Improvements in Overhead Regenerative Gas Lamps.
Year: 1895

page_text: Date of Application, 26th Apr., 1895-Accepted, 1st June, 1895
COMPLETE SPECIFICATION.
Improvements in Overhead Regenerative Gas Lamps.
We, THE LAMP MANUFACTURING COMPANY LIMITED, of 12 and 14 Leonard
Street, City Road, in the City of London, and WILLIAM HENRY ISAAC WELCH,
of 68 Coborn Road, Bow, in the County of London, Lamp Maker, 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 relates to overhead regenerative gas lamps of the kind described
in the Specification of Patent No. 123 of 1893 and has for its object the
construction of lamps of this kind in such a manner as to give great facility of
access for lighting and cleaning as we shall describe referring to the accompanying
drawings which show a lamp according to this invention suitable for the roof of a
railway carriage.
Fig. 1 is a vertical section, Fig. 2 is a sectional plan on X X of Fig. 1, and
Fig. 3 is a plan of the gas pipe hinge joint.
The gas is supplied through a joint A which is of ordinary construction; it is
supported on fixed pins a which enter holes in its ends. The gas pipe is attached
to and passes through the centre of a dished piece B the upper part B of which
is connected to its lower part or disc B' by several tubular bosses b.
On the gas pipe which extends down to the burner C is screwed a perforated
hollow cone D which presses an inverted hollow conoid E up against the disc B¹.
All the parts, B, B¹, C, D, E and the gas pipe from A, as well as the chimney F
which rests on B can be turned upwards on the joint A as a hinge, giving free
access to the parts below. The glass globe G may be hinged in the usual way but
as access is got from above, it may be fixed as shewn by a ring g to the stationary
part H into the upper mouth of which fits the upper rim of B which forms a lid
or cover to H.
At the side of H two brackets project upwards to form bearings for the
pins a which are fixed in arms b' projecting upwards from B.
The pius a as above mentioned project into holes in the gas joint A, which
relieved from the weight of B and the parts attached to it, that weight being
supported on the brackets h¹.
The reflector R may have attached to it a conical shell projecting up from it ;
it has a lip resting on the inwardly projecting lip h at the lower part of H.
The outer casing of the lamp consists of a lower part I which is stationary and
has hinged to it at i and fastened by a catch at all the upper part J which is
provided in the usual way with shielded apertures for ingress of air and egress of
products of combustion, the whole forming a windguard of ordinary construction,
which may be dispensed with when the lamp is used as a ceiling lamp not subject
to external air currents.
On releasing the catch the upper casing J can be turned back on the hinge i,
the gas pipe and parts attached to it can be turned back on the joint A, the
reflector R and its conical shell r can be lifted out, and free access is thus given to
the interior of the glass G for cleaning.
The reflector R being replaced, the burner C being lighted and the parts B.DE
being turned down into the position shewn in Fig. 1, the lamp operates as follows.
Part of the air entering at the shielded apertures K passes down to perforations
at k by which it enters the globe to supply the underside of the flame, and part
passes through the bosses and the perforated cone D to supply the upper side of

page_text: the flame. The products of combustion ascend between E and and pass inwards
through the intervals separating the bosses to the chimney F. As the
parts B Band E are highly heated by the products of combustion, the air passing
in contact with those parts reaches the flame at a high temperature causing
complete combustion and great brilliancy of light.
In many cases it is convenient to provide for lighting the burner without having
to turn up the interior parts on the hinge A. For this purpose we form the part B
with an aperture provided with a hinged lid as indicated by the dotted linee L,
which can be turned up to allow of a torch being introduced to reach the
burner.
Although in the drawing the axes of the hinges A i and L are all shewn
parallel to one another, it is to be understood that they might be situated in
different positions horizontally so as to give convenient access to the different parts
of the lamp.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
1. An overhead regenerative gas lamp, constructed and operating substantially
as described with reference to the drawings.
2. In a lamp such as is above referred to, a gas joint constructed and supported
substantially as described with reference to Fig. 3.
3. Attaching the parts containing the passages for air and products of combustion
and carrying the chimney to the hinge coinciding with the joint of the gas pipe,
so that they may be all turned thereon to expose the interior, substantially as
described.
4. The construction of the parts B and B¹ connected by the tubular bosses b,
so as to give passage for air through the bosses and for products of combustion
around and between the bosses, substantially as and for the purpose set forth.
5. The opening L with hinged cover giving access for lighting substantially as
described.
Dated this 26th day of April 1895.
ABEL & IMRAY,
Agents for the Applicants.