Improvements in Industrial Lamps.
Year: 1891

page_text: Date of Application, 7th May, 1891
Complete Specification Left, 8th Feb., 1892-Accepted, 12th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Industrial Lamps.
We, LEONARD RANDALL DAVIES, of 22 Walpole Street, New Cross, in the
County of London, Electrical Engineer, and MAURICE SHEARER, of 24 Sylvan
Grove, Old Kent Road, in the same County, Engineer, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to improvements in that class of lamps, commonly known
as "Industrial " lamps, wherein oil, contained in a suitable reservoir, is forced into
chambers or a head by air pressure, and the said chambers being heated, vaporise
the oil, which issues in the form of gas through a nozzle and burns with a large and
powerful flame, the heat of the flame being utilised to keep the said chambers at the
necessary vaporising temperature. The air pressure in the reservoir is ordinarily
supplied by means of a hand pump.
The object of our invention is to effect improvements in the nozzles or burners
and also in the pumps.
In the burners usually employed the gas issues through a fine hole, and con-
siderable difficulty has heretofore been found in keeping the said hole clear, as it is
liable to be choked, or partially choked by small particles of dirt, or other matter
contained in the heavy oil used in these lamps, or particles of carbonised matter
formed during the process of vaporisation and carried into the hole by the stream
of gas. Such choking either extinguishes, or greatly reduces the flame, and when
it occurs a fine wire, or "pricker" has to be pushed into the hole to clear the
obstruction.
This however affords only temporary relief, as the obstructing particle is soon
blown again into the hole.
Our improved burner consists of a nozzle, arranged to screw into a suitable
socket, the greater part of the nozzle is bored to a large size, and in the centre ot
the underside of the top is a downwardly projecting conical piece, through the
centre of which a fine hole is drilled forming the actual burner. This conical piece
terminates with a sharp edge around the hole, and we find in practice that the
effect of this particular construction is that particles of matter carried forward by
the gas are deflected by the said conical projection into the annular space around
it, and thus the burner hole is kept clear.
We sometimes form two, three, or more grooves, or notches in the sharp edge of
the conical piece, so that if by chance a large particle should lodge against the end,
the said notches will still afford free admission for the gas to the hole.
Our improvement in the pumps is mainly intended for use with that class of
industrial lamp which is small and light enough to be lifted and carried about by
one hand.
By our said improvement we are able to lift and carry the lamp by the pump
handle, and thus dispense with the special handle on the top of the oil reservoir
heretofore provided for this purpose. We fix the pump in the centre of the
reservoir, and just underneath the handle, on the piston rod we provide a clutch,
which, in a certain position of the handle, engages with a flange on the top of the
pump barrel and locks the handle, enabling the lamp to be securely lifted and
carried thereby. By partially rotating the handle, the clutch is disengaged and
the pump can then be worked in the ordinary way.
Dated this 7th day of May 1891.
AMBROSE MYALL,
21, Cockspur Street, London, S. W., Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Industrial Lamps.
We, LEONARD RANDALL DAVIES, of 22, Walpole Street, New Cross, in the
County of London, Electrical Engineer, and MAURICE SHEARER, of 24 Sylvan
Grove, Old Kent Road, in the same County, 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 :-
Our invention relates to improvements in that class of lamps, commonly known
as "Industrial Lamps," wherein oil, contained in a suitable reservoir, is forced into
chambers, or a head, by air pressure, and the said chambers being heated, vaporise
the oil, which issues in the form of gas through a nozzle and burns with a large and
powerful flame, the heat of the flame being utilized to keep the said chambers at the
necessary vaporising temperature. The air pressure in the reservoir is ordinarily
supplied by means of a hand pump.
The object of our invention is to effect improvements in the nozzles or burners,
and also in the pumps.
In the accompanying sheet of drawings;
Fig. 1 is a sectional elevation of a nozzle or burner, constructed in accordance
with our invention.
Fig. 2 is a plan of the same, viewed from above, and Fig. 3 is a plan viewed
from below.
Fig. 4 is a sectional elevation of a pump, shewing our improvements applied
thereto.
Fig. 5 is a plan of same through the line A A in Fig. 4.
In the burners usually employed, the gas issues through a fine hole, and
considerable difficulty has heretofore been found in keeping the said hole clear, as it
is liable to be choked, or partially choked, by small particles of dirt, or other matter
contained in the heavy oil used in these lamps, or by particles of carbonised matter
formed during the process of vaporisation and carried into the hole by the stream
of gas. Such choking, either extinguishes, or greatly reduces the flame, and when
it occurs, a fine wire or "pricker," has to be pushed into the hole to clear the
obstruction. This however affords only temporary relief, as the obstructing particle,
or a fresh one, is soon blown again into the hole.
Our improved burner, as shewn in Figs. 1 2 and 3, consists of a nozzle B,
arranged to screw into a suitable socket (not shewn in the drawing). The greater
part of the nozzle is bored to a large size, as shewn at C, and in the centre of the
underside of the top is a downwardly projecting conical piece D, through the
centre of which a fine hole E is drilled, forming the actual burner. This conical
piece terminates with a sharp edge around the hole, as shewn, and we find in
practice, that the effect of this particular construction is, that particles of matter
carried forward by the stream of gas are deflected by the said conical projection
into the annular space F around it, and thus the burner hole is kept clear.
We sometimes form two, three, or more grooves or notches H, in the sharp edge
of the conical piece D, so that if, by chance, a large particle should lodge against
the end, the said notches will still afford free admission for the gas to the hole.
Our improvement in the pumps is mainly intended for use with that class of
industrial lamp which is small and light enough to be lifted and carried about by
one hand.
By means of our said improvement, we are able to lift and carry the lamp by the
pump handle, and thus dispense with the special handle on the top of the oil reservoir
heretofore provided for this purpose. Referring to Figs. 4 and 5, we fix the pump
barrel J in or near the centre of the top K of the oil reservoir, and just underneath
the pump handle L, we fix on the piston rod, a clutch consisting of a piece M with
projections M M¹. On the barrel cover N we provide an inwardly projecting

page_text: flange P, having gaps P¹ P¹ formed in it, slightly larger than the pro-
jections M¹ M'.
Now if the handle be pushed down till these projections enter the said gaps, and
then turned one quarter round, the projections will come under the projecting parts
of the flange P, and the handle will be locked, enabling the lamp to be securely
lifted and carried thereby. By partially rotating the handle the clutch is
disengaged and the pump can then be worked in the ordinary way. If preferred
the inwardly projecting flange pieces may be fixed on the piston rod, and the clutch
upon the barrel cover. Any suitable kind of stop, catch, or fastening may be
provided to prevent the handle turning when in the locked position for lifting the
apparatus.
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 lamps of the class described, a burner, consisting of a nozzle B, having a
fine hole E, a downwardly projecting conical piece D, with a sharp edge, and an
annular space F around the said conical piece, for the purpose set forth.
2. In lamps of the class described, a burner consisting of a nozzle B, having a
fine hole E, a downwardly projecting conical piece Ď, with a sharp edge and
notches H formed in the edge, and an annular space F, around the said conical
piece, for the purpose set forth.
3. In lamps of the class described, a pump, having a clutch M, with
projections M M¹, and an inwardly projecting flange P, with gaps P P¹, for the
purpose set forth.
4. In lamps of the class described, a pump, having a clutch M, with pro-
jections MM, and an inwardly projecting flange P, with gaps P¹ P¹, in
combination with a suitable stop, catch, or fastening, for the purpose set forth.
Dated this 8th day of February 1892.
AMBROSE MYALL,
21, Cockspur Street, London, S. W., Agent for the Applicants.