Improvements in Percussion Fuses for Shells.
Year: 1888

page_text: als of Application, 3rd Oct., 1858
Complete Specification Left, 6th Aug., 1889-Accepted, 21st Sept.. 1889
PROVISIONAL SPECIFICATION.
Improvements in Percussion Fuses for Shells.
I CARL JOHAN FREDRIK MAlcolm LillieHÖÖK of 78 Crofton Road Camberwell in
the County of Surrey Draughtsman do hereby declare the nature of this Invention to
be as follows:-
My Invention has for its object to provide a percussion fuse for shells which is of
less cost and is more reliable, safer and better under control than are such. fuses as
ordinarily made.
According to my Invention I provide a circular chamber which is furnished with a
screw or other means of attaching it to the shell. The said chamber has fixed to its
end nearest the shell a disc or cover in which is contained the fulminate cap or
detonater. In the said chamber is contained a weight or hammer which carries the
striker for exploding the detonater or cap. The said weight or hammer fits in the said
chamber so that it can revolve therein with any amount of friction which assisted by
springs if desired 1 can regulate as desired. There is a space between the weight or
hammer and the disc or cover sufficient to enable the weight or hammer to move
longitudinally in the chamber for exploding the detonater or cap but normally the
said weight or hammer is in such a position. in every direction and serve to regulate
the movement of the said weight or hammer when it is acted upon by the forces
developed when the shell is fired at which time the rotary motion imparted to the
shell and the said chamber attached to it combined with the inertia of the weight or
haminer causes the relative positions of the weight or hammer and the chamber to be
changed axially so that a recess in the weight or hammer comes opposite the stop or
stops which previously prevented the weight or hammer moving longitudinally and
when this position of the weight or haminer has been attained it will be held in that
position by a stop or stops. When the shell strikes an object the weight or hammer
moves forward and explodes the detonater or cap. The respective positions of the
weight or hammer in which it, before firing, cannot move longitudinally and in which
it, after firing, can have such movement may be maintained by a spring or its equivalent
which enters recesses in the walls of the chamber in positions suitable for retaining the
weight or hammer in the said two positions.
Duted this 3rd day of Datalos 1080
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Percussion Fuses for Shells.
I CARL JOHAN FREDRIK MALCOLM LILLIEHÖÖK now of 26 Willow Street Brooklyn
in the United States of America late of 78 Crofton Road Camberwell in the County of
Surrey Draughtsman 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 :--
My Invention has for its object to provide a percussion fuse for shells which is of
less cost and is more reliable safer and better under control than are such fuses as are
ordinarily made.
I will describe my Invention with reference to the accompanying drawings-
Figure 1 being a plan and Figure 2 a vertical section of a fuse made according to my
Invention with the parts in their normal or safe position whilst Figures 3 and 4 are
corresponding views shewing the parts in position to cause the fuse to be ignited on
the shell striking an object. I do not limit myself to the precise details which are
illustrated in the accompanying drawings and which I shall now describe.

page_text: According to my Invention I provide a circular chamber A. which is furnished with
a screw or other means of attaching it to the shell. The said chamber has fixed to its
end nearest the shell a disc or cover b. in which is contained the fulminate cap or
detonator b. In the said chamber A. is contained a weight or hammer C which
carries the striker c for exploding the detonator or cap. The said weight or hammer C
fits in the said chamber A. so that it can revolve therein with any desired amount of
friction which (assisted by springs if desired) I can regulate as required. There is a
space at d between the weight or hammer and the disc or cover b sufficient to enable
the weight or hammer C to move longitudinally in the chamber A. for exploding the
detonator or cap-but normally the said weight or hammer is in such a position that
it is by a stop or stops (such as the bar e) prevented from taking such longitudinal
movement. This stop e or these stops keeps or keep the weight or hammer C in
position and serve to regulate the movement of the said weight or hammer C when it
is acted upon by the forces developed when the shell is fired at which time the rotary
motion imparted to the shell and the said chamber A. attached to it combined with the
inertia of the weight or hammer C causes the relative positions of the weight or
hammer C and the chamber A. to be changed axially so that a recess c² in the weight
or hammer comes opposite the stop or stops e which previously prevented the
weight or hammer from moving longitudinally and when this position of the weight
or hammer C has been attained it will be held in that position by a stop or stops as
at 3. When the shell to which the fuse is affixed strikes an object the weight or
hammer moves forward and the striker c explodes the detonator or cap 2. The
respective positions of the weight or hammer Cin which it, before firing cannot move
longitudinally and in which it, after firing, can have such movement may be maintained
or ensured by a spring f(or its equivalent) attached to the weight which spring or
the like enters recesses g in the walls of the chamber A. in positions suitable for
retaining the weight or hammer C in the said two positions.
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 concussion fuses for shells a recessed weight or hammer (C) contained in an
outer casing (A.) and a stop or bar so situated that normally the longitudinal move-
ment of the weight or hammer is prevented by the stop or bar but by the rotary
motion of the shell due to firing the said weight or haminer (and casing A. take up
a relative position in which the said weight or hammer can move longitudinally to
explode the shell when it strikes an object substantially as herein before described.
2. The general arrangement and combination of parts constituting a percussion fuse
substantially as herein before described and illustrated in the accompanying drawings.
Dated this 6th day of August 1889