Improvements in Steelyaras.
Year: 1894

page_text: Date of Application, 15th Oct., 1894
Complete Specification Left, 18th July, 1895-Accepted, 24th Aug., 1895
Improvements in Steelyaras.
I, CHARLES HENRY BARTLETT of 2 and 3 Welsh Back, Bristol, in the County
of Gloucester, Scale Maker and Manufacturer of Tea Mixing and Cutting
Machines, do hereby declare the nature of this invention, to be as follows:-
My improvements in steelyards relate chiefly to the adaptation of the apparatus
for weighing either light or heavy loads, and it has for its object to enable the
transition from the one to the other denomination of standard weight to be made
quickly and without altering the suspension of the steelyard or shifting the centres,
and to enable both denominations of weights to be read off on the same side of the
steelyard. The improvements also relate to the carriage of the jockey weight and
have for object to prevent the weight from running along the tail of the steelyard
when the latter is suddenly canted by the load being put on or taken off, and also
to enable the scales corresponding to both denominations of standard weights to be
read off on the same side of the tail.
The load end of the steelyard is furnished with two sets of knife edges at
different distances from the point of suspension, and a single hanger provided with
two corresponding sets of knife edge bearings is adapted to be suspended from the
one or other set of knife edges, according as the suspension hook carrying the load
is placed at one or other of two positions on the hanger. This is done without
detaching the hook by providing the hanger with a yoke or slotted link, on or in
which the load suspension hook is adapted to slide, the yoke or link extending in
such relation to the knife edge hearings that the load will be pendent wholly from
the one or other set of knife edges, according as the hook is placed at one or other
end of the yoke or link, which is of double inclined form so that the hook will
remain at whichever end it is for the time being placed.
The carriage of the jockey weight is mounted upon a roller adapted to
run upon the tail of the steelyard which is notched for engagement with a
nib on the carriage, the notches being in the lower instead of the upper
edge of the steelyard the carriage being adapted to act as a lever rocking
upon the roller as a fulcrum for engaging and disengaging the nib with or
from the notches and the jockey weight being suspended from the carriage at the
opposite side of the fulcrum to the nib so that the latter will be forced by the gravity
of the weight into engagement with the notched edge of the steelyard and there
held, whatever may be the inclination of the steelyard or however suddenly it may
be changed. The carriage is provided with a band lever for rocking it on its
fulcrum in order to disengage the nib from the notches and shift the carriage along
the steelyard. The nib serves as the index with reference to the markings of a
scale appropriated to one denomination of weight and whose graduations correspond
to the notches in the usual manner, whilst a second index is provided for reference
to a scale marked near the upper edge of the same face of the steelyard and
appropriated to another denomination of weight.
Dated October 18th 1894.
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.

page_text: 1, CHARLES HENRY BARTLETT, of 2 and 3, Welsh Back, Bristol, in the County
of Gloucester, Scale Maker and Manufacturer of Tea Mixing and Cutting
Machines, 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, first, to render a steelyard self-adaptable for
weighing either light or heavy loads and to fácilitate the transition from one to the
other of these operations without any manual alteration of position of the centres
upon which the load is hung, or of the centre of suspension of the steelyard itself."
The invention has, secondly; for object to prevent the jockey, weight from
running down the tail of the steelyard when the latter is caused to assume an
extremely inclined position in consequences of the load being suddenly put on or
taken off, and also to enable the scales corresponding to both denominations of
standard weights to be read off on the same side of the tail.
The invention will be described with reférence to: the accompanying,drawings,
forming part of this Specification; wherein
Figure 1 is a front elevation of the steelyard when not in use.
Figure 2 is a similar view shewing in full and dotted lines the positions.assumed
when weighing a heavy and a light load respectively.
Figure 3 illustrates the self sustaining action of the jockey weight carriage when
the load is suddenly removed.
.
Figures 4 and 5 are transverse sections on lines 14-41 and 5-5 · Figure 1,
respectively.
Figures 6 and 7. are respectively sidecand end elevations of the jockey weight
carriage, drawn to a larger scale.+
The same letters of reference denote like parts in: all the figures.
"
The steelyard A, A', is suspended in the usual manner by its main centre of
suspension a in a hanger or shackle B, and the short arm or load end A, of the
steelyard is furnished with two sets of knife-edged centres.cc situated at different
distances from the centre of suspension a, the ratio of leverage being such that the
notches, or certain of them, on the lower edge of the tail will correspond to the
divisions of both scales. The short arm A, is straddled by a single hanger or
shackle C which is provided with two sets of Abearings, c; corresponding to the
two sets of knife edges, e; and also with a double set of anti-friction plates ct; c
adapted to bear against the bevelled points of the knife edges c, c; in the usua!
manner, for the purpose of maintaining the central position of the steelyard in the
hanger. The hanger C is caused to take its bearing upon the pair of knife edges c
or on the pair e, according as the load suspension..hook E is placed at the one or
other end of a yoke or link D. forming, part of the hanger C. This yoke or link
extends in such relation to the knife edge bearings (that is to say is. of a length
extending in the plane of the steelyard so far. beyond the centres!c, c'; on either
side that the hanger when supporting a load will be caused to assume an inclined
position; as shewn in Figure 2, such that it will be lifted. entirely off the one pair
of knife edges and so leave the load entirely: pendent from that pair of knife edges
corresponding to the end of the yoke or link at which the load suspension hook E
happens to be placed.
In the example shewn D is a slotted link through the slot d of which the swivel
head of the hook E passes and in order to prevent the possibility of the load being
supported by both sets of centres at once the yoke or link D is made of double
inclined or shape so that the load suspension hbok cannot possibly remain in an
intermediate position but will run quite to that end of the yoke towards which it is

page_text: placed where it will be retained by dropping into one or other of the notches:dd²;
at the extremities of the slot d:-
It will thus be obvious that the only alteration of position required in changing
from a heavy load to a light one, or vice versa,sis..to shift the hook E. from the
end, to the end. d. It will also be apparent that the shifting of the hook E does
not involve any liability of damage to the knife edge centres c or c', as might be
produced by a sudden blow or other cause arising from careless handling, were the
hanger or shackle.C. itself..to..be..bodily transferred.from..one set of centres to the
other, or were the centres themselves carried by a pivoted shackle which is thrown
over from one to another position according to the requirements of the load to be
weighed.
The carriage F from which the jockey weight G is suspended is mounted upon a
roller resting and running upon the upper edge of the tail A of the steelyard
which is notched on the lower, instead of on the upper, edge for engagement by a
nib, forming part of the carriage, the relative positions of the nib ', the roller f,
and the weight G, being such that the nib f, will be held by the gravity of the
weight in engagement with the notched lower edge of the steelyard whatever may
be the inclination of the latter or however suddenly its position may be changed, as
indicated in Figure 3. The carriage F acts as a lever having a rolling fulcrum f
upon which it may be rocked by means of the thumb lever and moved in order
to disengage the nib from the notches and to shift the carriage along the steelyard
as indicated by the dotted outline, Figure 6. The nib f, serves also as the weighing
index with reference to a scale Ĥ Figure 6 marked on the face of the steelyard
towards its lower edge and to whose graduations the notches correspond, this scale
being appropriated to, say, the heavier range of loads; the carriage being provided
with a second index i moving along in front of the upper edge of the steelyard and
referring to a scale I marked along the same face of the steelyard near the upper
edge, this scale being appropriated to, say, the lighter range of loads. When,
therefore, the load suspension hook is placed at the end d¹, of the link D for
weighing heavy loads, the reading will be taken on the scale H and when
placed at the end d, for weighing a light load the reading will be taken on
the scale I.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. The combination, with the short arm of a steelyard, of two sets of knife edge
centres at different distances from the centre of suspension and of a single hanger
provided with two sets of bearings adapted to rest on either set of centres
indifferently, and having a shifting connection with the load suspension device
whereby the load may be caused to bear through the hanger entirely upon the one
or other set of centres, as and for the purpose specified.
2. The combination, with the short arm of a steelyard, of two sets of knife edge
ceutres at different distances from the centre of suspension and of a single hanger
provided with two sets of bearings adapted to rest on either set of centres
indifferently, and provided with a rigid yoke or link adapted to permit of a shifting
connection with the load suspension shackle, the yoke or link extending beyond the
knife edge centres as to cause the load suspension hook when at the one or other
end of such link to bear, through the hanger, entirely upon the one or other set of
centres, substantially as and for the
purpose specified.
3. The combination, with a steelyard having notches in its lower edge, of a
carriage for the jockey weight adapted to act as a lever having its fulcrum movable
upon the upper edge of the steelyard, and having a nib which is caused to engage
with the notched lower edge by the gravity of the weight, substantially as and for
the purpose specified.
4. The improved steelyard herein described, consisting of a steelyard provided
with two sets of knife edge bearings and a hanger self-adjusting thereon, as described,

page_text: in combination with a jockey weight carriage adapted to engage with the notched
lower edge of the steelyard and provided with indexes referring to two scales upon
the same face of the steelyard, as specified.
Dated this 18th day of July 1895
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.