Improvements in Certain Miners' and similar Safety Lamps.
Year: 1890

page_text: Date of Application, 18th Apr., 1890
Complete Specification Left, 19th Jan., 1891-Accepted, 21st Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Certain Miners' and similar Safety Lamps.
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 the construction of the spirit reservoirs
or receptacles of those miners' and other similar safety lamps in which the illuminant
employed is spirit or volatile oils.
Hitherto it has been customary in safety lamps of this class to form the reservoir
with a bottom which is soldered into position after the reservoir has been packed
with the sponge commonly employed to feed the wick with spirit. One of the chief
defects of this method of making up the reservoir is that after the lamp has been in
use some time the solder gets disturbed and the joint becomes defective with the
result that leakage takes place.
My improvements consist essentially in casting the bottom with the reservoir in
one and the same casting so that as there is no joint at the bottom there can be no
possibility of leakage from the cause above named. I leave a small circular aperture
on the top side of the hollow casting or reservoir through which the sponge is
packed and the wick inserted. This circular aperture is then made up by the wick
holder which is screwed soldered or otherwise secured in position.
Suitable means are provided for filling and replenishing the reservoir with spirit.
Dated this 17th day of April 1890.
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Certain Miners' and similar Safety Lamps.
I, ANDREW HOWAT, of 6, Bellwood Terrace, Old Trafford, Manchester, in the
County of Lancaster, 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:-
My invention relates to improvements in the construction of the spirit reservoirs
or receptacles of those miners and other similar safety lamps in which the illuminant
employed is spirit or volatile oils.
Hitherto it has been customary in safety lamps of this class to form the reservoir
with a bottom which is soldered into position after the reservoir has been
packed with the sponge commonly employed to feed the wick with spirit. One of
the chief defects of this method of making up the reservoir is that after the lamp
has been in use some time the solder gets disturbed and the joint becomes defective
with the result that leakage takes place.
My improvements consist essentially in casting the bottom with the reservoir in
one and the same casting so that as there is no joint at the bottom there can be no
possibility of leakage from the cause above named. I leave a small circular
aperture on the top side of the hollow casting or reservoir through which the core
or mould of sand can be removed and through which the sponge is packed and the
wick inserted. This circular aperture is then made up by the wick holder which
is screwed soldered or otherwise secured in position.
Suitable means are provided such as a small hole by the side of the central
aperture for filling and replenishing the reservoir with spirit or volatile oil.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The manufacture of the spirit reservoir or receptacle of a safety lamp by casting
the same in one piece of metal with a central aperture only on the upper side for
the reception of the wick holder as and for the purposes herein described.
Dated this 17th day of January 1891.
H. B. BARLOW,.
17, St. Ann's Square, Manchester, Agent for Applicant.