Improvements in the Construction of Glass Roofs, Skylights, and the like, and in Metal Bars to be used therefor.
Year: 1894

page_text: Date of Application, 2nd Mar., 1894
Complete Specification Left. 1st Jan., 1895-Accepted, 2nd Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Glass Roofs, Skylights, and
the like, and in Metal Bars to be used therefor.
I, SAMUEL DEARDS of Victoria Works, Harlow in the County of Essex,
Horticultural Builder aud Engineer, do hereby declare the nature of this invention
to be as follows:
My invention relates to the construction of glass roofs, skylights and the like,
in which the system generally known as dry glazing is employed, and it has
reference more particularly to a method of construction in which the side edges
of the plates of glass fit into and are gripped or clipped between the side openings
of metal bars which are somewhat in the form of two C's put back to back as will
be well understood on reference to the Specifications of my former Patents No. 2806
of 1882 and No. 10,000 of 1889.
According to my present invention instead of employing metal bars in the form
of two C's back to back, I employ a lower sash bar and a cap so constructed that
they become self-locked to each other no bolts, screws or nuts being required.
The sash bar which is preferably of iron or steel is of inverted T-shape in section
the edges of the arms of the T being curved upwards to constitute the lower
support for the sides of the plates of glass. The cap is of copper or other suitable
material and is formed from a metal sheet so bent and shaped that its transverse
section presents a form approximate to a hollow T the sides of the web or upright
of which fit over the web or upright of the inverted T sash bar, whilst the edges of
the arms of the hollow T are curved downwards. The distance between the curved
up edges of the sash bar and the curved down edges of the cap when in place is
such as to receive and grip the plates of glass placed between them..
In order to lock the cap and the sash bar together I affix studs on the web of
the sash bar at suitable intervals apart, and at corresponding intervals in the web
of the cap I cut gaps or passage ways. When the cap is placed over the sash bar,
the studs pass through the gaps in the web of the cap and then disengage from
the gaps as they enter the hollow arms of the cap. By then slightly moving the
cap along the bar the studs bear against the inside of the under part of the
hollow arins of the cap and thereby lock the cap and the bar securely to each
other.
It will be thus understood that the underside of the plates of glass near their
edges will rest firmly on the up-turned portion of the extremities of the arms of
the sash bar while the upper side of the glass plates is gripped or pressed by
the corresponding turned down parts of the cap, the elasticity of the metal of
which the cap is formed being sufficient to secure the glass without fear of.
fracture.
The curved arms of the sash bar form gutters to carry off condensed vapor.
Dated this 2nd day of March 1894.

page_text: Improvements in the Construction of Glass Roofs, Skylights, and
the like, and in Metal Bars to be used therefor.
I, SAMUEL DEARDS of Victoria Works, Harlow in the County of Essex,
Horticultural Builder and Engineer, 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:-
My invention relates to the construction of glass roofs, skylights and the like,
in which the system generally known as dry glazing is employed, and it has
reference more particularly to a method of construction in which the side edges
of the plates of glass fit into and are gripped or clipped between the side openings
of metal bars which are somewhat in the form of two C's put back to back as will
be well understood on reference to the Specifications of my former Patents No. 2806
of 1882 and No. 10,000 of 1889.
According to my present invention instead of employing metal bars in the form
of two C's back to back, I employ a lower sash bar and a cap so constructed that
they become self-locked to each other no bolts, screws or nuts being required.
The sash bar which is preferably of iron or steel is of inverted T-shape in section
the edges of the arms of the T being preferably curved upwards to constitute the
lower support for the sides of the plates of glass. The cap is of copper or other
suitable material, and is formed from a metal sheet so bent and shaped that its
transverse section presents a form approximate to a hollow T the sides of the web
or upright of which fit over the web or upright of the inverted T sash bar, whilst
the edges of the arms of the hollow T are curved downwards. The distance
between the curved up edges of the sash bar and the curved down edges of the
cap when in place is such that the plates of glass placed between them are firmly
gripped.
In order to lock the cap and the sash bar together I affix studs on the web of
the sash bar at suitable intervals apart, and at corresponding intervals in the web
of the cap I cut gaps or passage ways. When the cap is placed over the sash bar,
the studs pass through the gaps in the web of the cap and then disengage from
the gaps as they enter the hollow arms of the cap. By then moving the cap a
short distance-along the bar the studs bear against the inside of the under part of
the hollow arms of the cap and thereby lock the cap and the bar securely to each
other.
It will be thus understood that the under side of the plates of glass near their
edges will rest firmly on the up-turned portion of the extremities of the arms of
the sash bar while the upper side of the glass plates is gripped or pressed by
the corresponding turned down parts of the cap, the elasticity of the metal of
which the cap is formed being sufficient to secure the glass without fear of
fracture.
The curved arms of the sash bar form gutters to carry off condensed vapor.
The accompanying drawings illustrate my invention.
Figure 1 is a perspective view showing a portion of a lower bar and of a cap in
position with a plate of glass secured between them at one side.
. Figure 2 is a side view of the cap alone.
a is the lower bar which is of inverted T shape in section the arms of the T
being curved upwards at bb to constitute the lower support for the sides of the
plates of glass. c is the cap; it is formed of a metal sheet so bent and shaped as
shown that its transverse section is approximately in, the form of a hollow T, the
sides of the web or upright d of which fit over the web or upright of the sash bar a

page_text: whilst the edges of the arms of the hollow T are curved downwards as seen at e e.
The distance between these edges e e and the curved up edges bb of the lower bar is
such that they grip the plates of glass firmly between them. f represents the glass
plate. 99 are studs on the web of the lower bar a at intervals of say 15 to
18 inches. hh are corresponding gaps or passage ways cut vertically in the
cap c.
When the cap c is placed over the web of the bar a the studs 9 pass
through the gaps h and then disengage therefrom as they enter the hollow arms of
the cap. By then moving the cap a short distance along the bar the studs g bear
against the inside of the hollow arms of the cap and thereby lock the cap and the
bar securely to each other. is the usual fixed stop piece at the lower end of the
lower bar 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. In the construction of glass roofs, skylights and the like, the combination of a
lower bar such as a having studs g and a cap such as having gaps has and for
the purpose described and shown.
2. A sash bar of the particular form and construction shown at a with its studs g
for the purpose set forth.
3. A cap of the particular form and construction shown at e with its gaps h for
the purpose set forth.
Dated this 1st day of January 1895.
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Patent Agents.