Improvements in or connected with Miners' Safety Lamps.
Year: 1897

page_text: Date of Application, 5th May, 1897
Complete Specification Left 5th Feb. 1898-Accepted. 5th Mar.. 1898
PROVISIONAL SPECIFICATION.
Improvements in or connected with Miners' Safety Lamps.
We, WILLIAM ACKROYD, of The Crescent, Ripon, Colliery Proprietor, and
WILLIAM BEST, of Morley, near Leeds, Engineer, both in the County of York,
do hereby declare the nature of this invention to be as follows:-
The object of this invention, is to construct miners' safety lamps in such a
manner that the air is supplied to the flame in an indirect line, double glasses are
securely fitted in position, and the lamp may be suitably used for inspecting the
roofs of mines.
According to our invention, we form a hollow circular box at the base of the
shield, and in the upper surface of the box we make perforations which are open
to the air. The inner surface of the circular box is also perforated, and the said
perforations come in front of a circular deflector which is situated on the gauze of
the lamp. The perforations in the outer portion of the circular box, are protected
by a circular deflector which is screwed onto the shield of the lamp, and the said
deflector prevents a current of air passing direct to the perforations.
Instead of employing a single following up ring for fastening the inner and
outer glasses in position, we employ a double ring which is composed of two parts,
one screwing within the other. The outer ring is employed for fastening the larger
glass in position, and when the latter is securely fastened, the inner glass can be
applied and the inner portion of the ring is screwed home, thus ensuring the firm
securing of both glasses.
The upper part of the shield is provided with a glass or other transparent sheet,
thus enabling the lamp to be suitably employed for the purpose of inspecting the
roofs in mines and other places.
Improvements in or connected with Miners' Safety Lamps.
We, WILLIAM ACKROYD, of The Crescent, Ripon, Colliery Proprietor, and
WILLIAM BEST, of Morley, near Leeds, Engineer, both in the County of York,
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:
1
The chicot of this invention is to construct miners' safety lamps in such a

page_text: manner that the air is supplied to the flame in an indirect line, double glasses are
securely fitted in position, and the lamp may be suitably used for inspecting the
roofs of mines.
In order that our invention may be clearly understood we will proceed to describe
same with reference to the accompanying drawing, in which the letters denote
the various parts.
According to our invention, we form a hollow annular box A at the base of the
shield B, and in the upper surface of the box A perforations C are formed. Dare
perforations in the inner surface of the box A, and E is a deflector which is situated
at the base of the gauze F opposite to the perforations D. The perforations C
are protected by an annular deflector G which is screwed onto the shield B, and
the said deflector G prevents a current of air passing direct to the perforations C.
It will be readily seen that the above described arrangement effectually prevents the
direct passage of air currents to the gauze of the lamp, thus removing the danger
of direct currents playing on the gauze.
Instead of employing a single following up ring for fastening the inner and outer
glasses Hand J in position, we employ a double ring which is composed of
two parts and L, one screwing within the other. The outer ring L is employed
for fastening the larger glass J in position, and when the latter is securely fastened.
the inner glass I can be applied and the inner portion K of the ring is screwed
home, thus ensuring the firm securing of both glasses H and J.
The upper part of the shield B is provided with a lens M or other transparent
disc, thus enabling the lamp to be suitably employed for the purpose of inspect-
ing the roofs in mines and other places.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is: -
1. In a miners safety lamp, a hollow annular box A having perforations C and D)
in same, in combination with deflectors E and G, substantially as and for the pur-
poses set forth.
2. In a miners safety lamp, the double ring composed of the two parts K and L,
substantially as and for the purposes set forth.
3. In a miners safety lamp, the transparent disc M situated at the upper part
of the shield, substantially as and for the purposes set forth.
Dated this 5th day of February AD 1898
BREWER & SON,
London and Leeds, Agents for the Applicants.