Improvements in Automatic Weighing Apparatus.
Year: 1899

page_text: Date of Application, 25th Aug., 1899
Complete Specification Left, 25th May, 1900-Accepted, 7th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in Automatic Weighing Apparatus.
I, MICHAEL EDUARD REISERT, of Hennef-on-the-Sieg, in the Empire of Ger-
many, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to improvements in automatic weighing apparatus
in which the material to be weighed passes from a hopper into a receptacle,
which, when properly filled, empties itself automatically in a well known manner.
In such weighing apparatus the material is allowed to pass into the said re-
ceptacle until the d. sired weight is obtained and the supply is then cut off by
a gate or gates beneath the supply funnel. The object of the improvements is
to relieve the scale from the action of the vis viva of the material entering the
receptacle in order to secure the greatest correctness in weighing and an exact
working of the apparatus when the scale beam equipoises.
The mechanisms and parts of weighing apparatus of the class above referred
to are well known and constructed, arranged and operated substantially as set
forth, for instance, in the British Patent No. 7554 of 1886 and No. 19887 of 1894.
In the latter Patent there is also shown and described a means for relieving the
scale from the action of the vis vira of the material entering the receptacle, which
means consists of a stop-device (revoluble hook) adapted to engage, after the
elease of the cut-off gate, with the hanger, and to interrupt thereby the oscilla-
tion of the scale; the said stop-device being again disengaged from the hanger at
the moment the said cut-off gate shuts off entirely the supply of material. But in this
arrangement it may occur that the stop-device will be already again disengaged
before the hanger has come into engagement with the stop device, that is to
say, before the scale has descended sufficiently and come at rest. This possibility
is obviated by the present invention in that the release of the stop-device is
retarded by means of a body or the like, which at, or after, the closure of the
cut-off gate moves itself automatically in consequence of its gravity and effects
the dis-engaging of the stop-device by this movement; the arrangement and the
direction of motion of this body being such that its movement or oscillation is
a sufficiently slow one.
In carrying this invention into practice, I provide in automatic weighing
apparatus of the class above referred to, a suitable stop-device which preferably
consists of a bent lever having its fulcrum on a pivot or projection of the frame;
one arm of this bent lever is connected with the reducing flap of the scale by means
of a rod which is pivoted to the said flap and has at its lower extremity a slot
The other arm of
or eye into which engages a pin of the said bent lever arm.
the bent lever is provided with a shoulder against or upon which the hanger of
the scale will strike with a pin or the like in order to bring the descending
hanger or receptacle to rest, as will be explained hereinafter. The arrangement
of the bent lever is such that its centre of gravity is on that side of its pivot at
which the connecting rod is arranged, and is brought, by applying a suitable

page_text: counterweight as close as possible to the said pivot so that the bent lever
possesses only a small turning momentumi.
Supposing the working parts of the weighing apparatus are in the position in
which the material enters through the hopper into the receptacle. After nearly
sufficient material has entered into the receptacle to equipoise the balance, the
said receptacle descends until a weight, pivoted to the frame and acting upon an
auxiliary scale beam strikes against a stop pin provided for this purpose; during
this short downward motion a projection of the receptacle has released an arm
connected with the flap, thus allowing the said arm as well as the flap and the
rod connecting the flap with the bent lever to drop into a position in which the
said flap bars the lower supply-opening of the hopper up to the slots in the said
flap.
As by the dropping of the rod the bent lever is not influenced but it is only freed
and allowed to slowly turn about its pivot the descending receptacle is enabled
to strike or set itself by means of a suitable pin on the hanger thereof engaging
the shoulder of the second arm of the bent lever before this latter is turned
entirely out of the path of the said hanger or its pin. By thus striking upon the
bent lever the balance or scale beam comes to rest.
Through the flap now enters only so much of the material into the receptacle
as is necessary to exactly equipcise the scale bean and to cause its motion again,
since the hanger is no longer barred by the bent lever or stop device which in
the mean time has turned out off the path of the said hanger. At this further
oscillation of the scale beam a pin of a hand attached to the scale beam pushes
against an arm of a toggle and thereby causes the said toggle to bend, whereby
the cut-off gate is closed and a catch device arresting the receptacle disengaged
in a well known manner, thus permitting the receptacle to tilt over and to pour
out its contents.
When the receptacle after being emptied returns into its upright position the
Hlap and gate will be opened again by means of the projection of the receptacle
and the arm of the flap in a well known manner. As the flap is in connection
with the bent lever by the connecting rod the latter will also be returned into
its original position and held therein by the said rod until this rod descends by
the next closure of the flap.
Instead of connecting the bent levers or stop piece with the flap the former
may also be connected with a suitable part of the weighing apparatus or scale
proper, for instance, with the receptacle, by means of a lever or lever arrange-
ment, so that the said stop-piece is controlled or operated by the motion of the
scale and is therefore independent of the flap.
Dated this 0:41
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
i
T
signing Apparatus.
I, MICHAEL EDUARD REISERT, of Hennef-on-the-Sieg, in the Empire of Ger-
many, Manufacturer, 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:-
The present invention relates to improvements in automatic weighing apparatus

page_text: in which the material to be weighed passes from a hopper into a receptacle,
which when properly filled, empties itself automatically in a well known manner.
In such weighing apparatus the material is allowed to pass into the said re-
ceptacle until the desired weight is obtained and the supply is then cut off by
a gate or gates beneath the supply funnel. The object of the improvements is
to relieve the scale from the action of the ris rica of the material entering the
receptacle in order to secure the greatest correctness in weighing and an exact
working of the apparatus when the scale-beam equipoises.
With this end in view my invention consists of certain novel features of con-
struction and combinations of parts, as will be hereinafter fully described with
reference to the accompany drawings, in which-
Figure 1 is a side elevation of the improved weighing apparatus, of which is
shown only as much as is necessary for the clear understanding, the constituent
parts being in the position they occupy when both the slotted flap and the cut-off
gate are opened and the material is being fed into the receptacle.
Figure 2 is a similar view with the different parts in the position they occupy
just before the cut-off gate is closed.
Figure 3 is a like view showing the essential parts, just after the equilibrium
is reached, at the end of the weighing period, the receptacle being tilted for
delivering its contents.
Similar letters refer to similar parts throughout the several views.
A is the scale-beam; B the receptacle for receiving the material to be weighed;
C the weight seat; D the hopper; F the slotted flap for reducing the supply of
the material; G the cut-off gate for entirely stopping the supply of material;
b the hanger in which the said receptacle is supported by means of trunnions b'
the hanger itself being suspended from the scale beam A in well known manner;
for the sake of clearness, however, this attachment or suspension is not illustrated
in the drawings but the upper end of the hanger shown as broken away; H is
a weight pivoted to the frame A' at h and acting upon a lever or auxiliary scale-
beam J; R is an arm actuated by a projection 9 of the receptacle and adapted to
open the flap F and gate G; the flap F is provided with slots f¹ extending from
the front edge thereof to the dotted line shown in the drawings, serves as a re-
ducing valve, and is well known in machines of this class and requires no further
illustration, while the gate G or cut-off valve is for entirely stopping the supply
of material to the hopper; the arm R as well as the flap and gate are pivoted on
the shaft r. The cut-off gate G is connected with an arm W, and this latter with
a toggle L M P which is straightened by the raising gate G and held upright
by means of a counter-weight p resting upon a stop m. Z is an arm or hand
attached to the scale beam A and adapted to cause the toggle to bend
toward the left as soon as a pin a of the arm Z strikes against the arm u
of the said toggle. O is a hook pivoted to the hanger band engaging a
lug k of the receptacle thus arresting the latter in the upright position. The
hook O is disengaged from the lug by means of a rail N pivotally suspended
from an arm Wi rigidly connected with the gate G or the arm W, respectively.
Also any other suitable catching and disengaging device may be used for the
purpose of arresting the receptacle.
The above described mechanisms and parts of the weighing apparatus are
well known, and constructed, arranged and operating substantially as set forth,
for instance in the Specifications of the British Patents No. 7554 A.D. 1886 and
No. 19887 A.D. 1894.
In the latter specification there is also shown and described a means for relieving
the scale from the action of the vis viva of the material entering the receptacle,
which means consists of a stop-device (revoluble hook) adapted to engage, after
the release of the cut-off gate, with the hanger, and to interrupt thereby the
oscillation of the scale; the said stop-device being again disengaged from the
hanger at the moment the said cut-off gate shuts up entirely the supply of
material. But in this arrangement it may occur that the stop-device will be

page_text: already disengaged again before the hanger has come in engagement with the
stop device, that is to say, still before the scale has descended sufficiently and
come at rest. This possibility shall be obviated by the present invention in that
the release of the stop-device is retarded by means of a body or the like, which
at, or after, the closure of the cut-off gate moves itself automatically in conse-
quence of its gravity and but effects the disengaging of the stop-device by this
movement; the arrangement and the direction of motion of this body being
such that its movement or oscillation is a sufficiently slow one.
In carrying this invention into practice I provide in automatic weighing ap-
paratus of the class above referred to a suitable stop-device which preferably
consists of a bent lever E having its fulcrum on a pivot or projection of the
frame; the arme of this lever E is connected with the flap F by means of a
rod K which is pivoted to the said flap at f and has at its lower extremity a slot or
eye into which engages a pin of the arm e. The other arm is provided with
a shoulder against or upon which the hanger 6 will strike with a pin 62 or the
like carried by an arm 3, in order to bring the descending hanger or receptacle
at rest, as this will be explained later on. The arrangement of the bent lever E
being thus that its centre of gravity is at right hand side of the pivot / and is
brought, by applying a suitable counterweight 9 to the bent lever E, as close as
possible to the said pivot so that the bent lever E possesses only a small turning
momentum.
Supposing the working parts are in the position illustrated by Figure 1, in
this position the material enters through the hopper into the receptacle. After
nearly sufficient material has entered into the receptacle to equipoise the balance,
the said receptacle descends until the weight H, pivoted to the frame A¹ at hand
resting with a friction roller h¹ on the front end of the auxiliary scale beam J,
strikes against a stop h³ on said frame A' (Figure 2), the function and operation
of which are fully described in the Specification of former Letters Patent No.
7554 A.D. 1886. During this short downward motion the projection has re-
leased the lever R, thus allowing the latter as well as the flap F and the rod K
to drop into the position shown by Figure 2, in which the flap F' bars the lower
supply-opening of the hopper up to the slots in the said flap."
As by the dropping of the rod K the bent lever E is not influenced but is only
freed and allowed to slowly turn about its pivot to the right, the descending
receptacle is enabled to strike or set itself with the pin of its hanger b³ upon
the shoulder of the arm of bent lever E still before this latter is turned
entirely out of the path of the hanger or its pin b², respectively. By
this striking upon the bent lever the balance or scale beam comes to rest, as will
be clearly understood from Figure 2.
Through the flap F now enters only so much of the material into the receptacle
Bas is necessary to exactly equipoise the scale beam and to cause its motion again
since the hanger is no longer barred by the bent lever E which in the mean
time has turned out off the path of the said hanger into, or nearly into, the
position shown in Figure 3. At this further oscillation of the scale beam the
pin a of the arm Z pushes against the arm u and thereby causes the toggle L M P
to bend toward the left-hand side, whereby the cut-off gate G is closed and the
catch device O k disengaged in well known manner, thus permitting the receptacle
to tilt over and to pour out its contents, this position of parts is shown in
Figure 3.
When the receptacle B after being emptied returns into its upright position
the flap F and gate G will be opened again by means of the projection q and
arm R in well known manner. As the flap is in connection with the bent
lever E by the connecting rod K the latter will also be returned into its original
position (Figure 1) and held therein by the said rod K until this rod descends by
the next closure of the flap F.
Instead of connecting the lever or stop-piece E with the flap F the former may
also be connected with the receptacle by means of a lever or lever arrangement

page_text: c that the said stop-piece is commanded or operated by the motion of the re-
teptacle itself and therefore independent of the flap.
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
1. In a weighing apparatus, the combination with the scale pan, hopper and
valve thereon, of a weighted abutment for the scale pan arresting the motion of
the pan due to the inertia of the incoming material, partially displaced and held
so by the weight of the pan, dropped out of the way of the scale pan when re-
leased, and mechanism for returning the abutment into operative position sub-
stantially as set forth.
2. In a weighing apparatus, the combination with the scale pan, hopper and
a pair of valves thereon: of a weighted abutment for said scale pan arresting its
motion due to the inertia of the incoming material, partially displaced by the
weight of the pan and dropped out of the way of the pan when released, and a
link connected to one of said valves for positioning the abutment after emptying
the pan, substantially as set forth.
3. In a
weighing apparatus the combination with the scale pan, its hangers,
one of which is provided with a lug, the scale beam, feed hopper and feed con-
trolling appliances; of a counter-balanced bell-crank lever adapted to be engaged
by the aforesaid lug, on one of the scale pan hangers, to be partially displaced
and held so while taking up the inertia due to the incoming material, and moved
out of engagement with said lug on the return swing of the scale pan, substan-
tially as set forth.
4. In a weighing apparatus the combination with the scale pan, beam, hopper,
supply cut-off valves and a lug on an element moving with the scale pan; of a
counterbalanced bell crank, a notch on one arm thereof normally resting against
said lug, a curved face on said notch against which said lug slides to partially
displace the bell-crank, and a link attached to the other arm of said crank to
return it to normal position after having fallen out of the path of said lug, sub-
stantially as and for the purpose set forth.
Deted this 25th day of M 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.