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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