Improved Portable Weighing Machine to Weigh Carts and other Goods.
Year: 1892

page_text: Date of Application, 25th Aug., 1892
Complete Specification Left, 25th May, 1893-Accepted, 25th Aug., 1893
PROVISIONAL SPECIFICATION.
Improved Portable Weighing Machine to Weigh Carts and other
Goods. .
WALTER YATES Builder 56 Kirkmanshulme Lane Longsight near Manchester
in the County of Lancaster do hereby declare the nature of this invention to be
as follows:
To describe the manner by which I propose to construct the said improved
portable weighing machine. Say I provide a strong wood frame, for the purpose
of forming a good ground bed, on which to erect and secure a pair of wood framed
headstocks, the centre uprights of which are slotted on the top, for the purpose of
guiding and steadying a beam or crosstree (to which is fixed the weighing apparatus
hereafter to be described) working therein in a rising and lowering motion.
At the bottom of the slots, metal frames are provided with toothed wheels therein
to work in an horizontal position, the wheels have holes through the centre, which
are tapped or threaded for screws to work in, in the manner of screw lifting jacks.
The top end or heads of the lifting screws are formed square, and confined in square
holes made underneath in each end of the crosstree.
Screw worms are fitted to the sides of the toothed wheels, outside each headstock,
the screw worm shafts are extended to the back of the headstocks, and crank
handles fixed on the ends for the purpose of turning them, on these shafts being
turned they cause the toothed wheels to revolve (known as the worm and wheel
motion) causing the lifting screws to rise or fall in consequence of the heads being
confined in the square holes of the crosstree, and not being allowed to turn with the
wheel.
By these means power is provided for easily lifting the weighing apparatus and
the cart simultaneously, untill the wheels of the cart are clear off the ground, and
the cart rests entirely on the graduated weighing centres of the apparatus.
Levers are fixed on to the ground frame and arranged so that a prop under the
cart shaft can be used to take up the forward weight carried by the horse, and
throw it back on to the weighing centres.
The weighing apparatus is constructed and fixed on to the crosstree as follows:
viz. Underneath and parallel with the crosstree, two levers, are suspended resting
on knife edge fulcrums at the outer or headstock ends, and each lever extending to
the centre of the crosstree, where they rest on knife edges formed in two forks or
slots, which are hung and attatched with a loose swivel motion, to a centre rod,
which passes upwards through the crosstree, to be connected and suspended from
the steelyard on knife edges.
The fulcrum of the steelyard is formed to rest on and between a short forked or
slotted standard fixed on the top of the crosstree, from which the steelyard is
balanced and graduated to suit requirements.
On the levers beneath the crosstree, weighing points are graduated back from
the direct weighing centre, for the purpose of manifoldly increasing the capacity of
weighing on the steelyard.
Resting on the graduated weighing points, two strong pins are adjusted and
extended upwards sufficiently long to pass through the crosstree and space provided
for the steelyard, also to pass and protrude above through holes (provided to steady and
keep the pins in a vertical position clear through the holes in the crosstree to avoid
friction) formed in a flat plate bar, which is fixed over and paralell with the cross-
tree, the pins protrude through on the top sufficient to take on the axletree of a
cart clear of all other parts of the machine.
To weigh the bed of the machine must be placed solid on level ground, and the

page_text: cart backed over it until the axletree of the cart is over and paralell with the
crosstree of the machine, the crank handles are then turned untill the weighing pins
press firmly under the axletree, then fix the prop under the shaft, with the bottom
end bearing on the end of the lever provided for throwing the forward weight back
on the weighing centre, turn the crank handles again untill the cart wheels are
lifted clear off the ground and all the weight is resting on the weighing pins.
The gross weight can then be balanced on the steelyard, tare for the cart must
be taken before loading or after discharging the lond. To weigh other goods a
removable platform is adjusted on the top of the weighing pins the tare of which
must be deducted in weighing.
Dated this Twenty-fourth day of A nouat 1002
· COMPLETE SPECIFICATION.
Improved Portable Weighing Machine to Weigh Carts and other
Goods.
I, WALTER YATES Builder 56 Kirkmanshulme Lane Longsight near Manchester
in the County of Lancaster 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 :-
In order to enable it to be understood how I purpose to construct the said
portable weighing machine, 1 annex hereto drawings illustrative thereof, and have
marked the same with figures and letters of reference corresponding with those in
the following explanation thereof.
Fig. 1. in the annexed drawing shows the machine under the axletree of a cart
in position for weighing.
Fig. 2. is the plan of the frame of the ground bed, with plan of levers for taking
up forward weight and conveying it back to a weighing centre, also plan of the top
of crosstree or beam.
Fig. 3. shows the steelyard k and transverse section through the crosstree on
line A-B (Fig. 1.).
Fig. 4. shows framed elevation of headstock, with worm, shaft, and crank
handle.
Fig. 5. shows transverse section through headstock on line C-D (Fig. 1.) showing
the slot without the crosstree.
Figs. 6, 7, 8, and 9 are detached sectional views, drawn to a larger scale.
On the ground bed frame Fig. 2. a pair of framed headstocks p. p. Fig. 1. are
erected and secured, both of which are slotted on the top, for the purpose of guiding
and steadying a beam or crosstree a. a. Fig. 1. (to which beam or crosstree is fixed
the weighing apparatus hereafter to be described) working therein with a rising or
lowering motion.
At the bottom of the slots in the headstocks and underneath each end of the
crosstree, metal frames are fixed provided with toothed wheels to work therein in
an horizontal position: the wheels have holes through the centres which are tapped
or threaded for screws s. Fig. 4. to work in, in the manner of screw lifting jacks.
The top ends or heads of the lifting screws are formed square and confined in
square holes y Fig. 4. made underneath in each end of the crosstree a. a.
Screw worms w Fig. 6. are fitted to the sides of the toothed wheels either inside
or outside each headstock, the worm shafts are extended to any length convenience
may require, and crank handles Fig. 4. are fixed on the ends for the purpose of
turning them, on these shafts being turned, the screw worms cause the toothed
wheels to revolve (known as the worm and wheel motion) causing the lifting
screws & Fig. 5. to rise or fall in consequence of the square heads on the screws
being confined in the square holes in the crosstree and not being allowed to tury
with the wheel,

page_text: Thus by those means power is provided for lifting the weighing apparatus and
the cart simultaneously, untill the wheels of the cart are clear off the ground,
and all the weight is poised and resting on the graduated weighing points or
centres of the apparatus by means of the axletree of the cart resting on the
pins nn Fig. 1. and a prop i Fig. 1. placed under the cart shaft and resting on
the end of the lever Fig. 1.
Two levers x and y Fig. 2. crossing each other at right angles and at the centre
of each from their respective bearings are fixed on to the ground frame for the
purpose of taking up the forward weight as carried by the horse and conveying it
back to the lever e Fig. 1. The principles here involved by the use of the levers e
and y is one of the main features in this invention, which are as follows, viz. --The
lever a supporting the forward weight of the cart at one end, by being loosely
shackled down at the other end, and at its centre suspended from the lever y
it conveys or levers back double the actual weight supported, on to the centre
of the lever y; again the lever y being supported at one end on a knife edge
fixed to the ground frame Fig. 1. and 2. and at the other end suspended from the
shackle u Fig. 1. which hangs from the lever e, the lever y thus divides equally the
double weight conveyed to it by the lever a centering one half the weight on
the knife edge support, h. and the other half of the weight on the lever e, thus
restoring and conveying to the lever e the nett or actual weight supported at the
end of the lever æ.
The other part of the weighing apparatus is constructed and fixed to the crosstree
as follows: viz.:-Underneath and parallel with the crosstree, two levers e. e. Fig. 1.
are suspended resting on knife edge fulcrums Fig. 1. at the ends near the head-
stocks, and each lever extending to the centre of the crosstree, where they are
suspended and rest on knife edges formed in two forks or slots d Fig. 1. and 3. which
are hung and attached with loose swivel motion to a centre rod c Fig. 3., which
passes upwards through the crosstree to be connected and suspended by means of a
slotted hook formed on the end of the rod, from each side of the steelyard on knife
edge studs projecting therefrom j. Fig. 3.
The fulcrum studs of the steelyard are formed to rest on and within a short
slotted standard Figs. 1. and 3. fixed on the top of the crosstree, from which the
steelyard is balanced, and graduated to suit requirements. At points on the
levers e. e. knife edge bars or studs are fixed through and protrude from each side
of the levers. From these knife edge studs on the levers, e, e, loose shackles u
Fig. 1. also Figs. 7 and 8. are suspended, and are formed and arranged to support
the forked or slotted pins n. n. below or lower than the fulcrums on the levers e. e.
thus to form a swivel motion for the purpose of centering the pins n. n. and keeping
them in a vertical position to minimise friction in the steadying holes as hereafter
mentioned the pins resting on the shackles . extend upwards through the
crosstrec, and protrade through holes formed in flat plates 1, Fig. 1. provided for
the purpose of steadying the pins an in a vertical position clear of any obstruction,
the pins protrude on the top sufficient to take on the axletree of a cart clear of all
other parts of the machine."
:
The arrows drawn on the levers Fig. 1. and near the levers Fig. 2. point to
denote the interaction of the levers, showing how the weight is made to converge
on the levers to the centre rod c which is suspended from the steelyard.
To weigh the bed of the machine must be placed solid on level ground, and the
cart backed over it, untill the axletree of the cart is over and parallel with the
crosstree of the machine, the crank handles are then turned untill the pins n. n.
press firmly under the axletree of the cart, then fix the prop i under the cart shalt
with the bottom end of it bearing on the end of the lever r, turn the crank handles v
again untill the cart wheels are clear off the ground, and all the weight resting on
the weighing apparatus, the gross weight can then be balanced on the steelyard,
tare for the cart as is usual must be taken before loading or after discharging the
load.
To weigh other goods (this is only a supplementary part of the machine for

page_text: which make no claim, but as it is mentioned in the title 1. show how it is to
be performed) a removable platform Fig. 9. is adjusted over the pin n, supported
and resting by means of the cantilevers o, o on studs on the outside of the fork
at the lower end of the pin n, so as to leave the pin a little free play in the
socket m at the top, to avoid binding the pins in the steadying.holes formed in
the flat plates 1. and thus minimise friction by the weight being centred at the
bottom of the pins, this arrangement is used in duplicate at both pins n. n. so
as to support the platform at both ends. A special loose counterpoise weight
is provided to balance the extra weight of this platform.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare what I
claim is
1st. The headstocks as provided with slots, for the purpose of guiding and steadying
the beam or crosstree with all the weighing apparatus as attached thereto in a
rising or lowering motion.
2nd. The pins n. n., and shackles as applied for the purpose of avoiding
lateral or side friction as the weight is being taken up simultaneously with the
apparatus and centred on the weighing points on the levers e e.
3rd. The levers and y as applied to take up the forward weight and convey it
back on to a weighing centre.
Dated this Twenty-fourth day of May 1893.
WALTER YATES.