IMPROVEMENTS IN HAND SIGNAL AND OTHER RAILWAY LAMPS
Year: 1869

page_text: LETTERS PATENT to Samuel Wilson Clark, of Tower Royal, in the
City of London, and William Robert Sykes, of Clapham, in the
County of Surrey, for the Invention of "IMPROVEMENTS IN HAND
SIGNAL AND OTHER RAILWAY LAMPS."
Sealed the 7th September 1869, and dated the 17th May 1869.
PROVISIONAL SPECIFICATION left by the said Samuel Wilson Clark
and William Robert Sykes at the Office of the Commissioners of
Patents, with their Petition, on the 17th May 1869.
We, SAMUEL WILSON CLARK, of Tower Royal, in the City of London,
and WILLIAM ROBERT SYKES, of Clapham, in the County of Surrey, do
hereby declare the nature of the said Invention for "IMPROVEMENTS
HAND SIGNAL AND OTHER RAILWAY LAMPS," to be as follows:-
Our Invention relates to hand signal, station, and other lamps used
on railways for the purpose of signalling by showing lights of different
colors.

page_text: The object of our improvements is chiefly to construct hand signal
lamps so that they may be manipulated or worked by the same hand
as that by which they are held, the other hand being left free for
other uses.
The Invention mainly consists in placing two or more different colored
shades curved or flat glasses in a casing within the lamp, which casing
works on a central pivot placed in the lamp casing proper and on the
lower part of the same. Upon the upper part of the lamp casing are
three or more rollers, upon or against which the internal shade casing
revolves or turns, and upon the edge of this casing there are three or
more indentations to act as stops to the various glass shades, by means
of which they remain secure in proper position.
The rollers may be
placed in various positions, either internally or externally, to the lamp
casing or casings. Upon the upper part of the shade casing is a knob
or handle, either of non-conducting material or insulated by a non-
conducting material; by a slight movement or turn of this knob or
handle the internal shade casing is made to revolve, so as to change the
light. A side spring maintains the shade casing in place, and at the
same time acts as a stop to the shade casing.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Wilson Clark and William Robert Sykes in
the Great Seal Patent Office on the ember 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, SAMUEL.
WILSON CLARK, of Tower Royal, in the City of London, and WILLIAM
ROBERT SYKES. of Clapham, in the County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of May, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Samuel Wilson Clark and William Robert
Sykes, Her special licence that we, the said Samuel Wilson Clark and
William Robert Sykes, our executors, administrators, and assigns, or such

page_text: placed in various positions, either internally or externally, to the lamp
casing or casings. Upon the upper part of the shade casing is a knob
or handle. either of non-conducting material or insulated by a non-
conducting material; by a slight movement or turn of this knob or
handle the internal shade casing is made to revolve, so as to change the
light. A side spring maintains the shade casing in place, and at the
same time acts as a stop to the shade easing.
Figure of the accompanying Drawings is a side elevation of a hand
signal lamp constructed according to our Invention; Figure 2 is a
section of the same through the line 1
- 2 of Figure 1: Figure 3 is
a side elevation of the internal shade casing detached; and Figure 4 is a
view of the under side of this casing.
a is the lamp easing proper provided with a side handle b, swing
handle c, and mouth d, as usual; e is the internal shade casing; this is
divided into three equal parts f, f", ", one of which is left open so as
to allow the lamp to give a white light to indicate "all clear," while the
other two parts /, /", receive respectively a green and a red glass or
shade (g and g") indicating respectively "caution" and " danger."
The internal casing e carries at bottom a bracket h formed with an
aperture i to fit upon a central pivot placed at the bottom of the outer
casing a; this pivot is shown at k in Figure 5, herein-after described.
1, 1, 1, are rollers upon the upper part of the outer casing a, against
which the internal casing e turns or revolves. Upon the upper edge of
the internal casing e are three indentations m to act as stops in the three
positions of the casing, and n is a side spring to take into these stops.
This spring also serves to hold the internal casing e in place within the
outer casing a. The stops m opposite the two colored glasses g', g", are
such as to quite prevent the internal casing being rotated further, but
the stop opposite the open or "all clear " part f of the internal casing is
what may he termed a "half stop," that is to say, the internal casing is
capable of being rotated past it. The top of the lamp is connected to
and rolates with the internal casing e, and carries a knob or liandle o of
wood or other suitable material, by which the internal casing may be
rotated.

page_text: Segond. The general combinations or arrangements of parts of lamps
as herein-before described and represented in the accompanying
Drawings.
In witness whereof, 1, the said Samuel Wilson Clark, for myself
and on behalf of the said William Robert Sykes, have hereunto
set my hand and seal, this Fifteenth day of November One
thousand eight hundred and sixty-nine.
Witness,
J. C. MEWBURN,
l'atent Agent,
172, Fleet Street,
London.
SAM. W. CLARK. (L.S.)