IMPROVED METHOD OF AND APPARATUS FOR MAKING THE GLAZING OF GLAZED STRUCTURES IMPERVIOUS TO DUST, AIR, AND WATER
Year: 1881

page_text: LETTERS PATENT to Thomas William Helliwell, of Brighouse, in the County
" AN
of York, Architect and Horticultural Engineer, for an Invention of
IMPROVED METHOD OF AND APPARATUS FOR MAKING THE GLAZING OF
GLAZED STRUCTURES IMPERVIOUS TO DUST, AIR, AND WATER."
PROVISIONAL SPECIFICATION left by the said Thomas William Helliwell
at the Office of the Commissioners of Patents on the 26th July 1881.
cr
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York, Architect
and Horticultural Engineer. AN IMPROVED METHOD OF AND APPARATUS FOR
MAKING THE GLAZING OF GLAZED STRUCTURES IMPERVIOUS TO DUST, AIR, AND
WATER."
The object of this Invention is to make the glazing of glazed structures.
practically dust proof, air proof, and water proof, and to provide for the removal of
water caused by condensation, which I accomplish by inserting between the over-
lapping edges of sheets of glass a bar formed either solid or hollow, and composed
of glass, zinc, or any other suitable material. In addition to and in combination
with the bar I employ a piece of packing composed of yielding material, such as
india rubber, gaskin, cotton packing, or other suitable substances, so that when
between the sheet of glass the packing will expand latterally, and so fill up
the space and effectually prevent air, dust, or water, from penetrating within the
glazed structures.
This arrangement causes the bottom laps of the glass to be apart and so provides
a space or channel for the removal of water caused by condensation which runs off
into other channels placed to receive it. If an absorbent packing is employed
then the condensed water is absorbed thereby and either given off by evaporation
or other natural causes.

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
26th January 1882.
16
THOMAS WILLIAM HELLIWELL, of Brighouse, in the County of York, Architect
and Horticultural Engineer. AN IMPROVED METHOD OF AND APPARATUS FOR
MAKING THE GLAZING OF GLAZED STRUCTURES IMPERVIOUS TO DUST, AIR, AND
WATER."
The object of this Invention is to make the glazing of glazed structures
practically dust proof, air proof, and water proof, and to provide for the removal
of water caused by condensation, which I accomplish by inserting between the
overlapping edges of sheets of glass a bar formed either solid or hollow, and
composed of glass, zinc, or any other suitable material. In addition to and in
combination with the bar 1 employ a piece of packing composed of yielding
material, such as india-rubber, gaskin, cotton packing, or other suitable substances,
so that when pressed between the sheet of glass the packing will expand latterally,
and so fill up the space and effectually prevent air, dust, or water from penetrating
within the glazed structures.
In order that my Invention may be more readily understood, I herein give
reference to the accompanying Sheet of Drawings illustrative thereof. A represents
a wood purlin on which rests a continuous bar of metal B having two channels or
troughs a and b formed therein; the bottom sheet of glass C is supported by the
bar B, and held firmly thereon by the bar D, which is the same length as the sheet
of glass, as shewn and more fully described in previous Letters Patent granted to
me, February 13th, A.D. 1879, No. 570.
Between the overlapping edges of the bottom sheet of glass C and the top sheet
of glass E is placed what I term a "condensation" bar F, thereby forming a space or
channel between the top and bottom laps of glass to receive the condensed water
which runs off into other channels, viz., b and a, placed to receive it.
In order to make the roof impervious to dust, air, and water, I employ in
combination with the condensation bar a piece of india-rubber tubing or other
form of packing, and place it as shewn at G, in the space formed between the over-
lapping edges of glass, by which means it is nearly impossible for dust, air, or
water to pass through the laps of glass into the building. If gaskin or other
absorbent packing is employed, then the condensed water is absorbed thereby, and
either given off by evaporation or other natural causes.
Having now shewn and described my improvements and explained how the
same may be put into practice, I would have it understood that I do not confine
myself to the size, form, or materials to be employed, as these may be varied as
required, what however I believe to be new within the realm, and therefore claim
as my Invention is,-
Firstly. The use and employment of the condensation bar F placed between
the overlapping edges of the sheets of glass so as to form a space or channel for
the purpose substantially as herein shewn and described.
Secondly. The use and employment of the condensation bar F in combination
with continuous bar B, formed with the channels a and b for carrying off condensed
water, substantially as herein shewn and described.

page_text: Thirdly. The combined use of the condensation bar F and packing G for
preventing the access of dust, air, and water, substantially as shewn and
described.
In witness whereof, I, the said Thomas William Helliwell, have hereunto set
my hand and seal, this Twenty first day of January, in the year of our
Lord One thousand eight hundred and eighty two,
THOS. W. HELLIWELL. (L.S.)