Year: 1897

page_text: I, LOUIS CHAMBON, of 16, Rue Drouot, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention has for its object an improved machine enabling all sorts of pro-
ducts generally sold in packets of a given weight, such as coffee, tapioca, rice and
the like, to be weighed automatically and with great precision.
It is characterized by the combination with a recipient or holder containing the
substance to be weighed, of a tube placed below the said receptacle and in which
moves an endless screw conveyor, the pitch of which is progressive, with the object
of dividing the substance supplied in order to cause it to fall in small quantities
into the bag placed on a scale.
The apparatus is completed by a verifying lever which receives, by means of
suitable parts, a movement corresponding to that of the distributing screw and
which is locked or wedged by the needle of the balance as
as the
desired weight is reached, thus arresting the movement of the screw and con-
sequently stopping the distribution.
soon
The improved machine consists of a reservoir or holder containing the substance
to be weighed, and a tube into which this substance falls by its own weight and
which is then carried forward by a motor screw revolving in said tube. This
screw is made in two parts, of which the first has one thread, and the second has
two, three, four or more threads, which enables it to divide the substance fed by
the first part of the screw and cause it to fall into the bag in small quantities. A
verifying lever is arranged in combination with the levers and the cams to pro-
duce the automatic stoppage of the distributing screw. A balance is arranged
to support on its plate or pan the bag which is to be filled, weights being placed on
the other plate or pan of the scales. The needle of this balance serves at a suitable
moment as stop for the verifying lever in order to arrest the working of the
distributing screw.
The working of the machine is as follows:
-
The necessary weights are placed on the one plate or pan of the balance, and a
bag or other suitable receptacle is placed on the other plate or pan below the
orifice of the tube. The distributing screw is operated by a wheel and an endless
screw mounted on the driving shaft. At each revolution of this shaft a roller
carried by a lever encounters the hollow part of a cam mounted on the shaft and
causes the lever to make an oscillation and the verifying lever mounted on a com-
mon spindle therewith makes a similar movement. The end of the needle of the
balance being exactly in front or opposite a hole arranged in the verifying lever
the latter may follow all the oscillations produced by the cam, whilst the roller of
another lever raised by a cam engages in a suitable cavity of a lever and maintains
the locking. When the weight is reached, the needle having oscillated comes on
The roller remains by
the full part of the verifying lever and stops its movement.
this fact in the rear position, When the cam encounters it it lifts the locking

page_text: lever which then releases another lever which by the action of a spring releases
a friction pulley and consequently immediately arrests the distribution of the
substance. Finally during all the period of the distribution the verifying lever
ensures that the balance or scale shall make no movement, and when the weight is
reached the stoppage of the movement of this lever produces the stoppage of the
movement of the machine. It is evident that by multiplying the number of
verifications in proportion to the quantity of the substance to be distributed a
very great precision may be attained.
The forms, dimensions, proportions and accessory parts of the apparatus may of
course be varied, and any suitable material may be employed for their construction
without thereby departing from the nature of the invention.
Dated this 5th day of August 1807
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
ved machine for weigning Automatically.
I, LOUIS CHAMBON, of 16, Rue Drouot, Paris, in the Republic of France,
Engineer, 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:-
My invention has for its object an improved machine enabling all sorts of pro-
ducts generally sold in packets of a given weight, such as coffee, tapioca, rice and
the like, to be weighed automatically and with great precision.
It is characterised by the combination with a recipient or holder containing the
substance to be weighed, of a tube placed below the said receptacle and in which
moves an endless screw conveyor, the pitch of which is progressive, with the object
of dividing the substance supplied in order to cause it to fall in small quantities
into the bag placed on a scale.
The apparatus is completed by a verifying lever which receives, by means of
suitable parts, a movement corresponding to that of the distributing screw and
which is locked or wedged by the needle of the balance as soon
as the
desired weight is reached, thus arresting the movement of the screw and con-
sequently stopping the distribution.
In order to allow of the description being better understood I will now refer to
the accompanying drawings in which
Figure 1 is a plan view of the machine; Figure 2 a front sectional elevation
of the same; Figure 3 a side sectional elevation; Figure 4 a detail of one of the
parts of the machine.
The same letters of reference represent the same parts in the various figures.
The improved machine consists of a reservoir or holder A containing the
substance to be weighed, and a tube B into which this substance falls by its own
weight and which is then carried forward by a motor screw C revolving in said
tube. This screw is made in two parts, of which the first c has one thread, and the
second c¹ has two, three, four or more threads, which enables it to divide the
substance fed by the first part of the screw and cause it to fall into the bag Z in
small quantities. A verifying lever D is arranged in combination with the
levers EFG and the cams H and I to produce the automatic stoppage of the dis-
tributing screw C. A balance K is arranged to support on its plate or pan N the
bag Z which is to be filled, weights being placed on the other plate or pan M of the

page_text: scales. The needle L of this balance serves at a suitable moment as stop for
the verifying lever D in order to arrest the working of the distributing screw.
The working of the machine is as follows;--
The necessary weights are placed on the one plate or pan M of the balance,
and a bag Z or other suitable receptacle is placed on the other plate or pan N
below the orifice of the tube B. The distributing screw C is operated by a
wheel Q and an endless screw R mounted on the driving shaft S which is provided
with a friction clutch adapted to be operated by a lever X (Figures 2 and 3) to be
thrown into or out of gear with the belt pulley. At each revolution of this shaft
the recessed or flattened part of the cam H mounted on the shaft S comes opposite
a roller T carried by the lever E and causes the lever to make an oscillation on the
rock shaft V as the roller moves into and then out of the recess in the cam and the
verifying lever D mounted on the same rock shaft V makes a similar movement.
When the end of the needle of the balance is exactly in front or opposite a hole P
arranged in the verifying lever D, the latter will be free to oscillate under the
action of the cam H, and at the same time a roller U mounted on the lever F
will be raised by the cam I into a suitable recess in the lever G without moving
the latter. When however the weight is reached, the needle L having oscillated
with the swing of the scales will no longer be opposite the hole P but will come on
the full part of the verifying lever D and stop its oscillation and keep it up.
roller U of the lever F which is pivoted on the lever E will now remain to the
left of the recess in the lever G so that when the cam I encounters the roller U the
latter cannot enter the said recess but, as shown in Figure 4, will lift the said
lever G into the position shown in dotted lines in which position a suitable pro-
jection on the boss of the lever comes clear of the aforesaid lever X which under
the action of a spring Y (Fig. 1) will then move sideways sufliciently to disengage
the friction clutch and consequently immediately stop the screw C and arrest the
distribution of the substance. Finally during all the period of the distribution
the verifying lever D ensures that the balance or scale shall make no movement,
and when the weight is reached the stoppage of the movement of this lever produces
the stoppage of the movement of the machine.
The
The forms, dimensions, proportions and accessory parts of the apparatus may of
course be varied, and any suitable material may be employed for their construc-
tion without thereby departing from the nature of the invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
A machine for weighing automatically, characterized by the combination with a
receptacle or holder containing the substance to be weighed, of a tube placed
beneath the said holder in which tube an endless distributing screw with a pro-
gressive pitch is revolubly arranged, and an arrangement of levers operated by suit-
able cams and adapted to be locked by the needle of the balance as soon as the weight
is reached, the said locking causing the arrest of the movement of the screw and
consequently of the distribution, the whole substantially as herein before described
and shown as an example in the accompanying drawings.
+1: 0011 1
c
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.