IMPROVEMENTS IN SCREENS OR SIEVES FOR PURIFYING OR SIEVING MACHINERY
Year: 1885

page_text: Machinery.
I, HENRY SIMON, of No 20 Mount Street Manchester in the county of
Lancaster, Civil Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN SCREENS OR SIEVES FOR PURIFYING OR SIEVING MACHINERY
to be as follows:-
«
"
In purifying or sieving machinery such as is used for sieving pulverulent or
granular materials, as in flour milling, sieving or screening surfaces consisting
generally of silk or other fabric or wire gauze stretched over frames are generally
used, and when these surfaces become worn or defective, it is in many cases
difficult to get into the machines to remove them and fix new ones in their place.
My present invention relates to an improved construction of the frames and mode
of fixing the screening surfaces thereto whereby the latter can be readily removed
and replaced. For this purpose, I construct a frame, the sides of which have a
trough shaped section and within the hollow sides of the frame I place two separate
side pieces with narrow spaces intervening between the tops and with wider spaces
between the sides of the two frames.
:
I construct the silk or other screening surface with a thickened edge or fillet
along cach side thereof, which may be conveniently formed of a cotton or linen
edging wrapped round a stiff cord or by wrapping the edge of the silk round the
same, so that by slipping the screening surface in from the end between the frame
and the side pieces it will be held therein by the two thick edges or hems fitting
into the wider spaces existing at the sides of the frames, such edges not being
capable of being drawn out through the narrow spaces between the tops of the
frame and side pieces.
The side pieces are connected to the outer frame by means of adjusting screws,
so that when the screening surface has been slipped in it can be stretched to any
required degree by tightening up the said screws.
The ends of the silk or other screening surface may be secured by laces passing
through eyelet holes in the silk, and round pins on the frame, or by other known
means.
The above described arrangement offers the great advantage that the silk or
other screening surface can be stretched at any time during the working of the
machine by turning the nuts of the adjusting screws.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: COMPLETE SPECIFICATION.
Improvements in Screens or Sieves for Purifying or Sieving
Machinery.
I, HENRY SIMON, of No 20 Mount Street, Manchester in the County of
Lancaster, Civil 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:—
In purifying or sieving machinery such as is used for sieving pulverulent or
granular materials, as in flour milling, sieving or screening surfaces consisting
generally of silk or other fabric or wire gauze stretched over frames are generally
used, and when these surfaces become worn or defective, it is in many cases
difficult to get into the machines to remove them and fix new ones in their place.
My present invention relates to an improved construction of the frames and
mode of fixing the screening surfaces thereto whereby the latter can be readily
removed and replaced. For this purpose, I construct a frame, the sides of which
have a trough shaped section and within the hollow sides of the frame I place
two separate side pieces with narrow spaces intervening between the tops and with
wider spaces between the sides of the two frames.
I construct the silk or other screening surface with a thickened edge or fillet
along each side thereof, which may be conveniently formed of a cotton or linen
edging wrapped round a stiff cord or by wrapping the edge of the silk round the
same, so that by slipping the screening surface in from the end between the frame
and the side picces, it will be held therein by the two thick edges or hems fitting
into the wider spaces existing at the sides of the frames, such edges not being
capable of being drawn out through the narrow spaces between the tops of the
frame and side pieces.
The side pieces are connected to the outer frame by means of adjusting screws,
so that when the screening surface has been slipped in, it can be stretched to any
required degree by tightening up the said screws.
The ends of the silk or other screening surface may be secured by laces passing
through eylet holes in the silk, and round pins on the frame, or by other known
means:
The above described arrangement offers the great advantage that the silk or
other screening surface can be stretched at any time during the working of the
machine by turning the nuts of the adjusting screws.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 of the drawings shews a longitudinal section of a screen or sieve con-
structed according to the above described invention; Fig. 2 shews a cross section,
Figs. 3 and 4 shew the opposite end views and Fig. 5 shews a plan. A is the frame
with trough shaped sides, within which are placed the loose bars B B, having
notches or recesses B¹ formed along their inner edges into which fit the thickened
edges of the silk or other screening surface C, so that when this is slipped in
from one end of the frame in the narrow space between A and B, and the bars
T

page_text: are then drawn asunder by the adjusting screw bolts with thumb nuts D, the bars,
in holding on to the silk by the thickened edges will tighten the silk to the
requisite degree. It will be evident that the bars B need not necessarily be
notched to receive the edges of the silk, as these might extend beyond the edges
of the bars. The longitudinal stretching of the silk is by preference effected by
means of laces E passed through eylet holes in the silk and over pins F on the
frame A but any other arrangement may be used.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
Constructing screens or sieves with loose bars fitting into trough shaped sides
of a framing, and so arranged as to hold the silk or other screening surface by
means of thickened edges formed thereon, when the silk is passed between the
bars and the frame, so that when the bars are moved asunder by adjusting screws
they effect the tightening of the silk, substantially as herein described.
Dated this 20th day of October 1885.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.