Certain Improvements in or connected with Detonating Fog Signals.
Year: 1896

page_text: Date of Application, 30th Nov., 1896
Complete Specification Left, 30th Sept., 1897-Accepted, 30th Oct., 1897
Certain Improvements in or connected with Detonating Fog Signals.
I, FREDERICK ARCHER LUDLOW, of 6, Andover Street, in the City of Birming
ham, Detonating Fog Signal Manufacturer, do hereby declare the nature of this
Invention to be as follows:-
This Invention has reference to detonating railway fog signals of the kind
which is provided with a metal arm like tang or plate for the purpose of carrying
the detonator from the tumbler by which the detonator is placed in position on
the line as described in the Specification of Woodhead's Patents Nos. 1103 of
A.D. 1891, and 24031 of A.D. 1892. Heretofore the said metal tang or plate has
been constructed so as to clip and hold only one detonator, and in order to afford
greater certainty of the detonator being exploded by the engine of the train the
said detonator case has sometimes been made with two or more separate compart-
ments each containing a supply of caps and gun-powder so that if for some reason
one chamber should misfire the other chamber would probably explode.
My Invention consists in so constructing the said tangs or plates that two or
more detonators can be fixed to one tang or plate side by side so as to explode one
after the other in quick succession and thus cause a louder report or a series of
reports and also prevent the possibility of a misfire.
According to one arrangement of carrying out my Invention the said tang or
plate to which say two detonators are required to be fixed, is pierced with two
holes at a short distance apart and sufficiently large to admit the usual lead
strips which are fixed to the base of the detonator. The said lead strips are threaded
through these holes in the tang or plate and bent backwardly underneath thus
securing the two detonators in position side by side on the tang or plate ready for
fixing to the tumbler of the apparatus by which the detonators are placed on the
rails. The said tang or plate pierced for fixing to two or more detonators as
stated above, is or may be also made with the usual side clips which are turned
up to hold the single detonator so that the said tang or plate will then serve for
holding either a single detonator or two detonators as may be required.
Instead of the said detonators being fixed to the said tang or plate by the usual
lead strips passing through the holes in the tang or plate as above described, the
said tang or plate may be made with two or more sets of clips or tongues,
according to the number of detonators which it is required to hold, these clips or
tongues being bent upwardly to clip the bases of the detonators and secure the
same thereto. Or other means may be employed for holding two or more detona-
tors to one tang or plate so as to explode one after the other as stated above.
Dated this 28th day of November 1896
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Certain Improvements in or connected with Detonating Fog Signals.
I, FREDERICK ARCHER LUDLOW, of 6, Andover Street, in the City of Birming-
ham, Detonating Fog Signal Manufacturer, 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:-
This Invention has reference to detonating railway fog signals of the kind
which is provided with a metal arm like tang or plate for the purpose of carrying
the detonator from the tumbler by which the detonator is placed in position on
the line as described in the Specification of Woodhead's Patents Nos. 1103 of
A.D. 1891 and 24031 of A.D. 1892. Heretofore the said metal tang or plate has
been constructed so as to clip and hold only one detonator, and in order to afford
greater certainty of the detonator being exploded by the engine of the train the
said detonator case has sometimes been made with two or more separate compart-
ments each containing a supply of caps and gun-powder so that if for some reason
one chamber should misfire the other chamber would probably explode.
My Invention consists in constructing the said tangs or plates as hereinafter
described so that two or more detonators can be fixed to one tang or plate side by
side so as to explode one after the other in quick succession and thus cause a
louder report or a series of reports and also prevent the possibility of a misfire.
In carrying out my Invention the said tang or plate to which say two detonators
are required to be fixed is made with two or more sets of clips or tongues according
to the number of detonators which it is required to hold, these clips or tongues
being bent upwardly to clip the bases of the detonators and secure the same
thereto.
On the accompanying drawing Fig. 1 is a plan and Fig. 2 is an end elevation
of one form of my improved tang or plate holding two detonators;
Fig. 3 is a plan of the tang or plate alone before the detonators are fixed thereto
and
Fig. 4 is a plan of another form of my improved tang or plate with two detona-
tors fixed thereto.
The same letters of reference indicate the same or corresponding parts in all
the figures of the drawing.
A¹A³ are the two detonators and B is the tang or plate to which the detonators
are fixed and which is made with the usual arm part bi for holding on the tumbler
of Woodhead's apparatus above referred to.
I make the head part of the tang or plate B wide enough as shewn to receive
the two detonators A¹ A side by side at a short distance apart and in order to
fix the two detonators to the plate B the latter is made with the two sets of
upwardly projecting clips or tongues marked b3 which are bent upwardly so as to
receive the detonators and when the latter have been placed between the clips 63
the latter are closed around and over the detonators as shewn in Figs. 1, 2 and 4
so as to effectually secure the detonators and plate or tang B together and prevent
the second detonator being blown off the plate by the explosion of the first detona-
The clips may either be formed of portions which are bent up out
of the body of the plate B as in Figs. 1, 2 and 3 or these clips or tongues 63
may as
shewn in Fig. 4 be formed of parts which are bent up from the edges of the plate.
tor.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In a plate or holder of the kind herein referred to for detonating fog signals
the combination with the arm part 6 of the head 62 made with two sets of

page_text: upwardly projecting clips or tongues such as 63 adapted to be closed around and
upon the two detonators and hold the same at a short distance apart side by side
substantially as hereinbefore set forth.
2. The improved tang like plate or holder for two detonating fog signals having
in combination with the arm part 6 the head 3 provided with the two sets of
upwardly projecting clips adapted to hold the two detonators side by side at a
short distance apart substantially as hereinbefore described and illustrated by
Figs. 1, 2 and 3 or by Figure 4 of the accompanying drawing.
3. The herein described detonating fog signal consisting of the plate B and the
two detonators AA held thereby the said plate being made with the arm part b¹
and with the two sets of upwardly projecting clips which clip and hold the
detonators to the plate all substantially as hereinbefore described and illustrated
by Figs. 1 and 2 of the accompanying drawing.
4. The herein described improved detonating fog signal consisting of the plate B
and the two detonators A¹ A2 held thereby the said plate being made with the
arm part band with the two sets of upwardly projecting clips which clip and
hold the detonators to the plate all substantially as hereinbefore described and
illustrated by Fig. 4 of the accompanying drawing.
Dated this 29th day of September 1897.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.