ROV MANUFACTURE
Year: 1882

page_text: LETTERS PATENT to Frederick Field of Kelvin Grove Beckenham in the
County of Kent for an invention of IMPROVEMENTS IN THE MANUFACTURE
PROVISIONAL SPECIFICATION left by the said Frederick Field at the Office
of the Commissioners of Patents on the 25th May 1882.
FREDERICK FIELD of Kelvin Grove Beckenham in the County of Kent
"IMPROVEMENTS IN THE MANUFACTURE OF COMPOUNDS SUITABLE FOR ELECTRICAL
INSULATION AND OTHER PURPOSES
"
According to my present invention I produce a compound suitable for electrical
insulation and other purposes by mixing with woody fibre or cellulose in a fine
state of subdivision the substance known as "black wax," being the residue of the
distillation of the mineral Ozokerit, or a compound of this material with india
rubber or gutta-percha, produced either as described in Matthiessen's Patent
No 3778 of 1869 or as described in Field and Talling's Patent No 1938 of 1875.
After incorporating the said substances with the woody fibre or cellulose, I
subject the compound to pressure and form it into blocks of' any desired
configuration.
When using the compounds of the "black wax" and india-rubber I also in some
cases add sulphur thereto and subject the compound to the well known vulcanising
process used for the manufacture of ebonite or vulcanite.
In some cases I use either in combination with or in place of the woody fibre,
charcoal or carbonised cellulose in a fine state of subdivision.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederick Field in the Great Seal Patent Office on the
22nd November 1882.
FREDERICK FIELD of Kelvin Grove Beckenham in the County of Kent
"IMPROVEMENTS IN THE MANUFACTURE OF COMPOUNDS SUITABLE FOR ELECTRICAL
INSULATION AND OTHER PURPOSES."
According to my present invention I produce a compound suitable for electrical
insulation and other purposes by mixing with woody fibre or cellulose in a fine
state of subdivision the substance known as "black wax," being the residue of the
distillation of the mineral Ozokerit, or a compound of this material with india
rubber or gutta-percha, produced either as described Matthiessen's Patent No 3778
of 1869 or as described in Field and Talling's Patent No 1938 of 1875.
After incorporating the said substances with the woody fibre or cellulose, I
subject the compound to pressure and form it into blocks of any desired
configuration.
When using the compounds of the "black wax " and india-rubber I also in some
'cases add sulphur thereto and subject the compound to the well known vulcanising
process used for the manufacture of ebonite or vulcanite.
In some cases I use either in combination with or in place of the woody fibre,
charcoal or carbonised cellulose in a fine state of sub-division.
Having thus described the nature of my invention and in what manner the
same is to be performed, I claim :
First. The manufacture of compounds for electrical insulation and other purposes
consisting of the admixture of "Black-wax" or the residue of the distillation
of Ozokerit with woody fibre or cellulose in a fine state of subdivision, the
said woody fibre being either in its natural state or partly or wholly
carbonised
Second. The manufacture of compounds for electrical insulation and other purposes
consisting of the admixture of a compound of "black-wax" and caoutchouc
or gutta-percha with woody fibre or cellulose in a fine state of subdivision
the said woody fibre being either in its natural state or partly or wholly
carbonised.
Third. In the manufacture of compounds consisting of "black-wax," caoutchouc
and woody fibre referred to in the preceding claim, the admixture of sulphur
therewith and the vulcanising of the compound so produced.
In Witness whereof I the said Frederick Field have hereunto set my hand
and seal this sixteenth day of November in the year of our Lord One
thousand eight hundred and eighty two