Improvements in Purifiers for Middlings and the like.
Year: 1892

page_text: Date of Application, 12th Dec., 1892
Complete Specification Left, 11th Sept., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Purifiers for Middlings and the like.
I, LEONARD TURNER, of St. Peter's Works Ipswich, in the County of Suffolk,
Engineer, do hereby declare the nature of this invention to be as follows:-
Hitherto to get purifiers to do good work on different stocks, the wind supplied
to the sieves has been adjusted by valves or by speeding the fan, and further adjust-
ment has been made by varying the silk clothing to suit the amount of feed, or
stock coming to the particular machine. In addition to these I propose to adjust
the width of the silk surface to suit the amount of feed coming on to the machine
so that the material upon the silk may always be of a suitable thickness, a very
important point in the purification of middlings, as a too thin feed or too thick
feed always causes bad work. To make a sieve to obtain the above ends I resort
to the construction shewn in the annexed drawing. A A are the sides of the sieve.
B B are splines between which the silk is held, these are fastened to the sides A A
by bolts and thumb screws so that the silk may be stretched by drawing the splines
closer to the sides A. A. CC are the adjustable laths or strips for narrowing or
widening the sifting surface they are fastened by screws to the sides A A and have
slot holes to allow them to be moved to cover more or less of the silk. On each lath
is fixed a piece of felt to prevent any leaking of the material between the lath and
the silk.
Adjusting laths or strips can be used either on both sides or on one side only.
The arrangement shown by the drawing admits of variation and the adjustment
may be made by covering a portion of the silk by adjusting laths underneath the
silk or by any other method which in like manner alters the effective width.
Dated this 12th day of December 1892.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Purifiers for Middlings and the like.
I, LEONARD TURNER, of St. Peter's Works, Ipswich, in the County of Suffolk,
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 :-
Hitherto to get purifiers to do good work on different stocks, the wind supplied
to the sieves has been adjusted by valves or by speeding the fan and further
adjustment has been made by varying the silk clothing to suit the amount of feed,
or stock coming to the particular machine. In addition to these I propose to adjust
the width of the silk surface to suit the amount of feed coming on to the machine
so that the material upon the silk may always be of a suitable thickness, a very
important point in the purification of middlings, as a too thin feed or too thick
feed always causes bad work. To make a sieve to obtain the above ends I
resort to the construction shown in the drawing left with my Provisional
Specification.
AA are the sides of the sieve. B B are splines between which the silk is
held, these are fastened to the sides A A by bolts and thumb screws so that the
silk may be stretched by drawing the splines closer to the sides A A. CC are
the adjustable laths or strips for narrowing or widening the sifting surface, they
are fastened by screws to the sides A A and have slot holes to allow them

page_text: to be moved to cover more or less of the silk. On each lath is fixed a piece of
felt to prevent any leaking of the material between the lath and the silk.
Adjusting laths or strips can be used either on both sides or on one side only.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In purifiers for middlings and the like the combination substantially as described
with the sieves used in such purifiers of laths or strips adjustable to cover more or
less of the silk surface as herein set forth.
Dated this 29th day of Angust 1202
LEONARD TURNER.