Improvements in Grinding and Polishing Discs.
Year: 1887

page_text: Date of Application, 1st Jan., 1887
Complete Left, 29th Aug., 1887
Complete. Accepted, 14th Oct., 1887
Improvements in Grinding and Polishing Discs.
I, HEINRICH WIKTORIN, of Ziegelofen Gasse, 20, in the City of Vienna, in the
Austro-Hungarian Empire, Manufacturer, do hereby declare the nature of my
Invention for "IMPROVEMENTS IN
follows:-
GRINDING AND POLISHING
DISCS
My invention relates to improvements in grinding and polishing discs.
دو
to be as
It is well known that emery, felt and other discs or wheels are used with crocus for
polishing metals but the results produced by the same are far from satisfying the
requirements of practical manufacturers, for instance, emery wheels cannot be employed
for fine polishing for brass, copper or bronze, as they are extremely hard and liable to
spring, thus producing uneven surfaces in the goods, whereas polishing by means of
felt discs is very time consuming and expensive.
Leather discs have proved the best but they have the disadvantage that when they
are fresh they scratch the ware.
My new composite grinding and polishing disc or wheel overcomes all the dis-
advantages hitherto experienced and can be employed for treating iron, steel, brass,
copper, bronze, nickel silver and other metals, can be used up to the last without
fresh emery being necessary, the same are cheaper than any other grinding or
polishing material, are durable and very tough without smearing.
My discs or wheels consist of cork parings, glue, shellac or other adhesive matter,
emery and syrup, the proportions of which are varied according to the metal or metals
to be treated.
The best proportions for brass are:-
1 part glue, shellac or other adhesive matter,
15 monta cork parings
For iron or steel
[Price bat.]
1 part glue or other adhesive matter
1 part cork parings
1 part emery.

page_text: In order to produce my improved discs the glue (shellac or other adhesive matter)
is soaked in water for 24 hours, then placed in a cast iron or other vessel, continuously
stirred and heated up to the boiling point. The concentration of the solution depends
on the fineness of the desired product. The cork parings or grains are now introduced
into the adhesive solution and well stirred for at least 5 minutes, then the emery added
to the same and the mass stirred until the same takes the form of a compact or stiff
dough which is allowed to cool down to 80° or 40°.
This compact mass which is now placed in previously well oiled forms and remains
in the same until it is entirely cooled when it is removed, placed in a drying chamber
and slowly dried at about 300 Reamur which requires according to the thickness of
the disc or wheel from 3 days to 3 weeks. When the discs or wheels are dry they
are pressed between warm cast iron plates and straightened. The cold finished discs
are now tested by being subjected to the double number of rotations for which they
are destined in order to be sure that the same will oven under greater rotation not
break. After being subjected to this test the discs or wheels are varnished to protect
them from atmospheric influence.
In addition to the advantages mentioned above the discs or wheels can be made of
any desired hardness.
ALLISON BROS.,
Agents for the Applicant.

page_text: I, HEINRICH WIKTORIN of No. 20 Ziegelofen Gasse in the City of Vienna, Austria,
Gentleman, do hereby declare the nature of my said 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 relates to improvements in grinding and polishing discs.
It is well known that emery, felt and other discs or wheels are used with crocus for
polishing metals but the results produced by the same are far from satisfying the
requirements of practical manufacturers, for instance, emery wheels cannot be employed
for fine polishing for brass, copper or bronze as they are extremely hard and liable to
spring, thus producing uneven surfaces in the goods, whereas polishing by means of
felt discs is very time consuming and expensive.
Leather discs have proved the best but they have the disadvantage that when they
are fresh they scratch the ware.
My new composite grinding and polishing disc or wheel overcomes all the dis-
advantages hitherto experienced and can be employed for treating iron, steel, brass,
copper, bronze, nickel, silver and other metals can be used up to the last without fresh
emery being necessary, the same are cheaper than any other grinding or polishing
material are durable and very tough without smearing.
My discs or wheels consist of an intimate admixture of cork parings, glue, shellac
or other adhesive matter, emery, flint glass or other similar material and syrup from
sugar refineries or glycerine, the proportions of which are varied according to the
metal or metals or other material to be treated.
The best proportions for brass are:-
1 part glue, shellac or other adhesive matter, "
15 parts cork parings,
1 part emery
0,1 part glycerine or syrup from sugar refineries which latter can however
be omitted.

page_text: The same proportions as given for hard wood can also be employed for slate, bone
and various kinds of stone.
In order to produce my improved discs the glue (shellac or other adhesive matter)
is soaked in water for 24 hours, then placed in a cast iron or other vessel continuously
stirred and heated up to the boiling point.
The concentration of the solution depends on the fineness of the desired product.
The cork parings or grains are now introduced into the adhesive solution and well
stirred for about 5 minutes, then the emery glass or flint or other similar material of
desired fineness added to the same and the mass stirred until the same takes the form
of a compact or stiff dough, which is allowed to cool down to about 40°.
This compact mass which is now placed in previously well oiled forms or moulds
and remains in the same until it is entirely cooled when it is removed, placed in a
drying chamber and slowly dried at about 30° Reamur which requires, according to
the thickness or the disc or wheel from 3 days to 3 weeks. When the discs or wheels
are dry they are pressed between warm cast iron plates to be straightened, and are
left there until they are cold.
The cold finished discs are now tested by being subjected to the double number of
rotations for which they are destined in order to be sure that the same will even
under greater rotation not break. After being subjected to this test the discs or
wheels are varnished to protect them from atmospheric influence. In addition to the
advantages mentioned above, the discs or wheels can be made of any desired
hardness.
Having now particularly described and ascertained the nature of iny said invention
and in what manner the same is to be carried into effect I desire it to be understood
that what I claim and desire to secure by letters patent is :-
The manufacture of grinding and polishing discs from glue, cork, syrup or
glycerine with an addition of emery, flint, glass or other similar materials for grinding
and polishing or grinding or polishing metals, wood, bone, horn, slate, all kinds of
stone or other material according to the composition and moulding of the discs,
substantially as and for the purpose set forth in the foregoing specification.
Dated this 29th day of August 1887.
ALLISON DRUD.,
Agents for the Applicant.