Improvements in Safety Lamps.
Year: 1891

page_text: Date of Application, 15th Apr., 1891-Accepted, 16th May, 1891
COMPLETE SPECIFICATION.
Improvements in Safety Lamps.
JOSEPH RAYNER M.A.. of 11 High Street New Sharlstone near Wakefield in
the County of York Certificated Under-manager of Coal Mines 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 :-
The object of my invention is to construct a safety lamp in such a manner that
should it at any time be found necessary in order to conform to rules to put out the
wick light or gas in a state of ignition in the lamp or to isolate the flame in the
lamp from the surrounding atmosphere the fact may be detected and recorded and
also to construct the lamp with a shut off appliance which when shut is locked and
requires a key or other appliance separate from the lamp to open it. My improve-
ments are applicable to safety lainps generally, such as those known as the
Stephenson Davy Clauny Muesler Rayner's and others and are ns herenfter
described.
The body of the lamp may be of the ordinary construction and the arrangement
of "gauze also of the ordinary type or types. I provide the lamp with a fast or
locked bonnet with a ventilator and sliding cover or shut off or ventilators and sliding
covers or shut offs with an automatic spring lock or locks which allow the shut off
or shut off's to be closed at the will of the user but can not be lawfully unlocked
only by a person authorised to do so with a special key or appliance separate from
the lamp, which I provide. When it is dangerous or contrary to rule to keep a light
in the lamp I extinguish by closing the ventilating holes with the detector or
recorder shut off.
Shut off's herein spoken of are shut off's at will or under the control of the user of
the lamp so far as closing them is meant.
And in order that my invention may be more completely understood reference is
given to the accompanying sheet of drawings and to the letters and marks thereon ;-
Figure represents an elevation and
I
Figure I represents a transverse section of the outlet ventilator, sliding shut off
and automatic spring detector or recorder lock as applied to the top of the bonnet.
Figure I represents the ventilator and shut off open C the slot in the sliding
shut off and D the pin in ventilator keeping shut off in position and regulating its
travel. B the spring bolt case and A the spring bolt.
Figure I represents the shut off drawn over the holes in the ventilator and the
spring bolt A sprung into the hole in the ventilator, which in this case must not be
open to the inside of the ventilator so that the bolt can be thrust back from the
inside, thus locking the shut off. Krepresents the spiral spring coiled round the
bolt A and acting against the collar of the bolt and the shoulder in the spring case.
The outer end of the locking bolt I provide with a screw thread I also provide a
key having a female screw thread by which the bolt may be withdrawn and the shut
off released.
A similar shut off arrangement I put over the inlet holes or strap the two
together and make the shut off complete to which I apply the above detector and
recorder lock arrangement.
Other parts of lamp not described are of ordinary construction.
Having now described the nature of the said invention and shewn by drawings
how the same may be carried into practice I would have it understood that I do
not limit myself to the precise limits details or configurations of the parts I have
expressed and shewn as the same may of course be varied or modified without in

page_text: any way departing from the nature and principle of my invention; but what 1
claim and desire to be secured to me by Letters Patent is
1. The employment of means for recording or detecting that it has been necessary
to put out the wick light or gas ignited in the lamp or to isolate the flame in the
lamp from the outer air and for recording that the means have been made use of,
substantially as and for purposes herein set forth.
2. The arrangement and employment of the means for locking and unlocking the
detector and recorder shut off or shut off's substantially as and for purposes herein
set forth.
3. The employment of a key or other appliance separate from the lamp to release
or empower the release of the shut off or shut offs at will" when shut off and
caught by an automatic spring bolt or catch or otherwise held, substantially as and
for purposes herein set forth.
73
JOSEPH RAYNER, M.A.