Improvements in Scaffolds for Buildings.
Year: 1896

page_text: Date of Application, 21st Mar., 1896-Accepted, 13th June, 1896
COMPLETE SPECIFICATION.
Improvements in Scaffolds for Buildings.
1, PETER JENSEN, of 77 Chancery Lane, London, Chartered Patent Agent,
lo hereby declare the nature of this invention (a communication to me from abroad
by the Firm of Kaufmann & Heiland, of Charlottenburg, near Berlin, Germany,
Scaffold Manufacturers,) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention refers to scaffolds used for painting, washing or otherwise operating
on the outside walls of houses or other buildings. In the accompanying drawing are
shewn several constructions for carrying out the invention.
Fig. 1 is a, vertical part sectional side elevation applied to the outside of a house
Fig. 2 a front view.
ig. 3 is enlarged part sectional side view of upper part of Fig. 1, and Fig. 4 a
more enlarged part of same.
fig. 5 shews a detail part for fixing the scaffold to a part of the building where
re is a window.
Fig. 6 shews a modified means for fixing and Fig. 7 a plan section of same on
cxx.
Fig. 8 is a side view and Fig. 9 a plan of a detail.
Fig. 10 is a side view of a detail.
Fig. 11 is a perspective view of part of scaffold.
Fig. 12 is a front view, Fig. 13 a side view and Fig. 14 a plan section of a
detail.
Figs. 15, 16 and 17 are detail views, and Fig. 18 a perspective view shewing its
application, a modification of Fig. 11.
Figs. 19, 20 and 23 illustrate a modification of Figs. 1 to 4.
Figs. 21 and 22 shew another form of the fixing illustrated by Figs. 8 and 9.
The scaffold Figs. 1 and 2 is made with vertical ladders a which are fixed
together by slanting struts b. The ladders a are here shewn set vertically.to the
front of the house or wall which is to be operated on. In the height the ladders
are united to each other by screws c and straps -c e Figs. 6 and 7. The ladders.
are on the side towards the house provided with horizontal girders d lashed thereto
and serving chiefly to the fixing of the scaffold to the wall. In the places of the
atter where there are no windows boards e are fixed by screws to the ladders,
Figs. 1, 3 and 4, and these boards are provided with hooks which hook into
ooks g that are fixed in wooden plugs i driven into the wall h. These plugs are
ixed in the following manner. In the wall is first formed a hole k that is gradually
videning towards the inside. Before the plug i is driven in, a wedge is inserted
n it. This wedge is best made cross shaped to suit a cross shaped recess in the
nner end of the plug, and which may best be made by means of a chisel. The
nner end of the plug will be widened out when it is driven into its recess in the
vall and cannot after that either turn round or move endways.
In places where there are windows in the wall the following mode of fixing is
dopted; by means of a screw n, Fig. 5, a board o, Figs. 6 and 11 is fixed in the
vindow opening and to the board the girder d is fixed by means of a hook
crew p.
The platform boards q, Figs. 1, 2 and 3, rest on light and strong brackets formed
s follows. A horizontal bolts with head' is passed through holes r in the ladder.
Over the end of the bolt is passed through the eye t' of a rod t, the other end

page_text: of same being put into a hole u of the ladder. The eye t¹ is then fixed on the
rods by a set screw t³..
9
The boards instead of resting on brackets may rest on the rungs of the ladders
as shown in dotted chain lines in Figs. 1 and 2. In that case the ladders a would
be brought closer to the wall.
The ladders a may as shewn in Fig. 23 be placed parallel with the face of the
wall. In that case the bolts are passed through holes in the sides of the ladders
from front to back, aud the ladders have also holes for the ends t' of the rod t.
The slanting struts b (Fig. 2) may or may not be provided in this form of
.scaffold.
From Figs. 15, 16 and 17 it will be seen that hooks p p may be applied to the
boards o for fixing the ladders directly thereto. For this purpose the board o is
provided with a slot o'. Fig. 17 shews the girder d fixed to the board o.
According to Figs. 21 and 22 the wedge in the plug i may be pentagon.
Figs. 12, 13 and 14 shew how the ladders are prevented from shifting sideways
to each other by means of the straps c' and from shifting endways by means of the
double hooks u².
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondents, and in what manne
the same is to be performed, I declare that what I claim is :-
1. Ladder scaffolding consisting of ladders a set at right angles to the surface
the wall united by diagonal struts b girders d and platform boards 7 resting on
rungs of the ladders, and suitable means for fixing the scaffolding to the wa
substantially as described with reference to Figs. 1 and 2.
2. Ladder scaffolding consisting of ladders a set at-right angles to the surfac
of the wall, united by diagonal struts b girders d and platform-boards girosting o
brackets st, and suitable means for fixing the scaffolding to the wall, substantially
as described with reference to Figs. 1 to 4.
3. Ladder scaffolding consisting of ladders a set parallel with the surface of the
wall, united by platform boards 9 resting on brackets st, and suitable means for
fixing the scaffolding to the wall,, substantially as described with reference to
Fig. 23.
4. The brackets consisting of the bolts s passing through the sides of the ladder
and the struts t with ends t entering holes in the said sides substantially as described
with reference to Figs. 3, 4 and 6.
5. The means described for fixing the scaffold to the wall consisting of boards e
secured to the ladders and having hooks f which engage with hooks g that are
screwed into plugs i which are fixed in the wall by means of wedges 1, Figs. 8 and 9,
or wedges 1, Figs. 21 and 22.
6. The constructions of ladder scaffolding shewn on the drawing.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.