IMPROVEMENTS IN AUTOMATIC WEIGHING MACHINES
Year: 1884

page_text: I JOHN PETER MALVIN MILLARD of N° 28 Southampton Buildings in the
County of Middlesex, Clerk do hereby declare the nature of my Invention for
IMPROVEMENTS IN AUTOMATIC WEIGHING MACHINES and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to an improved automatic weighing machine which said
weighing machine is specially adapted for the exact weighing of grain, seeds,
granulated, pulverised and fluid matter or other materials.
According to my said present invention of an automatic weighing machine for
grain, seeds granulated, pulverised and fluid matter or other materials several
arrangements have been made which form characteristic points of difference in
comparison with the automatic weighing machines hitherto known and whereby
the chief object of constructing a weighing machine which will pass the assize
office has been continuously kept in view.
I. The opening and closing of the charging hopper is effected by means of a
novel shearlike acting slide which is operated from the weighing beam so as to
secure a rapid opening and a gradual closing of the said charging hopper. In this
respect the present simple construction shows a marked contrast to the ordinary
complicated arrangement of other automatic weighing machines for dividing the
feed into a strong or weak feed or jet.
II. The automatic weighing machine is able to play perfectly in empty condition
and when loaded so that the operation of the said machine can be verified at any
time-This is a point which must be considered of primary importance with
respect to the capacity of the weighing machine to pass the assize.
III. The measuring vessel is suspended in rectangular position to the weighing
beau which in consideration of the saving of space and the facilitating the
operating of the weighing machine is of great importance-The measuring vessel
is kept in equilibrium by the fixed axis on which the said measuring vessel
oscillates, intersecting the line of gravity the object of which, in combination with

page_text: Toug Che weighing
VIC
from the closing slide to the charging hopper as soon as the said slide is closed.
Figure 1 of the accompanying drawings in an elevation of my automatic weighing
machine.
Figure 2 is a side view.
Figure 3 a top view or plan.
Figures 4 and 5 show details of the stop or detaining device.
The figure 6a to f represent the details of the releasing of the detaining device
by means of a falling weight.
Figure 7 to d represent the releasing of the stop or detaining device by means
of a falling rod.
Figure 8 shows the releasing of the detaining mechanism or device by means of
a suitable stop.
Figures 9 and 10 show the arrangement of the rollers for the detaining device.
The present machine is an ordinary beam weighing machine with the weight
scale or dish b on the one side of the weighing beam a and the measuring or
weighing vessel c on the side of the same.
The weighing beam a has its hearings on the knife edges 8-The hands or
indicators are employed for indicating the releasement and the equilibrium of
the weighing beam.
The said weighing machine can be adjusted by means of the sliding weight and
as the said machine is capable of playing fully both in loaded and unloaded
condition the same possesses all the requirements to enable the same to pass the
assize.
The roller r sits on a jointed lever H on the weighing beam a and presses on a
second lever which is, by means of a suitable guide, in connection with the slide
or valve K of the charging hopper E.
The slide or valve K is moveably arranged in the centre of the opening of the
charging hopper. If the weighing beam is equilibriat-d the roller r will be out of
contact with the lever which by means of its weight g¹ causes a gradual closing
of the side or valve K which was up to that time open.
By altering the position of this weight the closing of the valve or slide can be
accelerated or vice versa.
If now the measuring vessel is emptied this side of the weighing beam will
rise suddenly, the roller presses suddenly on the lever h and at once entirely
opens the slide or valve K so that a heavy stream flows into the measuring or
weighing vessel c.
Before the weighing beam reaches its equilibrium the roller is placed out of
gear or contact with the lever hand the slide or valve K is gradually closed.
The hopper is also entirely cut off before the weighing beam reaches its equi-
librium, the duration of which said cutting off being adjusted according to the
time that the material for producing the equilibrium requires to reach the said
weighing vessel.
The adjustment by means of the weight g on the lever h in order to produce a
slower or more rapid closing of the charging hopper is arranged in consideration of
the variations in the specific weight of the materials to be weighed.
It is evident that the weighing machine even in loaded condition can play freely
from the moment when the roller leaves the lever h until the equilibrium or
equipoise is established when the releasing of the detaining device of the weighing
vessel comes into operation.
As however this space of time is two short to enable the play to be observed the
weighing machine can be made to play in loaded condition in order to be able to
control the ваше.

page_text: In this case the roller r on the lever H is turned round by means of the hinge
joint as mentioned above and the releasing arrangement for the detaining device
fixed, when the weighing machine can play like any ordinary beam weighing
machine.
The measuring or weighing vessel is hung on the weighing beam at right angles
to the same in the following manner-
The weighing beam a carries a rail or frame m of semi elliptical form in which
said semi elliptical rail m, the elliptical rail or frame n is freely suspended by
means of the knife edges s¹.
The said elliptical rail or frame m carries at a right angle to the rail or frame n,
a suspended or depending frame R in which the measuring or weighing vessel c is
so hung that two pins or pivots z running through the ends of the said frame R
fit or gear into the axle a¹ located at the centre of gravity of the said measuring
or weighing vessel c.
Therefore whilst the frame or rail n in the elliptical rail or frame m can play or
oscillate in parallel direction to the weighing beam a, the measuring or weighing
vessel c oscillates in rectangular direction to the said beam a when the same is
equipoised The side or walls of the said measuring or weighing vessel o form a
pentagon which said vessel is divided into two halves of like size by means of the
partition wall w.
A curved piece of angle iron e is rivetted or otherwise attached to the said
weighing vessel c at the side opposite to the weighing beam which said angle iron e
is provided with an angular stop at each end.
The forked end of the lever h¹ of the detaining device (Fig: 4 and 5) lies so on
this angle iron e that the one flange of the latter will run in the fork of the lever ht
which is moveable at x and carries a weight at its lower end-The releasement of
the detaining device is effected by forcing down the fork h¹ through a cut or recess
in the angle iron e.
The loaded weighing or measuring vessel c is now free, tips over in consequence
of the load being one sided and empties the contents out.
In order to prevent excessive friction in carrying out this operation I employ a
roller instead of the fork to the lever h¹ as is represented in Fig: 9 and 10
which said roller 1 runs on the angle iron e and catches into a bend or recess in
the same.
As soon as the roller is forced out of this bend or recess the measuring or
weighing vessel can tip over-The freeing or releasing operation can be carried out
in various ways of which three modifications are shown.
According to the modification as shown in Fig: 6 the releasement is effected by
means of a falling weight G which is arranged on a knife edge and laterally to the
lever h¹. A rod t is attached to the rail or frame m of the weighing beam a and
strikes the nose v of the weight G, disturbes the equilibrium of the same so that it
strikes into the nose or projection against the lever h¹ and forces the said lever
out of gear with the angle iron e-As soon as the weighing or measuring vessel c
has emptied itself, the weighing beam a which is now loaded only on one side,
rises suddenly and places the said measuring or weighing vessel c in position and
at the same time forces the weight G to one side The lever h which by the
tipping of the vessel c was moved to the left so as to glide along the under slide
of the angle iron e catches or gears in consequence of its counterweight into the
first cut, cavity or recess of the angle iron e and detains the vessel c at this side
and vice versa..
A second arrangement for releasing the detaining device for the weighing vessel e
is represented in Fig: 7.
In this case the lever h¹ is forced out of the angle iron e by a falling rotating
rod T. The rod T is held in its highest position by a lever h which is in
connection with the slide or valve to the charging hopper E (Fig: 7° and 7d).

page_text: As soon as the valve or slide K cuts off the feed to the weighing vessel c, the
lever h² will be withdrawn by the action of the slide or valve K from the rod T
which now falls and is compelled by the pin t¹ which moves in a suitably inclined
guide to make a rotary motion so that the nose or projection v' which previously
occupied a lateral position comes in contact with the lever h¹ and forces the same
out of the angle iron e (Fig: 7* and 7b).
The raising of the rod T is effected by the rising or return of the measuring or
weighing vessel c after the same is emptied whereby the lever h³ can glide over the
inclined stop o on the rod T and receives a further movement by means of the
spring so that the said lever 2 can detain the rod T until the next operation
ensues.
Figure 8 represents a third modification whereby the lever h¹, at the moment
when the equilibrium or equipoise is reached by the weighing beam a and with
this also the weighing vessel sinking strikes against a stop A and is thus forced out
of gear with the angle iron e.
It is evident from the arrangements and devices pertaining to my automatic
weighing machine as shown in the accompanying drawings and described in the
foregoing specification in combination with the precise action of the exceedingly
simple mechanisms employed, that the said weighing machine is extremely sensative
and able to make absolutely exact measurements it being immaterial whether
smaller or greater quantities are weighed.
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
In automatic weighing machines,
1-The shear like closing of the charging hopper which is attained by means of
the slide or valve K which said valve or slide is rapidly opened and by adjusting
the weight gl, can be more or less slowly closed by the action of the roller r
attached to the weighing beam a on the lever h substantially as described and
shown in Figures 1 and 2 of the accompanying drawings.
2-The arrangement and application of the roller which is carried by the
lever H in such manner that the said roller r can be placed out of connection with
the lever h by turning the said lever H back by means of its joint arranged for this
purpose in order to be able to let the weighing machine play fully in loaded
condition in combination with the slide or valve K for closing the charging
hopper E which said valve is operated by the action of the roller attached to the
lever H on the lever L substantially as described and shown in Figure 2 of the
accompanying drawings.
3-The method of hanging the weighing vessel c in the frame R in a position
rectangular to the weighing beam a which said frame R is hung in the frame m
resting on the knife edges s by means of the elliptical frame n and which gears by
means of its pins or pivots with the axle a¹ which intersects the line of gravity of
the weighing vessel c so that an oscillation of the weighing vessel c is permitted
substantially as described and shown in the Figures 1-3 of the accompanying
drawings.
4-The method of detaining the weighing vessel c by means of the lever h
which is moveably arranged and provided with a forked end h¹ in which said fork
the angle iron guide e attached to the weighing vessel can run (Fig: 4 & 5)
or whereby the lever h¹ is provided with a roller instead of the fork, Fig: 9-10,
substantially as described and shown in the accompanying drawings.
5 The method of releasing the detaining device for the weighing vessel c by
forcing the lever h' out of gear with the angle iron e.
a) by the weight G being forced out of its equipoise by means of the arm t on
the weighing beam a so that the weight G falls and strikes with its nose or
projection von the fork or roller of the lever substantially as described
and shown in Fig: 6 of the accompanying drawings.

page_text: b) by the nose v of the rod T which is given free by the slide or valve K of the
charging hopper E striking the lever h¹ (Fig 7).
c) by the weight of the lever h¹ striking the stop or projection A (Fig 8)
substantially as described and shown in the accompanying drawings.
6-The general arrangement and combination of the parts in my improved
automatic weighing machine substantially as described and shown in the accom-
panying drawing.
& Nazzamhan 100 A.