An Improved Chimney and Chimney Holder for Gas Incandescent Light.
Year: 1896

page_text: Dale of Application, 27th.Apr., 1896-Accepted, 30th May, 1896
COMPLETE SPECIFICATION.
An Improved Chimney and Chimney Holder for Gas Incandescent
Light.
I, MAX RAPHAEL of 10 Zimmerstrasse, 'Breslau, in the Empire of Germany,
Manufacturer, 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 an improved chimney for gas incandescent light.
The chinneys for gas incandescent light which have heretofore been used have
the defect that the high temperature of the burning gases iesuing from the burner
very frequently causes the cylinder to break in consequence of the slight width of
the latter. Moreover it occurs very often that the mantle arranged on the burner
is injured owing to the narrowness of the chimney thereby producing the customary
pointed flame, the high temperature of which heats the narrow cylinder irregularly
so that it breaks.
To obviate the aforesaid inconveniences is the object of my said invention
represented in the drawing and hereinafter described.
The improved chimney a consisting of mica or of glass is made of considerably
greater width than the chimneys heretofore employed, so that the before-mentioned
pointed flame cannot reach the wall of the chimney and that consequently the
breakage of the same is almost precluded.
In order to obtain a good lighting effect the improved chimney is moreover
furnished with a perforated metallic ring & placed in the gallery of the lamp. By
this means I obtain the admission of air which has a beneficial effect upon the
incandescence of the mantle.
With the object of giving a firm hold to the chimney in the perforated ring b
the latter is furnished with two slots c placed at an angle of 180 degrees relatively
to each other and which serve for the reception of the pins d arranged on the
cylinder a at the same angle. By a turning movement in the direction of the band
of a clock the chimney will be firmly secured in the perforated ring b.
The improved chimney is made of considerably shorter length than the customary
chimneys, thereby enabling the flame to be lighted from the top without injuring
the carbonized mantle by an explosion of the gas collected in a narrow chimney
such as very often occurs in the case of the chimneys hitherto used.
As the above described invention relates chiefly to the dimensions of the chimneys
apart from the device for the admission of air, it will of course be understood that
similar results may be achieved with a wider gallery necessitating the use of a wider
chimney.
In conclusion it may be observed that by the employment of a lower and wider
chimney the cleaning of such chimuey can be effected with much greater facility
than in the case of the customary long chimneys.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is;-
1. A chimney a for gas incandescent light, which consists of mica or of glass
such chimney being of a larger diameter than the customary chimneys for gas

page_text: incandescent light, and being furnished with a perforated ring b which permits of
the admission of air.
Dated this 31st day of March 1896.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.