Time Delay Devices
------------------
There are three different types of time-delay devices:
1) Metal strip under tension till it breaks.
2) Chemical action that will, after a period of time, produce
enough heat to detonate the explosive charge.
3) An alarm clock set for a certain time, so that when it rings
it will complete and electrical circuit, thus detonating an
electrical blasting cap.
The first method, metal under tension until breakage, I will
not discuss, since it is extremely hazardous and unreliable. You
can have little or no control over timing, and such devices are
notorious for backfiring.
The chemical-action time-delay methods have proven to be pretty
reliable. Most of this action incorporates the amount time taken
by certain solution of acid to eat its way through another
substance. The time length can be determined by the
concentration of the acid and by the substance to be eaten
through.
Nipple Time Bomb
----------------
An example of this type of chemical action is the Nipple Time
Bomb, which is very effective. One must obtain a short section
of steel pipe and cap each end accordingly. Place inside the
steel pipe a stick of dynamite, and drill a quarter-inch hole at
on end of the cap. Now, into this hole you must place a small
amount of potassium chlorate and gunpowder. Now, seperatly from
the pipe, take a small glass vial and fill it with a concentrated
sulfuric acid solution, then stop up the end with a paper or cork
stopper. To arm the bomb, place the vial of acid upside down in
the hole at the top of the pipe. Now, when the acid has eaten
its way through the stopper, it will come in contact with the
potassium chlorate and gunpowder. The mixture of these chemicals
will cause a minor explosion, but it will be large enough to
produce the heat necessary to detonate the dynamite. The
detonation time is usually between three and six hours. If a
solution of sulfuric acid and glycerin is used, rather than just
a pure sulfuric acid, the time delay will be up to five or six
days.
Here is a diagram:
$ = Vial with Sulfuric Acid Mixture
% = Potassium Chlorate
# = Gunpowder
+--+$+--+
! !$! !
C ! !$! !
A ==> ! !%! !
P ! !#! !
! +-+ !
+-+---+-+
! !
! D !
! Y !
P ! N !
I ==> ! A !
P ! M !
E ! I !
! T !
! E !
! !
+-+---+-+
C ! !
A ==> ! !
P ! !
! !
! !
+-------+
Vial of Sulfuric Acid:
+---+
A ! !
I ==> ! !
R ! !
!%%%!
SULFURIC !%%%!
==> !%%%!
ACID !%%%!
!%%%!
!%_%!
STOPPER ==> !/ \!
+---+
Place the vial upside down in the top of the bomb as shown.
Incendiary Time Bomb
--------------------
This next one is an incendiary time bomb. This is very
similiar to the Nipple Time Bomb, in that it relies on the same
chemical action, but without the dynamite. The procedure is very
simple. A cardboard box or iron tube is filled with a mixture of
three-quarters potassium chlorate and one-quarter sugar, and then
sealed. At one end a hole is made. Into that hole is placed an
inverted vial of sulfuric acid, with a paper or cork stopper, it
will come into contact with the potassium chlorate-sugar mixture.
This will result in a very hot, powerful fire.
Illustration:
% = Vial of Sulfuric Mixture as in the
above bomb
$ = Cork or Paper Stopper
# = Mixture of Potassium Cholrate and
Sugar
+---+ +---+
! !%! !
! !%! !
! !%! !
! !%! !
! !$! !
! +-+ !
!#########!
!#########!
!#########!
!#########!
!#########!
!#########!
+---------+
Magnifying-Glass Bomb
---------------------
The Magnigying-Glass Bomb is effective, but it has many
disadvantages. The procedure is very simple. Take a tin can and
fill three-quarters of it with highly coompressed gunpowder. Now
attach to the top of the can a small magnifying glass, so that
the sun's light, when magnifyed through the glass, will cause the
heat necessary to detonate the charge. This works very well, as
long as it doesn't rain.
Illustration:
Magnifying Glass
!
+-----+
+------! !------+
! +-----+ !
! !
! !
! !
!%%%%%%%%%%%%%%%%%%%!
!%%%%%%%%%%%%%%%%%%%!
!%%%%%%%%%%%%%%%%%%%!
!%%%%%GUNPOWDER%%%%%!
!%%%%%%%%%%%%%%%%%%%!
!%%%%%%%%%%%%%%%%%%%!
!%%%%%%%%%%%%%%%%%%%!
+-------------------+
Alarm-Clock Time Bomb
---------------------
The alarm-clock detonation method is the most accurate device,
in that a person can the the exact time he wishes the bomb to
explode. It is connected in the same fashion as the other
eletrical-circuit booby traps. Wires are connected to the hammer
of the bell and to the bell itself, via the blasting cap, to a
dry cell. The clock should be set to go off before the booby
trap is built. When the alarm goes off, the hammer and bell
connect completing the electrical circuit and detonating the
explosive.
Illustration:
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% +---++---+ % DYNAMITE %
% ! +!!+ ! %%%%%%%%%%%%%%%%
% ! !DC! ! % DYNAMITE %
% ! !re! ! %%%%%%%%%%%%%%%%
% ! !yl! ! % DYNAMITE %
% ! ! l! ! %%%%%%%%%%%%%%%%
% ! +--+ +-- Blasting Cap %
%%!%%%%%%%%!%%%%%%%%%%%%%%%%%
% ! ! % DYNAMITE %
% +-+----+-+ %%%%%%%%%%%%%%%%
% !oooo! % DYNAMITE %
% !oooo! %%%%%%%%%%%%%%%%
% !oooo! % DYNAMITE %
% +----+ %%%%%%%%%%%%%%%%
% Clock % DYNAMITE %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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