Improvements in Electric Lamps for Miners' Use.
Year: 1897

page_text: Date of Application, 5th Aug., 1897-Accepted, 11th Sept., 1897
[Communicated from abroad by OTTO SIEDENTOPF, of 131 Leipzigerstrasse, Berlin, W.,
in the Empire of Germany, Engineer.]
Improvements in Electric Lamps for Miners' Use.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents, of
45 Southampton Buildings, in the County of Middlesex, 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 relates to an electric miner's lamp which differs from such lamps as
hitherto constructed by the novel arrangement of the polar or terminal openings and
of the protecting dome covering the lamp bulb.
This invention is illustrated in the accompanying drawing, in which;
Figure 1 shews a front elevation of the miner's lamp.
Figure 2 is a side elevation of the same, partly in section, and
Figure 3 is a side elevation of the lamp shewing the cover or lid open.
As shewn in the drawing, a protecting dome a having an opening covered with
glass or the like is, in the known manner, hinged upon the casing of the lamp in
such a manner as to cover the small incandescent lamp 6 which is fed from a small
secondary battery, such dome overlapping the upper edge of the lamp casing by
means of a flange c bent at an angle of 90° in such a manner thar the dome a
together with the lid d of the lamp may be secured in its closed position by tightening
a screw e which passes through the lid and is provided with a rectangular head or
the like.
Owing to the arrangement of the protecting dome a which can swing downwards
when opened, the lamp 6 can be readily and quickly replaced in case of need.
The arrangement above described presents the further advantage that the
protecting dome a covers the terminal openings f which serves for charging
the secondary battery within the lamp as they are arranged, not as hitherto upon the
side, but upon the front of the lamp, and thus when the lamp is closed these openings
are not accessible. In this manner the contact pieces are prevented from becoming
dirty, which might interfere with the charging of the secondary battery, and any
improper use of the current is avoided.
As regards this invention the further dispositions of the lamp are of secondary
importance, and may be varied according to circumstances.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is:-
=
1. An electric miner's lamp characterized by the arrangement of the
terminal openings (f) upon the front of the lamp and by the protecting dome (a)
covering these openings when closed.
2. An electric miner's lamp characterized by the arrangement of the
terminal openings (f) upon the front of the lamp and by the protecting dome (a)

page_text: covering these openings when closed, such dome being hinged to the lamp casing
and overlapping the upper edge of the latter in such a manner that it may, together
with the lid (d) of the lamp, be secured in its closed position by means of a
screw (e) or the like.
Dated this 5th day of August 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.