Improvements in Metallic Ceilings and Plates therefor.
Year: 1893

page_text: Date of Application, 3rd Oct., 1893-Accepted, 11th Nov., 1893
COMPLETE SPECIFICATION.
Improvements in Metallic Ceilings and Plates therefor.
I, LONGLEY LEWIS SAGENDORPH, corner of Hamilton and 23rd Streets, City
and County of Philadelphia, State of Pennsylvania, United States of America,
Manufacturer of Sheet-metal Devices, 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 and nature of this invention will be apparent from the description
hereinafter contained and as pointed out in the claims.
In the drawings accompanying this Specification
-
Figure 1, is a plan view taken at the corners or intersection of four ceiling plates
embodying my invention, and
Figure 2, is a section on dotted line 2, 2, of Figure 1.
Fig. 3, is an enlarged plan view of a ceiling plate, partially broken away,
einbodying my invention.
My invention is more especially designed for use in connection with metallic
plates having a plain or embossed face with a marginal moulding, a, which latter
terminates in the side and end flanges, b, which latter, on one plate, are adapted
to overlap corresponding flanges on adjacent plates when the latter are placed in
position on the ceiling, as shown. The moulding on each plate is preferably
formed continuous around the sides and ends thereof, but may be otherwise suitably
formed, as my present invention relates to the formation of the corners of the
plate.
In stamping a ceiling plate to form a raised molding with marginal flanges, it
has been customary, heretofore, to cut away the metal at the corners of the plate to
prevent buckling the metal at those points, and afterward cover said cut-away
portions with suitable rosettes; but, this cutting away of the metal at the corners
is objectionable, especially so if it is desired to form the ceiling dust-proof.
My invention consists in forming across the face of each side and end flange,
near the corners of the plate, a groove, &, which latter is preferably on a line with
the outer edge of the moulding, a, as more clearly shown in Fig. 3. By forming
the grooves, b, in each side and end flange, to a depth equal to the depth of said
flanges, I am enabled to take up the surplus metal at the corners and form a
rectangular raised cap, B, at each of said corners, the cap at one corner overlapping
a corresponding cap on the corner of an adjacent plate, as shown.
formation, the ceiling composed of plates thus constructed is rendered dust-proof,
and no rosettes need be used, as the corner caps, B, (if desired) may be embossed
in any desired outline for ornamentation.
By this
The formation of the integral corner caps, B, in the manner aforestated, has a
tendency to strengthen the plate and add to its rigidity over the method heretofore
employed of cutting away the corner metal.
The overlapping portion d of each cap rests within the groove & at that side of
the underlying cap, in which position the edge of the metal is hidden from view,
producing a smooth symmetrical joint.
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 metallic ceiling plate having raised side and end flanges, b, with grooves b³
formed therein at their intersecting points substantially, as set forth.
(2) A metallic ceiling plate having raised side and end flanges, b, and corner
caps. B. the latter being separated from said flanges by grooves, 63, as set forth.

page_text: (3) A metallic ceiling plate having a raised molding, a, terminating in side and
end flanges, b, and corner caps, B, with grooves between said caps and flanges
on a line with the intersection of said molding and flanges, substantially as set
forth.
(4) A metallic ceiling plate having a continuous raised molding, a, terminating
in side and end flanges b, said plate having the raised corner caps, B, the latter
being separated from said flanges by grooves 6, substantially as set forth.
(5) A metallic ceiling composed of separable plates, each plate having the
raised interlocking flanges and corner caps, B, integral with said plate, the
Hanges and caps of one plate overlapping the flanges and caps of the adjacent
plates, said plates being secured to place by means of suitable nails passed through
said overlapping caps, as set forth.
Dated this 1st day of September 1893.
LONGLEY LEWIS SAGENDORPH.