An Improved Portable Screen, Sackholder, Sacklifter, and Weighing Machine for Coal, Grain, or similar Material.
Year: 1891

page_text: Date of Application, 6th Nov., 1891
Complete Specification Left, 31st Dec., 1891--Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
An Improved Portable Screen, Sackholder, Sacklifter, and Weighing
Machine for Coal, Grain, or similar Material.
I GEORGE MITCHENALL of No. 246 Gipsy Road West Norwood London S.E.
Sanitary Engineer do hereby declare the nature of this invention to be as
follows:-
My invention is for a combined apparatus for screening coal, grain or other
similar material, filling the screened material into sacks, weighing the same, lifting
the sacks (when full) to a suitable height for placing on a man's back, and for
storing the siftings or directing them into a convenient position for removal.
The apparatus consists of a light framework preferably constructed of wrought
iron angle bars, suitably stayed and placed on wheels so as to make it portable;
at the top of the framing I place a suitable screen or grating, fixed at an angle
which may be easily adjusted to suit the material (say coal) to be screened; the
coal is thrown on to the upper end of the screen, that which will not pass through
the screen slides down into a sack supported against the side of the machine, the
mouth of the sack being held open by suitable mechanical means, the sack also
rests on a weighing machine, so that the weight of coal in the sack can be
ascertained: When filled the sack is lifted by means of a suitable lifting frame,
guided by the side of the framing of the apparatus, by means of a winch fixed in
the framing, a ratchet wheel and pawl holding it at the required height until
removed on a man's back or otherwise. The siftings passing through the screen
fall into a hopper and may be stored or passed by means of a shoot to one side
clear of the apparatus.
Dated this 6th day of November 1891.
1
GEO. MITCHENALL.
COMPLETE SPECIFICATION.
An Improved Portable Screen, Sackholder, Sacklifter, and Weighing
Machine for Coal, Grain, or similar Material.
GEORGE MITCHENALL 246 Gipsy Road West Norwood London S.E.
Sanitary 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 :-
My invention is for a combined apparatus for screening coal, grain or other
similar material into sacks, weighing the same, lifting the sacks (when full) to a
suitable height for placing on a man's back and for stowing the siftings or directing
them into a convenient position for removal.
For the purpose of more fully explaining the nature of this invention I append
hereto a sheet of drawings in which
Fig. 1 is an elevation and Fig. 2 an end view of the complete machine.
The apparatus consists of a light frame work A preferably constructed of mild
steel bars, suitably stayed and placed on wheels B, so as to make it portable; at
the top of the framing I place a suitable screen or grating C fixed at an angle
which may be easily adjusted to suit the material (say coal to be screened; the
coal is thrown on to the upper end of the screen, the shoot D guiding it and pre-
venting any falling over; the screened coal slides down the screen Cinto a sack
supported at the side of the machine, the mouth of the sack being held open by
suitable mechanical means such as the ring and hooks E the bottom of the sack
Price Bd l
•

page_text: rests upon a suitable weighing machine F so that the weight of the coal in the sack
can be ascertained; when filled to a suitable weight the sack is lifted by means of
a suitable lifting frame G guided by the sides of the framing A, the lifting is
performed by means of a whinch H which is also provided with a ratchet wheel
and pawl for the purpose of holding the sack at the required height until removed
on a man's back or otherwise. The siftings passing through the screen C fall into
the hopper I and may be stowed therein or passed by means of a shoot J, to one
side so as to be clear of the apparatus.
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 :-
1st. The construction and arrangement of a combined machine for screening,
sack filling, weighing and sack lifting as described and illustrated in Figs. 1 and 2
of the accompanying drawing.
1
1001
GEO. MITCHENALL.