IMPROVEMENTS IN LAMPS FOR BURNING MINERAL OIL
Year: 1886

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of my invention for "IMPROVEMENTS IN LAMPS FOR BURNING MINERAL OIL" to be
as follows:-
:-
ย
This invention relates to lamps of the class described in the specification of
former Letters Patent granted to me and dated August 14, A.D 1884 No. 11285,
and comprises the improvement hereinafter described.
In order to obviate the inconveniences which result from overheating, in mineral
oil lamps, from using badly purified or very volatile oil, and in order to provide an
escape for the gases which are disengaged, a valve having a spring is arranged in
the plug of the oil reservoir. This arrangement prevents any explosion.
In the lamp described in the said former specification when the wick has burnt
nearly as low as the gripers it is necessary to unscrew the burner and to remove
the wick-tube in order to pull up the wick so that there is sufficient length of wick
above the said gripers. By the aid of the wick-tube constructed according to this
invention this operation can be effected without dismounting any part. The
improved wick-tube is provided at its upper part with an annular cavity in which
the gripers are located when the wick-tube is screwed up as high as possible. The
said gripers constitute springs in the annular cavity and open out and recede from
the wick; the wick is then free and can be drawn the desired distance above the
tube; as the wick-tube is caused to descend by a shaft and pinion the gripers
approach each other and engage again with the wick.
By the arrangement of this cavity at the upper part of the wick-tube, the wick
is not compressed at this point, and therefore absorbs the oil better than heretofore
and consequently chars less than heretofore.
In order to facilitate the removal of the charred particles of the wick which fall
into the tray surrounding the burner during the cleaning, and in order to facilitate
the fixing of the parts of the burner after cleaning the lamp, the chimney-carrying
gallery is connected with its tray, whereas the first mentioned tray is placed freely
upon a flange of the burner.

page_text: When the pieces have been removed and cleaned, the first tray is placed upon
the flange of the burner, and upon it is then placed the chimney-carrying gallery
with the other tray.
The cylindrical foot of the chimney gallery is made of such a diameter that it
fits exactly into the rim of the first tray even when the second tray is not screwed
upon the screw threads carrying it. The chimney-gallery with the second tray is
thus exactly guided prior to screwing, and it is only necessary to turn them from
right to left without any precaution whatever in order that the second tray
provided with internal screw-threads shall be screwed upon the threads carrying
the same.
When the foot of the galley is screwed at the bottom the tray is held by.
pressure.
With this invention it is impossible for the least practised hand to injure the
screw-threads of the lamp.
1
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: described and ascertained in and by the following statement:-
This invention relates to lamps of the class described in the specification of
former Letters Patent granted to me and dated August 14 A.D. 1884 No. 11285;
and it comprises the improvements hereinafter described.
In the accompanying drawing
Figure 1 is a vertical section of a lamp constructed according to the present
invention.
Figure 2 is a view of the upper part of the burner the chimney carrying gallery,
the cap and the tray hereinafter described being formed in a single piece.
Figure 3 is a section of the movable exterior tray.
Figures 4 and 5 are an elevation and plan of the tube or casing carrying the
wick griping jaws.
Figures 6 and 7 are a plan and a sectional side view respectively of the burner
with the wick-tube.
Figure 8 is an elevation of the wick-tube.
In order to obviate the inconveniences which result from overheating, in mineral
oil lamps, owing to the use of badly purified or very volatile oil, and in order to
provide an escape for the gases which are disengaged, a valve a having a spring b
is arranged in the plug of the oil-reservoir, figure 1. This arrangement prevents
any explosion.
In the lamp described in the said former specification, when the wick has burnt
nearly as low as the gripers, it is necessary to unscrew the burner and to remove
the wick-tube in order to pull up the wick so that there is sufficient length of wick
above the said gripers.
By the use of the wick-tube represented in Figures 1, 7 and 8, this operation
can be effected without dismounting any part. This improved wick-tube is
provided at its upper part with an annular cavity c into which the gripers e, which
are formed with, or attached to, springs e¹ secured to the wick casing d, are adapted
to enter when the wick-tube d is screwed up as high as possible so that the said
gripers open out and recede from the wick. The wick is then free and can be
drawn the desired distance above the tube. The wick-tube is operated by means
of a rack and pinion, and as it is caused to descend, the gripers approach each other
and again enter the wick, as represented in Figure 6.
By the arrangement of this cavity c at the upper part of the wick-tube the wick
is not compressed at this point, and therefore absorbs the oil better than heretofore
and consequently chars less.
In order to facilitate the removal of the charred particles of the wick which fall
during the cleaning, and in order to facilitate the fixing of the parts of the burner
after cleaning the lamp, the chimney-carrying gallery p is connected with a tray n

page_text: and with the cap 9 for directing the air for supporting combustion against the
flame. The tray m Figure 3 is placed freely upon the flange o Figures 1, 7 and 8
of the burner.
When the parts of the lamp have been removed and cleaned, the tray m is first
placed upon the flange o of the burner, and upon this tray m is then placed the
chimney-carrying-gallery p with the tray n and cap q.
The cylindrical foot 8 of the chimney gallery p is made of such diameter that it
fits exactly into the rim r of the tray m, even when the tray n is not screwed upon
the screw threads t carrying it as shown in Figures 1, 7 and 8. The chimney
gallery p with the tray n is thus exactly guided prior to screwing, and it is only
necessary to turn them from right to left, without any precaution whatever, in
order that the tray n shall be properly screwed upon the screw t. When the
tray n is screwed home the tray m is held by the pressure of the foot 8.
this arrangement it is impossible for the most inexperienced person to injure the
Bcrew threads. -
With
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign Correspondents I declare that what I claim in respect of my
Improvements in lamps for burning mineral oil" is :-
"
First.. The arrangement of a valve having a spring in the filling plug of the oil-
reservoir.
Second. The arrangement in the upper portion of the wick-tube, of the annular
cavity c for enabling the gripers secured to the wick-casing to recede from the wick
when the latter is to be raised, the said cavity also preventing the flow of oil to
the wick from being obstructed.
Third. The arrangement of the movable parts of the burner viz the trays m
and n the gallery and the cap q, in such a manner that the three latter, which are
joined together, are guided upon the screw threads carrying the same by the rim
of the movable tray m.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.