Improvements in connection with Incandescent Burners and Lamps suitable for the same.
Year: 1897

page_text: Improvements in connection with Incandescent Burners and Lamps
suitable for the same.
JOSEPH BAMFORD, Market Street, Lichfield, Engineer, do hereby declare the nature
of this invention to be as follows:-
This invention consists first in making a lamp with an inner tube to act as a
chimney and to construct over this chimney another tube both of which have a cover
or covers to prevent down draught and wet from entering.
Outside these I construct a further covering which may be made of one or more parts,
and this also is protected by a covering. The object of this outer covering is to keep
the outer portion of the lamp cool. Preferably an air space is allowed for between
this outer covering and the centre tube to admit air & take away heat from the
globe. I may carry the said covering over the are globe hereinafter mentioned, the
lower part of the said covering being preferably of a dome shape to encircle the globe
acting then as a shade & keeping the wind & wet from entering the globe.
Extending from one of the tubes, preferably the centre one I provide a skeleton frame
or plate for carrying the usnal are shape globe, which globe is fastened by hooks or
flanges.
At the top of the globe I may use a reflector plate which by preference is hollowed,
or of any other shape and may also be detachable. Inside the before mentioned
lamp I suspend by means of gas pipe one or more incandescent burners, the said gas
pipe being so constructed to have a long arm and a short one, the long arm being
taken to nearly the bottom of the globe through the centre tube in order to carry the
burner, and the shorter one which need not necessary be of gas pipe is carried to the
bottom of the centre tube both pipes fitting close to the sides of the said tube &
which latter is supported by means of studs fixed in the gas pipes.
At the bottom of the arc globe which is made in one piece I provide a hole or holes
to admit air & through which may be inserted a rod for turning on & off the bye pass.
Further this invention also consists in providing means for protecting an incandescent
burner from injury by wind & for keeping the light steady and I do this by
covering in all the lower parts of the burner including the air holes of the Bunsen
burner. The covering may be made of any material solid or perforated or trans-
parent.
Also above the chimney or globe I use a covering for preventing a down draught
and the same may be made in a variety of ways. I fit it loosely on the top of the
chimney or globe or make it to slide up & down a support.
The globe or chimney may be supported below the ordinary ring provided upon
the burner if so desired.
Another part of this invention consists in providing a frame or support for the
incandescent mantle to rest upon or against in order to keep it in position and
preventing its moving about & from contracting.
Dated this 22nd day of February 1897.

page_text: Improvements in connection with Incandescent Burners and Lamps
suitable for the same.
I, JOSEPH BAMFORD, of Market Street, Lichfield, in the County of Stafford,
Engineer, 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 consists of making an are lamp to be used in connection with
incandescent burners together with certain improvements in connection with such
burners. In carrying out this invention reference to the various figures will show
the method employed.
(1.) A suspended are lamp is shown in full in Figure 1, the various fittings being
slightly indicated by dotted lines. The several letters of reference are to be taken
in connection with the more detailed and larger scale drawing of Figure 2 with
which such parts and letters correspond.
(2.) In Figure 2, on a suspended gas pipe G I fix a tee piece T and from one of the
double ends depends a gas tube g¹ which is prolonged to the incandescent burner,
and from the other end of the tee piece T depends a shorter tube or rod g²
parallel with g¹. These two tubes serve as supports for the various fittings to be
placed thereon, only one of these tubes being connected to the burner, the object being
to obstruct the light as little as possible. Between these two parallel supports I place
a tube A whose lower end rests on the studs or pins a³ which project from the
supports gl and g². At a convenient distance above the top of the tube A I fix a
circular plate a¹ by means of tags as at a² this plate being notched where it engages
with the supports near their upper bends. The object of this plate will be described
later. Around the outer sides of the supports gl and g² I fix a tube or cylinder B
which is held in position at its base by the studs 62 which form a part of the
supports 91,92. The studs 2 are placed at a convenient distance below the studs a³.
The upper end of the tube B is carried some distance beyond the upper end of the
tube A and into this upper end of the tube B is fitted a flanged shorter section 1,3
which may be removed for the fitting of the outer reflector R which as will be seen
in this case forms also a further outer tube encircling the tube B.
3. To the outer portion of the tube B I affix a skeleton frame F of three or more
arms, which arms carry a circlet (for the purpose of sustaining the are globe D.
This globe D is preferably fitted at its upper end with a metal ring which is passed
inside the circlet O and by means of studs affixed to D is fastened to hooks
dependent from the inner portion of the circlet O. These hooks are not shown in
the drawing.
An inner reflector S, preferably removeable, is provided, supported by the studs 62
and between its upper edge and the circlet O a space is left for the outer air current
to enter as indicated by the curved arrows at that point. If desired the reflector
plate may be perforated and continued to the circlet..
(4.) An outer covering R preferably of dome shape and terminating in a tubular
top as before mentioned, is placed over the skeleton frame upon which it rests and
its tubular upper end is prolonged to within a convenient distance of the flanged
section. The plate a mentioned as fixed above the tube A is intended to check
direct down currents of cold air, but occupying only a restricted portion of the area
of the tube A a sufficient space is allowed to permit of the consumed gas and air to
pass upwards into the space covered by the outer metal cap H. This cap H, together
with the plate a¹, the outer covering R, and the arc globe D, prevent the incandescent
burner from being injuriously affected by sudden gusts of air and in their several

page_text: cases prevent the entrance of wet or dust, while allowing the products of combustion
to pass away in an upward direction. It will also be seen that the columns of air
contained between the tubes A and B as also between B and R act as non-conductors
of heat, and thus the outer tube and shade R are kept cool.
The burner or burners is, or are of the usual kind and the chimney around the
mantle projects a convenient distance within the lower end of the tube A.
Figure 3, shows a sectional view of the upper portion of the tubes A, B and R
together with the supports g¹ and g² and likewise the studs a3 and 62, the
non-conducting air spaces being as above described.
At the bottom of the are globe I provide one or more holes through which wires
or cords may be passed by means of which the bye pass is regulated and the gas
turned on or off as required, or the same may be effected by working the bye pass
with a rod or otherwise.
(5). Figure 4 shows the method employed to protect the incandescent burner and
to prevent sudden rushes of air affecting the same, it also effects the distribution
of the air with the gas in a more efficient manner. In this Figure 4 I represent a
perforated cover M.
(6). Figure 5 represents a further subject in connection with incandescent burners,
V shows the support of the mantle with the usual fork at the top, v shows certain
projections or arms for supporting the mantle from the inside, or for the mantle to
rest against. Such arms are here shown as placed towards the top of the support or
crutch V, but sometimes I vary the position of these arms or projections.
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.) An arc lamp constructed for use in combination with incandescent burners as
shown and described and for the purposes specified.
(2.) In an arc lamp in combination with incandescent burners the outer covering
with its non-conducting air space for the purposes specified substantially as drawn
and described.
(3.) In an arc lamp for use with incandescent burners a skeleton frame for carrying
the globe substantially as described and drawn.
(4.) In combination with incandescent burners the covering of the lower parts
of the bunsen burners for the purpose specified as drawn and described.
(5.) In combination with an incandescent burner a mantle support for the purpose
specified as drawn and described.
(6.) In an incandescent arc lamp, a gas pendant as drawn and described.
Dated this 19th day of November 1897.