Improvements in Lamps for Burning Mineral or other suitable Oils.
Year: 1890

page_text: Date of Application, 21st July, 1890
Complete Specification Left, 20th Apr., 1891-Accepted, 23rd May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Lamps for Burning Mineral or other suitable Oils.
I, ANDREW HOWAT, of 6 Bellwood Terrace, Old Trafford Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to improvements in lamps for burning mineral or other
suitable oils and the chief object of my improvements is to produce at a low cost a
lamp which will give a very brilliant and pure light with a low class of oil such as
petroleum or paraffin.
In constructing according to my improvements a hand or table lamp for domestic
purposes I employ a suitable oil reservoir for the mineral oil or other illuminant
The burner tube is
provided preferably with a central draught wick holder.
threaded on the outside and upon this is screwed the threaded boss of a circular
disc or plate provided with say two spring clips or sliding bolts which engage an
annular groove or recesses in the upper portion or body of the lamp by turning
which the screwed boss can be adjusted on the burner tube to regulate the height
of the flame. The upper portion or top of the lamp consists of a metal cap or bell
with a central hole coinciding with the position of the burner to permit the passage
of the flame. A chimney made wholly or partially of glass is cemented or secured
upon the upper side of the cap or bell concentrically with the central hole therein
and the top of the cap or bell is preferably a separate piece screwed or fitted to the
main portion in order that it may be removed whenever it is required to clean the
chimney.
In addition to the air supply to the flame through the centre of the wick holder
there is a second supply admitted through a series of perforations around the body
of the lamp below the glass; and the inside of the cap or bell or a separate
part secured thereto is suitably curved or formed so as to divert or deflect the
air entering through these perforations and prevent it impinging directly on
the flame.
After the lamp has been lighted and the body or upper portion attached to the
reservoir or lower portion by means of the spring clips or bolts before described
the only mode of detaching the body is by unscrewing it with the intermediate
plate or flame regulator which ensures the extinguishing of the lamp.
Deted this 10th day of July 1890.
H. B. BARLOW,
Agent for Applicant.
No text detected.

page_text: In constructing according to my improvements a hand or table lamp for domestic
purposes I employ a suitable oil reservoir for the mineral oil or other illuminant
provided with a central draught wick holder and with another air inlet as hereinafter
specified. The burner tube is threaded on the outside and upon this is screwed the
threaded boss of a circular disc or plate provided with say two spring clips or sliding
bolts which engage an annular groove or recesses in the upper portion or body of
the lamp by turning which the screwed boss can be adjusted on the burner tube to
regulate the height of the flame. The upper portion or top of the lamp consists of
a metal cap or bell with a central hole coinciding with the position of the burner to
permit the passage of the flame. A chimney made wholly or partially of glass
is cemented or secured upon the upper side of the cap or bell concentrically with
the central hole therein and the top of the cap or bell is preferably a separate piece
screwed or fitted to the main portion in order that it may be removed whenever it
is required to clean the chimney.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying two sheets of drawings reference being had
to the figures and letters marked thereon.
Figure 1 is an elevation of a hand or table lamp for domestic purposes con-
structed according to my improvements. Fig. 2 is a detail view of part of the
same. Fig. 3 is a sectional elevation of the lamp. Fig. 4 is a sectional elevation of
the burner or wick holder and part of the oil reservoir and Fig. 5 is a plan on the
plane of the line A. B, Fig. 1.
Fig. 6 is a sectional elevation of a modified or alternative construction of my
improved lamp, Fig. 7 is a plan on the plane of the line C D, Fig. 6, and Fig. 8 is
an elevation of the top part of the lamp.
Similar letters refer to similar parts throughout the several views.
Referring first to Figs. 1 to 5.-In these views a is the body forming an oil
reservoir for the mineral oil or other illuminant, a' is an annular flange thereon,
> is the handle secured to the body a, c is a hinged cap covering an aperture through
which the oil can be poured to fill or replenish the reservoir a, d is the burner
which is threaded on the outside to receive the screwed boss' of the flame
regulating plate f g is the circular wick which is slipped into its place over the
central draught wick holder hand inside the burner d; ii are the two clips or
sliding bolts which are fitted upon the plate f and are held normally in the position
shown in Figs. 3 and 5 by the plate spring to engage an annular groove or
recess in the upper portion of the body of the lamp. The top of the lamp is
formed by the metal cap or bell which is provided with two projections
which it is screwed into a threaded portion of the part k. The cap has a central
hole coinciding with the position of the burner d and the glass chimney m is
secured upon the upper side of the cap 1 concentrically with the central hole therein,
the chimney in this instance being shown flanged at the base and confined between
the cap and a fixed or screwed ring n.
by
In addition to the air supply to the flame through the centre of the wick holder /
there is a second supply admitted through a series of perforations around the
portion of the body of the lamp and below the glass m; the cap is suitably
curved and formed as shown to guide the air entering at k to the flame and the
underside of the cap 1 (or it may be a separate part secured thereto) may be further
curved or formed so as to divert or deflect the air entering through these per-
forations and prevent it impinging directly on the flame.
Before lighting the lamp the plate by means of its boss f¹ is screwed on to
the burner d, the wick y is then lighted and the upper portion of the lamp with the
chimney m attached to the reservoir or lower portion a by pressing down the
part inside the annular flange a' until the spring clips
engage the annular
groove whereby the upper and lower portions of the lamp body are united.
The height of the flame can be regulated by adjusting the position of the
boss on the burner d and this is effected by turning round the part k and bringing

page_text: the clips against stops o in the annular groove k¹ and so by continued turning
screwing the boss f¹ either up or down as required.
After the lamp has been lighted and the upper portion of the body attached to
the lower portion by means of the spring clips or bolts i as above described, the
only mode of detaching the body is by unscrewing it with the intermediate plate
or flame regulator f which action ensures the extinguishing of the lamp provided
that the length of the boss f' be properly proportioned to the diameter of the
wick holder.
On looking at Fig. 4 it will be seen that the wick 9 is in two pieces as indicated
by the upper portion being shaded differently from the lower and longer part. My
object in this is to dispense with the ordinary pinion or rack and pinion motion
whereby the wick is raised and the charred portion cut off to trim the lamp. Instead
I propose to permanently retain the lower and longer portion of the wick in the
position shown in Fig. 4 and whenever required to removed the charred short piece
and replace it by a new piece of the same length.
I propose to pack the reservoir a with fragments of sponge s or other suit-
able material in order to absorb the oil or other illuminant and as much as
possible to prevent any possibility of accident in the event of the lamp being
upset.
Referring now to Figs. 6, 7 and 8, the chief points of difference between the lamp
illustrated by Figs. 1 to 5 and the modified or alternative construction illustrated
by these views are that the intermediate plate or flame regulator f is in this case
soldered or otherwise fixed to the part k and the cap or bell is also secured
thereto so that the upper and lower portions of the lamp body are simply con-
nected and disconnected by means of the screwed boss f' fitted on the threaded
burner d. The chimney m is shown fastened in its place by a screw p so that in
this case it is only necessary to remove the chimney m in order to light the
lamp. Instead of the screw p a spring clip or other well known means may be
employed to hold the chimney firmly in position and yet allow it to be removed
when required.
Another small point of difference is that the metal cap c is screwed on to the
oil reservoir instead of being hinged as in the preceding arrangement.
I wish it to be clearly understood that certain variations or modifications in both
forms of my improved lamp illustrated by the drawings may be made without
departing from the nature of my invention as described and as hereinafter pointed
out and defined by the claims. For example the form and shape of the lamp may
be changed, the handle may be dispensed with and the reservoir may be supported
in a suitable stand or holder.
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 :-
In a hand or table lamp-
1. The combination of a reservoir for the illuminant, a central draught holder
and burner for the wick, a flame regulator screwed on said burner, means for
connecting the upper to the lower portion of the lamp, a second air supply
admitted to the flame through perforations around the body below the glass or
chimney, a cap or bell with a central opening concentric with the burner and the
chimney and means such as the cap or bell for guiding the air entering through the
said perforations to the flame all substantially as and for the purposes herein
described and as illustrated by the drawings annexed.
2. The combination with a central draught wick holder, of a flame regulator con-
sisting of a plate or disc with a screwed boss fitting upon the outside of the
threaded burner tube and serving to connect the upper to the lower portion of the
lamp body substantially as herein set forth.
3. The combined arrangement and construction of the parts constituting the
improved lamp as described and substantially as shown in Figs. 1 to 5,

page_text: 4. The combined arrangement and construction of the parts constituting the
modified or alternative form of the improved lamp as described with reference to
Figs. 6, 7 and 8.
Dated this 18th day of Anril 1891
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.