Mechanical Action Fuzing (switches)

Question 1

Definition of mechanical fuse

Answer 1

Any mechanical mechanism that is employed in a hazardous device and requires physical action or force to take place in order for the mechanism to function.

Question 2

Definition of mechanism

Answer 2

The means by which an affect is produced or accomplished or the mechanical aspect in other words. Typed by function

Question 3

Organic safety

Answer 3

Built in safety

Question 4

What is a positive safety

Answer 4

Put into device afterwards

Question 5

What is NC and NO

Answer 5

NC = Normally Closed

NO= Normally Open

Question 6

Switch contacts on bottom can have 3 positions

Answer 6

Normally Open

Normally Closed

Combination of both

Question 7

What does a safe arm do?

Answer 7

A safe arm is put in place so that a device can be safely handled until the device is ready to be fired.

Question 8

Arming Switch

Answer 8

Functions the device

Question 9

FUZE VS. FUSE

Answer 9

FUZE: Ignition source inside an explosive device.

FUSE: A wire, bar, or strip of fusible metal inserted for safety in an electric circuit.

Question 10

What are the normal states of rest for the switch with no outside influence.

Answer 10

NC OR NO

Question 11

TYPES OF COMMERCIAL SWITCHES

Answer 11

Toggle Switch
Slide Switch
Relay Switch
Vapor Switch
Knife Switch
Micro Switch
Mercury Switch
Vibratory Switch
Magnetic Switch
Push Button Switch

Question 12

Toggle Switch and Slide Switch

Answer 12

Moves the lever in order to open or close. In the open position the circuit is not complete. When closed it completes the circuit.

Question 13

Relay Switch

Answer 13

Electromagnet to create a magnetic field that closes a circuit, turning a larger electrical current on or off

Question 14

Vapor Switch

Answer 14

Environmentally safe version of the mercury switch

Question 15

Knife Switch

Answer 15

Think about Frankenstein pulling power. You pull to complete circuit

Question 16

Micro Switch

Answer 16

Can be used as pressure or as pressure release.

Question 17

Mercury Switch

Answer 17

Best switch on market. Uses mercury that moves to one side or the other to complete circuit.

Question 18

Vibratory Switch

Answer 18

Motion activated. VERY SENSITIVE

Question 19

Magnetic Switch

Answer 19

The movement of the magnet can open or close the circuit

Question 20

Push Button Switch

Answer 20

Pushing on it opens or closes it (Keyboard Key)

Question 21

Improvised Mechanical Switch

Answer 21

Clothes Pin
Loop Switch
Pressure Switch
Foil Switch
Tilt Switch
Tilt Switch (2)
Knife Switch
Time Device
Mouse Trap

Question 22

Clothes Pin

Answer 22

You can put metal on the legs and a non-conductive material between it and once it’s pulled out it closes the circuit.

Question 23

Loop Switch

Answer 23

The loops are around the wire and if they are pulled (opening) box it will complete the circuit

Question 24

Pressure Switch

Answer 24

Stepping on it can make it go off or releasing the pressure.

Question 25

Foil Switch

Answer 25

The foil is separated by a non conductive material between the two sheets of foil. Once removed the foil touches closing circuit. On the X-Ray look for wires that are going to nothing and are suspended in air.

Question 26

Tilt Switch

Answer 26

The motion closes the circuit

Question 27

Knife Switch

Answer 27

Uses trip wire to pull knife to close the circuit.

Question 28

Time Device

Answer 28

Can be in various forms: Clock

Question 29

Mouse traps

Answer 29

Can be used in various devices

Question 30

Trip Wires

Answer 30

A wire attached to 2 different points a fixed location and then to the switch. It can either open or close the switch to complete the circuit. When you encounter them you have 2 options if in a tactical environment you should mark it and and continue. If in search you should ID it and figure out how it works.

Question 31

Switches by function

Answer 31

Pressure Pressure releases Pull Tension release Anti-Disturbance Barometric Hydrostatic Thermal Time Delay

Question 32

Pressure

Answer 32

Force applied directly to a moveable plunger or flexible material

Question 33

Pressure Release

Answer 33

Apply the pressure to the device and functions once pressure is removed. Victim Activated

Question 34

Pull

Answer 34

The force exerted against a wire, cord, or trip wire to complete firing system. Can do the following: Remove pins, close electric circuits, pull abrasive material through a match compound. Typically a trip wire

Question 35

Tension Release

Answer 35

Incorporates taut trip wires. Occurs when a line under tension is cut or broken

Question 36

Anti Disturbance

Answer 36

Used to sense any movement to function firing system THE MOST HAZARDOUS

Question 37

Anti Disturbance

Answer 37

Used to sense any movement to function firing system THE MOST HAZARDOUS

Question 38

Barometric

Answer 38

Detects the change in air pressure.

Question 39

Hydrostatic

Answer 39

Balloon that will expand or contract on depth functioning the device with increase pressure.

Question 40

Thermal Bimetal Switch

Answer 40

Operates on change in temp

Question 41

Time Delay Switch

Answer 41

Time limit can be: Mechanical Chemical Material fatigue

Question 42

Mechanical delay

Answer 42

Alarm on clocks must remove coating off of clock to work.

Question 43

Chemical time delay

Answer 43

Example M-1 time Pencil

Question 44

Material Fatigue

Answer 44

Any degradable material can be used to construct a time delay