Improvements in the Chimneys or Outer Cases of Regenerative Gas Lamps.
Year: 1893

page_text: Date of Application, 5th June, 1893-Accepted, 22nd July, 1893
COMPLETE SPECIFICATION.
Improvements in the Chimneys or Outer Cases of Regenerative
Gas Lamps.
I HENRY COOPER SEDDON of 4 Colinett Road Putney in the County of Surrey
retired Colonel in H.M. Army, 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 improvements in that class of lamps known as re-
generative gas lamps more especially to those described in Specification of Letters
Patent No. 273 of Jany. 7, 1889, where the flame burns inside a closed vessel of
glass or other material the air to support combustion being heated before it is
supplied to the flame; the lighting of these lamps being generally effected either
by removing the globe, removing the recuperator body, or thro the funnel or
chimney or by the introduction of a separate constant burning flame or special
lighting device arranged under the burners.
Either of these plans is more or less inconvenient as when lighting these lamps
from the top of the chimney or funnel, or by the lighting device below the burners
an explosion of more or less violence is the result and the removal of the whole of
the upper portion of the lamp for lighting is not less inconvenient.
By my invention I make the chimney or outer casing in two parts jointed
together, either in metal, china, glass or other suitable material or a combination of
any of them, the joint or division being made preferably at or near the crown of
the dome shaped part of the chimney or casing as shewn at A on drawing whereby
the upper part can be removed for lighting either by means of a hinged joint,
bayonet catch joint, or straight socket joint as shewn.
Now in a regenerative lamp of this description with the chimney or outer casing
formed in two parts one of which is glass or china or similar material, that portion
of the chimney would be very likely to crack or fracture by coming into immediate
contact with the intensely heated inner portion of the lamp, this we obviate by
means of a ring or washer of asbestos (B) or other suitable nonconducting material
placed in a convenient position for this purpose.
Having now particularly described & ascertained the nature of my said
invention & in what manner the same is to be performed I declare that what I
claim is
(1) In a regenerative gas lamp, a chimney or outer casing constructed in two
parts, the upper portion removable for lighting purposes without interfering with
the dome containing the recuperator body of the lamp substantially as described.
(2) In a regenerative gas lamp having the chimney or outer casing in two parts,
the one portion of which is composed of china glass or similar material, a washer
or ring composed of asbestos or other suitable nonconductor of heat placed in a con-
venient position for insulating or protecting such portion of the chimney which is
fracturable by coming into contact with the heated portions of the lamp substantially
as described.
Dated this Second day of June 1893.