Improvements in Signal Lamps.
Year: 1889

page_text: Date of Application, 12th June, 1889-Accepted, 20th July 1889
COMPLETE SPECIFICATION.
[Communicated from abroad by HUGO PATAKY and WILHELM PATAKY, both of
Koniggratzer Strasse, 41, Berlin, Germany, Civil Engineers.]
Improvements in Signal Lamps.
I, FREDERICK JOHN CHEESBROUGH, of 15 Water Street Liverpool in the County of
Lancaster, Patent Agent, 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 :-
The object of the invention is to construct a cast iron signal-lamp suitable for
engines, coaches, switches, and other places on a rail road where a signal lamp is
required to be fixed in position, the said lamp being arranged so that its top may
be easily removed for the purpose of cleaning it, its door arranged so that when
open its weight shall not be solely borne by the hinge, and when made for a coach
or engine lamp, adjustable glasses are provided by which the signal can be changed
without turning the lamp; and it consists essentially, of the arrangement of parts
hereinafter described.
Figure 1, is a perspective front view of a signal lamp, partially in section, containing
my improvements.
Figure 2 is a perspective back view of a signal lamp containing my improvements,
with its hinged door thrown open.
Figure 3 is a detail of the removable top.
4
"
19 "9
perspective view of the switch lamp.
In the class of signal lamps to which my improvements are applied, the lenses are
placed opposite to each other, and are of different colors, and the signal is changed
by simply turning the lamp so as to expose the particular color in the direction it
is desired to signal. When the lamp is placed in front of an engine so as to give
the danger signal, the white or clear glass faces the engineer, and the light thus
reflected in his face seriously interferes with his proper sight of the road in front
of his engine.
In my improved lamp, when made for an engine or coach, I dispense with one
lens, and substitute for it a back or door A, which is hinged to the lamp-case B
as indicated. This door, when closed effectually cuts off the rear view of the light
which can only be seen by the engineer from his place on the engine, through a
small hole b, which hole is made just large enough to enable the engineer to see
that the light in the lamp is burning. Immediately behind the lens C (which is
only shown in dotted lines in Figure 1) I form a guide D, or, when the lamp is
constructed as shown in the drawing, I make a double guide to hold two glasses E
and F; E being red, and F green. G is a rod connected to the glass-case E. and
H is a rod connected to the glass-case F. As shown in Figure 1 the glass E, is raised,
and the glass F, lowered; the latter being in front of the light in the lamp, so that the
green or caution signal is exposed. The red glass, E, is held up by a pin, 1,
attached to a spring J, and extending into a hole made in the rod G as indicated.
When it is desired to show the white signal, the glass F, is raised and held in the
same manner as the glass E. From this description it will be noticed that the
character of the signal may be instantly changed without turning the lamp. The
top K is connected to the plate L, which plate is designed to slide into the guides M,
connected to the lamp-case B, as indicated. The plate L, has a flange b, formed on it,
and is held in position by the spring-catch N as shown. Chains O are connected at
one end to the lamp-case B and at the other end to the door A so as to support the
said door and relieve its hinge from strain when the door is open, as indicated
in fig. 2.

page_text: The lamp shown in figure 4 has a sliding top and chains to support its hinged door,
but the said door has a lens in it, and instead of one lens in the lamp there are four
Jenses.
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.) A lamp-case having a colored glass adjustably located between the lens and the
light, substantially as and for the purpose specified.
2.) A lamp-case B, having a lens, C on the side, with a door A, having a small
hole a, on its opposite side; substantially as and for the purpose specified.
3.) A lamp-case B, provided with a lens C, and suitable guides D, located
immediately behind the lens, in combination with a colored glass provided with a
suitable handle or rod, and adjustably held in the guide D; substantially as and for
the purpose specified.
1
4.) The top K, secured to the plate L and adjustably fitted into the guides M in
combination with the spring-catch N; substantially as and for the purpose specified.
5.) The door A, hinged to the lamp-case B, in combiration with the chains O;
substantially as and for the purpose specified.
6.) The signal lamp made; substantially as shown in figure 1.
.7.) The signal lamp made; substantially as shown in Figure 4.
Dated this 11th day of June 1880
FREDERICK JOHN CHEESBROUGH.
By Cheesbrough & Royston,
15, Water Street, Liverpool, Patent Agents.