IMPROVED APPARATUS FOR BUILDING IN CONCRETE
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by Joseph Mingay Tall at the Office of
the Commissioners of Patents on the 17th April 1877.
JOSEPH MINGAY TALL, of St. George's Road, Peckham, in the County of Surrey,
Concrete Builder. "IMPROVED APPARATUS FOR BUILDING IN CONCRETE."
The apparatus used for constructing buildings of concrete composed of broken
stone, gravel, or other hard substance mixed with lime and cement, usually consists
of panels of any convenient length (made of wood or metal, or the two materials
combined), arranged in pairs at proper distances apart so as to form a trough or
space to receive the concrete of which the wall is to be composed. These panels
are temporarily attached by their ends to uprights fixed in their proper places,
and the panels are kept a proper distance apart by means of cores, bolts, or other
devices, which are imbedded in or pass through the wall. Apparatus constructed in
this manner is cumbrous, expensive, and inconvenient to manage, and the object of
the present Invention is to obviate these objections. To this end the panels are
composed of three or more boards of any convenient length (from 6 to 18 feet),
combined together by means of short cross pieces which will be in a vertical
position when the panels are in use; and the panels are further strengthened, and
their rigidity is increased by fixing diagonal cross braces at their back. Through
the vertical cross pieces of the panels are made short narrow slots to receive the
ends of flat iron bars, which will connect two opposite panels together in pairs, and
by extending across the space between them will form gauge plates or bars. These
bars are perforated with holes to receive vertical iron rods, made of round, half
round, or triangular iron, one of which rods is placed on the inner side of the panel,
and will consequently be imbedded in the face of the wall when the latter is built.
The other vertical rod is placed on the outside of the panel at a sufficient space from
the cross upright thereon to admit of a cam or wedge piece being inserted between
the rod and the upright on the panel. When this cam or wedge piece is tightened
up or driven home, the inner vertical iron rod will be drawn tight up against the face
of the panel and will securely hold the same in position.
In order to extend the wall in length other panels are connected by their ends by
means of sliding bolts, buttons, or other devices, so as to form a continuous trough
or mould of any suitable length, according to the building to be constructed. In
order to form the corners of the wall the ends of the boards at one end of the

page_text: corner panels are bevilled off so that they will fit against each other, and they may
be further secured by upright bevilled pieces which will fit into the angles and form
a close joint.
It will be found convenient to use two sets of panels, one placed above and resting
on the other, and when the trough is full of concrete, and the latter has properly
set, the lower panels may be removed by drawing up the outside round iron rods
so that the panels may be lifted or drawn off from the flat iron wall bars. Theso
latter may also be drawn out of the wall if the inner vertical rods are raised so as
to relieve them. These wall bars may then be used again for the next lift, for
which purpose they must be placed on the vertical round rods and then the topmost
panels are placed on them. By gradually drawing up the vertical rods and raising
the panels one on the other, the wall may be carried up to any convenient
height,