Improvements in Fixing Screen Bars for Disintegrators.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Fixing Screen Bars for Disintegrators.
GEORGE PEARSON WALLIS, 5, Wormald Row, Leeds, Engineer, do hereby
declare the nature of this invention to be as follows:-
These improvements consist in entirely doing away with the present method of
fixing the screen bars, such method being to use molten metal to fix and hold the
bars in position. I provide metal segments for half the circumference round the
bottom of grinding chamber, with indents similar to the section of screen bars used.
These indents are spaced out, to suit the space required between the screen bars.
A strip of india-rubber or other similar material is fixed to the bottom edges of
grinding chamber, in such a way that when the bars are fixed, it forms a cushion to
take up any inequalities in the bars or indents of the segments. The method of
fixing the bars is as follows:-
The segments round one side of the periphery of bottom half of grinding
chamber are loosely held in position by bolts and wedges provided for that purpose.
The screen bars are now placed in the indents of the segments, and the nuts of the
bolts tightened. As the nut presses against a wedge which is acting on the
segment, the segment carrying the bars is pressed against the india-rubber fixed to
bottom edge of grinding chamber and thus secured.
The segments on the other side of grinding chamber are now secured in the same
way and the bars are fixed. This arrangement also applies for fixing the bars at
both sides of grinding chamber.
Dated this 21st day of August 1894.
COMPLETE SPECIFICATION.
Improvements in Fixing Screen Bars for Disintegrators.
GEORGE PEARSON WALLIS, 5, Wormald Row, Leeds, Engineer, 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 :-
These improvements consist in entirely doing away with the present method of
fixing the bars, such as the use of molten metal for fixing and holding the bars in
position. I provide metal segments "D" for each side of the grinding chamber,
with the indents similar to the section of screen bars used, such screen bars being
indicated at "C." A strip of india-rubber or other similar material is fixed to the
bottom of the grinding chamber, in such a way that when the bars "C" are fixed
in position, it forms a cushion to take up any inequalities in the bars "C," or
indents of the segments D, or the flange H of the casting F. Wedge pieces E are
provided in connection with the screwed rods "G," to force the segments "D"
towards the flange H.
The bars "C" are now placed in position in the indents of the segments "D,"
The
and the wedge pieces E tightened up by nuts on the screwed rods G.

page_text: wedges E force the segments D towards the flange H, and thus fixes the bars "C"
between the segments D and the flange H. The bars C can be altered to any
pitch and the spaces between them increased or diminished, by simply providing
segments with indents of a suitable pitch. This arrangement also applies for
fixing the bars at the sides of the grinding chamber. The bars "C" can be turned
pr renewed without difficulty.
round
Having now particularly described and ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is :-
1st. The use of the segments D with the indents in connection with the wedge
pieces E for fixing the screen bars "C."
Dated this 21st day of May 1895.