MENTS IN GLAZED STRUCTURES FOR HORTICULTURAL AND OTHER PURPOSES "
Year: 1883

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LETTERS PATENT to John Edgcumbe Rendle and Frank Bullen Rendle both
of Victoria Street in the City of Westminster for an Invention of IMPROVE
MENTS IN GLAZED STRUCTURES FOR HORTICULTURAL AND OTHER PURPOSES
"
"
PROVISIONAL SPECIFICATION left by the said John Edgcumbe Rendle
and Frank Bullen Rendle at the Office of the Commissioners of Patents on
the 14th March 1883.
JOHN EDGCUMBE RENDLE and FRANK BULLEN RENDLE both of Victoria Street
in the City of Westminster. "IMPROVEMENTS IN GLAZED STRUCTURES FOR
HORTICULTURAL AND OTHER PURPOSES
و"
This invention has for its object improvements in glazed structures for horti-
cultural and other purposes as for example Railway Stations and Sheds, Winter
Gardens, Exhibition buildings, Markets and other public buildings, workshops,
Weaving sheds and other such like structures. For this purpose we support the
side edges of the sheets of glass upon astragals formed from sheet metal in the
manner illustrated in the Drawing hereunto annexed. We form such astragals
with flat bearing surfaces for the edges of the glass to rest on and we hold the glass
down onto these surfaces by flat bearing surfaces on the under side of bent strips of
metal which are held down on to the glass by means of bolts as shown. We also
form the astragals with. troughs or channels along each side below the glass to
carry off any water that may condense on the under side of the glass and run into
them. At A Figure 1 we have shewn a cross section of one form in which we
construct the astragals. B. B. are the side edges of two sheets of glass resting upon
it. C is an arched strip of metal the side edges of which are bent inwards below
the arch to form flat bearing surfaces to rest upon the top of the glass. D is one
of the bolts for holding down the strip C. Figure 2 shews a perspective view of
part of the astragal the sheets of glass the holding down strip C and one of the
bolts. Figure 3 is a similar perspective view to shew the way in which the
astragals are carried by horizontal purlins E of wood and how we cause the lower
edges of the sheets of glass to rest upon flashings F of bent metal fixed to the top

page_text: of the purlins. Figure 4 is a similar view to shew how we place a wind guard of
sheet metal in front of the open end of the trough shaped astragal. Figure 5 is a
cross section taken through one of the purlins E shewing how we hold down the
upper edges of the sheets of glass and how they are made to go below the lower
edges of the sheets of glass above them. This view also shews how any water
condensing on the under side of the glass and running down to the metallic
flashing F can pass away through holes in this flashing on to the top of the sheet of
glass, below.
The form of the astragal in transverse section may be varied as for example it
may be of the form shewn at Figure 6. With either of the forms shewn at
Figures 1 to 6 any water passing between the glass and the surfaces between which
it is held would descend into the hollow trough of the astragal and pass away
from its lower end. In place of this arrangement the astragal might be shaped so
that any water entering between the glass and the surfaces by which it is held
should pass into the side channels formed along either side of the lower part of the
astragal. An astragal so formed is shewn at Figure 7.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Edgcumbe Rendle and Frank Bullen, Rendle, in the. Great
Seal Patent Office on the 14th September 1883.
JOHN EDGCUMBE RENDLE and FRANK-BULLEN RENDLE both of Victoria Street
in the City of Westminster. "IMPROVEMENTS IN GLAZED STRUCTURES FOR
HORTICULTURAL AND OTHER PURPOSES
"
This Invention has for its object improvements in glazed structures for horti-
cultural and other purposes as for exainple Railway stations and sheds, Winter
Gardens, Exhibition buildings, Markets and other public buildings, workshops
weaving sheds and other such like structures. For this purpose we support the
side edges of the sheets of glass upon rafters or astragals formed from sheet metal
in the manner illustrated in the Drawing hereunto annexed. We form such
rafters with flat bearing surfaces for the edges of the glass to rest on and we hold
the glass down onto these surfaces by flat bearing surfaces on the under side of
bent strips of metal which are held down on to the glass by means of bolts as
shown. We also form the rafters with troughs or channels along each side below
the glass to carry off any water that may condense on the under side of the glass
and run into them. At A Figure 1 we have shown a cross section of one form in
which we construct the rafters B. B. are the side edges of two sheets of glass
resting upon it. C is an arched strip of metal the side edges of which are bent
inwards below the arch to form flat bearing surfaces to rest upon the top of the
glass. D is one of the bolts for holding down the strip C. Figure 2 shews a
perspective view of part of the rafter the sheets of glass the holding down strip C
and one of the bolts. Figure 3 is a similar perspective view to shew the way in
which the rafters are carried by horizontal purlins E of wood and how we cause
the lower edges of the sheets of glass to rest upon flashings F of bent metal fixed to
the top of the purlins. Figure 4 is a similar view to shew how we place a wind
guard of sheet metal in front of the open end of the trough shaped rafter Figure 5
is a cross section taken through one of the purlins E showing how we hold down
the upper edges of the sheets of glass and how they are made to go below the lower
edges of the sheets of glass above them. This view also shows how any water
condensing on the under side-of the glass and running, down to the metallic
flashing F can pass away through holes in this flashing on to the top of the sheet
of glass below.
The form of the rafter in transverse section may be varied as for example it may
be of the form shewn at Figure 6. With either of the forms shewn at Figures 1 to 6
any water passing between the glass and the surfaces between which it is held
would descend into the hollow trough of the rafter and pass away from its lower
end. In place of this arrangement the rafter might be shaped so that any water
entering between the glass and the surfaces by which it is held should pass into
the side channels formed along either side of the lower part of the rafter. A rafter
so formed is shewn at Figure 7.
Having thus described the nature of our invention and the manner of performing
the same we would have it understood that we claim —
First. The combination of the sheet metal rafters A cap pieces C and connecting
bolts D for holding the side edges of the sheets of glass of glazed structures for
horticultural and other purposes substantially as described and illustrated in the
Drawing annexed,
Second. The sheet metal rafters with flat bearing surfaces for the side edges of
the sheets of glass to rest upon and with troughs or channels below these bearing

page_text: surfaces to carry off water which may pass in at the side edges of the glass or
condense on the under side of the glass substantially as described and illustrated in
the Drawing annexed.
Third. The construction of glazed structures for horticultural and other purposes
substantially as described and illustrated in the Drawing annexed.
In witness whereof the said John Edgcumbe Rendle and Frank. Bullen Rendle
have hereunto set our hands and seals this thirteenth day of September in the
year of our Lord One thousand eight hundred and eighty three.
ת
JOHN. EDGOUMBE RE
RENDLE (L.)
FRANK BULLEN RENDLE
(L.S.)