IMPROVEMENTS IN FILTER-PRESSES
Year: 1882

page_text: LETTERS PATENT to Henry Edward Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Civil Engineer, for an
Invention of "IMPROVEMENTS IN FILTER-PRESSES."-A communication from
abroad by Albert Louis George Dehne, of Halle-on-the-Saal, in the Empire
of Germany.
PROVISIONAL SPECIFICATION left by the said Henry Edward Newton at
the Office of the Commissioners of Patents on the 25th February 1882.
"
HENRY EDWARD NEWTON of the Office for Patents 66 Chancery Lane in the
County of Middlesex Civil Engineer. IMPROVEMENTS IN FILTER PRESSES."
[A communication from abroad by Albert Louis George Dehne, of Halle-on-the-Saal,
in the Empire of Germany.]
The object of this invention is to give to filter presses a greater power of resisting
the action of chemical substances, without injuring the stability of such apparatus.
To this end the plates of the apparatus whether formed of metal or wood are
coated with a protecting covering of lead, tin zinc, copper, bronze or any suitable
metallic alloy, or of vulcanized india rubber or vulcanite.
In manufacturing these plates a core plate of metal or wood is employed. This
plate is provided with several holes, by which the two opposite sides communicate
and so a communication is established between the two sides of the covering to
be applied. The core plate is inserted into a mould and is maintained in a proper
position therein by pins, so that a hollow space of the thickness of the coating is
established around the core plate, and into the hollow space thus formed a suitable
quantity of metal, or alloy of metal, in a molten state is run, thus forming the
covering to the core plate. Or the core plate may be coated with a suitable
compound of india rubber which after being placed with the core plate in the
metal mould may be subjected to vulcanization in the ordinary way.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Edward Newton in the Great Seal Patent Office on the
16th August 1882.
25
”
HENRY EDWARD NEWTON of the Office for Patents 66 Chancery Lane in the
County of Middlesex Civil Engineer. IMPROVEMENTS IN FILTER PRESSES.'
A communication from abroad by Albert Louis George Dehne of Halle on the
Saal in the Empire of Germany.
The object of this Invention is to give to filter presses a greater power of
resisting the action of chemical substances than heretofore without injuring the
stability of such apparatus.
In the accompanying Drawing this Invention is shewn as applied to the filter
plates of filter presses. Fig: 1 being a plan view of a filter plate, and Fig: 2 a cross
section taken on the line x. x Fig: 1.
The plates of the apparatus whether formed of metal or wood are coated with
a protecting covering of lead, tin, zinc, copper or any suitable metallic alloy or
vulcanized india rubber or vulcanite or other material which will remain
unaffected by the action of chemical substances submitted to treatment in the
press.
In manufacturing these plates a core plate a. of metal or wood is employed. This
core plate a. is formed at intervals with holes c. which allow for the two sides of
the covering to be applied becoming connected together. The core plate a. is
inserted into a mould and is maintained in a proper position therein by pins, so as
to leave a hollow space of the thickness of the coating around the coro plate. Into
the hollow space thus formed a suitable quantity of metal or alloy of metal in a
molten state is run which fills the hollow space and runs into the holes c. thus
forming a complete covering b. to the core plate. Or the core plate a. may be
coated with a suitable compound of india rubber which after being placed with
the core plate a. in the motal mould is subjected to vulcanization in the ordinary
way.
Having now described the nature of this Invention for "Improvements in
Filter Presses," as communicated to me from abroad and explained the manner of
carrying the same into effect I claim.
Coating the parts of filter presses with lead, tin, zinc, copper an alloy of metals,
vulcanized india rubber, vulcanite or other suitable material substantially as and
for the purpose set forth.
In witness whereof I the said Henry Edward Newton have hereunto set my
hand and seal the fifteenth day of August in the year of our Lord One
thousand eight hundred and eighty two.