Improvements in Apparatus for Automatically Weighing Granular, Pulverulent, and similar Material.
Year: 1896

page_text: Date of Application, 27th Feb., 1896
Complete Specification Left, 25th Nov., 1896-Accepted, 20th Feb., 1897
Improvements in Apparatus for Automatically Weighing Granular,
Pulverulent, and similar Material.
1, WILLIAM EVANS, of Colwyn, in the County of Carnarvon, Grocer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to apparatus constructed with tilting scoops in which the
material is weighed and from which it is automatically discharged as soon as the
scoop receives the required weight or quantity of material.
It consists essentially in constructing the apparatus with an oscillating or shifting
appliance or device carrying inclined channels or shoots down which the material
falls from a hopper which is automatically shifted or oscillated as the scoop is
tilted or moved to be discharged so that the upper edge of the shoot is moved from
one side of the discharge orifice of the hopper to the other side and the lower edge
is moved clear or away from the scoop to prevent any further supply of material
thereto; with a rod or lever connected to the centre bar of the scoop to actuate
the oscillating cut off mechanism and with an appliance for regulating the weight
of the material comprising a pivoted support with projecting pin upon which the
weight is placed and which oscillates from side to side with the centre scoop bar.
In carrying out the invention a hopper is provided at the top of the machine
into which is placed the material to be weighed. Below the discharge orifice of
the hopper I place a triangular or other suitable appliance carrying two shoots or
channels one at either side or the two shoots may be connected together with their
tops together and their bases spread out any desired distance. This appliance
comprising or carrying the shoots is pivoted to oscillate with its apex immediately
below the discharge orifice of the hopper. The weighing scoops are attached to a
central pivoted bar below the shoots so that as one rises the other falls and are so
placed that the one that is up receives the material from the shoot.
The oscillating shoots are connected to a lever or weighted pivoted bar by
knife edges or their equivalents and this bar is connected by a rod or lever to
the pivoted bar of the scoops. On the fall of the scoop when filled the position
of the oscillating shoots is changed from one side to the other, the apex passes
to the other side of the discharge orifice of the hopper and receives the material
into the other shoot and the edge of the first shoot falls away from the scoop
dist harging what may remain therein into a receptacle placed below to receive it to
prevent any more of the material entering the scoop than is actually weighed.
These oscillating appliances carrying the shoots or channels serve (a) to conduct
the material to the scoop to be weighed, (b) to cut off the flow to one scoop and
divert it to the other and (c) prevent any more material entering the scoop after it
begins to discharge.
The lever which carries the oscillating appliance is provided with a counter-
balance weight at one end and pivoted at or near the centre being connected to the
lever extending from the scoop bar by a chain or spring or by a counecting rod or
their equivalents. The appliance may be pivoted on a steel rod resting on knife
edges.
To determine the weight of the material a weight is placed on a pivoted bracket
or support being connected thereto by a pin which passes through the weight to

page_text: hold it in position. The falling of the scoop oscillates the weight bracket from
one side to the other and the weight in falling is thrown at an angle to the scoop
bar greater than a right angle. The jerk of its fall prevents the rebounding motion
of the scoops when they fall to discharge.
A chain cord or spring may also be attached to the ends of the scoop bars to
prevent them falling too far or otherwise check them.
The central bar is preferably mounted upon two or more pins fitting into holes
therein instead of ou a knife edge.
Dated this 26th day of February 1900
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
Improvements in Apparatus for Automatically Weighing Granular,
Pulverulent, and similar Material.
1, WILLIAM EVANS, of Colwyn, in the County of Carnarvon, Grocer, do
hereby declare the nature of this invention and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to automatic weighing apparatus in which scoops or
receptacles are placed at the end of an oscillating bar which falls or tilts first to
one side and then to the other when they have received the desired quantity of
material.
It consists essentially in constructing the apparatus with oscillating or shifting
shoots which guide the material as it falls from a hopper and which is automatically
shifted or oscillated as the bar or lever which carries the receptacle or scoop is
tilted from one side to the other as the receptacles are filled so that the upper edge
of the shoot is moved from one side of the discharge e fice of the hopper to the
other side and the lower edge thereof is moved clear of or away from the scoop
to prevent any further supply of material thereto.
It will be fully described with reference to the accompanying drawings.
Fig. 1. Side elevation.
Fig. 2. Longitudinal section.
Fig. 3. End elevation.
Fig. 4. Perspective view of the oscillating frame or bar D with the auxiliary
shoots G attached thereto.
At the top of the machine is placed a hopper A of any ordinary construction
into which is placed the material to be weighed and from which it is fed to the
weighing apparatus.
Below the discharge orifice a of the hopper AI place two shoots B connected
together in triangular form so that the upper or receiving ends of the shoots are
merely divided by a sheet or board . The shoots 13 are balanced and pivoted on
an axle C preferably formed with a knife edge on the lower side so as to be capable
of oscillating from side to side and are placed so that the apex or top edge of the
division plate is immediately below the discharge orifice a of the hopper A.
Below the shoots B 1 place a centrally pivoted oscillating bar or frame D which
carries at each end a receiver E or scoop to receive the material to be weighed as
it is delivered from the shoots B.
In the example shown in the drawings these receivers E are detachable and are
secured in position by hooks e passing over pins d affixed to the sides of the bar or

page_text: frame D. The receivers E may be connected to the oscillating bar or frame D by
any other suitable means and may be of the form of scoops open at one end or of
any other suitable shape.
The oscillating bar or frame D is mounted upon a transverse axle bar F pivoted
at each end preferably upon knife edge or in other convenient manner to offer
but little resistance in movement.
To the bar or frame D inside the receptacle E are attached two auxiliary
shoots G which serve to direct any surplus material into a receiver H.
Upon the transverse bar or axle F upon which the bar or frame D is pivoted
1 mount a second bar K preferably with a knife edge on the upper side upon which
are placed two rolling weights L, which are free to move along the pivoted bar K
and move from the centre to one end thereof and vice versa as it is inclined first to
one side and then to the other. The weights L are hung upon the pins I connected
to the rollers L' and each of them may be changed for a heavier or lighter one as
required to weigh or determine the weight of the material.
The oscillating shoots B are connected by means of a rod M and chain N or
otherwise with the oscillating bar or frame D and are thereby caused to oscillate
with the bar or frame D, and links O engaging with a stay rod or stud o or other
suitable appliances are attached to the bar K or to the frame D to limit the
movement in either direction.
The oscillating axles C and F carrying respectively the oscillating shoots B and
oscillating bar or frame D are supported by a frame P of any convenient shape or
construction.
For weighing the rolling weights L are adjusted to the weight to which material
is to be weighed and the material allowed to flow from the orifice a of the hopper A
down one of the shoots B into the corresponding receptacle E at the end of the
bar or frame D. When the receiver is filled or has received the desired amount of
material the bar D is overbalanced and the receiver E falls. On the fall or descent
of the filled receiver the position of the oscillating shoots B is changed from one
side to the other, the apex or plate & passing to the other side of the discharge
orifice of the hopper A receiving the material into the other shoot and the lower
edge of the first shoot falls away from the upper edge of the receiver. Any
material that remains in the shoot B falls against the lower shoot G and is
discharged into the bottom receiver or receptacle H. This movement brings
the shoot at the other side dier the other receptacle E and the material immediately
falls into it and so on the weight is continuous. Each receptacle E when filled is
removed and emptied or replaced with an empty one.
It will thus be seen that the operation of the oscillating shoots B is :-
(a) To conduct the material from the hopper A to the receiver E in which it is
weighed.
(6) To cut off or stop the flow to one receiver and divert it to the other and
(c) To at once prevent any more material entering the receiver E after it is full
or has received the desired quantity.
Having now particularly described and ascertained the nature of the said inven-
tion and in what mauner the same is to be performed I declare that what I
claim is:
1. An apparatus for automatically weighing granular pulverulent or similar
material constructed with oscillating scoops placed below a hopper in combination
with an oscillating scale bearer and receivers by which the material is alternately
conducted to one receiver or the other and the flow to the receiver when full
immediately cut off or stopped substantially as described.
2. In apparatus for automatically weighing granular or other material the
combination with an oscillating weighted scale bearer or frame D carrying receiver
or scoops E of oscillating shots B for delivering the material from a hopper A
thereto and a connecting rod M and chaiu N for causing the shoots to oscillate
with the bearer D substantially as and for the purpose described.

page_text: 3. Apparatus for automatically weighing granular pulverulent or other similar
material constructed and arranged substantially as described and shown.
Dated this 21st day of November 1896.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.