IMPROVEMENTS IN OR ADDITIONS TO GASALIERS AND GAS BRACKETS
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by Isaac Barnes at the Office of
the Commissioners of Patents, with his Petition, on the 24th March
1864.
I, ISAAC BARNES, of Birmingham, in the County of Warwick, Glass
Chandelier, and. Gas Globe Manufacturer, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN OR ADDITIONS TO GASALIERS AND GAS
BRACKETS," to be as follows:-
My Invention consists, firstly, in constructing or arranging the parts of
gasaliers in the manner herein-after described, whereby a less quantity of gas
is required to produce a given amount of illumination than is required in
ordinary gasaliers, and an elegant effect is produced in the gasaliers.
In constructing a gasalier according to my Invention, I fix near the bottom
of the pipe conducting the gas a glass globe or vessel, the surface of which is
made into a reflecting surface by silvering, or otherwise treating the inner
surface of the said globe or vessel. The lower part of the globe tapers nearly
to the size of the pipe on which it is supported, the said taper part being
slightly concave. At or near the bottom of the said reflecting globe a series
of radial horizontal pipes is situated, the said pipes being connected to the
central vertical pipe of the gasalier. Each of these radial pipes is supplied
with a burner projecting a horizontal flame. Surrounding the bottom and
sides of each of the said horizontal flames is a shade or glass. The said shades
are made in the form of an elongated shell or shallow dish, the wider part of
the said shells being most distant from the axis of the gasalier, and the convex

page_text: sides of the shells being downwards. The flame is situated within the
concavity of the said shells or shades. The said shades are not situated
horizontally, but are somewhat inclined to the central pipe of the gasalier, to
which central pipe the narrow ends of the said shades converge. The narrow
ends of the shades are furnished with metallic holders similar to the metallic
holders of ordinary shades, by which holders they can be readily connected to
or disconnected from the radial pipes or burners with which they are
respectively used. The gasalier below the shades is supplied with an orna-
mental termination. The central reflecting globe opposite each of the burners
is made into a series of facets, so as to produce a reflection of the flame of the
burner in each of the facets opposite the said flame. By arranging the parts
of the gasalier in the manner described a larger amount of illuminating power
is obtained than is obtained in an ordinary gasalier with the same expenditure
gas; the light is reflected by the central globe, and by the position and
shape of the glass shades a shadowless light is produced. Gasaliers con-
structed according to my Invention may be provided with hydraulic slides to
vary the height when in use. Gasaliers of the kind described may be made
of various sizes to suit the purposes to which they are to be applied. When
made of large size they may be used in place of the ordinary sun-light
burners.
of
My Invention consists, secondly, of the following improvements in or
additions to gas brackets.
In constructing gas brackets according to my Invention, I provide the
said brackets with burners projecting horizontal flames, and apply to the said
burners glass shades of the kind before described with reference to a gasalier.
I also fix to the bracket a reflecting surface behind the burner and,glass
shade, the said reflecting surface consisting either of a hemisphere or other
portion of a sphere. By these means I obtain the illuminating power and
effects described with reference to a gasalier.