Improvements in Railway Hand Signal Lamps, applicable also to Railway Carriage Side and Tail Lamps, and Locomotive, Ship, and other such like Lamps.
Year: 1893

page_text: Date of Application, 21st Aug., 1893-Accepted, 7th Oct., 1893
COMPLETE SPECIFICATION.
Improvements in Railway Hand Signal Lamps, applicable also to
Railway Carriage Side and Tail Lamps, and Locomotive, Ship,
and other such like Lamps.
I WALTER HENRY BULPITT of the Firm of H. Bulpitt & Sons of 155 Camden
Street Birmingham in the County of Warwick Tin Plate Workers do hereby
declare the nature of my said invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
My invention has for its object, improvements in railway hand signal lamps
applicable also to railway carriage side and tail lamps and locomotive ship and
other such like lamps. These improvements simplify the construction as compared
with my former Patent No. 29428 and enable me to produce the lamp at a cheaper
rate without sacrificing its effectiveness in any respect.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a double sized sheet of drawings upon
which I have shown my improvements applied to a railway hand signal lamp.
This will however be a sufficient example of the principle of my invention to
enable any person conversant with the craft to apply my invention to other such
like lamps.
Figure 1 is a part vertical and longitudinal section and part elevation of a hand
railway signal lamp.
Figure 2 is an elevation looking at the back of the lamp.
Figure 3 is a horizontal section on line 1-2.
The desideratum in lamps used for the combustion of light volatile oils such as
paraffin and other similar oils is to supply ample ventilation in such a manner that
the air cannot strike with any considerable force upon the flame as the flame when
burning such light oils is very sensitive. In connection with my new mode of
ventilation in the present construction I use a burner K constructed according to
a former Patent of mine viz. No. 29428. This burner K is fixed directly upon the
oil reservoir a' which has no outer casing whatever the air being free to play
directly upon it from all sides and it is sufficiently large to contain oil to last
several nights. A is the ordinary lamp body or casing. E is the internal slide
well known in such lamps and F is the usual reflector. In regard to none of these
do I claim any novelty but they are shown for the sake of more clearly illustrating
the lamp as a whole. The important part of my invention is the jacket B which
surrounds the back and sides of the lamp being united to the body A at 6 so as to
be sealed against the entrance of air at the bottom. The sides of the jacket are
also united to the body part at thus forming an air jacket and space S for the
free circulation of air from the top which is quite open and also from holes ¹ of
which there may be any convenient number. The air is allowed to pass into the
inner portion of the lamp through the holes a² in the bedy A. these holes a not
being placed opposite the holes but by preference as shown in Figure 1 above
and below them though I do not confine myself to the exact position or number of
such holes either in the casing B or body A the object being to allow the burner
to gently draw in or breathe the amount of air required without setting up any
large or direct current. Lamps so constructed burn these light oils very steadily
with a wick say three eights of an inch broad and will bear all the agitation
required in such lamps for shunting and signalling purposes.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed what I claim is
1st. The improvements in railway hand signal lamps applicable also to railway
carriage side and tail lamps and locomotive, ship and other such like lamps,
substantially as herein set forth and as shown upon the drawings.
2nd. In such lamps as enumerated in Claim 1 the jacket B forming air space S
as and for the purpose herein set forth.
Dated this 19th day August 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.