Improvements in connection with Fire-proof Floors, Ceilings, Walls, and Partitions.
Year: 1896

page_text: Date of Application, 26th Nov., 1896
Complete Specification Left, 21st Jan., 1897-Accepted, 27th Mar., 1897
Improvements in connection with Fire-proof Floors, Ceilings, Walls,
and Partitions.
I, JOHN JAMES MOFFAT 28 Sampson Road, Camp Hill, Birmingham in the
County of Warwick, Builder do hereby declare the nature of my said invention
to be as follows:-
My invention has for its object improvements in connection with fireproof,
floors, ceilings, walls and partitions by which I greatly simplify the parts and
materially reduce the cost of construction.
In carrying my invention into practice I take a strip of sheet steel or other
suitable metal which may or may not be corrugated, and form one or more slits
at either end by preference two, and in the centre or thereabouts I cut out or form
one or more tongues or pieces. When building fireproof floors this strip of sheet
steel is laid upon the top of the iron girder and the two outer sides of the slitted
ends are turned over and under binding or clipping the strip to the girder. The
centre portion of these ends are then turned upwards and also the centre tongue
or tongues projecting through the expanded metal lathing, wire or other material
which is placed on the top by which means it can be pulled taught from girder to
girder. The centre portions of the ends of the strip & the centre tongue or
tongues may be turned down previous to the concrete or other substance which is
placed over the top for forming the floor.
Dated this 25th day of November 1896.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in connection with Fire-proof Floors, Ceilings, Walls,
and Partitions.
I JOHN JAMES MOFFAT of 28 Sampson Road Camphill Birmingham in the
County of Warwick Builder, do hereby declare the nature of my said invention
and what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention has for its object improvements in connection with fire proof
floors ceilings, walls and partitions by which means I greatly simplify the parts
and materially reduce the cost of construction.
In carrying my invention into practice, I take a strip of sheet steel or other
suitable metal which may or may not be corrugated and from one or more strip<
at either end by preference two, and in the centre or thereabouts I cut out or
form one or more tongues or pieces. When building fire proof floors this strip of
sheet steel is laid upon the top of the iron girder and the two outer sides of the
slit ends are turned over and under the binding or clipping the strip to the girder.
D

page_text: The centre portion of these ends are then turned upwards and also the centre
tongue or tongues projecting through the expanded metal lathing wire or other
material which is placed on the top by which means it can be pulled taut from
girder to girder. The centre portions of the ends of the strip and the centre
tongue or tongues may be turned down previous to the concrete or other substance
which is placed over the top for forming the floor.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto a sheet of drawings upon which
I have illustrated sufficient examples of my improved clip to show the principle of
my invention and also the application of the same.
Figures 1. 2. & 3 are enlarged views showing different methods of forming my
clips which are cut from pieces of sheet steel or other metal.
Figure 4 is a front elevation of Figure 3 shewing the clip ready bent for fixing
into the girder.
Figure 5. is a perspective view shewing the clip attached to the girder G and
holding the expanded metal lathing in position.
Figure 6. is a perspective view shewing the method of attaching the expanded
metal lathing on the inside and outside of the girder.
Figure 7. is a cross section shewing the expanded metal lathing attached in a
different manner.
In carrying my
invention into practice I form my clip A from a strip of sheet
steel or other suitable metal which may or may not be corrugated with two slits a
and a at either end and two short slits a3 and a at either side as shown at
Figure 3. Or instead of forming slits at either side, I may cut the centre portions
so as to form the tongues as and a as shown at Figure 1. or form the tongues a
and as as shewn at Figure 2. I then bend the ends or fingers a a¹0 all and a all
in one direction, and the centre portions a¹³ and a¹ and the tongues or parts or
fingers a¹ and a¹ in the opposite direction as clearly shown at Figure 4. When
forming my clips from malleable iron castings they would not be flat in their
normal condition, but bent as shown at Figure 4.
When building fire proof floors the clip is laid upon the girder G and the ends
or fingers a and a10 are hent under so as to clip one side of the girder and the ends
or fingers all and a clip the other side. The expanded metal lathing B or wire or
other material is then placed in position, the centre portions a¹³ and a" and the
tongues or the parts or fingers a and al projecting through the mesh which is
afterwards pulled taut from girder to girder and then the portions a¹³ and a" and
the tongues or the parts a¹ and at may or may not be turned down as shown at
Figure 5. The concrete or other fire proof material is then laid on the top of the
expanded metal lathing B.
The expanded metal lathing B³ or its equivalent on which the plaster for
forming the ceiling is fixed is attached to the under side of the girders in a similar
manner as herein before described. My clip can be similarly applied to vertical
girders or stanchions for walls or partitions.
At Figure 6 I have shown the expanded metal lathing attached to the under
side and on the inner edge of the girder. In this case the centre portions als
and a are bent in the same direction as the ends so that they pass between the
mesh of the expanded metal lathing B by which means it is held in position. The
expanded metal lathing B' on the under-side being held in position by the tongues
or the parts or fingers a (Fig. 3) and a¹.
At Figure 7 I have shown a further modification. In this case the expanded
metal lathing B and B are held in position as hereinbefore described and on the
underside of the girder I fasten a strip of expanded metal lathing B or its
equivalent by means of the tongues which when secured in position gives it the
appearance of a beam. The space between the metal lathing B and B is wholly
or partly filled with silicate cotton asbestos or other fire resisting material which
adds to its fire resisting qualities, and for deadening the sound which is a great
defect in fire proof floors as at present constructed.

page_text: Having now particularly described and ascertained the nature of my said
invention and what manner the same is to be performed I declare that what
I claim is :-
First. Securing expanded metal lathing or its equivalent to metal joists and
girders by means of clips formed out of one piece of sheet steel or other suitable
metal in the manner and for the purpose substantially as herein before described
and as shown on the accompanying sheet of drawings.
Second. Forming the clips for securing expanded metal lathing or its equivalent
to girders and iron joists out of a piece or strip of sheet steel or other suitable
metal in the manner and for the purpose substantially as herein before described
and as shown on the accompanying sheet of drawings.
Third. The metal clips formed with fingers suitable for turning upwards and
downwards to embrace the girders or joists and also to embrace the expanded
metal lathing and whether made from wrought metal or malleable cast metal as
and for the purpose herein set forth and such as shown upon the drawings.
Dated this 20th January 1897.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent.