Improvements in Fog Signals for Railways and the like.
Year: 1897

page_text: Date of Application, 19th Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Fog Signals for Railways and the like.
We, BENJAMIN EDWARD DICKINSON, and MESSRS. KYNOCH LIMITED, Manu-
facturers, all of Lion Works, Witton, in the County of Warwick, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to fog signals for railways and the like, and its object is
to improve upon existing constructions of such signals in order to make the
signals more water tight, and at the same time to put the detonating caps in a
safer position, so as to avoid the chance of detonating accidentally. Our invention
further relates to the attachment of the lead or other strip intended to bind
the fog signals to the rail.
In carrying out our invention as applied to single fog-signals we form on the
centre of the lower plate a circular depression. In this depression we fix the
detonators. By this device we ensure that the detonators occupy a truly central
position, and thereby removed as far as possible from the crown of the fog-signal.
As at present constructed the detonators are sometimes attached at a point near
the curve of the crown, and so are liable to be prematurely exploded by a slight
movement of the dome of the signal. By our device of a central depression we
ensure that the caps are always attached at the right place. To fasten the dome
to the bottom plate we flange the dome over the bottom plate, and leave a con-
siderable flat ledge outside the dome, and so secure a metal to metal contact
which is quite water tight without solder or its equivalent. This construction
is applicable to single and to duplex and other fog signals.
In order to fasten the lead or other strip for attaching the signal to the rail
in an effective manner we provide a strong metallic clip comprising a central
part with edges bent over on both sides forming a groove or channel through which
the strip passes. Projections from the plate carrying this groove part or trough
part pass over the edges of the fog signal between the two parts when a duplex
signal is used, and along the bottom plate when a single signal is used.
By the application of these improvements fog signals are rendered safer
from premature explosion, thoroughly water tight without solder or paint,
and easily and firmly attachable to the rails without the use of solder for attaching
the lead or other strip.

page_text: We, BENJAMIN EDWARD DICKINSON, and KYNOCH LIMITED, Manufacturers,
all of Lion Works, Witton, in the County of Warwick, 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:-
Our invention relates to fog signals for railways and like services and its object
is to improve upon existing constructions of such signals so-that they may be
rendered more water-tight, and at the same time to put the detonating caps in a
safer position therein so as to avoid the chance of detonating accidentally. Our
invention further relates to the attachment of the lead or other soft metal strip
intended to bind the fog signals to the rail.
Our invention is illustrated in the accompanying drawings in which
Figure 1 represents a side elevation of a duplex fog signal.
Figure 2 is a plan.
Figure 3 is a vertical section on the line y Figure 2 and
Figure 4 is a plan of the bottom plate the upper plate being removed.
In carrying our invention into effect as applied to duplex fog signals and as
illustrated in the accompanying drawings we form in the centre of the lower
plate A a circular depression K into which we fix the anvils or nipples B B for
the reception of the detonators CC. By such means we ensure that the detonators
shall occupy a truly central position, and be thereby removed as far as possible
from the crown of the fog signal. In fog signals as usually constructed the de-
tonators are attached at a point nearer the curve of the crown, and so are liable
to be prematurely exploded by a slight movement of the dome of the chamber.
To fasten the upper plate E to the lower plate A we flange the edge E¹ over
the lower plate, and leave a considerable flat ledge outside the domes and so
secure a metal to metal contact which is quite water-tight without the use of
solder or its equivalent. This construction is applicable to single, duplex and
other fog signals..
In order to fasten the lead or other soft metal strip G used for securing the
signal to the rail, we provide a strong metallic clip F comprising a central part
with clipping edges ff bent over on both sides forming a groove or channel in
which the strip G is retained; such clip resting upon the face of the upper plate E
at the part intermediate of the domes or explosion chambers, and is secured in
position by its extremities fl f¹ being bent over the edge E¹.
In the production of a single chambered signal the clip F may be secured upon
the underface thereof.
By the application of these improvements fog signals are rendered safer from
premature explosion, thoroughly water-tight without solder, paint or varnish
and easily and firmly attachable to the rails without the use of solder for attaching
the lead or other soft metal strip.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is: :―
1. In a fog signal such as herein before described the attachment of the upper
plate to the lower plate by bending over the edges, for the purpose described.
2. In a fog signal such as herein before described, the formation of a central
depression for the reception of the caps or detonators, for the purpose described.
3. In a fog signal such as hereinbefore described the atachment of the soft metal

page_text: holding strips to the signal by means of a hard metal clip, substantially as
described.
4. An improved fog signal constructed substantially as and for the purposes
hereinbefore described.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and,
13, Temple Street, Birmingham, Agents.