An Improved Tricolor Hand Signal Lamp.
Year: 1896

page_text: Date of Application, 29th Oct.. 1896-Accepted, 9th Jan., 1897
COMPLETE SPECIFICATION.
An Improved Tricolor Hand Signal Lamp.
PARAN CHUNDER CHATTERJEE, Government Railway Depot Store Keeper,
East Coast Railway, Waltair, British India, 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 improvements to facilitate the working of tricolor hand
signal lamps. In the hand signal lamps at present in use the parti-coloured
glasses, fixed in the inner revolving casing are made to revolve by means of the
suspension handle on top of lamp which often results in the jamming of the inner
casing with the burner and the burner and the outer casing, which on an emergency
is likely to cause accidents and to obviate these defects is the object of the present.
invention.
In the drawings annexed hereto and which are to be read as part of this
specification the same letters or numerals indicate the same parts in each.
figure.
Sheet 1.-Fig. 1 is a plan of top of lamp.
Fig. 2 is a side elevation of same.
Sheet 2.-Fig. 3 plan of collar.
Fig. 4 side view of do.
Fig. 5 plan of part of braces and bolt to which is suspended the inner
casing.
Fig. 6 an elevation of the same.
Fig. 7 a plan of the spring spanner with dog attached for revolving
inner casing.
Fig. 8 an elevation of same.
Fig. 9 an end view of same.
Fig. 10 a plan of a portion of top of inner casing showing the method
of securing the glasses in the frame.
Fig. 11 an elevation of the same.
This improved tricolor signal lamp which is illustrated in Figures 1 and 2
consists of the usual inner and outer casings A and B, the front glass C, the back
handle D, the footing piece E for seating the lamp, the burner F, the sloping neck
on top G the smoke vents H and H and the hanging handle J, which has.
hitherto been used for revolving the inner casing and the reflector K-all these
parts are old.
In this improved lamp the inner revolving casing has the glasses fitted into the
sides by means of buttons L so as to allow of their being easily replaced should one
get broken whereas in the old lamp they were immoveably fixed and the lamp.
became useless when a glass got broken.
The new arrangement for working the inner revolving casing is as follows:-
The vertical bolt M has on its base two nuts N and N¹ between which is jammed
two cross braces O standing at right angles to each other and the outer ends of
which are flanged downwards and rivetted to the top rim of the revolving inner
casing. The bolt M passes up through G, H and H' and is suspended on the
lantern roof H' by a notched collar P, attached to roof, fitted on its head and in
which it revolves. Immediately above the collar P the bolt M has a squared head Q.
to receive the square socket R of the spring dog spanner S for the purpose of

page_text: rotating it. The dog spanner consists of two parts S and S2 hinged together by
hinge and a spring U keeps the two handles of the spanner apart and keeps the
dog tooth V set in one of the three notches W in the rim of collar P. To operate
and revolve the inner lamp casing the handles S1 and S2 are grasped and compressed
together, this releases the dog tooth V from notch W in the rim of collar P and
a turn of the wrist brings either a green, red or white light to the front of the
lamp.
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 :-
1. In a tricolor hand signal lamp the method of fitting the glasses in the inner
revolving casing substantially as hereinbefore described and illustrated, by the
accompanying drawings.
2. In a tricolor hand signal lamp the method of causing the inner casing which
holds the colored glasses to be revolved by means of the apparatus and appliances
substantially as hereinbefore described and illustrated, by the accompanying
drawings.
3. In a tricolor hand signal lamp the new combination resulting from combining
all the said several parts, old and new into a whole substantially as herein before
described and illustrated by the accompanying drawings, and for the purpose
specified.
Dated this 26th day of October 1896.
REGINALD W. BARKER,
Monument Chambers, London, E.C., Applicant's Agent.