Improvements in the Construction of Metallic Fire-proor Elevator Casings.
Year: 1886

page_text: Date of Application, 18th Mar., 1886.
Complete Left, 18th Dec., 1886.
Complete Accepted, 18th Jan., 1887.
Improvements in the Construction of Metallic Fire-proor
Elevator Casings.
I JOHN DEMPSTER of the Gas Plant Works, Newton Heath Manchester in the
County of Lancaster, Engineer do hereby declare the nature of this Invention to be
as follows:
My said Invention has reference to the casings of elevators for elevating grain,
flour, seeds and other cereals or substances and in particular to fire-proof or fire
resisting elevator casings made of sheet metal plates. In constructing for example
a single elevator casing according to my invention I form rectangular flanges on each
side or edge of two of the four plates usually composing the casing. These flanged
plates form opposite sides of the elevator casing and the remaining two plates which
have straight edges are placed upon the flanges and united thereto at the several
corners by means of clips made by bending a strip of sheet metal into a Ụ shape the
rounded bottom of the said U shaped clip being preferably enlarged into a hollow bead
which gives additional strength and improved appearance to the clip connection.
I might however make this U clip without such an enlarged or beaded back. The
said clips are made in suitable lengths and are slipped over the united flanges and
straight edges of the plates to be connected so as to hold them firmly together. To
give additional security to the joint I insert screws, bolts or rivets through both
plates and clips, the said fastenings being placed at suitable distances apart. These
additional fastenings may however be dispensed with. In constructing metallic
elevator casings secured together by my improved means I prefer that the plates
shall break joint the various sections thus lapping one into the other whereby I obtain
greater stiffness in the structure. An advantage of my improved method of securing
the plates together is that in the event of a plate or any portion or section of the
elevator casing being damaged or requiring renewal or repair, or access being required
to the interior of the elevator casing any one or any number of the clips can be with-
drawn and a portion of the elevator casing removed or replaced without disturbing

page_text: the other sections. Although I have described a single elevator casing I wish it to be
understood that my improved fastening can be employed to secure together the
sections of elevators containing two, three or any greater number of compartments.
Where a partition is introduced in a casing the adjacent plates on each side are
flanged and abut on the straight margin of the partition the three thicknesses being
held together by a clip of my improved form. As my invention relates more
particularly to the clip or fastening for securing the joints of the respective plates and
sections together it will be evident that the arrangement, disposition and formation of
the plates and the flanges thereon might be variously modified so long as the method
of making the joint by my improved means is adhered to.
BUTTON & FULTON,
1, St. James Square, Manchester,
Agents.

page_text: Elevator Casings.
I JOHN DEMPSTER of the Gas Plant Works, Newton Heath, Manchester in the
County of Lancaster, Engineer, do hereby declare the nature of the said Invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement and accompanying drawings:
My said Invention has reference to the casings of elevators for elevating grain,
flour, seeds and other cereals or substances and in particular to fire-proof or fire-
resisting elevator casings made of sheet metal plates.
And in order that my said invention may be properly understood I will now proceed
more particularly to describe and ascertain the system, mode or manner of carrying
the same into practical effect reference being had to the annexed sheet of drawings
and to the letters and figures marked thereon.
In constructing for example a single elevator casing according to my Invention
and as shown at Figs. 1 and 2 of the drawings I form rectangular flanges a on each
side or edge of two of the four plates b, c, d, e usually composing the casing. These
flanged plates b, c, form opposite sides of the elevator casing and the remaining two
plates d'and e which have straight edges are placed upon the flanges and united
thereto at the several corners by means of clips f made by bending a strip of sheet
metal into a shape the rounded bottom of the said U shaped clip being preferably
enlarged into a hollow bead (as shown in the drawings) which gives additional
strength and improved appearance to the clip connection. I might however make
this clip without such an enlarged or beaded back. The said clips are made in
suitable lengths and are slipped over the united flanges and straight edges of the
plates b, c, d, e, to be connected so as to hold them firmly together. To give
additional security to the joint I insert bolts g or it might be screws or rivets through
both plates and clips as shown more clearly to an enlarged scale at Fig. 5 the said
fastenings being placed at suitable distances apart as shown at the side view Fig. 2.
These additional fastenings may however be dispensed with. In constructing metallic
elevator casings secured together by my improved means I prefer that the plates
b, c, d, e, composing the sides shall break joint, the various sections thus lapping one
into the other whereby I obtain greater stiffness in the complete structure. An
advantage of my improved method of securing the plates together is that in the event
of a plate or any portion or section of the elevator casing being damaged or requiring
renewal or repair, or access being required to the interior of the elevator casing, any
one or any number of the clips can be withdrawn and a portion of the elevator casing
removed and replaced without disturbing the other sections. Although I have
described a single elevator casing I wish it to be understood that my improved
fastening can be employed to secure together the sections of elevators containing two,
three or any greater number of compartments. A double elevator casing that is to
say a casing containing two conduits side by side is shown in section at Fig. 3 and a
portion of the same in elevation at Fig. 4 of the drawings. At the point where the

page_text: partition his introduced in the casing the adjacent plates b and c on each side are
flanged and abut on the straight margin of the partition h the three thicknesses being
held together by clips of my improved form. As my invention relates more
particularly to the clips or fastenings for securing the joints of the respective plates
and sections together in the manner described it will be evident that the arrangement,
disposition and formation of the plates and the flanges thereon might be variously
modified so long as the method of making the joint by my improved means is
adhered to.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In the construction of elevator casings for the indicated purposes securing
together the plates composing the casing by means of a U or similarly shaped clip
which is slipped over the united straight and flanged edges of the plates composing
the casing so as to unite and hold the plates together substantially as herein before
described and shown.