AN IMPROVED WEIGHING OR MEASURING APPARATUS
Year: 1884

page_text: COMPLETE SPECIFICATION.
I HERMANN STANGE, Mechanician, of N° 83 Lindenau Strasse in the City of
Dresden in the Kingdom of Saxony and German Empire do hereby declare the
nature of my Invention for AN IMPROVED WEIGHING OR MEASURING APPARATUS,
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention relates to the construction of a rotary double bearing which can
be employed by weighing and other measuring instruments.
The double bearing consists of two parts an internal star formed part or journal
collar and an external part which is hollowed out in the form of a regular polygon
or pentagon in which the star formed journal collar can move.
The distance of the points of the star-like journal collar from each other
corresponds exactly with the length of each side of the pentagonal ring bearing or
outer part so that two points of the starlike journal collar can have their bearings
in two corners of the said pentagonal ring bearing which is carried in suitable
bearings arranged in appropriate standards. When my improved device is employed
with measuring or weighing apparatus the starlike collar is fixed to the journal of
the beam direct or is attached to a journal or axle which is connected in suitable
manner to the beam which carries the counter weight and to a drum or other
vessel which latter forms the measuring or weighing vessel and can make a limited
rotary movement i.e. rotates stepwise.
This measuring drum is provided with several compartments which can receive
a certain fixed quantity of the matter or material to be measured or weighed and
makes a quarter revolution when each and every following compartment has
become filled with the predetermined quantity of matter to be weighed or
measured.
The next following knife edge then becomes balanced in its corresponding seat
in the starlike collar or bearing and is held in this position by means of a suitable
counterweight until the compartment following has become sufficiently filled so
that the same can overcome the weight of the counterweight and again make a
quarter revolution.
The rotary motion is so arranged that as soon as the same is completed the filled
compartment is emptied and a fresh empty compartment brought under the charging

page_text: It is evident that when each compartment is made to contain a certain pre-
determined quantity of the matter or material to be measured or weighed each
part revolution of the outer pentagonal ring bearing represents this said
predetermined quantity and that this part revolution can be transferred to a
suitable registering apparatus so that the exact quantity of matter or material
passing through the continuously operating apparatus is registered at every part
revolution of the said bearing and the measuring vessel in connection with the
same.
The accompanying drawing represents the double bearing with the star formed
journal collar in two positions in the one of which only one point or knife edge in
the other two points or knife edges of the star formed journal collar is or are in
contact with the interior surface of the pentagonal hearing.
Figure 1 is an elevation of the double bearing whereby the inner star like
bearing or journal collar is balanced on the vertically disposed knife edge b.
Figure 2 is a section on the line a B in Figure 1.
Figure 3 is an elevation of my improved device whereby the inner star formed
journal collar or bearing has become tipped to the right so that two of the points
or knife edges are in contact with two corners of the outer pentagonal bearing
ring.
Figure 4 is a section on the line ✗8.
a is the axle or shaft on which the beam and counterweight are arranged and
which carries the star formed collar b which 'can make a partial revolution in the
bearing ring c which is interiorally provided with regular pentagonal surfaces of a
length exactly corresponding to the distance between two points or knife edges of
the star like collar b.
The bearing c is connected to a shaft d which is carried in a suitable standard.
The measuring drum is provided with various compartments and is arranged on
the shaft a.
These said compartments are filled from a charging-hopper-whereby the counter-
weight is so arranged that as soon as the respective compartment is charged with
the matter or material to be measured a part rotation of the shaft a, the drum and
the bearing c ensues by the centre of gravity now being removed lateral to the
axis of the shaft a so that this said compartment is emptied, and an empty
compartment brought under the charging hopper.
During this partial rotation of the measuring drum and the shaft or axle a two
of the points or knife edges come in contact with two corners of the pentagonal
ring bearing and cause also a partial revolution of the same whereas when the
druin is balanced only one knife edge is in contact with the said pentagonal ring c.
It is therefore evident that the rotation of the shaft or axle a and the star like
collar b is limited whereas the beam can play freely when only one knife edge is in
contact with the pentagonal ring c.-In other words-The starlike bearing b with
four arms is fixed on the shaft a and arranged in the hollow bearing c the interior
surface consists of a pentagon or more sided polygon with sides of equal size.
The size of the inner bearing c is so chosen that the axis a lies beneath the
axis d of the polygonal bearing c in such manner that two adjacent points or knife
edges of the starformed bearing b continuously gear into two corners of the
polygonal bearing c.
If the bearing b stands in the position shewn in Figure 1 the same can oscillate
somewhat without moving the bearing o
The free movement is employed as bearing for the weighing beam in rotary
weighing machines in order to attain an exact and frictionless weighing.
The burden carried by the bearing b produces in the position shown in Figure 1,
pressure on the axle d of the bearing c alone.
If the bearing b is now moved to the one or the other side the next knife edge will
press on the corresponding corner f of the polygon and the centre of gravity be
moved to the side of the axis of the bearing c, lateral pressure applied to the same
and consequently a rotation of the said bearing e produced Figure 2.

page_text: This movement ceases in the moment when the axis a attains a position in line
with the axis d whereupon the movement described above is repeated. The
exterior form of the bearing c is round and the same can be arranged in suitable
bearings but in order to avoid excessive friction the axis d is preferably arranged
in the centre of the bearing.
The motion of the parts is arrested (as soon as the compartment previously filled
is emptied) by means of the counterweight on the shaft a and the said shaft
and its journal collar brought into a like position on the second knife edge as it
previously occupied on the first knife edge (Figure 1) and so on.
It is evident that the number of knife edges and sides of the polygon can be
modified without departing from the tenor of my invention.
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.The construction and application of a rotary double bearing to weighing and
measuring machines consisting of two parts possessing movement independent of
each other and also simultaneous motion, a starlike collar 6 with four knife edges
connected to the journal of the axle or shaft a and a ring bearing c the inner
surface of which forms a regular pentagon whereby the distance between each
two knife edges corresponds exactly with length of the sides of the pentagon
substantially as described and shown in the drawings.
2. The construction and application of alternately acting double bearings in
weighing and measuring machines in such manner that the measuring drum is
connected to the axle or shaft a and is charged from a charging hopper whilst the
axle or shaft a is also provided with a suitable beam and counterweight which is
so arranged that a partial rotation takes place as soon as the one compartment of
the measuring drum is filled and the knife edge afterwards brought into correct
position for weighing or measuring the charge in the next succeeding compartment
substantially as described and shewn in the drawings.
Dated 29th March 1004.
Witnesses,
RICD. SCHMIDZ.
ARTHUR HOFzeldt.
HERRMANN STANGE