Year: 1888

page_text: 1, WALTER HENRY BULPITT, trading as Bulpitt and Sons of Camden Street
Birmingham in the County of Warwick Lamp Manufacturer and Tin Plate Worker
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 and other
lamps which enable the user to change the colour of the light with the hand which is
holding the lamp which is of great importance as hitherto it has been necessary to
raise the lamp in one hand while the cylinder was being turned with the other.
Again my improvements facilitate the cleaning of the glass as the cylinder
containing the glass can be readily removed from the body of the lamp.
In order that my invention may be clearly understood and more easily carried into
practice I have appended hereunto a large sheet of drawings upon which I have
illustrated one of my improved hand lamps complete together with one or two slight
modifications of the details.
Figure 1 is an elevation of a hand lamp having my improvements.
Figure 2 is a vertical sectional elevation through the centre of same.
Figure 3 is a horizontal section near the bottom shewing the small wheels a¹ a² a³
& a upon which the cylinder B revolves.
Figure 4 is a similar section near the top for shewing the cross bar b¹ for revolving
the cylinder B.
Figure 5 is a broken off vertical section through a hand lamp showing a modified
way of supporting and revolving the cylinder B.
Figure 6 is a horizontal section through the bottom part of same shewing the
pivot upon which the cylinder revolves and the stops for preventing it revolving
too far.
Figure 7 is a horizontal section at the top of the lamp shewing a modification of
the method of revolving the cylinder.
Figure 8 is a horizontal section through the centre of the lamp and cylinder
shewing the red glass X green glass Y and space Z.
The lamp A is provided with the hinged top A² through which in a piece of tube
the spindle c is mounted and revolves having at its top end outside the lamp the bent

page_text: handle C and at its lower end the square key c³ which when the lid of the lamp is
closed enters the hole 63 in the bar b¹ on the top of the cylinder B. By these means a
turn of the handle C by the fingers of the hand holding the lamp in the direction
shewn by dotted lines Figure 2 will readily revolve the cylinder one way or the other
and change the colour the small metal projection d' and a similar projection on the
other side of lamp being provided to form a stop to the projection D upon the
handle C for preventing the cylinder from being turned further than necessary.
The cylinder B is supported by the small revolving wheels a¹ a² a³ and a which are
mounted in the bottom of the lamp and are so arranged as to be covered from the
outside by the four feet upon which the lamp stands. The cylinder is provided with
the circular pathway 63 which covers and runs upon these small wheels.
In place of having the cylinder revolving upon the small wheels a' a³ a³ and a*
I may provide a cross bar fl and mount it upon the pivot E Figure 5 at the bottom
with the cross bar b' at the top provided with the socket 6 having a slot 66 in its side
in which an arm c³ slips when the lid is closed as shewn the arm is formed upon the
spindle working in a long socket a³ which is fixed to the lid A³ the spindle c¹ being
bent at the upper end to form the handle C as before.
To prevent the cylinder turning further than necessary in this case a small
projection f is formed upon the bottom crossbar f¹ and corresponding projections ƒ³
and Figure 6 are formed on the bottom of the lamp.
Another method of revolving the cylinder is shewn by Figure 7 where the bottom
of the spindle c which is mounted as before is bent round to form a lever c which
works between two small pins 67 and 68 formed upon the cross-bar 66 of the
cylinder B.
The lid A of the lamp is hinged at a and is fastened with the catch a'.
It will be evident that the cylinder B may be pivoted upon ball bearings set either
at the top or bottom so as to reduce the friction and instead of the square hole 63
there may be two holes in the bar some distance from each other and two projections
on the bottom of the spindle c¹ to enter the same.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is:
--
1. The improvements in railway hand signal and other lamps by which the inner
slide is operated by the hand which carries the lamp substantially as herein set forth
and shown upon the drawings.
2. In improvements in railway hand signal and other lamps the combination of the
handle C or its equivalent with the revolving cylinder B together with the mode of
supporting the cylinder and arrangement for stopping same substantially as and for
the purpose herein set forth and illustrated upon the drawings.
Dated the 17th
CL1000
GEORGE BARKER,
77, Colmore Row, Birmingham,
Agent for Applicant.