Improved Method of Locking and: Unlocking Miners' Safety: Lamps.
Year: 1895

page_text: Date of Application, 19th Feb., 1895
Complete Specification Left, 8th Nov., 1895-Accepted, 1st Feb., 1896
PROVISIONAL-SPECIFICATION.
Improved Method of Locking and: Unlocking Miners' Safety: Lamps..
THOMAS TRUSSELL 44 Bridlington Street: Hyson Green, Nottingham.Mining
Surveyor.do hereby declare the nature of this invention to be as follows:-
This invention, relates to an improved method, of locking and unlocking miners
safety lamps, and consists in locking the lamp, by means of a peg or rivet of wood,
or other, suitable, material, of a novel shape, color or design, and in the manner
hereinafter described. & illustrated by drawings.
Figure 1. shews a lamp locked ready for use.
A, is the bottom part-or-oil vessel.
B, is the top part, consisting of-guaze and glass.
D is a bar, capable of moving, up and down as required.
The top. and botton part of the lamp, are held together, in the usual manner, by
screwing or otherwise.
Figure 2, shews the bottom part of the.lamp, separated from the top part, in this
part is made a recess or hole E.
Figure 3, is a plan of Figure 2, and shews the hole or recess E.
Figure 4. is a view of a portion of the top part of the lamp, shewing the hole or
recess F. running through it.
Figure 5. is a plan of Figure 4, and shews the hole: F.
Figure 6. may illustrate, the peg before mentioned, for locking the lamp &
lettered C.
When the top part A. and the bottom part B of the lamp are screwed together
it is arranged, that the holes or recesses E & F are in a line with each other,
as shewn in Figure 1.
When in this position, the peg C is inserted in the holes E & F. and secured
there, by the moveable bar D. When this is done, the bottom part of the lamp
cannot be unscrewed from the top part, unless the peg C is broken, and when this
is done the opening of the lamp is made apparent, and this is a violation of the
Mines Act. In practice the peg is made strong enough to prevent it, being
opened, except by a special tool, in charge of the officials.
Dated this Eighteenth day of February 1895,
COMPLETE SPECIFICATION.
Improved Method of Locking and Unlocking Miners' Safety Lamps.
THOMAS TRUSSELL No. 4+ Bridlington Street, Hyson Green Nottingham,
Mining Surveyor 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 the locking (fastening) & unlocking of miners safety
lamps more particularly, to that class of locks or fastenings, in which the unlocking
or unfastening of the lamp, is made apparent or detected.

page_text: In my method of locking or fastening I make use of a wood peg or other suitable
breakable material, of a suitable shape color or design, in such a manner, that
the lamp, cannot be opened, without breaking the aforesaid peg and the opening of
the lamp detected.
The drawing attached Fig: 1. shews a'lamp locked, ready for use.
A is the top part of the lamp.
P
B is the bottom part of the lamp, these are screwed together, in the usual
manner and when this is done, the two holes E & Fin the bottom and top parts
of the lamp Fig. 2 & Fig. 3, are in line with each other, that is the hole F is
immediately over the hole E, as seen in. Fig. 1. the wood plug C is placed in
the hole F and pushed downwards, until the bottom of it, rests on the bottom of
the hole, in the bottom part of the lamp Fig. 1.
Attached to the top part A of the lamp, is a small spring D Fig. 1. this
spring D allows the wood plug. C to pass through the hole F into the bottom
of the hole E, & holds it there, in position; as seen in Fig. 1.
Fig. 4. shews the screw arrangement for opening the lamp, and is a casting
having a hole in the centre, made to fit the bottom of the lamp, a screw-is
fitted to this casting as shewn.
} . :
-
The lamp to be opened, is placed on this casting, the casting holds the bottom
of the lamp, firmly by the lug. H, and does not allow it to move; the screw is
turned, until the end of the screw comes in contact with the lug I: on the top
part A of the lamp, and by turning the screw far enough, the top: part of-the
lamp is turned round & the wood plug C broken & the lamp-opened:
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 use of the wood peg or plug or other breakable material of suitable shape
-color or design in the manner substantially described and illustrated.
Dated this Seventh day of November 1895.