IMPROVE- MENTS IN GLAZED STRUCTURES FOR HORTICULTURAL AND OTHER PURPOSES
Year: 1877

page_text: LETTERS PATENT to William Edgcumbe Rendle, of 3, Westminster Chambers,
Victoria Street, in the City of Westminster, for the Invention of "IMPROVE-
MENTS IN GLAZED STRUCTURES FOR HORTICULTURAL AND OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said William Edgcumbe Rendle
at the Office of the Commissioners of Patents on the 15th January 1877.
WILLIAM EDGCUMBE RENDLE, of 3, Westminster Chambers, Victoria Street, in
the City of Westminster. "IMPROVEMENTS IN GLAZED STRUCTURES FOR HORTI-
CULTURAL AND OTHER PURPOSES."
This Invention has for its object improvements in glazed structures for horti-
cultural and other purposes, as, for example, for railway stations and sheds, winter
gardens, exhibition buildings, skating rinks, markets, public buildings, workshops,
weaving sheds, skylights, and other such structures.
In the Specification of a former Patent granted to me, No. 1349, in the year 1870,
I described a system of glazing in which the upper and lower edges of the sheets
of glass were retained in grooves or channels in bars formed by sheet metal bent in
the manner shewn at Figure 1.
According to my present Invention I form slots in the outer lip of the bar in the
manner shewn at Figure 2; I also form holes in the bottom of the groove to carry
off any accumulation of water; also holes bored opposite the slots above mentioned
for driving screws to fix the bars. This plan will prevent water being sucked up
by capillary attraction, and also facilitate the fixing of the bars in position.
In place also of allowing the side edges of the sheets of glass to overlap one
another, I, in some instances, where the roof is flat, interpose between the sides of
the adjoining sheets a small vertical bar formed from thin sheet metal bent to form
in the manner shewn at Figure 3, so as to obviate indraught and water penetrating.
The bar is placed vertically between the adjoining squares of glass, and is of the
same length as the glass. At its lower end it is tapered to convey drip or vapour
into the troughts or channels in which the lower edge of the glass is received. The
glass will butt against each side of the vertical bar, as shown at Figure 4..

page_text: In the case of very flat roofs I place a zinc capping on the purlins with a gutter
on either side in a horizontal manner, as shewn at Figure 5, and to carry off any
water in them I employ a vertical gutter running from purlin to purlin, and so
convey the water off the roof.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Edgcumbe Rendle in the Great Seal Patent Office on the 13th
July 1877.
"
WILLIAM EDGCUMBE RENDLE, of 3, Westminster Chambers, Victoria Street, in
the City of Westminster. "IMPROVEMENTS IN GLAZED STRUCTURES FOR HORTI-
CULTURAL AND OTHER PURPOSES."
This Invention has for its object improvements in glazed structures for horti-
cultural and other purposes, as, for example, for railway stations and sheds, winter
gardens, exhibition buildings, skating rinks, markets, public buildings, workshops,
weaving sheds, skylights, and other such structures.
In the Specification of a former Patent granted to me, No. 1349, in the year 1870,
I described a system of glazing in which the upper and lower edges of the sheets
of glass were retained in grooves or channels in bars formed by bending sheet
metal.
According to my present Invention I form slots in the outer lip of such bars in
the manner shown at a, a, Figure 1. I also form holes b in the bottom of the outer
groove to allow any water to run off on to the square of glass below, also holes c
bored opposite the slots above mentioned for driving screws to fix the bars, as will
be clearly seen at Figure 2; these holes also allow water to run off on to the square
below. This plan will prevent water being sucked up by capillary attraction and
also facilitate the fixing of the bars in position. The half bends d which are left
at the lower part of the slots a come flush with the glass and act as a wind guard
to prevent wind entering below the glass.
In place also of allowing the side edges of the sheets of glass to overlap one
another, I, in some instances, especially where the roof is flat, interpose between the
sides of the adjoining sheets a small vertical bar a formed from thin sheet metal
bent to form in the manner shown at Figures 3 and 4, so as to obviate indraught
and water penetrating. The bar a is placed between the adjoining squares of glass
and is nearly of the same length as the glass. The horizontal bars which receive
the ends of the squares of glass are notched to allow the lower ends of the vertical
bars to come above and rest on the upper ends of the vertical bars below, as seen
at Figure 4, so that any water that enters the grooves or channels of one vertical
bar runs off upon the capping of the vertical bar below.
In the case of very flat roofs I place a zinc capping on the purlins with a
gutter a, a, on either side in a horizontal manner, as shown at Figure 5, and to
carry off any water in them I employ vertical gutters b, b, running from purlin to
purlin, and so convey the water off the roof. Above the purlin is fixed a bar c of
bent sheet metal, such as above described, for receiving the ends of the squares of
glass. The vertical gutters b may lie in notches in the purlins, and the sides of
the vertical gutters may be notched to receive the bottom part of the ends of the
gutters a.
Having thus described the nature of my Invention and the manner of performing
the same, I would have it understood, that I claim as my improvements in glazed
structures for horticultural, railway, and other purposes,-
First. The improved construction of bar for receiving the ends of the squares of
glass, substantially as described and illustrated at Figures 1 and 2.
Second. The construction and use of bars a, Figures 3 and 4, substantially as
described.

page_text: Third. The combined arrangement, substantially as described and shewn at
Figure 5, for supporting the ends of sheets of glass at the purlins of a roof and for
preventing any drip of water from the purlins.
In witness whereof, I, the said William Edgcumbe Rendle, have hereunto
set my hand and seal, this Twenty-third day of June, in the year of our
Lord One thousand eight hundred and seventy-seven.
WILLIAM EDGCUMBE RENDLE. (L.S.)