Fog and Signal Lamp with Appliances.
Year: 1895

page_text: Date of Application, 30th Nov., 1895
Complete Specification Left, 27th Aug., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Fog and Signal Lamp with Appliances.
DAVID SHORT Marine Engineer 18 Frederick Street Sunderland do hereby
declare the nature of this invention to be as follows:-
A double lamp with two different coloured glasses, one for danger and one for
clear. It is under the sole control of the man in charge of the signal box.
Worked
by a light lever and wires.
When an approaching train passes the lamp showing
that the way is clear, by an applied lever (moved into position by the driver or
guard) fitted to either engine or van the said lever liberates the lamp shade thereby
showing the danger signal to a train that may be following, at the same time
throwing the lever in the signal box back into danger position, ringing a gong to
attract the attention of the man in charge that the train has passed.
Dated this 29th day of November 1895.
DAVID SHORT.
го али за нашр win Appпансер.
DAVID SHORT Marine Engineer 3 Jackson Street (late of 18 Frederick Street)
Sunderland 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 :-
The lamp is a double lamp having two distinct glasses of different colours. The
top glass to be the danger signal, and the bottom one to be the clear signal. The
lamp is held in position upon two wrought iron rods (fixed to an iron cage) and
carried down the post so that the lamp may be lowered for cleaning purposes.
The iron cage is also double. The inner cage being a little larger than the
lamp, and made of light cast iron.
The outer cage is much stronger and connected at the front, with a space between
it and the inner one, of one inch, to allow room for pulleys for working the shade.
The sbade which obscures the light, works freely upon two iron rods, marked 4,
on Sheet 1, (drawings) fitted upon the front of the cage. This shade is made of an
exact size to obscure only one light at a time. The ends being made long, to go
well into the recess between the outer and inner sides of the cage. This shade is
shewn on the drawing (Sheet No. 1) to be in a position obscuring half of each glass,
whereby the position of the glasses may be accurately ascertained. The shade is
entirely under the control of the signalman, and is moved into position by a light
lever in signal cabin, and attached to the shade by light wires, and chains, passing
over the pulleys in the recess.
When the clear light is showing, the shade is up and resting upon a pivot of a
lever or rod. (This lever or rod is kept in position by a small bracket shown
on Sheet No. 1, of the drawings, and marked 12.) The lever in the signal cabin is
then well back. When the approaching train comes into contact with the projecting
lever on the cage, it moves it to a position of about 45° from the perpendicular,
at the same time moving a lever at the back of the cage, which pulls the lever in

page_text: the signal box back into the danger position, ringing a gong placed in close
proximity to a hammer, screwed into the top of the lever handle.
At the same time
it also moves a small lever which is connected by links to a sliding rod, with an
inclined plane, throwing the pivot lever back and releasing the shade which falls
upon two rubber cushions. When the train has passed and the contact lever is 5
released, the whole of the mechanism automatically falls back into the danger
position.
By the cam sockets operating the levers, (which are loose on the shaft) a
train going in the opposite direction (as in shunting operations) does not affect the
signal in any way.
This signal to be worked by contact from a projecting lever on the engine cab, or
guard's van. Or by the substitution of a bell crank, or short lever, in the place of
the contact lever on the lamp cage, the signal can be worked by any of the wheel,
rail or underneath arrangements.
On Sheet No. 1 (drawings) the lamp and its appliances are shewn complete, with
the exception of the quadrant, and lever and gong for the signal box.
Sheet No. 2 shews the lamp in two views. B being the body of the lamp which
is made of copper or iron, hinged at the back. On the inside of the back there is
fitted a powerful fluted crystal reflector, concave in shape. On the outside of the
back, there are two tubes H, which are guides to work upon rods for lowering the
lamp for cleaning purposes. From the back of one side, to the back of the other,
there is a bar fitted to support the front glasses and act as a division between the
lights. C, shews the "danger" and D, the clear light. Those are to be of strong
cut glass.
The design and dimensions of those glasses are shewn on "Sheet 5," of the
drawings, and marked C.
The oil cistern, is made with two or more tubes passing through it from top to
bottom, with open ends, to admit of a free passage for air to the interior of the
lamp.
Burners -Two in number, of design most suitable for oil to be used.
When gas is used, the two signal glasses are fixed in a frame and made so that
they may slide up for cleaning.
7. is the sliding bar with the inclined plane, which works in the gab of the pivot
lever 5.
10, and 11, are the connecting links which are coupled up to the lever V, which
gives motion to the sliding bar, throwing the pivot back and allowing the shade to
drop.
Sheet No. 3 shows, front, side and back view of the cage E, which is of cast
iron, flanges top and bottom for fixing it to posts, bridges or girders.
15. are lugs to carry the lamp guide rods. 1. are lugs to carry the shade guide
rods, the rods passing through them free, and screwed into the lower lugs 2. On
the top of the lugs 2. there are two rubber rings to act as a cushion for the
shade.
(On Sheet No. 1 :-3, 3, shows the rubbers.) There are two slots in the front,
one on each side to admit of the ends of the shade to pass into the recess between
the inner and outer wall of the cage.
9. are the guides for the sliding bar, (the caps for those guides are shewn
on Sheet 1 Re., 8). The slot between those guides is for the pivot.
G, are the two brackets to carry the shaft. K, spindle holes to carry the
pulleys P (position variable according to the lead of the wires).
17, brackets to carry the pivot lever.
Sheet 4 shews the plan and side view of the shade A. (Front view
on Sheet 1.) 13 is the lever which is fitted loose on the shaft F, at the back of
the cage. This lever is connected by wires to the lever H, in the signal box.
H, is fitted into a quadrant Q which may be any length to take a number of levers.
On the top of H is screwed the hammer to sound the gong. 16, are the cam
sockets, which are keyed on the shaft to give motion to the two levers 13, & V.

page_text: Contact lever 6, and weight 14. are fully shewn on Sheet No. 1. O, shewing the
point of contact.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same has to be performed, I declare what I
claim is
1st. The construction of the lamp to suit the signalling appliances.
2nd. The appliances whereby a passing train, automatically closes the “clear-
Contact lever 6, and weight 14. are fully shewn on Sheet No. 1. O, shewing the
point of contact.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same has to be performed, I declare what I
claim is
1st. The construction of the lamp to suit the signalling appliances.
2nd. The appliances whereby a passing train, automatically closes the "clear-
sigual and opens the "danger signal.
3rd. The "connection with the signal cabin" as herein described.
The "whole" to be worked in one combination.
Dated this 26th day of August 1896.