IMPROVEMENTS IN THE MANUFACTURE OF STRAINERS TIATES AND IN STRAINER
Year: 1882

page_text: LETTERS PATENT to George Tidcombe Junior of Watford Iron Works Watford
in the county of Herts Paper Makers' Engineer for an Invention of
IMPROVEMENTS IN THE MANUFACTURE OF STRAINERS
TIATES
AND IN STRAINER
PROVISIONAL SPECIFICATION left by the said George Tidcombe, Junior at
the Office of the Commissioners of Patents on the 6th September 1882,
GEORGE TIDCOMBE Junior of Watford Iron Works, Watford in the County of
Herts Paper Maker's Engineers " IMPROVEMENTS IN THE MANUFACTURe of
STRAINERS AND IN STRAINER PLATES
"
This Invention relates to certain improvements in the manufacture of strainers
and in strainer plates the object being to provide means for effectually intercepting
seed and husk or petal in brewing operations and for other straining purposes and
also to improve the formation of strainer plates as described in Letters Patent
granted to me dated the 11th March 1881 and numbered 1066.
Iron or other metal plates used in breweries for the purpose of straining off the
extract of malt or hops and usually placed at the bottom of "tuns" or "backs" are
at present imperfectly made the slits or holes thereof being cast, drilled or punched,
and a great portion of the material itself thereby passes the holes and injures the
extract.
It is desirable therefore to produce such plates or bottoms more accurately so as
not to allow a hop seed, the petal of a hop flower, or the husk of a malt grain to
pass at any part thereof.
I accomplish this object by the following means:-
I take a solid metal plate of sufficient thickness to support a man walking
thereon, and cut grooves on the under side thereof at suitable distances apart, by
means of a circular cutter or cutters, or revolving drill or drills, which I work along
the plate, the required length of the groove or grooves, driven at a suitable speed
according to the material employed and in the centres of these grooves I saw
through accurately by means of a circular saw or saws, or fine revolving drill or
drills, the required slits that will not allow the passage of a hop seed, or the grooves

page_text: may be pressed in these plates, or the plates cast with the grooves therein, and
the slits formed in the way before described.
These plates being made the shape of the tun or back with a suitable margin on
outer rim I fit accurately into the tun by means of a framework of iron or
other permanent support or guide as may be required so as to allow for the
expansion and contraction of the plates or tun without leaking.
These plates which are made with supporting legs or ribs attached thereto may
also be constructed as described in the aforesaid Letters patent for straining pulp
used in the manufacture of paper.
These slitted plates such as described in the said Letters patent may be made
with a supporting framework on to which will be laid a rolled crown plate this
crown plate will be slitted in sections forming crowns to the spaces between the
framework and be secured thereto by tinning the adjacent surfaces and soldering
them under pressure and for the purpose of refining paper pulp for abrasively
removing the irregularites of the saw cuts by means of liquid carrying fine emery
powder after the said saw cuts have been rounded off at their ends by a fine
smooth-blade file specially made for the purpose and wide enough not to buckle or
break.
This make of plate will serve generally as a strainer plate for liquids or
semi-fluid. I also provide suitable rivet heads having eyes therein on the surface
of the plate by which they can be removed for cleansing.
And for the further purpose of straining or preventing the passage of a hop-petal
or malt husk. I employ when desired another set of plates merely perforated with
holes at a suitable distance apart, underneath the above slitted plates.
For absolute cleanliness these plates may be tinned or electro-plated with any
suitable deposit.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Tidcombe, Junior in the Great Seal Patent Office on the 6th
March 1883.
GEORGE TIDCOMBE Junior of Watford Iron Works, Watford in the County
of Herts, Paper Makers' Engineer "IMPROVEMENTS IN THE MANUFACTURE OF
STRAINERS AND IN STRAINER PLATES
"1.
This Invention relates to certain improvements in the manufacture of strainers
and in strainer plates the object being to provide means for effectually intercepting,
seed and husk or petal in brewing operations and for other straining purposes and
also to improve the formation of strainer plates as described in the Specification of
Letters Patent granted to me dated the 11th March 1881 and numbered 1066 and
as described in the Specification of Letters Patent granted to me and dated the
21st April 1882 and numbered 1908.
Iron or other metal plates used in breweries for the purpose of straining off the
extract of malt or hops and usually placed at the bottom of "tuns or backs" are
at present imperfectly made, the slits or holes thereof being cast, drilled or punched
and a great portion of the material itself thereby passes the holes and injures the
extract.
It is desirable therefore to produce such plates or bottoms more accurately so as
not to allow a hop seed, the petal of a hop flower, or the husk of a malt grain to
pass at any part thereof.
I accomplish this object by the following means :—
:
I take a solid metal plate of sufficient thickness to support a man walking
thereon and cut grooves on the underside thereof at suitable distances apart, by
means of a circular cutter or cutters, or revolving drill or drills which I work
along the plate the required length of the groove or grooves driven at a suitable
speed according to the material employed, and in the centres of these grooves I
saw through accurately by means of a circular saw or saws or fine revolving drill
or drills the required slits that will not allow the passage of a hop seed, or the
grooves may be pressed in these plates or the plates cast with the grooves therein
and the slits formed in the way before described.
These slits being made of the shape of the tun or back or in sections to the
shape thereof with a suitable marginal or outer rim I fit accurately into the tun
by means of a frame work of iron or other permanent support or guide as may be
required so as to allow for the expansion and contraction of the plates or tun
without leaking.
These plates which are made with supporting legs or ribs attached thereto, may
also be constructed as described in the aforesaid Letters Patent for straining pulp
used in the manufacture of paper
These slitted plates such as described in the said Letters Patent may be made
with a supporting framework on to which will be laid a rolled crown plate this
crown plate will be slitted or pierced in sections forming crowns to the spaces
between the framework and be secured thereto by tinning the adjacent surfaces
and soldering thein under pressure, this soldering being effected by dipping the
crown plates and framework into molten tin and upon being held together under
pressure during the cooling the soldering will be effected, and for the purpose of
refining paper, pulp they are treated by abrasively removing the irregularities of
the saw cuts by means of liquid carrying fine emery powder alter the said saw cuts
have been rounded off at their ends by a fine smooth blade file specially made for
the purpose and wide enough not to buckle or break.

page_text: This make of plate will serve generally as a strainer plate for liquids of semi-
liquids.
I also provide suitable rivet or bolt heads having eyes therein on the surface of
the plates by which they can be removed for cleansing
And for the further purpose of straining or preventing the passage of a hop
petal or malt husk, I employ when desired another set of plates merely perforated
with holes at a suitable distance apart underneath the above slitted plates.
For absolute cleanliness these plates may be tinned or electro plated with any
suitable deposit.
For straining some kinds of pulp I may adopt crown plates of the ordinary forms,
but I solder them under pressure to their strengthening portions so as to give
greater facility for removing of the worn crown plate and renewing the wearing
surfaces as well as for the purpose of reclosing their slits when desired.
Having now described the nature and particulars of the said Invention I
claim
Firstly. The soldering under pressure of the crown plate of strainer plates to
the strengthening or supporting framework as and for the purposes herein set
forth.
Secondly. The construction of double bottoms for brewers vats or tuns and for
strainers generally with the slitted strainer plates as described in combination
with a perforated plate as and for the purpose herein set forth
In Witness whereof I the said George Tidcombe Junior have herunto set my
hand and seal this fifth day of March in the year of our Lord one thousand
eight hundred and eighty.three