron scoop, or scale pan, (not
shewn), and connected by a hook and chains, and when required is securely fastened
to shackle (G). Into this scoop or scalepan is placed the goods to be weighed.
A flat iron pin (H.) slightly taper is chained to standard (E), and this pin is
inserted into the space (n) between standard (E) and lever (B), when the machine
is not in use, this raises the lever and consequently the knife edge (K) from its
bearing in shackle (i).
The knife edges and bearings are hardened.
In the drawing annexed the ball (D) is shewn suspended from (F) and in this
position equilibrates with 56 lbs. in the scoop or scalepan.
If the ball be moved to (F) it will balance 28 lbs. in the scoop, if moved to (F"),
then 14 lbs. in the scoop will. produce equilibrium. The weights indicated are
marked on the lever close to their respective pins. The scoop can be hooked to
standard (E) when not in use. The machine can be fixed on a vehicle, or bench,
platform, or, a projecting beam. For weighing 1 cwt. the lever, and base plate
are 12 inches longer and, the scoop or scale pan proportionately larger, the other
The No. of steelpins in
parts being similar to those shewn in annexed drawing.
the long arm vary with the capacity, and also with the requirements of the
particular trade for which it is intended to be used. Thus the 1 cwt. machine for
coal would have four steel pins so as to weigh 28 lbs. 56 lbs. 84 lbs. or 112 lbs.
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 1
claim is,
1. That by the arrangements of inserting the pin (H) into the space (n), and
also lifting the ball (D) off the steelpin so that it will rest on the baseplate, and by
hooking the scoop to standard (E), the knife edges of the machine, are practically
free from their bearings, and also from the sliding friction caused by the motion of

page_text: vehicle, which is so destructive to the knife edges of a weighing instrument when
used on a vehicle. This I consider is a new arrangement.
2. That no weight other than those marked on the long arm of lever can be
weighed.
With the ordinary pattern of steelyard you may get as many different weighings,
as different positions of the ball or poise, but with my invention, if the ball is not
placed upon one or other of the steelpins in the long arm, it will rest upon the base
plate, and the lever will at once rise to the top of slot guide (C) for the reason
that the weight of the scoop alone is more than sufficient to cause the lever to
rise.
3. That the arrangement of the lever being supported by a shackle fastened to
a standard, both of which pass through the lever, and allows the lever to move
longitudinally, is new.
JOHN STEVENS,
Longsmith Street, Gloucester.