An Improved Device for use with Incandescent Gas Lamps.
Year: 1897

page_text: Date of Application, 29th Nov., 1897-Accepted, 9th July, 1898
COMPLETE SPECIFICATION.
An Improved Device for use with Incandescent Gas Lamps.
I, LUCY HOOKER, of No. 109, Bedford Street, Newtown, near the City of
Sydney, in the Colony of New South Wales, Married Woman, do hereby declare
the nature of this invention and in what manner the same is to be used
to be particularly described and ascertained in and by the following state-
ment:
My invention is designed to provide an improved device for use with incan-
descent gas lamps in which the incandescent body instead of remaining rigid
will accommodate itself to the draught from the burner. For this purpose I
construct a tassel as hereinafter described and hang it on the hooked end of a
wire upright the lower end of which is secured by a screw to the bracket or
burner. This upright may be placed either inside, or outside, of a glass chimney
when such is used.
The tassel consists of a disc of asbestos covered with linen, calico, or other
suitable material. This disc may also be manufactured of wire gauze, platinum
or perforated steatite. Into this disc is fastened one end of a bunch, or num-
her, of hemp, or asbestos, threads; the whole forming a tassel, narrower at the
top than at the bottom.
When the tassel is made it is immersed in a chemical preparation or solution
consisting of acetate of aluminium acetate of magnesia, chrome alum and acetate
of zirconium. The best proportions I am acquainted with are one
ounce of
aluminium, one dram of chrome alum, one dram of acetate of magnesia, two
drams of acetate of zirconium: saturate the aluminium with acetic acid add
2oz. water and dissolve the whole in an evaporating dish by application of heat.
The tassel, by immersion, becomes thoroughly impregnated with the above
chemical preparation and when it is afterwards subjected to the gas flame the
hemp. linen, or other material is destroyed and the tassel remains a hard non-
inflammable substance. The fact of its swinging freely on a hook above the
Hame as described above will ensure its accommodating itself to the draught
from the fame and always occupying a proper relative position thereto.
The accompanying drawing illustrates the tassel suspended from the hooked
end of the wire upright with the lower end screwed to the bracket, or burner.
A is the disc. B is the bunch of hemp, or asbestos, threads. C is the hooked
wire upright. D is the screw to bracket, or burner, and E is the burner.
The device produced as described is highly refractory and produces a light
of great brilliancy suitable for lighting, dwelling houses, places of business,
public buildings, wharves, streets and other places. It is free from danger and
very economical.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed applied and used
I declare that what I claim is:.
:-
In, or for, incandescent gas lamps a device chemically impregnated as

page_text: described and adapted to be applied to the lamp substantially as illustrated by
the drawing for the purposes set forth.
Dated this Twenty-second day of October 1897
Witness:-
W. THOS. SHORTER.
Not. Pub.,
Sydney, N. S. Wales.
LUCY HOOKER.
Applicant.