Improved Means or Appliances for Use in the Erection of Walls of Concrete or like Material.
Year: 1887

page_text: Date of Application, 21st July, 1887.
Specification Accepted, 27th Sept.. 1887.
Improved Means or Appliances for Use in the Erection of Walls of
Concrete or like Material.
I, CHARLES ARTHUR FITZHERBERT GREGSON, of Marine Villa, Milford Haven, in
the County of Pembroke, South Wales, Civil Engineer, 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:-
This invention relates to improved means or appliances whereby planks or legs can
be temporarily fixed in front of the face of a wall under construction so that such planks
or legs will serve to support and hold in place during the deposit of concrete or the
like, longitudinal planking or shutters as hereinafter explained.
Referring to the accompanying illustrative drawings,
Fig. 1 represents an elevation of a length of concrete wall, with legs and planking
or shutters temporarily fixed in position to admit of the wall being increased in
height.
Fig. 2 represents a transverse section of the wall showing the mode of fixing the
legs in position.
Fig. 3 shows in plan to a larger scale a metal box or holder with a bolt for securing
the same to a wall, and in section part of a log with keys or wedges for tightening
and retaining the same within the box or holder.
Figs. 4 and 5 are respectively a side and a front elevation of the parts shown in
Fig. 3.
A, A, A, are metal boxes or holders that may be constructed of cast iron and in
which the legs B, B, B, are tightly gripped by means of wedges C.
Each box is provided with lugs A¹ having holes therein through which is passed
a screw bolt whereby the box is temporarily fastened to the lower or completed
portion of the wall, for which purpose the bolt is in the example illustrated passed
through a wooden box or lining built into or otherwise fixed in the wall as is shewn
in Fig. 2.
The manner of applying the T headed bolts for this purpose is shewn in detail in
Figs. 6 and 7. The wood lining or box built into the wall shows a rectangular
opening of which the length is considerably more than the width. The T head of

page_text: the bolt is passed into the opening in the sense of its length, and is turned behind the
inner edges of the box or lining so as to form a firm hold against the pull of the nut
attaching the cast iron box.
E* is a block or packing of suitable material such as wood interposed between each
box A and the adjacent part of the wall to maintain the leg B at a suitable distanco
away from and parallel with the face of the wall. F is a shutter (or shutters) secured
in place at the lower side by wedging in between the legs and a completed part of the
wall and at the upper side by being wedged between the legs and metal dogs G.
H, H, are intermediate wedges of hard wood.
As the work of building the wall proceeds and successive lifts of concrete have been
put in as shown at a, b, c, d, Fig. 2, other boxes or holders A are fixed in suitable
positions as at a, a, Fig. 2.
The wedges
C are loosened from the lower boxes when required, and the legs are
raised through the upper boxes, and then fixed in place to hold shutters as required
for the new lifts of concrete and so on.
Although I consider cast iron to be the best material for the boxes or holders and
the form I have given them in the drawings as the most suitable, I do not confine
myself to that material or to the exact form shown; so long as the boxes or holders
and means for securing the same be such that the boxes or holders can be readily
secured in place from the outer side of the wall substantially in the manner as
described.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is:
1. My improved means or appliances for use in the erection of walls of concrete
or like material, substantially as described above with reference to the drawings
annexed.
2. For the purpose of fixing a leg or plank for use in the erection of a wall of
concrete or like material, a box or holder secured to a wall substantially in the manner
hereinabove described.