Improvements in Railway Signalling and other Lamps.
Year: 1891

page_text: Date of Application, 4th May, 1891
Complete Specification Left. 4th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Railway Signalling and other Lamps.
I, WALTER GEORGE HADLEY, of 64 Hylton Street, Vyse Street, in the City
of Birmingham, Tin-plate Worker, do hereby declare the nature of this invention
to be as follows:-
My invention relates to an improved method of constructing and arranging
signalling lamps in which three colours, as white, red and green require to be
exhibited as desired by one lamp, and consists in modifying the action of the slides
or sliding frames or pieces carrying the coloured glasses. In most lamps at present
used the coloured glasses are contained in one frame or slide which is rotated from
above to exhibit the colour desired. This mode of. construction is inconvenient
inasmuch as if one of the glasses should be broken or require replacing the whole
frame requires to be removed and this involves taking the lamp asunder. According
to my invention I arrange the glasses in two separate sliding pieces or frames which
are readily slipped in from the front of the lamp and I slide the frames in separate
grooves or channels on both sides of the front opening, which opening is closed
by a door carrying white glass.
The frames or slides are moved by knobs projecting through slots in the front
of the lamp body and if it is desired can be moved from the top or back also.
A lamp arranged in this manner has the great advantage that if one or both of
the glasses requires replacing it is easy to take each slide or frame out of the
lamp separately and replace the glass without taking the lamp to pieces or causing
trouble of any kind. The projecting knobs are screwed or otherwise attached in a
removable manner as to permit of the frames being detached.
By this simple mode of construction and arrangement, I very much improve
upon existing methods of constructing signalling lamps and obtain among others
the following advantages:-I avoid the unpleasantness of having the handle
twisted across the lamp when showing the coloured lights, and likewise dispense
with the thumb spring at the back which is ordinarily used in such lamps.
I also obtain a much lighter lamp.
My invention relates further to an improved method of fastening the front glass
of a signalling or other lamp to allow of easy and rapid replacement of the glass
in the event of breakage. In applying my invention to the case of a circular front
glass with bevelled edge I arrange the usual circular expanding or conical projec-
tion from the front of the lamp and I form a small turned up or flanged edge upon
it. To fit this edge I construct a ring hinged at one side to open up and slip over
the circular edge and fitted with a convenient fastening such as a screw at the
other side. I place the glass against the expanding or conical projection and pass
the divided or hinged ring over it and close it up, the interior of the ring being
made hollow so as to allow it to clip both the bevelled edge of the glass and the
edge of the conical projection all round the circle. The fastening screw is then
put into place and when screwed home the two halves of the hinged ring are
firmly pulled together and so the bevelled edge glass is securely held to the face
formed for it.
Instead of a hinge being used the ring may be of two or more separate segments,
which segments are placed round the circle securing the glass to the lamp and
fastened to each other by screws or other fastening contrivances.
The ring may be constructed of semicircular tube, trough, or channel section and
of any convenient depth to securely clip the front glass to the metal edge of the
lamp front. Sometimes I dispense with the hinge and spring out the ring to

page_text: slip over the glass and circular edge with similar effect or I use an elastic or
spring connection instead of a hinge.
By this device I am enabled to insert or replace a front glass with the maximum
amount of rapidity and ease.
Do
1001
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Railway Signalling and other Lamps.
I, WALTER GEORGE HADLEY, of 64, Hylton Street, Vyse Street, in the City
of Birmingham, Tin Plate Worker, 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 :-
My invention relates to an improved method of constructing and arranging
signalling lamps in which three colours as white, red and green require to be
exhibited as desired by one lamp, and consists in modifying the action of the
slides or sliding frames or pieces carrying the coloured glasses. In most lamps
at present used the coloured glasses are contained in one frame or slide which
is rotated from above to exhibit the colour desired. This mode of construction
is inconvenient, inasmuch as if one of the glasses should be broken or require
replacing the whole frame requires to be removed, and this involves taking the lamp
asunder.
Referring to the two appended sheets of explanatory drawings-
Figures 1, 2 and 6 show respectively front elevation, sectional side elevation
and sectional plan of a signalling lamp constructed in accordance with my present
invention.
Figures 3 and 4 show front elevation and sectional side elevation respectively
of an improved method of attaching the front glass to the door of a signalling or
other lamp; while Figure 5 shows another similar method of carrying this into
effect.
. According to my invention as illustrated in the two accompanying sheets of
explanatory drawings, I arrange the glasses A, A¹ in two separate sliding pieces
or frames B, B' which are readily slipped in from the front of the lamp, and I
slide these frames in separate grooves or channels C, C' on both sides of the front
opening D, which opening is closed by a door E carrying white glass F. The
frames or slides B, B' are moved by knobs G projecting through slots H in the
front of the lamp body, and if it is desired can be moved from the top or back
also.
A lamp arranged in this manner has the great advantage that if one or both of
the glasses A, A¹ requires replacing it is easy to take each slide or frame B, B¹
out of the lamp separately and replace the glass without taking the lamp to pieces
or causing trouble of any kind. The projecting knobs G are screwed or otherwise
attached in a removable manner so as to permit of the frames being detached.
By this simple mode of construction and arrangement I very much improve upon
existing methods of constructing signalling lamps and obtain among others the
following advantages :-
I avoid the unpleasantness of having the handle K twisted across the lamp when
showing the colour lights, and likewise dispense with the thumb spring at the
back which is ordinarily used in such lamps. I also obtain a much lighter lamp.
My invention relates further to an improved method of fastening the front
glass F of a signalling or other lamp to allow of easy and rapid replacement of
the circular or other shaped glass in the event of breakage. In applying my
invention to the case of a circular front glass with bevelled edge as illustrated in
elevation at Figure 5 and in sectional side elevation at Figure 4, I arrange the

page_text: usual circular expanding or conical projection L from the front of the lamp, and
I form a small turned up or flanged edge L' upon it. To fit this edge I construct
a ring M sometimes hinged at one side as shown in Fig. 5 to open up and slip over
the circular edge and fitted with a convenient fastening such as a screw N at the
other side. I place the glass against the expanding or conical projection L and
pass the divided or hinged ring over it, and close it up, the interior of the ring
being made hollow so as to allow it to clip both the bevelled edge of the glass and
the edge of the conical projection all round the circle.
The fastening screw N is then put into place and when screwed home the two
halves of the hinged ring are firmly pulled together and so the bevelled edge glass is
securely held to the face formed for it.
Instead of a hinge being used the ring may be of two or more separate segments,
which segments are placed round the circle securing the glass to the lamp and
fastened to each other by screws or other fastening contrivances.
The ring may be constructed of semicircular tube, trough, or channel section
and of any convenient depth to securely clip the front glass to the metal edge of
the lamp front.
Sometimes I dispense with the hinge and spring out the ring as shown at Figure 3
to slip over the glass and circular edge with similar effect or I use an elastic or
spring connection instead of a hinge.
By this device I am enabled to insert or replace a front glass with the maximum
of rapidity and ease.
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) The construction and arrangement of railway signalling and other lamps
having sliding coloured glasses operated by means of projecting knobs or mounts
substantially as and for the purposes herein described and as illustrated in the
accompanying drawings.
(2) In signalling lamps and lamps for like purposes the application of sliding
glasses mounted in frames and capable of being moved in front of the light by
means of projecting buttons or knobs working in slots or channels formed within
the body or case of the lamp substantially as herein described and as illustrated in
the accompanying drawings.
(3) In railway signalling and other lamps the construction and arrangement of
hinged or spring clip rings for securing the front glass or white light substantially
as herein described and as illustrated in Figures 3 and 4 of the accompanying
drawings.
Dated this 3rd day of February 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.