Year: 1888

page_text: Date of Application, 3rd Apr., 1838
Specification Accepted, 8th June, 1888
I, THOMAS BAILEY of the City County and State of New York United States of
America Plumber do hereby doclare 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 :-
My invention consists of an improved contrivance of sheet iron plates, metallic stays
or posts and fire clay or other equivalent plaster in a simple efficient and economical
arrangement for fire proof partitions ceilings, roofs and floors if desirable of buildings
as hereinafter fully described reference being made to the accompanying drawing in
which:
Fig. 1 is a transverse section of a partition constructed according to invention.
my
Fig. 2 is a perspective view partly in skeloton and partly in complete form.
I take thin sheet iron preferably of suitable length for the height of the partition
after being prepared and of approved width and bend it forward and back ward
transversely, so as to form the alternate dove-tail grooves a, and ribs b, for stiffening
the plates laterally and also for adapting them to receive and permanently hold a
covering of fire proof cement or plaster c, of approved kind on each side, and
through each sheet suitably perforated for the purpose previous to bending, I fit
one or more metallic stays or posts d, lengthwise of the sheet for increasing the
lateral rigidity and for the supporting studs of the upper floor beams e, when
These
required, and also for the supporting joists of the roofs or ceilings.
stays may bo of solid rolled iron, if desired; but I shall prefer to use common gas
or steam pipe as being much lighter and cheaper for equal strength, and will fit
them with the common coupling flanges f, at the ends when they are to support
upper floor beams.
When the structure is to be used for ceilings the flanges will serve for connecting
the joist rods to the sills or beams of the frame.
The sheets will be lap jointed at the edges as indicated at g, for connecting and
extending the several sheets of the partitions the breadth of the rooms, and will be

page_text: cut, and some of the stays will be shortened for inserting doors as shown at h, and
the door frames, will be cased over the edges of the sheets so as to be held in
position thereby instead of the usual studs the frames being nailed if desired to wood
cleats j, fitted into and held by the dove tail grooves.
The base board k, may also be nailed on to and be hold by such cleats. For ceilings
the plastor coating noed only be placed on one side, but may be applied to both sides
if desired.
In constructing these partitions they may be made first, including the plaster and
be put up afterward to advantage, or after inserting the stays the skeletons may be put
up and then be plastered.
Having now particularly (lescribed and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1st. The combination in a fire proof roof partition or ceiling of the reversely bent
and alternately dove-tail ribbed and grooved metallic sheets, the metallic studs of
the partition or supporting joists of the ceiling inserted through the sheets trans-
versely to the ribs and grooves and fire clay or other plaster coating substantially
as described.
2nd. The combination for a fire proof roof partition or ceiling of the reversely
bent and alternately dove-tail ribbed and grooved metallic sheets, metallic studs of
the partition or supporting joists of the ceiling inserted through the sheets trans-
versely to the ribs and grooves, end flanges of the studs, and fire clay or other plaster
covering substantially as described.
PHILIP M. JUSTICE,
Associate Agent.