Improvements in and in Connection with Automatic Weighing Machines for Weighing Grain, Seeds, Granular and Pulverous Substances.
Year: 1886

page_text: Date of Application, 29th Apr., 1886.
Complete Left, 29th Jan., 1887.
Complete Accepted, 1st Mar., 1887.
Improvements in and in Connection with Automatic Weighing
Machines for Weighing Grain, Seeds, Granular and Pulverous
Substances.
We, HENRY POOLEY, of Albion Foundry, Liverpool, in the County of Lancaster,
Engineer, and JOHN PARKINSON, of 42, Bulwer Street, Breck Road, Liverpool,
aforesaid, Foreman, do hereby declare the nature of our said invention to be as
follows:-
Our Invention relates to certain improvements hereinafter set forth in and in con-
nection with that class of weighing machines which are employed for automatically
weighing grain, seeds, and granular and pulverous substances, and which at the same
time register the quantities weighed.
In the carrying out of our Invention we use the following parts common to
machines of this type, namely an equal armed lever made on the principal of a scale
beam, having at one end a receptacle or hopper for containing the material to be
weighed and at the other end a weight, scale. We also use a shoot for feeding the
material to be weighed into the weighing receptacle, and a register, or counter.
According to our Invention there are provided in connection with the above
enumerated parts the hereinafter described special parts which in themselves and in
their combination with the above enumerated parts constitute the elements of our
Invention, namely, we provide:
A mechanism for discharging the weighing receptacle when filled.
A discharging apparatus controlled and regulated by the action of the weigh-beam
itself.
A peculiar form of catch and construction and arrangement of operating parts for
locking and retaining the discharging door of the weighing receptacle locked in
position.
An arrangement whereby a continuous stream is maintained into the weighing
receptacle and for the interim disposal of the stream of material during the time the
weighing receptacle is discharging.

page_text: A reducer so arranged that the supply of material flowing into the weighing
receptacle shall be so gradually reduced that only the exact amount of material to
complete the weighing can be received by the weighing receptacle. This contrivance
altogether dispenses with the necessary provision contained in other automatic
weighing machines of this class for compensating for the column of grain held in
suspension after weight has been taken.
A mechanism which regulates the feed of grain or other substance to the weighing
machine.
The complete apparatus and the special parts which constitute our Invention may
be described as follows.
An equal armed beam, the fulcra or middle knife edges of which are carried by
columns or framework, has suspended or otherwise attached to one of its ends a
receptacle or hopper for containing the grain or other substance to be weighed and at
the other end a specially formed scale to receive the weights. On one side of the
columns or frame there is a bracket, which serves to sustain a hammer fixed vertically
by preference, and resting on knife edges or other fixed bearings and so positioned as
to prevent its falling over until the actual load is weighed. The hammer may be
counterpoised to produce this result. The position of the hammer is adjustable on its
vertical spindle which is pivotted at its foot upon a knife edge. The vertical spindle
carries a right angled projecting arm which limits the action of the hammer just
sufficiently to knock off a catch which retains the door of the weighing receptacle in a
closed position. The action of the hammer is limited by a set screw or equivalent
device the hammer may be placed on the beam or other equivalent position. The
catch consists of a lever of the first order which is fulcrumed at one side near the
bottom of the weighing receptacle. The short arm of the lever is provided with a jaw
which catches the underside of the door of the weighing receptacle which is provided
with a rounded nose projection and with a balance weight so that the door when
closing, automatically engages with the jaw of the catch lever. The long arm of the
catch lever is carried up the side of the receptacle and passes through a slot in a
bracket, the bracket holding the lever in position and the slot providing for its stroke.
Passing horizontally along the top of the same side of the weighing receptacle as the
catch lever there is a rod adjustably connected at one end to the long arm of the catch
lever. The other end of this rod has a right angled or equivalent projection against
which the hammer strikes or presses and thus communicates its action to the catch
lever and thereby releases the discharging door of the weighing receptacle. On the
top, or some other convenient part of the hammer there is a slide having an inclined
face and a corresponding slide is fixed on the weighing beam. These slides are
positioned so as to touch cach other; the slide fixed to the weighing beam upon its
descent moves down the inclined face of the slide upon the hammer until the poise of
the hammer is overcome when the hammer falls and strikes the projecting piece or
tongue on the connecting rod. This motion actuates the catch lever and releases the
discharging door of the weighing receptacle which opens and allows its contents to
discharge. As soon as the weighing receptacle is emptied the weighing beam ascends
and the hammer is returned to its normal position by the action of an adjustable armı
which is fixed on and projects from the weighing beam for this purpose. This pro-
jecting arm has a double function, namely, when in its normal position it serves as a
foot lock to the hammer and on the upward stroke or ascent of the weighing beam
returns the hammer to its poised, or normal position by coming in contact with a
projection on the foot of the hammer, which projection also acts as the foot lock. The
catch lever being thus allowed to resume its normal position by the raising of the
hammer, the discharge. door which is closed by its counterpoise automatically
reengages itself with the jaw of the catch lever and is thereby again locked in
*position.
Over the mouth of the weighing receptacle there is mounted a basket, or scoop
shaped receiver which we term a "catch grain." This "catch grain" is mounted and
is free to turn on trunnions and is connected by a rod and lever with the discharging
door of the weighing receptacle. As the weighing receptacle discharges its load the

page_text: falling of the door of the receptacle immediately turns up the "catch grain" which
then receives the grain or other material from the feeding shoot, which would other-
wise flow into the weighing receptacle. When the weighing receptacle is emptied its
door closes and is held closed by the catch lever and the act of closing the door tilis
up the "catch grain" which then empties its contents into the weighing receptacle.
The "catch grain" is so mounted on the weighing receptacle and under the feeding
shoot that when the stream of grain or other material is flowing from the feeding
shoot into the weighing receptacle it passes over the "catch grain" and is never in
contact with the "catch grain."
As an alternative method of effecting the same object as the "catch grain" wo use
a cut off valve having a weighted lever attached to it. This cut off valve is closed by
the action of a rod connected to a lever arm on the discharging door of the weighing
receptacle and is opened by the action of the weighted lever.
In order to ensure perfect accuracy in weighing, the counter-balance or weight
scale of the weighing beam is provided with a reducer, consisting of springs and
chains, or springs, or chains only, the effect of which is to allow the weighing beam
to descend gradually and easily so as to gradually allow a weighted valve to close,
which valve is provided on the feeding shoot and is directly controlled by the motion.
of the weighing beam, by an arm therefrom which recedes as the beam descends.
The result is that when the weighing beam is in equilibrium, which is shown by a
pointer, and therefore when the weighing receptacle contains its right load the feed
has been gradually reduced to a minimum and the least addition causes the scale to
turn and the hopper to discharge its contents.
By our Invention the compensation which is so objectionable à feature in other
automatic scales is entirely overcome. By disconnecting the cut off valve and the
hammer the scale becomes an ordinary equal armed balance and may be used to test
the accuracy of its own weighing.
The action of the weighing beam in weighing the load is independent of and
entirely freed from the frictional effects of the various motions which control the cut
off valve, hammer, and discharge: The accuracy therefore is not effected by the
various motions hereinbefore described, all parts being returned to their functional
position by the upward movement of the weighing beam after the load has been
weighed and discharged.

page_text: COMPLETE SPECIFICATION.
.
Improvements in and in Connection with Automatic Weighing
Machines for Weighing Grain, Seeds, Granular and Pulverous
Substances,
We, HENRY POOLEY, of Albion Foundry, Liverpool, in the County of Lancaster,
Engineer and JOHN PARKINSON, of 42 Bulwer Street, Breck Road, Liverpool, afore-
said, Foreman, do hereby declare the nature of our said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by the
following statement:-
Our Invention relates to that class of weighing machines which are employed for
automatically weighing grain, seeds and granular and pulverous substances and which
at the same time register the quantities weighed.
In the carrying out of our Invention we use the following parts common to machines
of this type, namely a lever preferably an equal armed lever made on the principle of a
scale beam, having at one end a receptacle, or hopper for containing the material to
he weighed and at the other end a weight scale. We also use a shoot for feeding the
material to be weighed into the weighing receptacle and a register or counter.
According to our Invention there exists:-
A mechanism for operating the discharging door of the weighing receptacle
when filled.
A peculiar form of catch and construction and arrangement of operating parts for
locking and retaining the discharging door of the weighing receptacle locked in
position.
An arrangement whereby a continuous stream of material flows into the weighing
receptacle and for the disposal of the stream of material during the time the weighing
receptacle is discharging.
A "reducer" so arranged that the supply of material flowing into the weighing
receptacle shall be so gradually reduced that only the exact amount of material to
complete the weighing can be received by the weighing receptacle. This contrivance
altogether dispenses with the necessary provision contained in other automatic
weighing machines of this class for compensating-for the column of grain held in
suspension after weight has been taken.
A mechanism which regulates the feed of grain, or other substance to the weighing
machine.
The methods of operating and construction of parts of an apparatus according to our
Invention are as follows.
To the end of an equal armed beam is suspended, or otherwise attached a receptacle
or hopper for containing the grain, or other substance to be weighed and at the other
end a specially formed scale to receive the weights. On one side of the apparatus we
provide a hammer fixed vertically by preference and resting on knife edges, or other
fixed bearings and placed in such a position as to prevent its falling over until the

page_text: actual load is weighed. The hammer may be counterpoised to produce this result. The
action of the hammer is limited and is just sufficient to disengage a catch which
retains the door of the weighing receptacle in a closed position. The discharging
door catch consists of a lever of the first order which is fulcrumed at one side near the
bottom of the weighing receptacle. The short arm of the lever is provided with a jaw
which catches the underside of the door of the weighing receptacle which is provided
with a rounded nose projection and with a balance weight so that the door when
closing automatically engages with the jaw of the catch lever. The catch lever rod
has a projection against which the hammer strikes, or presses and communicates its
action to the catch lever and releases the discharging door of the weighing receptacle.
On the hammer there is a slide and a corresponding slide is fixed on the weighing
beam. These slides are so placed as to touch each other; the slide fixed to the
weighing beam upon its descent moves down the hammer until its poise is overcome
when it falls and strikes the projecting piece, or tongue on the connecting rod. This
motion actuates the catch lever and releases the discharging door of the weighing
receptacle which opens and allows its contents to discharge. As soon as the weighing
receptacle is emptied the weighing beam ascends and the hammer is returned to its
normal position by the action of an arm which is fixed on and projects from. the
weighing beam for this purpose. This projecting arm on the upward stroke or ascent
of the weighing beam returns the hammer to its poised, or normal position by coming
in contact with a projection on the foot of the hammer. The catch lever being thus
allowed to resume its normal position by the raising of the hammer, the discharge door
which is closed by its counterpoise automatically re-engages itself with the jaw of the
catch lever and is thereby again locked in position.
Over the mouth of the weighing receptacle there is mounted a basket, or scoop
receiver which we term a "catch grain." This "catch grain" is free to turn and is
connected with the discharging door of the weighing receptacle. As the weighing
receptacle discharges its load the falling of the door of the receptacle immediately turns
up the "catch grain" which then receives the grain, or other material from the feeding
shoot, which would otherwise flow into the weighing receptacle. When the weighing
receptacle is emptied its door closes and is held closed by the catch lever and the act
of closing the door tilts the "catch grain" which then empties its contents into the
weighing receptacle. The "catch grain" may be so mounted on the weighing
receptacle and under the feeding shoot that when the stream of grain, or other material
is flowing from the feeding shoot into the weighing receptacle it passes over the
"catch grain" and is never in contact with the "catch grain."
As an alternative method of effecting the same object as the "catch grain" we use
a cut off valve having a weighted lever attached to it. This cut off valve is closed by
the action of a rod connected to a lever arm on the discharging door of the weighing
receptacle and is opened by the action of the weighted lever.
In order to ensure perfect accuracy in weighing, the counterbalance, or weight scale
of the weighing beam is provided with a reducer, consisting of springs and chains, or
springs, or chains only or weights the effect of which is to allow the weighing bean to
descend gradually and easily so as to gradually cut off the supply of material by
allowing a weighted valve to close, which valve is provided on the feeding shoot and is
directly controlled by the motion of the weighing beam, as the beam descends. The
result is that when the weighing beam is in equilibrium which is shown by a pointer,
and when the weighing receptacle contains its right load the feed has been gradually
reduced to a minimum and the least addition causes the scale to turn and the hopper
to discharge its contents.
By our Invention the compensation which is so objectionable a feature in other
automatic scales is entirely overcome. By disconnecting the cut off valve and the
hammer the scale becomes an ordinary equal armed balance and may be used to test
the accuracy of its own weighing as hereafter set forth..
A weighing machine constructed according to our Invention is illustrated in the
accompanying Drawings, which together with this description thereof are sufficient to
enable others skilled in the art to which it belongs to put the same into practice.

page_text: In the Drawings
Figure 1 is a side elevation of a machine constructed according to this Invention.
Figure 2 is an elevation of the reverse side of the machine shown at Figure 1.
Figure 3 is a front end view of Figure 1.
Figure 4 illustrates the discharging hammer mechanism in detail.
Figure 5 is a plan of Figure 1.
Figure 6 shows a modified construction of the discharging hammer mechanism.
Figure 7 is a side elevation of an arrangement of the cut off mechanism.
Figure 8 is a front end view of Figure 7.
Figure 9 is a plan of Figure 7.
Figures 10 and 11 are respectively plan and elevation of a modified form of weight
reducing mechanism shown in Figure 1.
Figures 12 and 13 are respectively plan and elevation of a modified form of the
weight, reducing mechanism shown in Figures 10 and 11.
A is an equal armed beam, the fulera A', or middle knife edges of which are carried
by columns, or framework B. One end of the beam A has suspended from it by the
adjustable links A2 a receptacle, or. hopper C for containing the grain, or other
substance to be weighed. From the other end of the beam A there is suspended by
the adjustable link A³ a specially formed scale; or weight pan D hereafter described to
receive the weights. On one side of one of the columns B there is provided a
bracket B which serves to sustain the hammer d fixed nearly, vertically by preference
as shown at Figures 4 and 6 and resting on a bearing d' and so placed as to prevent
the hammer falling over until the actual load is weighed. The position of the
hammer d is fixed as in Figures 1 and 4 or adjustable as in Figure 6, on its vertical
spindle d which is pivotted at its foot upon the knife edges d: The vertical spindle d²,
Figure 6 carries a projecting arm d³ which limits the action of the hammer d just
sufficiently to knock off the catch a which retains the door of the weighing
receptacle C in a closed position. The action of the hammer din Figure 6 is limited
by a set screw 6 and a stop on the column B. The catch a consists of a lever of the
first order, which is fulcrumed at a' on one side of and near the bottom of the weighing
receptacle C. The short arm of the catch lever a consists of two jaws a² one on either
side of the receptacle C which catch the underside of the door of the weighing
receptacle C which is provided with rounded nose projections C and with a balance
weight (3 so that the door C₁ when closing automatically engages with the jaws a² of
the catch lever a. The long arm of the catch lever a is carried up the side of the
receptacle C and passes through a slot in a bracket as at the top of the receptacle C
the bracket a holding the long arm of the catch a in position and the slot providing
for the stroke of the lever à. Passing horizontally along the top of the same side of
the weighing receptacle C as the catch lever a there is a rod a adjustably connected
at one end to the long arm of the catch lever a. The other end of this rod a' has a
projection as against which a projection a on the hammer d strikes, or presses and
thus communicates its action to the catch lever a and thereby releases the discharging
door C from the holding jaws a² of the lever a. On the top of the spindle d' of the
hammer (see Figure 6) and upon the hammer in Figures 1 and 4 there is a slide d'
having an inclined face and a corresponding slide e is fixed on the weighing beam A.
These slides d and e are placed so as to touch each other in the normal condition of
the machine. The slide e fixed to the weighing beam A and upon its descent moves
down the inclined face of the slide upon the hammer until the poise of the hammer d
is overcome when the hammer d falls over and the projection a strikes the projecting
piece, or tongue a on the connecting rod at. This motion actuates the catch lever a
and releases the discharging door of the weighing receptacle C which opens and
allows its contents to discharge. As soon as the weighing receptacle C is emptied
the weighing beam A ascends and the hammer d is returned to its normal position
by the action of the arm f which is fixed on and projects from the weighing beam A
for this purpose.
This projecting arm on the upward stroke or ascent of the
weighing, beam A returns the hammer d to its normal or poised position by coming in
contact with the projection . The catch lever a is thus allowed to resume its normal

page_text: position by the raising of the hammer d. The discharge door is closed by its
counterpoise and the rounded nose projections C automatically re-engage with the
jaws of the catch lever a and the door is thereby again locked in position.
Over the mouth of the weighing receptacle A there is a basket, or "catch grain" g.
This basket receiver, or "catch grain" is carried by trunnions working in the
brackets attached to the sides of the receptacle C so that it is free to turn on the
trunnions and is connected by a lever g³ and a rod with the discharging door C¹
of the weighing receptacle C so that as the weighing receptacle C discharges its load
the falling of the door C) of the receptacle C through the rod and the lever ³
immediately turns up the "catch grain" g as shown in dotted lines in Figure 2 so
that the "catch grain" then receives the grain, or other material flowing from the
feeding shoot h which would otherwise flow into the weighing receptacle C. When
the weighing receptacle C has discharged its contents its door C closes by means of
its counterpoise and is held closed by means of the jaws a² of the catch lever a and
the act of the closing of the door C tilts the "catch grain" into the position shown
in Figure 1, so that the "catch grain" then empties its contents into the weighing
receptacle C. The "catch grain" g is so mounted on the weighing receptacle C and
under the feeding shoot that when the stream of grain, or other material is flowing
from the feeding shoot into the weighing receptacle C it strikes the "catch grain"
and falls into the receptacle.
As an alternative method of effecting the same object as the "catch grain" g we
use a cut off valve g over the mouth of the feeding shoot having a weighted lever g
attached to it as shown in Figures 7 8 and 9.
This cut off valve g is closed by the action of the rod ' connected to the lever
arm Con the discharging door of the weighing receptacle and the valve g is
opened by the action of the weighted lever 3. The action of this alternate arrange-
ment is -When the weighing receptacle has received its load and the discharge
door Copens, this action through the lever C³ rod and weighted lever g closes
the valve and thus shuts off the supply of grain to the receptacle C through the
shoot . The valve in this case operates as hereafter set forth with reference to
Figures 1 to 6.
In order to ensure perfect accuracy in weighing, the weight scale D of the weighing
beam A is provided with a weighing mechanism consisting of springs and chains, or
springs, or chains only, or weights by which the weight on the beam is reduced. In
Figure 1 of the Drawings a spring mechanism is shown. This consists of a means
whereby we obtain an automatic compensator for the column of grain, or other
material which necessarily would fall into the weighing hopper after true weight las
been obtained. The apparatus is arranged as follows. A base preferably of brass
is attached to the base plate underneath the weight plate of the machine, or counter-
balance D as shown in the Drawings which carries the main weight. This casting
has a screw thread turned upon it, and carries a nut upon which is placed a spring i
which presses against the underside of the counterbalance or weight plate. In order
to prevent the spring falling off, or being displaced it is covered by a plate provided
with rods passing loosely through holes in the nut and having screw threads
turned upon them which carry nuts to prevent them coming out. Thus, when the
spring is compressed, the plate with the rods is free to move downwards, but
when the weight plate moves up the spring can only follow it until checked by the
nuts on the rods.
3
The nut carrying the spring is screwed up to its proper position under the weight
plate and then followed up by a lock nut which keeps it securely in position and
prevents it being tampered with.
As an alternative instead of closing the discharge door C¹ by means of a weight Ca
carried by a projecting arm, or arms from the door itself, it may be closed from the
catch grain basket by a lever and weight S.
23
Instead of the apparatus before described for dealing with the grain, or other material
which passes into the hopper after true weight has been ascertained, we employ for
the same purpose a lever (see Figures 10 and 11) under the load, or weight scale D

page_text: and attached to it by the links . On the long arm of the lever is a weight i capable
of being moved backwards, or forwards as the surplus quantity of grain, or other
material is less, or more.
The same object may be attained by allowing the load scale to rest on two, or more
levers as shown in Figures 12 and 13 of the Drawings, or the load scale may rest on
one, or more of such levers at its centre, weight being placed on the lever scale pans
as the surplus quantity of grain or other material is less, or more.
The same object may also be obtained by using a chain, or chains, the chain, or
chains being attached, or connected to the weight scale in any suitable way. The
weight of the chain is taken up by the scale-link by link until the beam is in equipoise
when the correct weight is obtained.
The effect of this mechanism and construction of the weight scale D is to allow the
weighing beam A to descend gradually and easily when weighing, so as to gradually
allow a weighted valve which is provided on the mouth of the feeding shoot to
close. The said valve being directly controlled by the motion of the weighing
beam A. by means of an arm 1 thereon, which arm recedes as the weighing beam A
descends, the result is that when the weighing beam A is in equilibrium and therefore
when the weighing receptacle C contains its right load the receding of the arm 7 to
the extent given.by the spring i on the weight scale D reduces the feed through the
shoot to a minimum and the least addition causes the scale to turn and the
receptacle C to discharge its contents.
In the feeding spout is a groove m cast, or machined in, into which the edge of
the valve falls in order to provide a cushion for the better cut off of grain, or other
material. The cut off door, or valve k has a weight which is sufficient to close the
valve when unsupported. Each side of the valve is cut away and provided with
apertures so as to allow for the final feed making up of the exact weight of material
and turning the scale. A projection is attached to the valve and is connected to
the arm fixed upon the weigh beam A by a link m¹. The apertures just described
are provided with slides n by which they may be more, or less covered, or exposed as
may be required.
The scale may be made to check, or test its own weighings without the aid of a
separate machine, or scale beam, by the following arrangement. On the main
hopper is placed a small tumbling catch which when in the first position shown
in Figure 1 of the Drawings locks the releasing catch lever (a) and prevents the
discharge door C¹ opening. Having thus locked the discharge door and having
nearly filled the main hopper, the supply of grain, or other material is momentarily
checked and the right hand slide on the cut off door moved to the position shown
in dotted lines on the Drawing; thus closing one of the apertures with which the cut
off door is provided for the purpose of giving the final feed necessary to turn the scale
when the cut off door is closed. The supply is then turned on again and the grain,
or other material trickles slowly through the remaining aperture until the beam is
level and the weights on the scale pan balanced. The instant this takes place, the
left hand slide a is closed. This slide is provided with a projection o which when it
closes fits into a recess on the feeding spout and thus completely locks the feeding
door and prevents the passage of any of the material to be weighed to the main
hopper.
น
E is a counter, or register which may be of any approved type. It is mounted on
the receptacle C and worked hy the lever m² which is operated by a pin /² on the
rod of the door C¹.
By this Invention the compensation which is so objectionable a feature in other
automatic scales is entirely overcome. By disconnecting the cut off valve and the
hammer the scale becomes an ordinary equal armed balance and may be used to test
the accuracy of its own weighing as above described.
The operation of the machine is as follows: Say the weight of material to be
weighed is 100 lbs and the weight of the materials of which the balancing portion
of the apparatus is made balance one another on each side as is the case with that set
forth with reference to Figures 1 to 6 of the Drawings. A dead weight of 100 lbs is

page_text: placed on the weight scale and the spring i say exerts a total pressure of 5 lbs. The
exertion due to the spring will be continued against that of the deadweight until the
lever, or beam A is in equipoise, or level when the scale pan, or weight pan rises off
it, and the full weight of 100 lbs is exerted.
When the weighing receptacle is empty and the door shut, the positions of the
parts are as shown in the Drawings namely the valve is open and the "catch
grain" inclined in a downward direction. Upon the material to be weighed being
turned in, it flows through the shoot and into the receptacle. When the weight in
the receptacle has reached the 100lbs minus the upward exerted weight 5 lbs of the
spring namely 95lbs, the beam, or lever will be gradually brought into equipoise.
By this action of coming into equipoise the piece e has brought up the hammer d into
about equipoise and the standard being on the beam A will have fallen and so
allowed the valve & to have fallen and cut off the supply to the receptacle C except
the streams which flow through the apertures in the valve. The amount of the
streams will have to be about equal to the weight exerted by the spring i. So soon
as the weight of material fallen into the receptacle C has reached the required
quantity it causes the beam to fall and in so doing through the construction and
arrangement of the hammer and the piece e causes the weight d to fall forward as set
forth and disengage the catch a. The weight of material in the receptacle then forces.
the door open by which action the "catch grain" is tipped upward as shown and
described and the material still flowing from the shoot through the apertures in the
valve & is thus caught and prevented from flowing into the receptacle when once the
full weight therein has been reached. As soon as the receptacle is empty all the parts
assume their former positions and the grain caught in the "catch grain" g during
the time of discharging of the receptacle is the first to be thrown into it. In this way
the automatic weighing and the actions above set forth are repeated.
The action of the weighing beam in weighing the load is independent of and entirely
freed from the frictional effects of the various motions which control the cut off valve,
hammer, and discharge. The accuracy therefore is not effected by the various motions
hereinbefore described, all parts being returned to their functional position by the
upward movement of the weighing beam, after the load has been weighed and
discharged.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed we declare that what we claim is :-
First. In weighing machines of the type specified preventing the material being
weighed from falling into the weighing receptacle after the weighing is completed in
the manner herein set forth which consists in catching, or cutting off such material
by a catch scoop, or by a valve (such as or their equivalents) operating as
described.
Second. In weighing machines of the type specified the use of a device such as a
spring, or weight acting in combination with the weight pan, or scale of the machine
in such a manner that the full weight is not exerted against the weighing receptacle
until the beam is substantially in equipoise substantially as and for the purposes
set forth.
Third. Effecting the discharge of weighing machines of the type herein specified
by a weight, or hammer mounted upon a fixed portion on or in connection with the
machine and operated through the falling of the beam or other equivalent moving
part, the said hammer, or weight being connected to and operating the discharging
mechanism of the weighing machine by means and in the manner such as specified,
or any mere modification thereof.
Fourth. Effecting the stoppage of the main supply of material to weighing
machines of the type herein described by a valve (such as k) operated by the action
of the beam coming into equipoise as described, such equipoise. being obtained previous
to the full weight of material being supplied to the weighing receptacle by a spring,
or weight device acting as specified in Claim Second.
Fifth. The combination in a weighing machine of a valve (such as k) and a cut off
B

page_text: valve, or a scoop (such as g) the valve or scoop y being operated from the discharging
door of the weighing receptacle and the valve being operated by the falling of the
weighing beam as set forth.
Sixth. The feed shoot valve and the cut off valve arranged, constructed and
operating in combination as set forth particularly with reference to Figures 7, 8 and 9
of the Drawings.
Seventh. The valve and catch scoop arranged, constructed and operating in
combination substantially as set forth with reference to Figures 1 to 6 of the
Drawings.
Eighth. A feeding shoot of a weighing machine of the type herein described
provided with a groove (m) into which the edge of the cut off valve falls in shutting
off the supply to the weighing receptacle as and for the purposes specified.
Ninth. The combination with the cut off valves of weighing machines of the type
herein described of adjustable shutters, or slides such as (n) or their equivalents
whereby the final feed of material to the weighing receptacle can be varied as
set forth.
Tenth. A mechanism for unlocking the discharging door (C) of a weighing
machine of the type herein described operating and arranged substantially as set
forth with reference to the Drawings.
Eleventh. The discharging hammer mechanisms constructed particularly as set
forth with reference to Figure 4 of the Drawings and Figure 6 of the Drawings.
Twelfth. The weighing machine herein set forth particularly, with reference to
Figures 1. 2. 3. 4 and 5 of the Drawings constructed and operating as described.
Thirteenth. The peculiar formation of catch a and engaging piece (³ arranged and
operating substantially as set forth.
Fourteenth. The scale pan weight mechanism arranged constructed and operating
substantially as set forth with reference to Figures 10 and 11 of the Drawings for the
purposes specified.
Fifteenth. The scale pan weight mechanism arranged constructed and operating
substantially as set forth with reference to Figures 12 and 13 of the Drawings for
the purposes set forth.
Sixteenth. The scale pan weight mechanism arranged constructed and operating
substantially as set forth with reference to Figure 1 of the Drawings.