IMPROVEMENTS IN GLAZING THE ROOFS OF HOTHOUSES AND OTHER STRUCTURES, AND IN APPARATUS TO BE EMPLOYED THEREIN, ALSO APPLICABLE TO ORDINARY GLAZING PURPOSES, AND FOR FIXING SHEETS OF SLATES, METAL, OR OTHER SUBSTANCES
Year: 1879

page_text: LETTERS PATENT to Thomas William Helliwell, of Brighouse, in the County
"
of York, Architect, for the Invention of IMPROVEMENTS IN GLAZING THE
ROOFS OF HOTHOUSES AND OTHER STRUCTURES, AND IN APPARATUS TO BE
EMPLOYED THEREIN, ALSO APPLICABLE TO ORDINARY GLAZING PURPOSES, AND
FOR FIXING SHEETS OF SLATES, METAL, OR OTHER SUBSTANCES."
Sealed the 12th August 1879, and dated the 13th February 1879.
PROVISIONAL SPECIFICATION left by the said Thomas William Helliwell
at the Office of the Commissioners of Patents on the 13th February 1879.
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York, Architect.
"IMPROVEMENTS IN GLAZING THE ROOFS OF HOTHOUSES AND OTHER STRUCTURES,
AND IN APPARATUS TO BE EMPLOYED THEREIN, ALSO APPLICABLE TO ORDINARY
GLAZING PURPOSES, AND FOR FIXING SHEETS OF SLATE, METAL, OR OTHER
SUBSTANCES."
This Invention relates to means to be employed for securing sheets of glass, slate,
stone, metal, or other substance, and will be readily understood on reference to the
accompanying Sheet of Drawings. Between the adjacent ends of each of the Sheets
A and B I introduce a metal strip or trough C, and above this I place another
metal strip D. I draw these two strips together, so as to secure the sheets by
means either of a pin a and wedge b or of bolt a and nut c.
Where the area to be glazed is of such an extent as to require several series or
rows of sheets the strip C may be continuous, but it will be advisable to divide the
strip D into as many parts as there are squares in depth, so as to secure the same
more effectually. By this method of securing the sheets the escape of water is
greatly facilitated.

page_text: Liewen in the Great Dear I atent Vinice Un
_the_13th August-1879=
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York. "IM-
PROVEMENTS-IN-GLAZING-THE-ROOFS-OF-HOTHOUSES AND OTHER STRUCTURES, AND
IN APPARATUS TO BE EMPLOYED THEREIN, ALSO APPLICABLE TO ORDINARY GLAZING
PURPOSES, AND FOR FIXING SHEETS OF SLATE, METAL, OR OTHER SUBSTANCES."
This Invention relates to securing sheets of glass; slåte, stone, metal, or other
substance by means of metal strips supported when necessary upon rafters, frame-
work, or other foundation or support, according to the nature of the structure to be
glazed or covered. According to my method the top and bottom or horizontal
edges of the sheets overlap, the perpendicular or vertical edges being joined by
metal strips; but,-
In order that my Invention may be more readily understood I herein give
reference to the accompanying Sheet of Drawings illustrative thereof. Fig. 1 is a
vertical cross section of a roof or other glazed area, in which a continuous strip of
metal A is shewn fixed to rafters B, which strip may be continuous from the ridge
to the eaves. The rafters may be either horizontal or vertical, and either at right
angles to the strip or parallel to it. The cross sectional form of the strip is shewn,
Fig. 2, which is a longitudinal section of roof, and will be seen to consist of two
troughs a joined by an arch or ridge b. The perpendicular edges of the sheets of
glass are supported by the sides of the troughs or channels a and held firmly thereon
by means of the strips C, which are of the same length as the sheets of glass, and
are secured to the strips B by any of the methods shewn in Fig. 2, viz., by pin c
soldered or revitted to the strip C passing through the strip. A and secured on the
underside by a cotter or nut d; or the pin may be secured to a broad head or
washer e, and passing through both strips may be held and tightened by nut f; or
the head of the pin may lie within the ridge as shewn at g. An india rubber
washer is placed over the pin between the two metal strips, which keep the joint
watertight and prevents the pin from dropping out when the upper bolt is taken
off. It will be seen that by carrying the arch of the strip A above the level of the
sheets of glass any moisture passing under the upper strip finds its way into the
troughs and cannot pass through the bolt holes in the strip, which might happen
if the arch were on a level with or lower than sheets of glass. The strips being
made of zinc or other elastic metal the seconal form admitts of their being drawn
tightly together without danger of breaking the glass, whilst the troughs a answer
very well for carrying away water of condensation or other moisture accumulating.
in the inside or beating in at the joints; the upper and lower edges of the sheets
may be cut diagonally, as shewn in Fig. 3, the inclined edges of which will
materially assist the flow of the moisture into the troughs. Structurers covered or
enclosed upon this principle may be readily erected and removed, are neat in
appearance, and very durable.
In Fig. 4 I have shewn a method of applying my Invention for reglazing old
skylights or sash frames by fastening the metal strips to the parallel bars F.
Having thus described the nature of my Invention, and shewn by Drawings
how the same is to be or may be performed, I would have it understood that what
I consider to be new and therefore claim as my Invention is,—
Firstly. The employment of separate metal strips A and C in combination, and
in the method of fastening the same together, as and for the purpose substantially
as herein shewn and described.

page_text: Secondly. The employment of strips A constructed so as to form the arch b, for
the purposes substantially as herein shewn and described.
In witness whereof, I, the said Thomas William Helliwell, have hereunto set
my hand and seal, this Twelfth day of August, One thousand eight hundred
and seventy nine.
THOS. W. HELLIWELL. (L.S.)