An Improved Riddle for Agricultural Purposes.
Year: 1892

page_text: Date of Application, 23rd-June, 1892
Complete Specification Left, 14th Mar., 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
An Improved Riddle for Agricultural Purposes.
We, THOMAS STEWART, Farmer, Upper Ardroscadale, Bute, and ROBERT
STEWART, Grain Merchant, Store Lane, Rothesay, Bute, do hereby declare the
nature of this invention to be as follows:-
The subject of this invention is an improved riddle or sieve to be used in
connection with fanners whether attached to threshing mills or hand driven
fanners.
It can be made of any suitable material and it differs from an ordinary riddle
in the fact that the holes are constructed in a slanting direction and very much
deeper than usual.
In working, this riddle has great advantages over the ordinary perforated or
woven riddle. From the incline or slant of the hole towards the fans, a great
additional opportunity is given to the current of wind to blow out bits of straw,
chaff &c. or light grain along the surface and over the riddle. The depth of riddle
also. prevents any grass or rough material from catching on the surface, so that
the riddle is always working free.
In cases where the grain is put through the riddle in a rough state, we form a
wire arrangement over the riddle which carries the rougher straw well over the
riddle and helps to prevent it getting choked. The riddle is of course made with
larger holes for the first riddling, and a finer riddle can be used the second time.
It may either be perforated or woven or made of separate laths of zinc or other
suitable material.
Dated this 22nd day of June 1892.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improved Riddle for Agricultural Purposes.
We, THOMAS STEWART, Upper Ardroscadale, Bute, Farmer, and ROBERT
STEWART, Store Lane, Rothesay, Bute, Grain Merchant, 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 :--
Our invention relates to an improved riddle or sieve to be used in connection
with fanners whether hand or power driven.
It consists in the holes or apertures through which the grain or other substance
passes being perforated or constructed obliquely so that a greater opportunity is
given for the fanners to perform their work upon the substance as it passes through
the riddle, the holes of which are slanting towards the fans.
To illustrate our said invention we crave leave to refer to our drawing attached
hereto. Fig. A. shows a general plan of a square or oblong riddle A¹ constructed
of laths of wood and zinc, the holes or apertures being formed by the crossed and
slanting laths a and b. In the drawing the black slats b. are of zinc and slotted
at intervals so as to engage with slots in the wood slats a. fixed across them.
Whilst to intercept large straws or other rough material we show a series of wire
bars fixed to a slat B at one end of the riddle and bent over at the height of about
an inch in order to protect the apertures from getting stopped up.
Of course the riddle may be constructed of any suitable material and in any
convenient manner so as to obtain the oblique direction of the sifting holes or
[Prins erl

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apertures and so as to secure their being of sufficient depth. Nor is it absolutely
necessary to have a preliminary catcher or protector such as B. in all cases.
if provided this might be of any suitable form..
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
In the construction of riddles or sieves for agricultural purposes to be used in
connection with fanners whether hand or power driven the formation of the sifting
holes or apertures in a sloping direction of a sufficient depth so as to incline
towards the fanners substantially as above described.
Dated this 14th day of March 1893.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicants.