Year: 1886

page_text: I, RICHARD THOMAS STRANGMAN of 101 Leadenhall Street, in the eity of London
in the County of Middlesex, Gentleman do hereby declare the nature of this Invention
to be as follows:-
The object of my invention is to form improved reflecting lamps or lanterns by
combining certain parts and apparatus with the improved burners for which the
Letters Patent No. 84 dated 7th January 1881 and No. 2971 dated 14th June 1883
were granted to Sir James Nicholas Douglass, and also with the improved burner for
which a joint application for Letters Patent No. 10,675 dated 20th August 1886 has
been filed by the Patent Argand Gas and Oil Burners Company Limited, and myself.
My said lamp or lantern inay be constructed either to reflect the light downwards,
or to reflect it horizontally, or at any desired angle.
In the first form it is more particularly adapted for the general illumination of open
spaces, buildings, shops, rooms or other apartments, while in the other forms it is
chiefly intended for use as an outside shop window lamp or for illuminating passages,
and for other like purposes.
The reflecting part of the lamp is formed of metal and is in section somewhat of a
semi-elliptic form, the reflecting surface is preferably obtained by means of enamelling,
but silver plating or other suitable process may be employed for this purpose.
When constructed as a downward reflecting lamp, the reflector is arranged horizon-
tally and forms the top of the lamp. A metal chimney is provided in the centre and
the top of the glass chimney of the burner enters this metal chimney, so that the
latter practically forms a continuation of the glass chimney. The burner is suspended
within the lamp by two or more parallel tubes affixed to the reflector, the lower ends
of the said tubes being bent or adjusted inwards to meet the burner. Similar tubes
are joined or affixed to the said tubes, outside the reflector, their upper ends being
bent or adjusted inwards over the top of the metal chimney and then connected
to the gas supply pipe.
A glass bowl or globe of suitable form, is hinged or attached to the reflector and
encloses the burner, an opening is provided in the bottom of the said bowl for the

page_text: admission of air to the burner and the tap for turning on the gas to the burner pro-
jects through the said opening. In some cases I suspend the said bowl by chains and
counter balance weights from the reflector, so that it may be readily drawn down for
lighting or cleaning the lamp.
.
The gas in passing through the suspended tubes is considerably heated in those
parts of the said tubes which are immediately over the top of the chimney, and is
kept hot in its passage to the burner by reason of the proximity of the said tubes to
the sides of the metal and glass chimnies.
To increase such heating effect, I sometimes provide a gas chamber or reservoir in
connection with the said tubes, just above the top of the metal chimney, or I may coil
the said tubes above or around the said chimney.
I also sometimes provide an outer casing to the metal chimney or reflector which
casing encloses the aforesaid small gas tubes passing down or around the sides of the
said chimney.
The air supplied to the burner may be first heated by being caused to pass between
the said casing and the exterior of the chimney and reflector, and in this case I prefer
to provide no opening in the bottom of the glass bowl or globe as aforesaid.
may in some cases provide a projecting rim or flange to the reflector to form an
additional reflecting surface beyond the glass bowl or globe.
When my improved lamp is arranged as an outside shop window lamp, or for similar
purposes, the reflector is arranged in a nearly vertical position, the burner is placed
inside the reflector so that the flame shall be practically in the focus of the reflector,
the metal chimney is situated near the upper edge of the reflector, instead of in the
centre as heretofore, and the front of the reflector is closed by a sheet of glass set in a
frame and hinged or otherwise attached thereto.
The burner may be suspended within the lamp by means of tubes as before described,
but in the construction of this form of any improved lamp, I generally prefer to
provide an aperture in the lower part of the reflector through which the gas is brought
directly to the burner.
Although so far described as constructed to burn gas, my improved lamps or lanterns
are equally applicable for oil.
The oil reservoir may conveniently be placed on the top or at the back of the reflector
or in any other suitable position, according as the lamp is inade in the first or second
form.
The metal chimney which practically forms a continuation of the glass chimney
enables a solid flame to be obtained reaching from the top of the burner to the
underside of the reflector where the glass chimney enters the metal chimney and by
means of the combination of parts herein described I obtain in my improved lamps or
lanterns a very high illuminating effeciency from the gas or oil therein consumed.
When my improved lamps or lanterns are employed for outdoor purposes, or in
other positions where they are exposed to draughts of air, I place a tube forined of finely
perforated metal or wire-gauze and closed at the upper end, on the top of the metal
chimney, a tube surrounds the said perforated tube, an annular space being left between
the two tubes.
This apparatus affords free exit for the products of combustion, but effectually
prevents the flame from being affected by wind or draughts.
Any rain which may chance to enter the perforated tube is caught by an inclined
edge and conducted to the outside of the lantern.
1000
AMBROSE MYALL, C.E.,
Agent for the Applicant.

page_text: Improvements in Reflecting Lamps and Lanterns.
I, RICHARD THOMAS STRANGMAN of 101 Leadenhall Street in the city of London,
in the county of Middlesex, Gentleman 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 :-
The object of my invention is to form improved reflecting lamps or lanterns by
combining certain parts and apparatus with the improved burners for which the
Letters Patent No. 84 dated 7th January 1881 and No. 2971 dated 14th June
1883 were granted to Sir James Nicholas Douglass, and also with the improved
burner for which a joint application for Letters Patent No. 10675 dated 20th August
1880 has been filed by The Patent Argand Gas and Oil Burners Company Limited
and myself.
The said burners, or any of them, are hereinafter referred to as the "Douglass "
burners, or burner.
My said lanp or lantern may be constructed either to reflect the light downwards,
or to reflect it borizontally, or at any desired angle.
In the first form it is more particularly adapted for the general illumination of open
spaces, buildings, shops, rooms or other apartments, while in the other forms it is
chiefly intended for use as an outside shop window lamp, for illuminating passages,
for railway signal lamps, and other like purposes.
In the accompanying six sheets of drawings, Fig. 1 is a sectional elevation of a
downwardly reflecting lamp constructed according to my invention.
Fig. 2 is a front elevation, Fig. 3 a side elevation, Fig. 4 a side sectional elevation
and Fig. 5 a sectional plan through the line Y, Y, in Fig. 4 of an outside reflecting
shop window lamp constructed according to my invention.
Fig. 6 is a sectional elevation of a railway signal lamp constructed according to my
invention.
Similar letters of reference denote similar parts throughout the drawings.
The reflecting part of the lamps is formed of metal and is in section somewhat "of
a semi-elliptic forin, the reflecting surface is preferably obtained by means of enamelling,
but silver plating or other suitable process inay be employed for this purpose.
When constructed as a suspended downwardly reflecting lamp, as shewn in Fig. 1,
the reflector A is arranged horizontally and, affixed to the body B of the lamp at the
outer edge. A metal chimney C is provided in the centre of B and the top of the
glass chimney D of the "Douglass "burner E enters this metal chimney, so that
the latter practically forms a continuation of the glass chimney, as well as serving to
effectually support it in position. The burner E is suspended within the lamp by two
or more parallel tubes F affixed to the body B, the lower ends of the said tubes being
bent or adjusted inwards to meet the burner as shewn. Similar tubes F1 are
joined or affixed to the said tubes F outside the body B, their upper ends being bent

page_text: or adjusted inwards over the top of the metal chimney and then connected to the gas
supply pipe J. A glass bowl or globe K, of suitable form, is hinged or attached by
the catches K¹ to the lamp and encloses the burner.
An opening is provided in the bottom of the said bowl for the admission of air to
the burner and the tap L for turning on the gas to the burner projects through the
said opening. I may, if preferred, suspend the bowl K by chains and counter balance
weights from the lamp, so that it may be readily drawn down for lighting or cleaning
the lamp.
M is an ornamental outer metal casing enclosing the metal chimney C and tubes F¹,
and N is an ornamental rim surrounding the edge of the reflector. The said casing
and rim may be of any suitable pattern.
The gas in passing through the suspending tubes F, F', is considerably heated in
those parts of the said tubes which are immediately over the top of the chimney, and
is kept hot in its passage to the burner by reason of the proximity of the said tubes
to the sides of the metal and glass chimnies.
To increase such heating effect, I may provide a gas chamber, or reservoir, in
connection with the said tubes, just above the top of the metal chimney, or I may
coil the said tubes above or around the said chimney.
The air supplied to the burner inay be previously heated by being caused to pass.
between the casing M and the exterior of the chimney C and between the body B and
the reflector A, and in this case I prefer to provide no opening in the bottom of the
glass bowl or globe as aforesaid.
The projecting rim or flange N may be shaped so as to form an additional reflecting
surface byond the glass bowl or globe, if desired.
In the outside reflecting shop window lamp, shewn in Figs. 2, 3, 4 and 5, the
reflector A is arranged in a nearly vertical position; the " Douglass" burner E is placed
inside the reflector, so that the flame shall be practically in the focus of the reflector,
and the metal chimney C is situated near the upper part of the reflector, instead of in
the centre, as in the previous example. B is the outer casing of the lamp, having an
outer or second chimney M surrounding the chimney C. The reflector A is secured
in the casing B, leaving a space between as clearly shewn in Fig. 4, and the front is
closed by a sheet of glass K set in a frame O, which is hinged to the casing at K¹
and secured by a catch or other suitable device at K2. The sides and bottom of the
frame contain pieces of bent glass, P, P³, P². Air is supplied to the burner through
perforations at Q covered with wire gauze and perforations are provided at R for the
escape of hot air from the top of the lamp, a hood R¹ being employed to keep out
rain &c.
The burner E may be suspended within the lamp by means of tubes as before
described in reference to the downwardly reflecting lamp, but in the construction of
this form of my improved lamp, I prefer to provide an aperture in the lower part
of the reflector A and casing B, through which the gas is brought directly to the
burner. In the drawings a socket S is shewn affixed to the back of the casing B for
attaching the lamp to a suspending supply pipe J in the usual manner, the buruer
being directly connected to the said socket. The top of the chimney M is provided
with a perforated cap T, having a closed lop T', a short tube T is supported outside
the cap T, so that an annular space is left between. This apparatus affords free exit
for the products of combustion, but any outside current of wind or draught is simply
deflected up or down through the annular space, as indicated by the arrows in Fig. 4
and does not gain access to the interior of the chimney or lamp to affect the flame.
Although so far described as constructed to burn gas, my improved lamps or lanterns
are equally applicable for oil. The oil reservoir may conveniently be placed on the
top or at the back of the reflector, or in any other suitable position, according as the
lamp is made in the first or second form.
In Fig. 6 the second form of my improved lamp is shewn adapted to a railway
signal lamp. B is the outer casing of the lamp with a hinged top B¹ secured by a
catch B in the usual manner. U is a circular oil reservoir fitting in the recess U³ in
he bottom of the lamp and provided with a lug U² entering a notch U³ to prevent

page_text: the reservoir becoming displaced. E is a "Kosmos" oil burner provided with the
cones and other improvements shewn and described in the aforesaid specification
No. 10675 of 1886.
The reflector A is mounted for vertical adjustment upon a standard A¹. The glass
chimney D passes through an opening in the upper part of the reflector and enters
the bottom of the short metal chimney C.
Air is supplied to the interior of the lamp by small perforations in the bottom at Q
in such a manner that the supply is not affected by wind or draughts, while at the
same time rains cannot enter the said perforations. Wire-gauze may be placed over
them as an additional precaution if desired.
The wind and rain guard at the top is substantially the same as that shewn with
reference to the outside shop window lamp and consists of a perforated cap T with
closed top T and an outer tube T². An additional feature is the inclined ledge T³,
which will catch and conduct away through the lowermost perforations any rain which
by chance may reach the inside of the cap T. V is the usual front lens and V¹ the
lens for the back light, both being provided with means for adjustment in line with
the burner. A socket W is provided on the lanp casing through which the device W¹
for operating the lamp wick projects, thus enabling the wick to be raised or lowered
without opening the lamp.
It is obvious that if desired a " Douglass " gas burner may be employed in this
lamp in place of the oil burner as shewn.
In the various forms of lamps above described the metal chimney, which practically
forms a continuation of the glass chimney, enables a solid frame to be obtained reaching
from the top of the burner to the underside of the reflector, where the glass chimney
enters the metal chimney and by means of the combination of parts herein described,
I obtain in my improved lamps or lanterns a very high illuminating effeciency from
the gas or oil therein consumed.
I wish it to be understood, that the three forms of lamps, which I have shewn and
described are given as types of my invention and that I do not necessarily confine
myself to the uses, nor to the exact details of shape or pattern therein set forth.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:-
(1) In a suspended downwardly reflecting, or similar class of lamp, the combination
of a Douglass" gas or oil burner, with a reflector A, casings B and M, chimney C,
tubes F and F and globe K, substantially as herein described and shewn with reference
to Fig. 1, of the accompanying drawings.
EE
(2) In a reflecting shop window, or similar class of lamp, the combination of a
Douglass "gas or oil burner with a reflector A, onsings B and M, chimney C, wind-
proof top T, T, T and frame O with glasses K and P, P¹, P³, and perforations Q
and R, substantially as herein described and shewn with reference to Figs. 2, 3, 4 and 5
of the accompanying drawings.
'
(3) In a railway signal, or similar class of lamp, the combination of a " Douglass "
gas or oil burner, with a reflector A, chimney C, perforations Q and wind-proof
top T, T, T2, T3, substantially as herein described and shewn with reference to Fig. 6
of the accompanying drawings.
Dated thie 25th day of June 1887