Improvements in Staircases Constructed Wholly or Partially of Metal..
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Staircases Constructed Wholly or Partially
of Metal..
We, EDWARD WOOD & Co. LIMITED, of the Ocean Iron Works, Ordsal Lane,
Manchester, in the County of Lancaster, Iron Bridge and Girder Manufacturers,
and HENRY PRICE BUTLER, of 107, New Park Road, Salford, Manchester, afore-
said Works Foreman, do hereby declare the nature of this invention to be as
follows:-
Our said invention relates to staircases constructed wholly or partially of metal.
Prior to cur invention such staircases have been constructed of cast or wrought
iron and have been cumbersome, heavy and liable to breakage.
.
The object of our invention is to construct a metallic staircase which shall be
strong and durable, comparatively light in weight and with non-slipping treads.
To effect this we form the treads from comparatively thin pressed steel, the
surface being provided with suitable projections corrugations or the like pressed
out of the metal so as to form a non-slipping surface. We employ the usual
or suitable side pieces or "stringers" to which the treads are secured. The
tread is turned down or flanged at each end by means of which it is rivetted or
bolted to the stringers." The space between each step or tread may be entirely
unenclosed or it may be partially enclosed by plates at each end of the tread
formed at right angles thereto so as to connect each end of the tread with the one
below. These end plates may be rivetted to the thread or be formed out of the
same piece of metal. In some cases again the space between the treads may be
entirely enclosed by means of a riser of a plain or ornamental metallic plate
bent at right angles to the non-slipping tread. To effect this for convenience of
construction we form each tread, in addition to the turned down end flanges by
which they are secured to the "stringers," with a short upturned flange and a
downwardly projecting "riser" at right angles to the tread and of a depth about
equal to the height of the step. When placed in position the ** riser
is rivetted
or bolted to the short upturned flange on the lower step so that the space between
the treads is entirely enclosed.

page_text: 1
Improvements in Staircases Constructed Wholly or Partially
of Metal.
We, EDWARD Woon & Co. LIMITED, of the Ocean Iron Works, Ordsal Lane,
Manchester, in the County of Lancaster, Iron Bridge and Girder Manufacturers,
and HENRY PRICE BUTLER, of 107, New Park Road, Salford, Manchester, afore
said Works Foreman, 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 and accompanying drawings:--
Our invention relates to staircases constructed wholly or partially of metal.
Prior to our invention such staircases have been constructed of cast or wrought
iron and have been cumbersome, heavy, and liable to breakage.
The object of our invention is to construct a metallic staircase which shall be
strong and durable, comparatively light in weight, and with non-slipping treads.
To effect this, we form the treads from comparatively thin pressed steel the
surface being provided with suitable projections, corrugations, or the like,
pressed out of the metal so as to form a non-slipping surface. The pressing of
the projections, corrugations, or the like, adds considerably to the strength of the
thin steel plates from which the treads are formed.
In order that our invention may be fully understood we have attached hereto
a sheet of explanatory drawings to which we will refer.
Fig 1 shows in cross section one form of a staircase tread constructed in
accordance with our invention.
Fig. 2 is a plan view thereof, broken in length for want of space, showing
portions pressed out in relief to afford a non-slipping tread.
Fig. 3 is a cross sectional view on a smaller scale showing the various methods
of applying our invention.
Fig. 4 is a front elevation of Fig. 3.
"
In constructing a staircase in accordance with our invention we form the stair
or tread from comparatively thin steel pressed to the required shape. A simple
form of such tread is shown in Figs. 1 and 2. The pressed steel tread a is formed
with turned down or flanged ends by means of which it is bolted or rivetted
to the usual side pieces or stringers". The front portion of the tread a is
also turned down or flanged at a' so as not to present a sharp edge to the foot
although this flange a¹ may be dispensed with if desired. The tread a is also
formed with projections or corrugations of any suitable pattern or shape pressed
out of the steel plate which may be of any suitable thickness, so as to afford a
non-slipping surface. The staircase when formed from steps or treads as shown
in Figs. 1 and 2 has the space between etch step entirely unenclosed as shown
at c in the upper part of Figs. 3 and 4. If desired however the space between
each step or tread may be partially or wholly enclosed.
In Figs. 3 and 4 we show at f the space between the treads partially enclosed.
This is effected by means of side plates y bolted or rivetted to the flanged portion h
of the upper and lower treads.
At i Figs. 3 and 4 instead of having separate plates g, the space between the
treads is partially enclosed by means of the metal of the tread itself. In some
cases the space between the treads is wholly enclosed as shown in the bottom
portion of Figs. 3 and 4.
To effect this we form the tread a with a "riser" or plate & bent at a right
angle to the tread a. In addition to such "riser "k the treads are provided with
a short upturned flange to which the "riser kis bolted or rivetted as plainly
shown in the drawings.
23

page_text: The "riser" k may be a plain sheet of steel, as shown in the left hand of
Fig. 4, or, as shown in the right hand of Fig. 4, the riser k may be formed with
an ornamental pattern.
and
The treads risers may be strengthened or ornamented by the pressing of
or
any suitable ornamental or other pattern or design thereon,
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what we
claim is:-
In staircases constructed wholly or partially of metal, forming the treads of
such staircases from pressed steel plates with non-slipping surfaces the spaces
between the treads being left open, or partially, or wholly enclosed, in the manner
and substantially as described and shown.
Dateu THIS day of August 0.
For the Applicants,
E. K. DUTTON & Co.,
Chartered Patent Agents,
5, John Dalton Street, Manchester and 3, Yorkshire Street, Rochdale.