Improvements in and relating to Miners' Safety Lamps.
Year: 1892

page_text: Date of Application, 6th Oct., 1892-Accepted, 12th Nov., 1892
COMPLETE SPECIFICATION.
Improvements in and relating to Miners' Safety Lamps.
I, HEINRICH HÜBNER of Hermsdorf in the Kingdom of Prussia and German
Empire, Tin Plate Manufacturer, 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 that class of miners' safety lamps in which the ignition
is accomplished by the explosion of a percussion cap, or the like.
In the accompanying drawings to which reference is hereinafter made,
Figure 1 represents a lamp constructed to embody my improvements, partly in
elevation and partly in vertical section.
Figure 2 shews in plan and elevation a cap or hood to which the hammer of the
percussion device is secured.
Figure 3 illustrates in plan and elevation a toothed wheel by means of which
rotary motion is imparted to the ratchet toothed ring shewn in plan and elevation
by Figure 4, thus operating the percussion hammer.
Figure 5 shews in plan the disc or pad containing the percussion caps.
The benzine vessel A is preferably pressed from a sheet of the best charcoal
iron. At its lower edge it is surrounded by a brass ring S lapped or soldered on
and its upper end is closed by a plate a which may be secured by brazing or
soldering. This top plate a has formed on its upper surface two annular projections
to the outer one of which a', is secured the foundation ring T of the lamp frame F,
while the inner one, a³, is screwed to receive the lamp burner M by means of which
the vessel A is closed. The toothed wheel o² shewn in Figure 3 is placed around
the annular projection a² and gears with the pinion gl being held in place by a
flango m² of the burner M. The pinion g' is secured to the upper end of a rod or
spindle G which passes through the benzine vessel and is furnished on its lower end
with a knob or handle W. The ring L furnished with the ratchet teeth / is placed
upon the wheel g³ and is held so as to rotate therewith by a projection n on the
wheel engaging with a slot n' in the ring. The percussion pad or disc is placed
upon the upper face of the ring and then the cap or hood O carrying the spring
hammer P is placed over all and held firmly in place by the glass chimney B.
The lamp wick is contained within a tube J secured to which is an arm or
projection K drilled and tapped for the reception of a screw H. All these parts
are contained within a perforated or gauze cylinder U. The screw H passes
through the bottom of the vessel and terminates in a disc V. The wick can thus
be easily raised or lowered by rotating the screw which is preferably formed with a
left hand thread.
The percussion device is operated by turning the disc or handle W thus rotating
the pinion, wheel'g', and the ring L. The teeth of the latter then raise and
release the hanımer P which falls upon one of the caps contained in the disc or
pad, and, causing an explosion and flame, ignites the wick.
In order to ensure a tight joint the rim of the cap O is returned as shewn at Q
Figure 1. The gauze hood C is furnished with a cap C¹ fitting over the top of
the chimney B and is held down by the ring E of the frame. Upon the foundation
ring T of the frame being screwed on the annular projection a' all these parts are
held firmly together. To finally secure the frame of the lamp to the benzine
vessel one of the rods of the frame F passes through the top plate D and carries
an arm or handle y by means of which it can be rotated. Its lower end is furnished
with preferably six threads of very quick pitch so that one half turn is sufficient
to cause the end of the rod to enter into a hole or recess in the top plate of the
benzine vessel and then firmly lock the component parts of the lamp together.

page_text: Ris a ring or hook by means of which the lamp can be easily carried or suspended.
All the iron parts of the lamp are thoroughly galvanised so as to resist corrosion
and be easily cleaned.
"
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,
1. A miner's safety lamp, constructed and arranged substantially as herein before
described and as illustrated by the accompanying drawings.
2. The combination in a miner's safety lamp of the frame secured upon the lamp,
a gauze hood C, a glass cylinder B, and a steel ring Q, constructed and arranged
substantially as and for the purpose herein before described and as illustrated by
the accompanying drawings.
3. In a miner's safety lamp, the combination with the benzine vessel A, of the
burner M, the percussion pad a, the annular toothed wheel g, a knob for rotating
the wheel, a spring hammer P, and a ratchet wheel I, constructed arranged and
operated substantially as herein before described and as illustrated by the
accompanying drawings.
Dated this 4th day of October A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.