Improvements in the Construction of Drums used for Straining or Picking" Paper Pulp and for other similar purposes.
Year: 1897

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PROVISIONAL SPECIFICATION.
Improvements in the Construction of Drums used for Straining or
Picking" Paper Pulp and for other similar purposes.
$6
We, CHARLES WALMSLEY, Engineer, and CHARLES WALMSLEY AND COMPANY
LIMITED, Machine Makers, both of Atlas Iron Works, Elton, Bury, in the County
of Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction or manufacture of the cylindrical
"built-up" drums used for straining or "picking" paper pulp for paper makers
and for other similar purposes, and the principal object of the invention is to
construct or build up such drums or cylinders without the use of either solder or
rivets.
These drums or cylinders are made of grooved or slotted plates mounted between
two cast metal drum heads. The plates are made in duplicate and are inter-
changeable.
The drum heads are made with an inner flange near the periphery so that they
can be correctly and accurately turned up and faced.
Each flange has three or more bosses cast beneath it, the said bosses being bored
out to receive the rounded ends of longitudinal bars or beams of suitable section,
each bar having at each end a cylindrical turned pin or pivot fitting into the
bored out hole in the bosses of one or other of the drum heads, and held firmly in
place by means of screws or bolts.
037
Improvements in the Construction of Drums used for Straining or
"Picking" Fager Pulp and for other similar purposes.
We, CHARLES WALMSLEY, Engineer, and CHARLES WALMSLEY AND COMPANY
LIMITED, fachine Makers, both of Atlas Iron Werks, Elton, Bury, in the County
of Lancaster, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
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This invention relates to the construction or manufacture of the cylindrical
built-up" drums used for straining or "picking" paper pulp for paper makers,
and for other similar purposes, and the principal object of the invention is to
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page_text: construct or build up such drums, or cylinders without the use of either solder or
rivets.
Our improvements will be readily understood on reference to the annexed sheet
of drawings and the following explanation thereof.
Fig. 1 is a longitudinal elevation partly in section, and Fig. 2 is a half end view
and transverse section of a drum "built-up" according to our invention and
Figs. 3 and 4 are detached views on a larger scale of details hereinafter more
particularly referred to.
The drums or cylinders are built up of a series of grooved or slotted plates
mounted between two cast metal drum heads a, the plates are made in duplicate
so as to be interchangeable.
The drum heads a are made with an inner flange 6 near the periphery, so that
they can be correctly and accurately turned up in a lathe and faced.
Each flange b has three or more bosses c cast beneath it (see Fig. 3) the said
bosses being bored out to receive the rounded ends (see Fig. 4) of longitudinal bars
or beams d of suitable section; each bar d having at each end a cylindrical turned
pin or pivot e fitting into the bored out hole f in one or other of the bosses c of
the drum heads a and being screwed up solid and held firmly in place by means
of screws or bolts g (see Figs. 1 and 2), the opposite ends of the bars d being
secured in the same manner.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
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The improvements in the manufacture of drums or cylinders used for straining
or picking" paper pulp, and for other similar purposes consisting in the method
of attaching and securing the longitudinal bars or beams d to the drum heads a
without the use of rivets or solder in the manner hereinbefore described and illus-
trated by the drawings annexed.
GEO. DAVIES & SON,
Agents for the Applicants, 4, St. Ann's Square, Manchester.