Improvements in Lighting Appliances.
Year: 1889

page_text: Date of Application, 27th Nov., 1889
Complete Specification Left, 26th Aug., 1890-Accepted, 27th Sept., 1890
PROVISIONAL SPECIFICATION,
Improvements in Lighting Appliances.
We FREDERICK GITTINGS ROWSON and JAMES ROWSON of 74 Thomas Street, in the
City of Manchester, County of Lancaster, Plumbers, do hereby declare the nature of
this invenion to be as follows:-
"
"
Our invention relates to the gas lighting appliances of the so termed sun light
type and to arrangements in connection with lamps employed for lighting purposes.
In certain forms of such sun lights a cluster of burners is arranged below a conical
or basin shaped reflector having a central opening for the upward escape of the heated
air. Owing to the form of such reflector the reflected rays converge so that the lighting
effect of the gas flames is not much increased. In lieu of the basin shaped reflector we
use a flat or nearly flat plate or disc having a central opening to carry off products of
combustion as is usual. The said plate may be flat for some distance outward from the
central opening and have a moulded or rounded edge projecting a little beyond the general
face of the plate and curling backward or upward or bevelled on its periphery or the
plate may be slightly dished or coned. The burners are by preference arranged so as
to incline upward and outward from the central pipe or ball and are brought nearer
to the reflector than in the old construction so that the reflective power of the plate
is increased the increased heat of the plate preventing the permanent accumulation
thereon of dust or carbonaceous matter. The central opening in the plate may be
connected with a pipe or flue whereby the heated air and products of combustion
are conveyed away as is usual, In some cases we substitute lamps for the gas
burners.
DL: 021 1
T
L
1000
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.
COMPLETE SPECIFICATION.
Improvements in Lighting Appliances.
We FREDERICK GITTINGS Rowson and JAMES ROWSON of 74 Thomas Street in the
City of Manchester County of Lancaster Plumbers 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 and accompanying
drawing :-
"
Our invention relates to the gas lighting appliances of the so termed " sun light
type and to arrangements in connection with lamps employed for lighting purposes.
In certain forms of such sun lights a cluster of burners is arranged below a conical
or basin shaped reflector having a central opening for the upward escape of the
heated air. Owing to the form of such reflector the reflected rays converge so
that the lighting effect of the gas flames is not much increased. In lieu of the
basin shaped reflector we use a flat or nearly flat plate or disc having by preference
a central opening to carry off products of combustion as is usual. The said plate
may be flat for some distance outwards from the central opening and have a moulded
or rounded edge projecting a little beyond the general face of the plate and curling
backward or upward or bevelled on its periphery or the plate may be slightly
dished or coned. The burners are by preference arranged so as to incline upward
and outward from the central pipe or ball and are brought nearer to the reflector
than in the old construction so that the reflective power of the plate is increased
the increased heat of the plate preventing the permanent accumulation thereon of
dust or carbonaceous matter. The apparatus may be used in connection with a
..מ

page_text: pipe or flue whereby the heated air and products of combustion are conveyed away
as is usual.
The nature of our invention will be clearly understood with the aid of reference
to the accompanying drawing which represents a cluster of six burners provided
with our improved reflector. In the said drawing a a are the burners and b b
is the reflector represented in section in order to show its formation more clearly.
The burners are carried by branches c which radiate from a central ball d as is
usual. The reflector is made of sheet metal stamped into form and coated with
glass enamel as is usual the surface next to the lights being finished with a white
glaze as is usual the novelty consisting in the general form of the reflector. It
will be seen that the central part 6 of the reflector is flat and that this flat portion
is bounded by a curved edge b¹ which projects to a comparatively small extent
from the flat part 6 in a direction downward or toward the burners.
In the centre of the reflector is an opening e for the upward escape of a
portion of the heated air and products of combustion. This opening is comparatively
less than the escape opening in the ordinary basin shaped reflector the intention
being that only part of the upward current of heated gases shall pass through
such opening the other and probably greater portion flowing around the edge b
of the reflector. Perforations in the plate might take the place of the central
opening. The flowing of the currents partly through the said opening or perforations
and partly over the edge of the reflector as indicated by the arrows increases the
steadiness of the flames. The heated gases and products of combustion escaping
past the edge b¹ may be conveyed away by means of an escape pipe indicated by
the dotted lines f.
The burners are inclined away from the central vertical axis of the ball d so
that the tips of the flames are directed toward the edge 6' of the reflector. There
may be less or more than six burners in the cluster.
The reflector being only removed a short distance from the cluster of flames
becomes highly heated and as a consequence does not retain smoke deposit. Other
advantages arising from the close proximity of the reflector to the flames are that
the light is better reflected and that the heat being also reflected downward toward
the burners and the ball d the issuing gas and the air which come into contact with the
flames become heated to a higher degree as compared with the ordinary combination
whereby the effective duty of the burners is increased. We might employ a corrugated
reflector so long as the general plate shape were retained. We do not confine ourselves
to the coating of the reflector with glass enamel as other white coating might be found
to have the desired effect.
We are aware that a basin shaped reflector formed without the central opening e has
been used in close proximity to a cluster of flames prior to the date of our invention
but we do not include the use of such basin shaped reflectors in our claims hereunder.
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. The combination with a cluster of inclined burners a of the reflector b b as set
forth and indicated herein before and in the accompanying drawing.
2. The plate shaped reflector in combination with a cluster of burners the whole
formed and combined substantially as and for the purpose set forth and indicated.
Dated this 25th day of August 1890.
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.