A Portable Ceiling to be used in Combination with and Adjustable to the V shaped Roofs of Ordinary Wooden Huts and other like Temporary and Portable Structures.
Year: 1891

page_text: Date of Application, 27th Feb., 1891-Accepted, 4th Apr., 1891
.COMPLETE SPECIFICATION.
A Portable Ceiling to be used in Combination with and Adjustable
to the V shaped Roofs of Ordinary Wooden Huts and other like
Temporary and Portable Structures.
We, WILLIAM LAWRENCE and EDWARD LAWRENCE, trading as G. Tansley
& Co., of 16, Wigmore Street, London, Manufacturers, 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:--
The object of our invention is to provide a portable ceiling of simple construction
to be used in combination with, and adjustable to, the V shaped roofs of ordinary
wooden huts, marquees, and other similar temporary and portable structures.
In carrying out our invention, we place opposite to each other two wooden rails
or bearers of suitable length and dimensions along the underside of the rafters of
the roof at the level of the proposed ceiling. These said rails or bearers extend
from end to end of the building and are suspended to the rafters by means of iron
bolts to cach rafter, one end of which is hooked to catch into a ring provided on
the upper surface of the rail, and the other end of the bolt is screw threaded and is
bent at right angles so as to pass through a hole in the rafter in which position it
is secured by means of a butterfly nut placed on the end of the bolt. Where the
span of the ceiling renders it desirable, an additional rail or bearer is placed between
the above mentioned rails, and the intermediate rail is suspended from the collar tie
of the roof in similar manner to that in which the other are suspended from the rafters
except that the suspension rods are made longer. These intermediate rails may be
used in any number according to the span of the roof. All the rails or bearers
above mentioned are rebated on their upper edges for the object to be hereinafter
explained.
We next place at regular intervals small transverse rails bridging the spaces
between the large rails or bearers, and attached to the longitudinal rails by means
of an ordinary dovetailed joint, the upper surface of the transverse rails being flush
with the bed of the rebate formed on the longitudinal rail. For simplicity of
design we arrange that the transverse rails occur at distances apart equal to the
distances between the large longitudinal rails, so that the final open spaces formed
by the two sets of rails are regular squares.
We now place squares of light framework, over which is stretched paper, canvas
or other suitable material, on the upper surface of the transverse rails and fitting
into the rebates of the large rails, such framework panels being secured in position
by means of ordinary turn buttons which are placed on the top surface of the
large rails.
In order that our invention may be more fully understood we append hereto
the accompanying sheet of drawings in which the like letters of reference indicate
he like parts throughout.
Fig. 1 shews a sectional view of our improved ceiling and
Fig. 2 shews a portion of the plan thereof as seen from above, part with the
ciling squares in position and part showing the bearers or rails.
ail.
A A are the longitudinal bearers or rails and A', is an intermediate longitudinal
BB indicate the transverse rails. CC represent the ceiling panels. D, Dare
he suspension rods by means of which the longitudinal rails A. A are attached to
he rafters, and D' is the longer rod holding up the intermediate rail A. A
ornice E is affixed to the rail A and the rafter by bolts, and the inclined frieze
ining Fattached to the rafters, completes the ceiling.
It will be seen from the above description that the whole of the members of the
eiling are suspended from the members of the roof, the absence of all screws. nails.

page_text: and other like means of attachment, greatly facilitating the operations of placing
the ceiling in position, or removing it for transit. And at the same time the ceiling
tends to strengthen the roof by acting as an auxiliary tic or collar.
The panels C C admit of great variety of treatment, they may consist of light
framework on which is stretched paper canvas or the like, painted or decorated in
any way; or they may consist of light boarded framework, fibrous plaster, or any
other suitable substance.
The suspension members D D' are also capable of variation, they may consist of
chains instead of rods, or any other similar appliances, their use being always to
carry in suspension the other members embodied in our invention.
It will be apparent from the foregoing that we have by means of the devices
herein described constructed a ceiling of a portable and temporary nature, capable
of being used in combination with a temporary building which is covered with the
ordinary V shaped roof, which I believe to have not been previously accomplished
in connection with structures of this description.
As our invention is capable of some modifications without departing from the
principle thereof, we do not restrict ourselves to materials or dimensions, or to the
precise form or placement of the several parts thereof.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
(1) In combination with the V shaped roofs of ordinary temporarily, and portable,
buildings, the portable ceiling as herein described in this Specification and illustrated
by the accompanying drawings.
(2) In combination with portable huts or similar structures, a portable suspended.
ceiling hung from the roof and formed with interchangeable parts, in the manner
hereinbefore described in this Specification and illustrated by the accompanying
drawings.
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1001
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicants.
ICOL