improvements in Astragals for use in Glazing.
Year: 1898

page_text: improvements in Astragals for use in Glazing.
I, ALEXANDER SHARP DOUGLAS, Jr., A.M.Inst.C.E., of 92, West Regent Street,
in the City of Glasgow, Merchant, do hereby declare the nature of this invention
to be as follows;-
;-
This invention has for its object to provide a light and strong astragal for
use in glazing without putty and adapted to retain without special fastenings
a lead, zinc or other soft sheet metal cap for holding the glass sheets in place
upon the astragal.
Under one modification the astragal bar is rolled in iron or steel of approxi-
mately cruciform section and having its vertical webs formed each with a bead
or bulbous edges so that in section the bar resembles a light railway rail but
with transverse or horizontal webs or ribs forming a support on each side of
the central web. The glass is rested on the horizontal webs of the bar and it is
held in place thereon by means of a cap extending the full length of the
astragal and which may be formed by pressing a strip of sheet lead or like soft
sheet metal around the bulbous head or top of the bar, partly down the sides
of the vertical web and then horizontally to overlap the edges of the glass, and
this cap may be held down by spring clips. Or the cap may be formed of sheet
zinc or like metal having a certain degree of resiliency the cap being shaped
to fit approximately the contour of the bulbous head and web and extend over
the edges of the glass, and being sprung or slipped endwise over the bulbous
head of the bar. In either case the cap is retained in place by the bulbous or
beaded head of the bar and requires no screws or other fastenings to hold it
down. On the under side of the glass an inverted cap of sheet metal may be
sprung or fitted over the lower bead or bulb of the astragal and have its edges
curved outwards to form gutters for the reception of drip due to condensation
of moisture on the glazed structure.
In another modification the bar is made with a central vertical web above
and of inverted channel section at its lower part so as to provide a support for
the glass on each side of the central web. The latter is grooved or channeled
throughout its length and has fitted in it at intervals cross pins or pegs to retain
in place the sheet metal cap which is formed with a mid rib adapted to enter
the groove of the astragal and having hook-like parts which on sliding the cap
endwise engage with the pins or pegs and serve to retain the cap in place.
Dated this 29th day of September 180S
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.

page_text: Improvements in Astragals for use in Glazing.
I, ALEXANDER SILARP DOUGLAS, Jr., A.M.Inst.C.E., of 92, West Regent Street,
in the City of Glasgow, Merchant, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:
This invention has for its object to provide a light and strong astragal for
use in glazing without putty and adapted to retain without special fastenings
a lead, zinc or other soft sheet metal cap for holding the glass sheets in place
upon the astragal.
The invention is illustrated by the accompanying drawings, Figure 1 being
a transverse vertical section of the improved astragal, Figure 2 a view similar
to Figure 1 but with the cap or cover strip bent in a slightly different manner.
Figures 3 and 4 are respectively transverse vertical section and perspective view
of a modified form of astragal bar and showing another method of securing the
cover strip thereto.
Under one modification as shown at Figs. 1 and 2 the astragal bar is rolled
in iron or steel of approximately cruciform section and having its vertical
webs A¹ formed each with a bead or bulbous edges A. so that in section the bar
resembles a light railway rail but with transverse or horizontal webs or ribs A2
forming a support on each side of the central web A¹. The glass B is rested
on the horizontal webs A2 of the bar and it is held in place thereon by means
of a cap C extending the full length of the astragal and which may be formed
by pressing a strip of sheet lead or like soft sheet metal around the bulbous
head or top A. of the bar, partly down the sides of the vertical web A¹ and then
horizontally to overlap the edges of the glass B, and this cap C may be held
down by spring clips D, as shown at Fig. 2. Or the cap C may be formed of
sheet zine or like metal having a certain degree of resiliency the cap being
shaped to fit approximately the contour of the bulbous head and web and extend
over the edges of the glass, and being sprung or slipped endwise over the bul-
bous head of the bar, as is the case in the example shown at Figure 1. In
either case the cap C is retained in place by the bulbous or beaded head A of
the bar and requires no screws or other fastenings to hold it down. On the
under side of the glass B an inverted cap E of sheet metal may be sprung or
fitted over the lower lead or bulb A of the astragal and have its edges curved
outwards to form gutters E for the reception of drip due to condensation of
moisture on the glazed structure.
In another modification illustrated at Figs. 3 and 4, the bar is made with a
central vertical web A3 above and of inverted channel section at its lower part A
so as to provide a support for the glass on each side of the central web A. The
latter is grooved or channeled at A throughout its length and has fitted in it
at intervals cross pins or pegs F to retain in place the sheet metal cap G which
is formed with a mid rib G₁ adapted to enter the groove A³ of the astragal and
having inclined slots G2 or hook-like parts which on sliding the cap G endwise
engage with the pins or pegs F secured in the vertical web A³ of the astragal
and serve to retain the cap G in place. Gutters A° are formed during the
milling process on the upper side of the part A+.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
-
1. An astragal for use in glazing, comprising a bar of rolled iron or steel

page_text: having a central vertical rib A', horizontal webs or ribs A2 for supporting the
glass and bulbs A formed on the upper and lower ends of the vertical web or
rib, a cap Cbent round the upper bulb and bearing at its ends upon the glass,
and an inverted cap E bent round the lower bulb and curved outwards at its
ends to form gutters E', substantially as described.
2. An astragal for use in glazing comprising a bar of rolled iron or steel
having a central vertical rib A³ grooved centrally and a cap G having a mid
web G adapted to be entered into the central groove, pins F fitted at intervals
in the central web A³ and inclined slots or hook-like parts in the mid web G¹
adapted to be brought over the pins F so as to retain the cap G in position upon
the glass B and to retain the latter upon the horizontal support A4, substantially
as described.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agent for the Applicant.