Improvements in or relating to Lamp-signals suitable for Use on Railways and Tramways.
Year: 1898

page_text: Date of Application, 2nd Dec., 1858
Complete Specification Left, 26th Sept., 1899-Accepted, 4th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Lamp-signals suitable for Use on
Railways and Tramways.
I, SIDNEY PRESCOTT WOOD, Manager for Messrs. McKenzie and Holland, of
Newport, in the Colony of Victoria, Engineer, do hereby declare the nature of
this invention to be as follows:-
When a disc or target signal of the kind exemplified in the Specification of a
patent previously granted to me, dated 17 April 1889, and numbered 6607, is used
in connexion with points or switches, an indication is given only as to the state
of one road, and therefore an engine-driver is at times obliged to pass a danger-
signal. A lamp-signal according to the present invention, on the contrary, is
so constructed that a danger signal and an all right" signal, or an all
right" signal and a danger" signal, can be given for the two roads respectively,
as required. An example of such a signal is shown in the accompanying illus-
trative drawings, whereof
Fig. 1 is a front elevation thereof,
Fig. 2 is a view similar to Fig. 1 but showing the target as having been shifted
to correspond to an altered position of the points,
Fig. 3 is a side elevation of the lamp with the target removed,
Fig. 4 is a horizontal section of the lamp and the target,
Fig. 5 is a vertical central section of the lamp corresponding to the line 5-5
of Fig. 4, and
Fig. 6 is a front elevation of the lamp;
Figs. 4, 5, and 6 are drawn to a larger scale than Figs. 1, 2 and 3.
The target A is made in the form of a hollow square prism of such dimensions
as to surround the lamp B. In each face of the target two bull's-eye lenses C C₁
are placed of such colours as may be desired to give a "danger" and an "all
right" signal respectively. Each face of the target is also painted in such
colours and manner as will indicate " danger" and "all right" (say red and
white) in the portions corresponding to the bull's eyes C and C¹ respectively, as
indicated by the hatching in Figs. 1 and 2.
This target is attached to an ordinary disc-target carrier D, which is mounted
to revolve partially round the lamp.
The lamp B is of the ordinary disc-lamp type but is provided with four
reflectors E E arranged in such a manner that the rays of light from the burner F
will be thrown, in the directions in which indications are to be given, upon two
opposite pairs of the lenses C C placed in the target. A sheet G of plain glass
is provided in each of the faces of the lamp that are turned in the directions just
mentioned, this sheet of glass being of such a width and so placed as not to
interfere with rays of light proceeding from the burner F and directed by the
reflectors E towards the bull's-eyes C and C¹.
The lenses are so arranged that when the points are moved and the target
actuated a danger" bull's-eye will take the place of an "all right" bull's-eye
"
and in some

page_text: Although I have described a lamp having a single burner and provided with
reflectors, other means such as a lamp having two burners, may be employed to
illuminate a target having one or more couples of pairs of bull's-eyes such as
described; also instead of having a fixed lamp and a rotary target, the lamp may
be rotary and the target fixed thereto, in the latter case a pair of reflectors being
preferably provided for each pair of bull's eyes.
Improvements in or relating to Lamp-signals suitable for Use on
Railways and Tramways,
I, SIDNEY PRESCOTT WOOD, of the Firm of Messrs. McKensie and Holland, of
Newport, in the Colony of Victoria, Engineer, do hereby declare the nature of
this invention, and in what manner the same to be performed, to be particularly
described and ascertained in and by the following statement:-
-
«
When a disc or target signal of the kind exemplified in the Specification of
Letters Patent dated 17 April 1889 and numbered 6607, is used in connexion
with points or switches, an indication is given only as to the state of one road or
track, and therefore an engine-driver is at times obliged to pass a 'danger"
signal. A lamp-signal according to the present invention, on the contrary, is
so constructed that a danger" signal and an "all right" signal, or an
right" signal and a "danger" signal, can be given for the two roads or tracks
respectively, as required. An example of such a lamp-signal is shown in the
drawings filed with my Provisional Specification, whereof
"
Fig. 1 is a front elevation of the lamp-signal.
all
Fig. 2 is a view similar to Fig. 1 but showing the target as having been shifted
to correspond to an altered position of the points,
Fig. 3 is a side elevation of the lamp with the target removed,
Fig. 4 is a horizontal section of the lamp and the target,
Fig. 5 is a vertical central section of the lamp corresponding to the line 5
of Fig. 4, and
Fig. 6 is a front elevation of the lamp;
Figs. 4, 5, and 6 are drawn to a larger scale than Figs. 1, 2 and 3.
The target A is made in the form of a hollow square prism of such dimensions
as to surround the lamp B. In each face of the target two bull's-eye lenses C C¹
are placed of such colours as may be desired to give a "danger" and an
66 all
right" signal respectively. Each face of the target is also painted in such
colours and manner as will indicate "danger" and "all right" (say red and
white) in the portions corresponding to the bull's eyes C and C¹ respectively, as
indicated by the hatching in Figs. 1 and 2.
This target is attached to an ordinary disc-target carrier D, which is mounted
to revolve partially round the lamp
The lamp B is of the ordinary disc-lamp type but is provided with four
reflectors Earranged in such a manner that rays of light from the burner F will be
thrown, in the directions in which indications or signals are to be given, upon two
opposite pairs of the lenses C C₁ placed in the target. A sheet G of plain glass

page_text: is provided in each of the faces of the lamp that are turned in the directions just
mentioned, this sheet of glass being of such a width and so placed as not to
interfere with rays of light proceeding from the burner F and directed by the
reflectors E towards the bull's-eyes C and C¹.
The lenses are so arranged that when the points are moved and the target
actuated a danger" bull's-eye will take the place of an "all right" bull's-eye
and vice versa.
Although I have described a lamp having a single burner and provided with
reflectors, other means, as a lamp having two burners, may be employed to
illuminate a target having one or more couples of pairs of bull's-eyes such as
described; also instead of having a fixed lamp and a rotary target, the lamp may
be rotary and the target fixed thereto, in the latter case a pair of reflectors being
preferably provided for each pair of bull's eyes.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
"
1. A lamp and target signal of the kind herein referred to, constructed so as
to give for two railway or tramway tracks connected by points a "danger "
signal and an "all-right" signal, or an "all-right" signal and a danger
signal respectively as required by the points, substantially as herein described.
2.-A lamp and target signal according to the preceding claim, wherein the
target is in the form of a hollow square prism surrounding the lamp and each of
its faces is provided with one danger" and one all-right" bull's-eye lens,
whilst the lamp is furnished with four reflectors arranged to throw light upon
two opposite pairs of the lenses in the target, substantially as described and
shewn.
66
3. A target for lamp and target signals according to Claim 1, each face of
which is provided with one danger" and one "all-right" bull's-eye lens, sub-
stantially as herein described and shewn.
4. My improved lamp and target signal constructed, arranged, and operating
as herein before described with reference to and shewn in the drawings filed with
my Provisional Specification.