IMPROVEMENTS IN GLAZING OR IN FIXING SHEETS OF GLASS, SLATE, METAL, OR OTHER SUBSTANCES FOR ROOFING OR OTHER PURPOSES
Year: 1879

page_text: LETTERS PATENT to Thomas William Helliwell, of Brighouse, in the County
of York, for the Invention of "IMPROVEMENTS IN GLAZING OR IN FIXING
SHEETS OF GLASS, SLATE, METAL, OR OTHER SUBSTANCES FOR ROOFING OR
OTHER PURPOSES."
Sealed the 13th January 1880, and dated the 16th July 1879.
PROVISIONAL SPECIFICATION left by the said Thomas William Helliwell at
"IM-
the Office of the Commissioners of Patents on the 16th July 1879.
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York.
PROVEMENTS IN GLAZING OR IN FIXING SHEETS OF GLASS, SLATE, METAL, OR
OTHER SUBSTANCES FOR ROOFING OR OTHER PURPOSES."
This Invention has reference to former improvements in glazing, for which
Provisional Protection was granted to me, bearing date the 13th February 1879,
No. 570, but it is also applicable to other systems, whether the sheets to be fixed
are metal or slate.
In the Specification of the Patent above referred to I have described apparatus
for joining together the adjacent edges of sheets of glass, which apparatus is
specially adapted for joining together the sloping or vertical edges, and my present
improvements consist in the application of a suitably shaped bar composed of metal,
wood, or other material placed between the horizontal edges, or between the top and
bottom of two adjacent sheets, which bar renders the joint more compact and also
serves as a trough to conduct moisture or water of condensation into the side
supports or troughs.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas William Helliwell in the Great Seal Patent Office on the
16th January 1880...
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York. "IM-
PROVEMENTS IN GLAZING OR IN FIXING SHEETS OF GLASS, SLATE, METAL, OR
OTHER SUBSTANCES FOR ROOFING OR OTHER PURPOSES."
This Invention has reference to former improvements in glazing for which
Provisional Protection was granted to me, bearing date the 13th February 1879,
No. 570, but it is also applicable to other systems of fixing sheets of glass, slate,
metal, or other substances.
In the Specification of the Patent above referred to I have described apparatus
for joining together the adjacent edges of sheets of glass, which apparatus is
specially adapted for joining together the sloping or vertical edges, and my present
improvements consist in the application of a suitably shaped bar composed of metal or
other suitable material placed between the horizontal edges or between the top and
bottom of. two adjacent sheets, which bar renders the joint more compact, and also
serves as a trough to conduct moisture or water of condensation into the side
supports or troughs.
In order that my Invention may be more fully understood I hereto annex a Sheet
of Drawings illustrative thereof.
Fig. 1 is a surface or plan view of two sheets of glass A and B supported by
metal strips D, E, the latter of which is not seen, being underneath; Fig. 2 is section
of same as seen from a, and Fig. 3 is section seen from b. The metal strip or bar C
the subject of the present Letters Patent is inserted between the adjacent edges of
the sheets A and B with the flat portion c resting on the outside of the lower sheet,
and the portion d forming a trough laying close to the underside of the upper sheet,
the ends of the bar C being carried into the trough formed by the strip E which
is cut away for the purpose as shewn in Fig. 3. Any water or moisture penetrating
through the joint between the two sheets from the outside falls into the trough
and is conducted thereby to the side trough E, and in like manner moisture con-
densing on the underside of the sheets is arrested by the trough d as it trickles
down and conveyed away, so avoiding any dropping in the interior of the structure.
The strip or bar may lean or fall, as shewn in Fig. 1, so as to enable the water to
run into the main or side troughs E. If required the top of the sheet A and
bottom of sheet B may be cemented to the bar C, in which case it would make the
sheets perfectly water or air tight.
Having now described the nature of my Invention, and shewn by Drawing how
the same may be put into practice, I would have it understood that I do not limit
nor confine myself to the exact outline of the bar C, as the groove d may be formed
for instance as shewn in Fig. 4; what therefore I claim as my Invention is,-
The use and employment of the bar C having flange c and trough d for the
purpose substantially as herein shewn and described.
In witness whereof, I, the said Thomas William Helliwell, have hereunto set
my hand and seal, this Fourteenth day of January, in the year of our Lord
One thousand eight hundred and eighty.
4
THO³, W. HELLIWELL. (L.S.)