Year: 1894

page_text: being date of first Foreign Application (in 2t0h July, 1893
France)
Date of Application (in United Kingdom), 10th Jan., 1894
Complete Specification Left, 22nd Sept., 1894-Accepted, 17th Nov., 1894
Date of Application (in United Kingdom), 10th Jan., 1894
Complete Specification Left, 22nd Sept., 1894-Accepted, 17th Nov., 1894
•
I, AUGUSTE ALEXANDRE CHOCARNE of 40, Rue de Boulainvilliers, Paris,
France, Locksmith, do hereby declare the nature of this invention to be as
follows:-
It is known that plaster does not adhere well to the flanges of iron beams employed
in the construction of buildings, etc., and hence the cracks which so frequently occur
in the ceilings of such structures. In order to obviate this objection, I have devised
the improved construction of girder, which forms the object of the present application
for Letters Patent.
My system of girder is characterized in principle by a series of
grooves upon the
surface of the girder destined to receive the plaster of the ceiling, in order that the
plaster moulded into these grooves shall adhere to the iron as well as to any other
porous or cavitied surface.
My invention will be readily understood with the aid of the accompanying
drawing, in which
Figure 1 represents a cross-section of a girder of I-section, provided with angular
grooves formed in the surface of the flange upon which the plaster is to be applied.
Figure 2 is a perspective view of the same girder.
Figure 3 represents an I-girder having rectangular grooves.
Figure 4 shews the application of circular grooves.
Figure 5 shews rectangular grooves running obliquely.
Figure 6 shews rectangular grooves formed diagonally in two directions, forming
a kind of chequer-work.
Figure 7 shews the flange of the girder provided with cellular cavities.
As seen by the drawing, I make in the flange a of the girder, grooves b which
may be, for example, triangular and disposed either longitudinally, transversely, or
diagonally, or in the form of chequer-work. The grooves instead of being
triangular, as in Figures 1 and 2, may be made rectangular, as in Figure 3, circular
as in Figure 4, or of any other form. In Figure 5 I have represented rectangular
grooves disposed obliquely in the flange of the girder, and in Figure 6 I have shewn
rectangular grooves made obliquely in opposite directions, so as to form a kind of
chess-board pattern. In Figure 7 I have shewn circular cavities or cells c made in
the girder flange. The cells, instead of being circular, may be made of oval,
square, polygonal, or other form. Instead of forming cells, it will be understood
that I may provide the girders with bosses or projections of various shapes. These
projections may even be of dovetailed form.
It is to be understood that my invention may also be applied to angle-irons,

page_text: T-irons with narrow or wide flanges, as well as to beams, bars, etc., of iron, steel,
or cast-iron.
Dated this 10th day of January 1894.
A. A. UTAMA,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
An Improvement in Ceiling Girders.
I, AUGUSTE ALEXANDRE CHOCARNE, of 40, Rue de Boulainvilliers, Paris,
France, Locksmith, do hereby declare the nature of this invention, and in what 1
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
It is known that plaster does not adhere well to the flanges of iron beams
employed in the construction of buildings, etc., and hence the cracks which so
frequently occur in the ceilings of such structures. In order to obviate this 1
objection I have devised the improved construction of girder which forms the object
of the present application for Letters Patent.
My system of girder is characterized in principle by a series of grooves upon the
surface of the girder destined to receive the plaster of the ceiling, in order that the
plaster moulded into these grooves shall adhere as well to the iron as to any other
porous or cavitied surface.
My invention will be readily understood with the aid of the drawing accompanying
my Provisional Specification, in which
Figure 1 represents a cross-section of a girder of I-section provided with
V-grooves formed in the surface of the flange to which the plaster is to be applied.
Figure 2 is a perspective view of the same girder.
Figure 3 represents an I-girder having grooves of rectangular section.
Figure 4 shews grooves of semi-circular section.
Figure 5 shews grooves of rectangular section running obliquely.
Figure 6 shews grooves of rectangular section formed diagonally in two directions,
producing a kind of chequer-work.
Figure 7 shews the flange of the girder formed with cellular cavities.
As seen by the drawing, I make in the flange a of the girder, grooves 6 which
may be, for example, V-shaped in cross-section, and disposed either longitudinally,
transversely, or diagonally of the girder or crossed to form chequer-work. The
grooves, instead of being of V-section, as in Figures 1 and 2, may be made of
rectangular section, as in Figure 3, semi-circular, as in Figure 4, or of any other
form. In Figure 5, I have represented grooves of rectangular section disposed
obliquely in the flange of the girder, and in Figure 6 I have shewn rectangular
grooves made obliquely in opposite directions, so as to form chequer-work. In
Figure 7, I have shewn circular cavities or cells c made in the girder flange. The
cells, instead of being circular, may be made of oval, square, polygonal, or other
form. Instead of forming cells, it will be understood that
may provide the
girders with bosses or projections of various shapes. These projections may even
be of dovetailed form.
It is to be understood that my invention may also be applied to L-angle irons,
T-irons, with narrow or wide flanges, as well as to beams, bars, etc., of wrought or
cast iron or steel.
Having now particularly described and ascertained the nature of the said inven
tion, and in what manner the same is to be performed, I declare that what I
o laim is :-
"
'
1. A girder having formed in one or both of its flanges grooves of angular,

page_text: rectangular, or semi-circular section, as in Figures 1 and 2, Figure 3, and
Figure 4, respectively, whether such grooves run longitudinally, as in Figures 1,
2, 3, 4, or obliquely, as in Figure 5, for the purpose of enabling the plaster or
other coating applied thereto to better adhere to the metal, as specified.
2. A girder having one or both of its flanges formed with crossed grooves or
cavities arranged to produce chequer-work, as in Figure 6, for the purpose
specified.
3. A girder having one or both flanges pitted with cavities, as in Figure 7, or
provided with projecting bosses of dovetail or other form, as specified.
Dated this 21st day of Sentember 1901.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.