Improvements in Detonator Holders or Clips for Use in Fog Signalling Apparatus on Railways.
Year: 1893

page_text: This Print is in accordance with the Original Specification as it stands after.
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed by
the decision of the Chief Examiner of the 2nd day of December 1897.
Complete Specification Left, 10th Sept., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Detonator Holders or Clips for Use in Fog
Signalling Apparatus on Railways.
I, JOHN GEORGE DIXON, of 98 Norman Road, Birkby, in the County of
York, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in holders or clips for detonators for use
in fog signalling apparatus on railways.
In most forms of mechanical fog signalling apparatus, the object of which is in
substitution of or as an auxiliary to the fogmen now employed, some sure and easy
method must be employed of placing the detonator on the rail.
The detonators are usually contained in a magazine.
My improved holder or clip consists of a piece of tin (or any other metal may be
employed) about the same width as the diameter of the detonator. In stamping
out the holder, lips or projections are stamped out at one end; the detonator is
placed on this end and the lips or projections are bent upwards and over the edge
of the detonator, holding it in position. The other end of the clip or holder is
made at a lower level. The bent portion joining the upper and lower levels of the
holder is approximately at an angle of 45 degrees to both. The lower level end of
the holder is at a depth from the higher level equal to the height of the detonator
above the higher level end. Two or more three sided cuts (or two sided in the
case of a triangular obstruction piece) are made in the lower level end and bent
upwards at right angles, the upper part touching the higher level piece, preventing
the possibility of the angular portion of one holder from being forced into the
corresponding portion of the next below it in the magazine. The lower level end
of the holder is that which is clipped by the jaws or forceps or other equivalent of
the mechanical fog signalling apparatus.
The great advantages of higher and lower level ends of holders, are (the
detonator being on the higher one) that while the detonator is in position on the
rail the jaws or other equivalent of the main apparatus are below rail level and out
of reach of harm or the wheels of the locomotive or carriages, and, furthermore,"
where a number of detonators are in a magazine each one must be forced into the
same position to be in line with the jaws or forceps for engagement to be placed on
the metals.. There are two points of contact or bearing, therefore, in holders, the
higher level end of one holder is supported by the detonator below it, and the lower
end next the detonator of the upper holder bears on the upper level end of the
underneath, holder..
My holder is applicable to any form of mechanical fog signalling apparatus,

page_text: whether automatic or non-automatic, or whether operated by the signal wire or
separate lever in the signal box.
Dated this 9th day of December 1893.
JOHN P. O'DONNELL,
70 and 71, Palace Chambers, Bridge Street, Westminster, S.W.,
Agent for the said Applicant.
Improvements in Detonator Holders or Clips for Use in Fog
Signalling Apparatus on Railways.
I, JOHN GEORGE DIXON of 98, Norman Road, Birkby, in the County of York,
Engineer, 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 relates to improvements in holders or clips for detonators for use
in fog signalling apparatus on railways.
In most forms of mechanical fog signalling apparatus, the object of which is in
substitution of or as an auxiliary to the fognen now employed, some sure and easy
method must be employed of placing the detonator on the rail.
The detonators are usually contained in a magazine.
My improved holder or clip consists of a piece of tin (or any other metal may be
employed) about the same width as the diameter of the detonator. In stamping
out the holder lips or projections are stamped out at one end; the detonator is
placed on this end and the lips or projections are bent upwards and over the edge
of the detonator, holding it in position. The other end of the clip or holder is
made at a lower level. The bent portion joining the upper and lower levels of the
holder is approximately at an angle of 45 degrees to both., The lower level end of
the holder is at a depth from the higher level equal to the height of the detonator
above the higher level end. Two or more three sided cuts (or two sided in the
case of a triangular obstruction piece) are made in the lower level end and bent
upwards at right angles, the upper part touching the higher level piece, preventing
the possibility of the angular portion of one holder from being forced into the
corresponding portion of the next below it in the magazine. The lower level end
of the holder is that which is clipped by the jaws or forceps or other equivalent of
the mechanical fog signalling apparatus.
The great advantages of higher and lower level ends of holders are (the
detonator being on the higher one) that while the detonator is in position on the
rail the jaws or other equivalent of the main apparatus are below rail level and out
of reach of harm or the wheels of the locomotive or carriages, and, furthermore,
where a number of detonators are in a magazine each one must be forced into the
same position to be in line with the jaws or forceps for engagement to be placed
the metals. There are two points of contact or bearing, therefore, in holders, the
higher level end of one holder is supported by the detonator below it, and the lower
end next the detonator of the upper holder bears on the upper level end of the
underneath holder.
on
My holder is applicable to any form of mechanical fog signalling apparatus,
whether automatic or non-automatic, or whether operated by the signal wire or
separate lever in the signal box.
In order that my. invention may be better understood and more readily carried
into effect I will proceed to describe the drawings hereunto annexed. The same
letters refer to the same parts in the several figures.

page_text: Figure 1 is a plan of the clip with the detonator in position.
Figure 2 is a side view of Figure 1.
Figure 3 is an end view of Figure 1 in the direction of the arrow.
a is the detonator, b are the lips or projections which are bent over the edge of
the detonator to hold it in position, is the upper level part of the clip, d is the
lower level, e is the bent portion at an angle of 45° to c and d. ff are the pieces
which are bent upwards obstructing the angular portion and preventing the
detonator next above from being forced into the angle formed by e with c and d.
d, the lower level, is that portion clipped by the jaws or forceps of the maîn
apparatus.
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. An improved form of detonator holder or clip for use with fog signalling
apparatus on railways in which the clip consists of an upper and lower level the
upper and lower levels being connected by the bent portion approximately at an
angle of 45° to both, substantially as described and illustrated in the drawing
annexed.
3. In detonator clips or holders employed in fog signalling apparatus on
railways, the pieces. ff preventing the angular portion of one clip from being forced
into the corresponding angular portion of the clip below it.
4. An improved form of detonator holder or clip for use in fog signalling
apparatus on railways, substantially as described and illustrated in the drawing
annexed.
Dato this 10th day of Santambor 1901
JOHN P. O'DONNELL,
70 and 71, Palace Chambers, Westminster, London, S.W.,
Agent for the said Applicant.