An Improvement in Rotary Sieves.
Year: 1895

page_text: Date of Application, 26th June, 1895
Complete Specification Left, 24th Mar., 1896-Accepted, 25th Apr., 1896
An Improvement in Rotary Sieves.
I, GEORGE HENRY HADDEN, of 36 Bromar Road, Denmark Park, in the
County of London, Shorthand Writer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to means of preventing the meshes of a rotary sieve
employed for sifting flour or other materials from becoming stopped up by particles
of the sifted material, as often occurs especially when the material is somewhat
moist. For this purpose, the silk or other fabric constituting the sifting surface
is divided into two widths separated by a longitudinal bar the upper edge of which
is hinged to a frame carried by and moving with the sieve, and its lower edge has
As the
attached to it the fabric which is a little wider than the sieve frame.
sieve moves in its circular path the biuged bar is caused to swing from side to
side like a pendulum alternately tightening and loosening the two widths of sifting
material; and this has the effect of clearing its meshes.
Dated this 26th day of June 1895.
ABEL & IMKAI,
Agents for the Applicant.
I, GEORGE HENRY HADDEN, of 36 Bromar Road, Denmark Park, in the
County of London, Shorthand Writer, 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:-
This invention relates to means of preventing the meshes of a rotary sieve
employed for sifting flour or other materials from becoming stopped up by particles
of the sifted material, as often occurs especially when the material is somewhat
moist.
For this purpose, the silk or other. fabric constituting the sifting surface is
divided into two widths separated by a longitudinal bar the upper edge of which
is hinged to a frame carried by and moving with the sieve, and its lower edge has
attached to it the fabric which is a little wider than the sieve frame.
As the sieve moves in its circular path the hinged bar is caused to swing from
side to side like a pendulum alternately tightening and loosening the two widths of
sifting material and this has the effect of clearing its meshes.
Fig. 1 of the accompanying drawings is a vertical section of a sieve provided
with a swinging bar according to this invention.
Fig. 2 shews a modification, the sieve being made in two parts each provided
with a swinging bar.

page_text: A is the silk or other sifting surface, B B are the side bars to which the silk
is attached, C is the swinging bar to which the silk which is somewhat loose is
attached, so that as the sieve moves in its circular path, the silk on each side of
the bar is by the pendulous swinging of the bar alternately tightened and loosened,
its meshes being thus kept clear. In Fig. 2, in which A is the silk made in two
parts, B are the side bars, and CC are the swinging bars, one for each silk, which
is alternately tightened and loosened as above described.
Obviously a single sieve may be made as half of that shewn in Fig. 2, with the
swinging bar at one side.
Having now particularly described and ascertained the nature of this inven-
tion and in. what manner the same is to be performed, I declare that what I
claim is :-
A rotary sieve having its silk or other sifting surface somewhat loose and
.attached to a swinging bar, substantially as and for the purpose set forth.
Dated this 24th day of March 1896.
ABEL & IMRAY,
Agents for the Applicant.