Year: 1886

page_text: Date of Application, 22nd Nov., 1886.
Complete Left, 22nd Aug., 1887.
Complete Accepted, 27th Sept., 1887.
WILLIAM MASSY PRESTON, Vaynol Bangor N. Wales Land Agent, do hereby
declare the nature of this invention to be as follows:-
A weighing machine, the table of an ordinary description adapted for weighing
trucks, but instead of the ordinary graduated lever, it acts upon a spring balance,
opposite each graduation on the balance I intend having a compartment so arranged,
that when the weight is indicated, by certain mechanism a shot will be relieved and
allowed to drop into the same along a tube. Into my table 1 fit a second table
hinged on the inner end which is forced upwards by a balance weight until its outer
edge is about centre line of axle; this table acts on a small lever, which when the
table is up, inclines forward so as to allow the first axle of the truck to pass clear of
it. Supposing my first axle has crossed the lever, the wheels then come on the small
table and consequently press it downwards, thereby forcing the lever vertical; the
second axle then coming up presses a second joint on the lever which acts on my shot
relieving mechanism, this shot arrangement is so governed, to allow one shot to be
relieved each time my table lever is pressed forward, and by counting the shot for
each weight, the amount of weight crossed over the table for a period is known.
Dated this 20th day of November 1886.
WILLIAM MASSY PRESTON.

page_text: I WILLIAM MASSY PRESTON, Vaynol, Bangor, North Wales, Land Agent, 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-
A weighing machine, the table of an ordinary description adapted for weighing
trucks, but instead of the ordinary graduated lever, it acts upon a spring balance,
opposite each graduation on the balance I intend having a compartment so arranged,
that when the weight is indicated, by certain mechanism a shot will be relieved and
allowed to drop into the same from a tube. Into my table I fit a second table, hinged
on the inner end, which is forced upwards by a balance weight until its outer edge is
about the centre line of axle. This table acts on a small lever, which when the table
is up, inclines forward so as to allow the first axle of the truck to pass clear of it.
Supposing my first axle has crossed the lever, the wheels then come on the small
table and consequently press it downwards, thereby forcing the lever vertical ; the
second axle then coming up presses a second joint on the lever which acts on my shot
relieving mechanism. This shot arrangement is governed so as to allow one shot to
be relieved each time my table lever is pressed forward and by counting the shot for
each weight, the amount of weight crossed over the table for a period is known.
The beforegoing being the nature, object and purposes of my Invention I will now
proceed to describe more in detail how the same may be carried out into practical
effect, reference being had to the annexed two sheets of Drawings which make a part
of this Specification and to the letters and figures of reference marked thereon.
Figure 1 is a sectional elevation of the table, or platform of a weighing machine
with my Improvements applied thereto.
Figure 2 is an end view and
Figure
3 a side view of the lever device for releasing the shot.
Figure 4 is an end view of the mechanism shown at Figure 1.
Figure 5 is a side elevation, and
Figure 6 a sectional end view of the shot releasing mechanism.
Figure 7 is a plan of the spring balance and shot releasing mechanism.
Figure 8 is a plan of the platforin of the weighing machine.
Figure 9 is an elevation of the lever for connecting the weighing mechanism of the
weighing table to the spring balance.
A self registering weighing machine according to my Invention adapted for
weighing railway trucks, carts, or other wheeled vehicles consists as follows,
reference being had to the Drawings. The table, or platform A and its weighing

page_text: levers are of the construction common to platform weighing machines and such
weighing levers being well known are not shown in the Drawings. In carrying out
my Invention I provide the weighing platform A with a secondary table B. This
table B is hinged and is worked by a weigh shaft Q which weigh shaft has a counter
balance weight W connected to it by the lever D. This weight W keeps the table B
in an inclined position shown in dotted lines X2 when not weighing. On the weigh
shaft QI provide a lever E which is connected by the rod F to the pin M of a lever I,
which lever I is fulcrumed at L on a bracket 1 carried under the table A. On this
lever I there is fulcrumed at N a second lever C, the top of the lever I forming a stop
to the lever C which is kept up to such stop by a spring S. To the lower end of the
lever C there is attached on the pin K a rod G which is connected to the short arm of
a lever Q which is fulcrumed on a bracket Q. This lever Qis connected by a knuckle
joint to one end of a lever Q³ fulcrumed on a bracket Q. The other end of the lever Q³
works a lever 2 which operates the shot relieving device hereafter described. The
construction and connection of the levers I and C will be understood upon reference to
Figures 1, 2 and 3. The weighing mechanism of the table works the bell crank lever K²
by means of its hook K³. It must be understood that the hook K³ works in con-
nection with that portion of the weigh levers of an ordinary weigh bridge which com-
municates the weight of the article being weighed to the steelyard, or equivalent
weighing device. This lever K2 (see Figure 9) is provided with a balance weight W*
and is connected by the rod Z to the sliding crosshead ✗ which is connected to
the spring balance S. The sliding crosshead X is provided with a pointer X sliding
over the weight scale G2 and with a duct V for holding the shot. The crosshead X is
provided with a slide D² which has a port D³ corresponding in size to the duct V and
capable of holding one shot. Under the slide the crosshead X is provided with a port H❜
for discharging the shot on the movement of the slide D², into one of the recep-
tacles E2 hereafter described. The slide D' is worked by a lever Y carried by and
sliding on the rocking square rod A² and supported by the arms B2 from the cross-
head X. This rod A is carried by the brackets R³ and is rocked by the lever before
spoken of as being worked by the lever Q³. These parts together with the levers
Q, C and I and their connections form the shot relieving mechanism. The crosshead X
slides in a guide X³ fitted on a table H, which table H is provided with a scale of
weight and with shot receptacles E2, each receptacle corresponding in width to the
division of weight on the scale G³. Each receptacle is provided with a door F2 for
the removal of the shot.
The secondary table B before mentioned as being carried by the weigh shaft Q³ is
provided with rails corresponding in gauge with the gauge of the rails O on the
table A. At the points O2 being the junction of the rails they are jointed to allow of
the rising of the table B into the position shown by the dotted lines X² Figure 1
which is the normal condition of the table B when not weighing. The normal condi-
tion of the lever C is shown in dotted lines Y Figure 1, this being dependent upon
the position of the table B.
In operation the table B being in the position shown in dotted lines X² and the
lever being in the position shown in dotted lines Y', a truck T coming onto the
weighing machine in the direction of the arrow (see Figure 1) the axle I will clear
the top of the inclined lever and the weight of the truck will press down the table B
to the level of the table A and in pressing the table B down, the lever I is by the
rod F brought into a vertical position, the lever C taking the same position by the
action of the spring S. The weight of the truck on the tables A and B causes the
lever K2 to move forward the crosshead X against the spring balance S² so that the
pointer indicates on the scale G2 the weight of the truck, the duct V being thus
brought in line with the compartment E corresponding with the position of the
pointer on the scale G². Now upon the truck T passing off the tables A and B in
the direction of the arrow, and before the leading wheels leave the table B, the axle 2
comes in contact with the lever and causes the lever C through the rod G to work
the levers Q and Q³ which latter coming in contact with the lever Crocks the rod A²
so that the slide D² is pushed in and a shot is carried forward and allowed to pass

page_text: through the port H³ into the said receptacle E. When the truck passes off the
weighing tables the parts resume their normal position. To bring the lever back,
a small spring and stopper H³ is provided. The receiving compartments E² can be
graduated to any desired scale and by opening the doors F the shot, or equivalent
pellets can be removed and the weight which has passed over the machine can be
computed. The duct V is preferably of spiral form and is of diameter for the shots,
or equivalent pellets to pass easily through. The port D³ in the slide D² is of size a
little fuller than the shot and to hold one shot at a time and let it pass easily
into the receptacle E through the port H².
For weighing lorries, or like four wheeled vehicles, I use the same arrangement
as above described for railway trucks, but instead of the rails I provide the table
with a track wherein the wheels of the vehicle will be guided and I form the
secondary table B of small size in the track and I form the lever C as a bell
crank lever with the outer end turning up, hence it will have a vertical motion
instead of the horizontal motion previously described.
For two wheeled vehicles I form a track on one side of the table for one of the
wheels to pass along. In this track I have the end of a bell crank lever projecting
above the table and placed in such a position that the horse will have passed off the
table before the wheel comes up to the lever. The horse having passed off the table
the crosshead X will be above the compartment E2 which indicates the weight of the
cart. The wheel then coming upon the bell crank lever end will press it down and
the motion will be conveyed to the slide D2 and a shot will be deposited in the com-
partment E².
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
:-
First. In a self registering weighing machine the means herein described of regis-
tering the weight taken which means consist essentially of a mechanism by which a
shot, or its equivalent is automatically placed in a receptacle corresponding to the
weight taken as, or substantially as set forth.
Second. In a self registering weighing machine the employment of a secondary
table such as B a lever mechanism such as IC a spring, or equivalent balanced
crosshead such as X and a device such as D2 whereby a shot, or its equivalent is on
weighing delivered into a receptacle corresponding with the weight taken, as set
forth.
Third. The construction and arrangement of a self registering weighing machine
herein described consisting of the compound weighing platform A B having ordinary
weigh levers, lever K2 rod Z crosshead X spring balance S² levers I and C, rod G
levers QQ and Crod A2 slide D², table H, receptacles E weight scale G² shot
duct V operating as set forth.
Dated this 20th day of August 1887.