Improvements in Metallic Ceilings and in Metallic Plates adapted for use in same.
Year: 1892

page_text: Date of Application, 20th Dec., 1892-Accepted, 28th Jan., 1893
COMPLETE SPECIFICATION.
Improvements in Metallic Ceilings and in Metallic Plates adapted
for use in same.
I, LONGLEY LEWIS SAGENDORPH, of the corner Hamilton and 23rd Streets
in the City and County of Philadelphia, State of Pennsylvania, United States of
America, Inventor and Sheet-metal Manufacturer, 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, reference being had to
the accompanying drawing :-
The primary object of my invention is to construct or form the corners of
metallic ceiling plates (having raised marginal borders or mouldings) in such a
manner as to obviate the necessity of cutting away the metal at said corners, as is
now commonly done.
In the accompanying drawings
-
Figure 1, is a plan view of a portion of a ceiling constructed according to and
embodying my invention, illustrating one of my improved plates in an operative
position with corner rosettes in position thereon.
Figure 2, is a plan view of one corner of the plate shown in Fig. 1.
Figure 3, is a view similar to Fig. 2, with an adjacent plate in position
thereon; and
Figure 4, is a sectional view on dotted line 4, 4, of Fig. 3.
In the accompanying drawings, A, represents one of my improved ceiling plates
having a continuous raised marginal border or moulding a, said mouldings extending
beyond their point of intersection, as shown, forming the projecting portions a³ at
the corners of the plate. I also preferably employ an inner continuous raised bead
or corrugation b, near the marginal raised portion a, in order to add strength and
rigidity to the plate to prevent buckling of the latter.
In placing the plates in position on the ceiling, the projecting portions a³ will
overlap the two marginal beads a on adjacent plates, as shown in Fig. 3, the corners
thus formed being covered with rosettes, D, each of which is provided with arms d
of a circular outline in cross-section, the latter fitting over the mouldings or beads a
and also over the two projections a' on the top plate, as shown by dotted lines in
Fig. 1. The rosettes are retained in place by a single nail driven through each of
them and through the overlapped portions of the mouldings a at their intersecting
points.
One of the prime advantages attained by my invention is, that the uniform
rigidity afforded by the raised marginal bead or moulding is retained and the plate
rendered uniform throughout, which points of advantage are destroyed by cutting
away the metal at the corners as is now commonly done. The corner projections a²,
when the overlapping plates are secured together, have a tendency to strengthen
the ceiling at those points and where strength is most needed; they also assist to
prevent the plates from warping out of position when placed together on a ceiling
in the manner aforestated. The edge of each overlapping plate terminates between
the two beads a and b, and said beads, when decorated, have a tendency to detract
the eye from said terminal edge, thus producing a ceiling that is at once attractive
and cheap to manufacture.
Having now particularly described 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.
(1) A metallin plate having a raised marœin or moulding on each side thereof.

page_text: said mouldings at the corners extending out beyond the margin of the plate,
substantially as set forth.
(2) A metallic plate having a continuous raised moulding a around its margin,
said mouldings extending out beyond their intersecting points, substantially as
specified.
(3) A metallic plate having a continuous marginal moulding a on each side
thereof, and an inner continuous raised bead b adjacent to said moulding, the latter
extending out beyond their points of intersection forming projections a³, as and for
the purposes set forth.
(4) A metallic ceiling composed of plates, each of which have a raised marginal
moulding a at each side thereof, said mouldings extending out beyond their inter-
secting points forming projections a³ which latter are adapted to overlap a portion
of the moulding on adjacent plates, and a suitable rosette for cach corner thus
formed, substantially as set forth.
(5) In a metallic ceiling, the plates A having a raised continuous moulding at
each side thereof and extending beyond their points of intersection forming
projections a³, the latter overlapping a portion of the moulding on adjacent plates
at the corners thereof, and a rosette D having lateral arms & overlapping the corner
mouldings and their projections a³, and properly secured thereto, substantially as
set forth.
Dated this 12th day of November 1892.