Improvements in or connected with Scaffolding.
Year: 1891

page_text: Date of Application, 12th Feb., 1891
Complete Specification Left. 12th Nov., 1891-Accepted, 12th Deo., 1891
PROVISIONAL SPECIFICATION.
Improvements in or connected with Scaffolding.
1, WILLIAM PARSEY of 40 Sandbourne Road, Brockley in the County of Kent,
Civil Engineer, do hereby declare the nature of this invention to be as follows:-
Scaffolds to support steam cranes or other lifting apparatus used for the erection
of buildings and other structures (as well as ordinary scaffolding) are usually made
of timber consisting of verticals connected together by horizontal bars and diagonal
bracing which occupy much space, and when the buildings or other structures are
finished the materials of which the scaffoldings are composed are greatly reduced in
value and almost worthless.
Now according to my invention I construct scaffolds of iron or steel bars of
various forms such as angles, tees, channel, tubes, or of other suitable forms or
shapes, all the parts or pieces of which are interchangeable in their relative positions
and have holes drilled or punched in them at some uniform pitch throughout, or
are provided or formed with equivalents therefor, so that they can be put together
by bolts and nuts, cotters, or drifts, or the like, to form pillars, girders, or other
forms with the distance and diagonal bracing bars so as to form perfectly rigid
columns or structures of various dimensions.
When the permanent building or structure is completed the temporary scaffolding
will be taken down and the various parts used over and over again for other
temporary scaffolds.
Deted this Twelfth day of February 1891.
WILLIAM PARSEI
COMPLETE SPECIFICATION.
Improvements in or connected with Scaffolding.
I, WILLIAM PARSEY of 40 Sandbourne Road, Brockley, in the County of Kent
Civil Engineer do hereby declare the nature of this invention to be particularly
described and ascertained in and by the following statement:-
Scaffolds to support steam cranes and other lifting apparatus, used for the erection
of buildings and other structures (as well as ordinary scaffolding) are usually made
of timber, consisting of verticals connected together by horizontal bars, and diagonal
bracing which occupy much space and when the buildings or other structures are
finished the materials of which the said scaffoldings are composed are so greatly
reduced in value as in many cases to be almost worthless.
Now according to my invention I construct scaffolds of iron, steel or other metal
bars of various sections, whereof all the parts or pieces of which are interchangeable
in their relative positions, having holes formed therein at any uniform pitch
throughout or at intervals whereby they can be fixed together by bolts, cottars or
drifts or the like to form various scaffold structures of differing sizes and forms
which may be afterwards taken down and the various parts used again & again
for the erection of other scaffolds without their value becoming materially
depreciated.
In order that my invention may be readily understood and easily carried into
effect I will describe the same by reference to Figures 1 to 12 of the accompanying
drawings.
:
Figure 1 shews in elevation a scaffold of suitable design for supporting a derrick
orane, this scaffold being constructed principally of bars, but it is obvious that

page_text: other sections might be employed without departing from the nature of my
invention. The structure is composed of four braced verticals built of a number
of, and flat bars each length of L or flat bar is according to my invention formed
with holes A pierced at uniform pitch throughout, or at intervals. The four
verticals B are shewn in the horizontal section at Figure 1ª and are braced
together at intervals by cross bracing C of ordinary character, that at the top being
formed of such a combination of bars as are calculated to support the weight of,
(for example) the crane there shewn. A detail see Figure 2 shewing a portion of
the structure, drawn to a larger scale than the previous figures clearly shews the
holes A and illustrates the particular construction of the scaffold sufficiently to
enable any persons conversant with structural ironwork to construct same.
Although I have shewn a scaffold Figure 1 with 4 verticals square on plan, yet
the uprights could be placed oblong in either direction or the square could be
made greater or less, or the heights of the cross distance girders could be raised or
lowered, and these variations can be effected by the use of the same or a less
number of bars, or by the addition of other similar bars.
From the foregoing example of this derrick crane scaffold constructed from
interchangeable pierced bars according to my invention it will be evident that other
scaffold structures of varying forms and dimensions may be erected composed of
these interchangeable bars pierced with holes; the hereinbefore described figures
being merely an example of one form of construction and although the various
possible forms would be too numerous to illustrate in all their varieties yet I
will append examples of three structures suitable for erecting bridge girders
roofs &c.
Figure 3 shews an elevation of a scaffold suitable for the erection of bridge
girders or other structures requiring a level platform, and such a scaffold could
when constructed according to my invention be made of any height or length
required. Figure 4 is a similar view of a scaffold suitable for the erection of roofs
or arched girders and Figures 5 & 6 shew in elevation and plan respectively_a
scaffold suitable to carry a derrick crane this scaffold having three verticals. In
the drawings Figures 3, 4, 5, & 6 cross bracing bars are shewn instead of the
arrangement as in Figure 1 but either plan may be adopted according to
circumstances.
With respect to the jointing of the various parts or pieces all the latter being
pierced with holes as before described, the holes in one part may always be brought
to coincide with the holes in the adjacent part or piece and bolts, cottars, drifts, or
the like may be passed through the holes and the parts or pieces thus secured
together, or in some cases cover plates or bars may be employed. At Figures 7
to 12 are shewn some examples of different modes of connection of bars formed
with coinciding holes, according to my invention. Figures 7 & 8 shew vertical and
horizontal members formed of angle bars the latter overlapping each other.
Figure 9 shews two angle bars abutting with an internal cover bar. Figure 10
shews 2 tee bars, the ends being made to break joint. Figures 11 shew in front
and side elevation a channel bar with a cover bar on the back.. Figure 12 shews &
method of connection where the ends of the bars do not meet. Similar connections
to those shewn could be made with any other or suitable section of bar.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed I declare that what I
claim is
First. In scaffolding, the use and employment of metal. bars of suitable sections
having holes formed therein at an equal pitch or distance throughout, or at intervals,
connected together by bolts, drifts or the like whereby I am enabled to utilize the
same parts or pieces to erect various scaffold structures of differing forms and
dimensions all substantially as herein described.
Second. In scaffoldings the particular constructions thereof when formed of metal

page_text: bars having holes therein at an equal pitch or distance throughout or at intervals
all substantially as herein described and illustrated with special reference to
Figures 1 to 6.
Third. The general construction, combination and arrangement of the parts
composing my improvements in scaffolding all substantially as described and
illustrated with reference to the accompanying drawings together with any mere
modification or modifications thereof.
Dated this 12th day of November A.D. 1891.
WILLIAM PARSEY.