An Improved Fire Proof Construction of Casing for Surrounding Elevators in Corn Mills.
Year: 1886

page_text: An Improved Fire Proof Construction of Casing for Surrounding
Elevators in Corn Mills.
We, ROBERT DEMPSTER, and JOHN DEMPSTER of the Newton Heath Gas Plant
Works, Manchester, Lancashire, do hereby declare the nature of our invention for
"AN IMPROVED FIRE PROOF CONSTRUCTION OF CASING FOR SURROUNDING ELEVATORS
IN CORN MILLS and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:-
"
Hitherto the elevators in corn mills which are employed in lifting grain from
one room or place to another have been boxed off by means of a wood casing which
not unfrequently caught fire, in fact so likely are these wood casings to take fire,
that Insurance companies demand a larger premium for that part of the mill where
these elevators worked than the part where they are absent.
We intend to dispense with wood for casing off the elevators, and use metal
plates instead, whereby the casing is made fire proof.
Our invention consists in forming special plates for such purposes and in the
means or method of connecting the said plates together, which we accomplish in
such manner that if anything is wrong with any part of the elevator, any one of
the plates can be easily removed without disturbing the rest of the plates.
In order that our invention may be better understood we have given reference
to the accompanying sheet of drawings wherein Fig. 1 is an elevation of our
improved casing which it will be observed is composed of plates A fastened
together by screws or bolts a. One peculiarity of our invention consists in
building up these casings by means of separate plates which overlap each other as
shewn in Fig. 1, and this is done by commencing with a long plate and a short
plate as shewn at B and C, which plates may be panelled as shewn in the drawings
or left plain. It is not however necessary to commence with a short and long
plate, as the plates may be of equal length and overlap each other at the ends just
sufficient to form a joint.
This method of joining the plates not only gives stability to the structure; but
if it is necessary to remove any one of the plates to examine the elevator, it can be
done without disturbing the other plates.
Fig. 2 shews the means we adopt when connecting together two casings, and
Fig. 3 shews how three or more casings may be connected together side by side.

page_text: In Fig 1, 2, and 3 we have shewn that four separate plates are required to form
the four sides of the casing, but Fig. 4 shews plates cast or formed in such manner
that only two sets of flanges and bolts are required to form four sides.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is
Firstly. The construction of metal elevator casings where the plates forming
such casings are connected together by means of flanges, and overlapping edges, in
manner substantially as herein set forth and shewn in Fig. 1.
Secondly. The construction of metal elevator casings where the plates forming
such casings are double sided as shewn in Fig. 4 requiring only two sets of flanges
and bolts.