IMPROVEMENTS IN THE CONSTRUCTION OF METALLIC STAIRCASES
Year: 1882

page_text: LETTERS PATENT to Robert Hudson of Gildersome in the County of York,
Engineer and Ironfounder for an Invention of IMPROVEMENTS IN THE
CONSTRUCTION OF METALLIC STAIRCASES
PROVISIONAL SPECIFICATION left by the said Robert Hudson at the
Office of the Commissioners of Patents on the 30th September 1882.
ROBERT HUDSON, of Gildersome, in the County of York, Engineer and Iron-
founder, "IMPROVEMENTS IN THE CONSTRUCTION OF METALLIC STAIRCASES
29
My invention relates to improvements in that class of staircases which are
constructed entirely of metal.
These improved staircases are intended to form a strong, safe and cheap
substitute for the, usual wooden or stone structures in situations where the "treads ">
are subject to considerable wear and tear, and by their lightness are easily and
expeditiously erected or removed.
"
.
My improvements consist in forming the "risers" and ", treads" of metallic
plates, each plate being long enough to form at least one "riser" and one "tread,"
but several pairs of "risers" and "treads may be comprised in one plate. The
plates having been bent to the required form are bolted or rivetted together, by,
preference, in accordance with the system of bevil jointing described in the
specification of Letters Patent granted to me, N° 3782, dated, September 25, 1878,:
or the said parts may be joined by any other convenient method.
The said plates constituting the "risers" and "treads" are, then secured at their
ends by rivetting or otherwise to string bars or stringers of suitable section which
run in the direction of the flight of the steps, and are joined to the upper and
lower external angles thereof. The spaces between the said string bars are open,
which gives a light and neat appearance to the flight. The said spaces or
openings, if desired, may be closed by light metallic material either plain or
ornamental, or in lieu of the aforesaid string bars at each end of the "risers" and
"treads," stringers the full depth of the steps may be used.
When desirable the stairs thus formed may be enclosed within the walls of a
building as is usual in some cases.
The metallic plates of which the said "risers" and "treads" are composed may,
be formed, by, being passed through suitably shaped rollers, or by male and female
dies of the desired configuration, one of which may be actuated by suitable
gearing, or levers or by hydraulic or steam pressure, or they may be bent to form
by other suitable apparatus.
3
>

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Hudson in the Great Seal Patent Office on the
28th March 1883.
1
..
ROBERT HUDSON of Gildersome in the County of York, Engineer and Ironfounder,
"IMPROVEMENTS IN THE CONSTRUCTION OF METALLIC STAIRCASES
"
My invention relates to improvements in that class of staircases, which are
constructed entirely of metal.
These improved staircases are intended to form a strong, safe, and cheap
substitute for the usual wooden or stone structures in situations where the "treads
are subject to considerable wear and tear, and by their lightness are easily and
expeditiously erected or removed.
My improvements consist in forming the "risers" and "treads" of metallic
plates, each plate being long enough to form at least one "riser" and one "tread," but
several pairs of risers and treads may be comprised in one plate. The plates having
been bent to the required form, are bolted or rivetted together, by preference in
accordance with the system of "bevil jointing". described in the specification of
Letters Patent granted to me No 3782, dated September 25, 1878; or the said parts
may be joined by any other convenient method.
The said plates constituting the risers and treads are then secured at their ends
by rivetting or otherwise to string bars or stringers of suitable section which run
in the direction of the flight of the steps and are joined to the upper and lower
external angles thereof. The said openings, if desired may be closed by light
metallic material either plain or ornamental, or in lieu of the aforesaid string bars
at each end of the risers and treads, stringers the full depth of the steps may be
used. When desirable the stairs thus formed may be enclosed within the walls of
a building as is usual in some cases. The metallic plates of which the said risers
and treads are composed may be formed by being passed through suitably shaped
rollers or by male and female dies of the desired configuration, one of which may
be actuated by suitable gearing or levers, or by hydraulic or steam pressure or
they may be bent to form by any other suitable apparatus.
.
In the accompanying drawings like parts are marked with the same letters in
the several views in which such parts appear. Figs. 1, 2, and 4, are side elevations
of portions of metallic staircases according to my invention, in which a, and b, are
respectively the upper and lower "stringers" which by preference I make of
angle or L shaped- metallic bars, c, are the parts called "risers," and d, the parts
called "treads." In Fig 1, a riser and tread are shewn to be formed from or out of
one metallic plate. In Fig. 2, a number of risers and treads are shewn to be
formed from or out of one metallic plate. In Figs. 1; and 2, the junction between
a tread and a riser and with the stringer b, is made at the internal angle e, and at
the "nosing" or external angle f, with the string-bar a, by means of rivets, or
screws or bolts and nuts, a³, are the openings between the said string bars
previously referred to. Fig. 3, is a partial front view of Figs 1, 2, and 4, shewing
the junction of the steps (risers and treads) with the stringer bar a, at f, and with
each other at e¹. Fig. 4, shews another form of riser and tread made from one
plate, and joined to other risers and treads at or about the middle of the risers,
shewn at e, the junction of the said risers and treads with the stringers a, and b,
being similar to that shewn and described with reference to Figs 1; and 2. Fig. 5,
shews in sectional elevation a portion of a metallic staircase in which the
stringers A¹, are formed of metallic plates the full depth of the steps, and may be
either plain or ornamental, the steps (that is, the risers and treads) may be formed

page_text: in accordance with those described with reference to Figs. 1, 2, 3, and 4, inclusive,
or as shewn in Figs 5, and 6, (Fig. 6, being a front view of Fig. 5) wherein a
riser and tread are shewn to be made from one plate and joined to others at the
internal angle e', by the method of bevil-jointing previously referred to, these steps
are joined to the stringer plates a¹, by means of knees g, and. rivets, screws, or
bolts and nuts.
.
Having now described the nature of the said invention and the manner of
carrying the same into practical effect, I would have it understood that what I
consider to be novel and original and therefore claim as secured to me by the
Letters Patent herein before first in part recited is
The improved metallic staircases constructed as hereinabove described with
reference respectively to and shewn in Figs. 1, and 3, in Figs 2, and 3, in Fig. 4,
and in Figs. 5, and 6, of the accompanying drawings.
In Witness whereof, I, the said Robert Hudson, have hereunto set my hand
and seal this Twentyseventh day of March, in the year of our Lord One
thousand eight hundred and eighty three.
Witness to the signature of
the said Robert Hudson
THOS E. CRAVEN, C.E.
Fel. Inste of Patent Agents.
24 Victoria Chambers
Leeds.
ROBERT HUDSON (L.S.)