Improvements in Overhead or Roof Lamps.
Year: 1890

page_text: Date of Application, 13th Nov., 1890.
Complete Specification Left, 29th Aug., 1891-Accepted, 3rd Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Overhead or Roof Lamps.
I, WILLIAM HENRY ISAAC WELCH, of 68, Coborn Road, Bow, in the County
of London, Lamp Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in overhead lamps principally of the
kind used for lighting railway carriages and known as carriage roof lamps.
In carrying out my invention I employ a suitable outer case or lantern having
the usual hemispherical or other suitably shaped glass or bowl at the lower end.
Within the outer case or lantern I fit an inner casing in such a manner that it may
be easily removed when required. From the central portion of the bottom of the
inner case hangs a well or chamber; the annular portion of the bottom of the inner
casing between the sides of the well or chamber and the side of the casing is of a
curved or other suitable form and serves as a reflector.
The said well or chamber extends downwards into the glass bowl and receives
the oil receiver or tank, a small space being left between the oil receiver and the
chamber so that any overflow or drip from the oil tank will be collected.
I place the burners of my lamp at an angle extending outwards, the upper
ends of the cones passing through openings in the hanging well or chamber so that
the flame projects outside into the space between the said well and the glass bowl.
Each burner is enclosed within its own box or chamber cach box having a lid
adapted to open inwards so as to give access for trimming the wick and for lighting
and cleaning purposes.
In some cases it may be advantageous to connect the cones
with the said lids so that when the lids are opened the cones will be raised from the
burners.
I employ a chimney for each burner, such chimneys passing from the outer
portion of the annular reflector through the inner casing the upper ends opening
into second chimneys placed at an angle so as to convey the products of combustion
into the upper portion of the outer case or lantern, whence they pass out into the
air in any usual manner.
It will be understood that the oil receiver with the burners, cones and other
parts of the lamp proper can be withdrawn vertically to allow of supplying oil to
the lamp and for other purposes.
I find it advantageous to make the sides of the orifice or slot in the upper portion
of the cones through which the flame passes of unequal height, and in some cases,
instead of the cones passing through openings in the hanging well or chamber, I
make each cone in two parts that part which projects being fixed to the outside of
the hanging chamber, the other part being movable.
Dated the 13th day of November 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Overhead or Roof Lamps.
I, 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 improvements in overhead lamps principally of the
kind used for lighting railway carriages and known as carriage roof lamps.

page_text: The accompanying drawing is a vertical section of a lamp according to my
invention. A is the outer case or lantern carrying the usual hemispherical or other
suitably shaped glass or bowl B. Within the outer case or lantern A. I fit an inner
casing C in such a manner that it may be easily removed when required. As
shown in the drawing it rests on an inwardly projecting flange a.
From the central portion of the bottom of the inner case C hangs a well or
chamber D; the annular portion of the bottom of the inner casing between the
outside of the well D and the inside of the casing C is of a curved or other suitable
form and serves as a reflector.
The well D which is preferably enamelled outside to aid reflection extends
downwards into the glass bowl and receives the oil reservoir F a small space being
left between the reservoir and the well to receive any overflow or drip. Such
space however being in many cases unnecessary the whole of the lower part of the
well may be occupied as reservoir.
I place the burners G of which there may be two or more at an angle extending
outwards, the upper ends of the air cones y passing through openings in the side of
the well D so that each flame projects outside into the space between the well and
the glass. Each burner is enclosed within its own box or chamber G which is
made with a hinged lid g¹ that can be opened inwards so as to give access for
trimming the wick and for lighting and cleaning purposes. It is preferred to
connect the cones g with the lids g¹ so that, when the lids are opened, the cones are
raised from off the burners. The connection however is preferably of a free kind
as shewn so as to let the cone and lid seat independently.
I employ a chimney H for each burner, these chimneys passing from the outer
portion of the annular reflector E up the inner casing C and their upper ends
opening into second chimneys K placed at an angle so as to convey the products
of combustion into the upper portion of the outer case or lantern A whence they
pass out into the air through suitable openings wind guarded in any usual
manner.
The oil reservoir F with the burners & cones g and other parts of the lamp
proper can be withdrawn vertically from the well D to allow of supply of oil and
for other purposes.
I find it advantageous to make the upper side g³ of the slot in the face of the
cone g through which the flame passes project farther than the lower side g² as
this causes the flame to sweep somewhat downwards before ascending to the
chimney H.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
An overhead or roof lamp having suspended within the glass bowl a well
containing the lamp proper with two or more burners projecting obliquely through
the sides of the well under suitable chimneys, substantially as described.
Dated this 25th day of August 1891
ABEL & IMRAY,
Agents for the Applicant.