Improvements in or Applicable to Regenerative Gas Lamps or Lanterns.
Year: 1887

page_text: Date of Application, 21st Jan., 1887.
Complete Left, 28th Mar., 1887.
Complete Accepted, 29th Apr., 1887.
Improvements in or Applicable to Regenerative Gas Lamps or
Lanterns.
We SAMUEL CHANDLER Junior, and JOSIAH CHANDLER, both of Central Works,
Kennington Oval, in the county of Surrey, Gas Engineers do hereby declare the
nature of this invention to be as follows:-
This invention relates chiefly to an arrangement of combined gas burner and cold
air feeder for regenerative gas lamps or lanterns whereby the gas is prevented from
reaching the high temperature usual in regenerative gas lamps and which high
temperature causes, as is well known, a considerable carbonaceous deposit which is
objectionable as the orifice of the burner becomes choked thereby.
In carrying out this part of our invention we employ a cold air feeder or cooler
which cold air feeder or cooler consists of a pipe or pipes adapted to convey air from
outside the lamp through the gas supply pipe; such cold air egresses near the point
of ignition of the gas, or into the chimney according to the type of lamp to which our
improvements are applied, a suitable projection being employed to effect the spreading
of the flame. The space between the gas tube and the cold air feeder forms the
burner.
In some cases we obviate the choking by leaving the end of the gas pipe where the
gas is ignited free from any obstruction either inside it or beneath it in which
arrangement the air is supplied in the way usual in regenerative gas lamps.
1 1
1007
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.

page_text: Improvements in or Applicable to Regenerative Gas Lamps or
Lanterns.
We, SAMUEL CHANDLER, Junior, and JOSIAH CHANDLER, both of Central Works,
Kennington Oval, in the County of Surrey, Gas Engineers, 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 :-
This Invention is designed to obviate the objectionable carbonaceous deposit in the
orifice of the burner which often takes place in regenerative gas lamps owing to the
high temperature to which the gas is raised before it issues from the burner.
For this purpose we employ a cold air feeder or cooler which cold air feeder or
,cooler consists of a pipe or pipes adapted to convey air from outside the lamp through
the gas supply pipe; such cold air egresses near the point of ignition of the gas or
into the chimney according to the type of lamp to which our improvements are applied,
a suitable projection being employed to effect the spreading of the flame. The space
between the gas tube and the cold air feeder forms the burner.
In some cases we obviate the choking by leaving the end of the gas pipe where the
gas is ignited free from any obstruction either inside it or beneath it in which
arrangement the air is supplied in the way usual in regenerative gas lamps.
In the accompanying drawings figure 1 represents a sectional elevation of a
regenerative gas lamp arranged according to our invention with combined gas
burner and cold air feeder; figure 2 shews a similar arrangement in which however
the ingress and egress of the cold air is differently provided for and figure 3 is a
sectional elevation of a regenerative gas lamp illustrating our alternative arrangement
for preventing choking of the burner.
Referring to figure 1, a, represents the body of the lamp; b, the hinged glass
globe; c, c, the chimney; d, d, the heated air chamber all of which parts may be of
ordinary construction; e, is the gas supply pipe and is our cold air feeder or cooler
which in this arrangement consists of a pipe the lower end of which extends a certain
distance below the end of the gas supply pipe e, and the upper end opens at into
the chimney c. h, is a bell mouth or funnel at the bottom of the air cooler to facilitate
the up current of cooling air; the bell month h, may be advantageous provided with
a ring of holes at ', . The lower end of the space between the gas pipe e, and our
cold air feeder or cooler may form the burner, that is to say, the orifice through which
the gas issues to be ignited; //", are set screws which we find it advantageous to
employ in order to adjust and fix in position our air cooler f, in relation to the gas
tube e, so as to obtain a true and uniform flame.
By this arrangement it will be seen that the outside air for the combustion enters
the heating chamber d, as shewn by the dotted arrows. The outside air also enters
the lamp as shewn by the arrows and passes downwards into the glass globe and while
in a cold or comparatively cold state passes up through our cold air feeder or cooler /,
thereby preventing the gas from reaching a high temperature and avoiding to a
considerable extent any carbonaceous deposit and the consequent choking of the
burner.

page_text: In some cases our cold air feeder or cooler, may be extended (as shown by the
dotted lines) through the bottom of the glass globe b, in which case the cold air enters
the cooler direct instead of first passing into the globe as above described.
Figure 2 represents an arrangement of cold air feeder or cooler which is arranged
so that the cooling air that is conveyed through the gas pipe egresses at or near the
point of ignition of the gas. This is effected by causing the upper end of the cold air
feeder to extend to the outside of the lamp by means of a T piece or otherwise. In
this case the cold air from the outside is drawn down through the cold air feeder f
and egresses at the lower orifice of the feeder. The bell mouth may have its form varied
in this arrangement so as, if desired, to supply this cold air in an advantageous
manner to the flame.
In the arrangement of regenerative gas lamp shewn in figure 3, the lower end e¹, of
the gas pipe e, where the gas is ignited is left free from any obstruction either inside
it or beneath it the other parts of the lamp being of known construction. This
arrangement we have found suitable for the smaller class of lamps and all choking by
carbonaceous deposit is obviated. The arrows shew the direction of the air currents.
We are aware that the general type of regenerative gas lamps to which our
improvements relate is old and well known and it will be understood that our
invention relates only to the specific improvements hereinbefore described and herein-
after claimed alone or in combination with the other parts of the lamp.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. In a regenerative gas lamp or lantern the use of a cold air feeder or cooler in
combination with the gas supply pipe substantially as and for the purpose hereinbefore
described.
2. In a regenerative gas lamp or lantern the method of preventing carbonaceous
deposit at the point of combustion by leaving the end of the gas pipe where the gas is
ignited free from any obstruction either inside or beneath it substantially as herein-
before described.
3. The use of the set screws f, in combination with the tubes e, and f, for
regulating the gas orifice substantially as hereinbefore described and illustrated
in figure 1.
4. The improved arrangement of regenerative gas lamp hereinbefore described and
illustrated in figure 1 of the accompanying drawings.
5. The improved regenerative gas lamp hereinbefore described and illustrated in
figure 2 of the accompanying drawings.
6. The improved regenerative gas lamp hereinbefore described and illustrated in
figure 3 of the accompanying drawings.
Dated the 28th day of March 1887.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.