Home > Timers—Mechanical, Electrical, Electronic and Chemical

Timers—Mechanical, Electrical, Electronic and Chemical

Improvised Explosive Devices, Radiological Dispersal Devices and Chemical Dispersion Weapons usually contain some type of time delay device. These are grouped together under the common name, “timers”—no matter how they function. Some are combination types, operating on more than one principle.

We incorporate timers in many of our inert IED training aids. Some are mechanical as in windup alarm clocks and kitchen timers. Others are digital countdown types with display screens. Some use electronic circuitry that is pre-programmed to several specific set delay times. Others are mechanical, and some are mechanical/chemical combinations.

Timers may be used to initiate (detonate) an IED at a specific time. They may also be used by the bomber for delayed arming. This allows time for setting up and wiring together all of the components, and transporting the IED to its target location.

Delay arming timers allow for boobytrap devices to be set up, with no hazard to the bomb maker until they have timed down to zero. Delay arming timers are an “open switch” for the other component and initiating devices in the IED circuitry while they are quietly counting backwards to zero.

We make some timers that function based on a lit cigarette, a candle, a mousetrap and solder, the dripping of water, beans and other seeds germinating, etc. Some of these devices have been used for almost 100 years in different parts of the world, to provide time delayed arming, or detonation. They have an equal place in setting off delayed arson devices.
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Timers—Mechanical, Electrical, Electronic and Chemical

CUT AWAY SIMULATED BLACK POWDER FILLER
Order Sku: ITA-10
Cut away simulated black powder filler. Wristwatch initiated.

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CLOTHESPIN/CIGARETTE DELAY
Order Sku: ITA-100
Clothespin/cigarette delay. Clothespin is modified into electrical switch, which closes as twine burns through from cigarette.

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MOUSETRAP/SOLDER DELAY
Order Sku: ITA-101
Mousetrap/solder delay. Same principle as ITA-98. However, this device uses a powerful torsion spring that can close a switch as well as fire a percussion-initiated bomb.

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MOUSETRAP/CIGARETTE DELAY
Order Sku: ITA-101A
Mousetrap-cigarette delay. Operates on burn-through principle. Same principle as ITA-100.

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ELECTRONIC INTEGRATED CIRCUIT TIMING CHIP
Order Sku: ITA-104
Electronic integrated circuit timing chip (typically, 555 timer chip). This device uses a specially-engineered printed circuit board built to our specifications, and factory programmed for multiple time delay settings.

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INERT ARSON IED WITH ELECTRO-CHEMICAL DELAY AND HYPERGOLIC REACTION DELAY
Order Sku: ITA-106
Electro-Chemical delay IED/Arson device.
This training aid is used to demonstrate two principles: corrosion time delay, by means of chemical and/or electrical action; and hypergolic reactions using combinations of reactive chemicals that ignite or detonate when combined, following the delay process.
Shows how arsonists/bombers may set up silent delay combinations.

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ALTIMETER SWITCH INITIATED IED
Order Sku: ITA-115
Altimeter switch initiated IED. Built around functioning aircraft altimeter on 2’ X 2’ display board, with stand. Uses small electric (120 volt) vacuum pump to exhaust air from altimeter; simulating a rise in altitude, as if installed in an aircraft which is ascending from ground level. Where available, we also attach to the board a set of working parts from the inside of an altimeter to illustrate their appearance and demonstrate their functioning.

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Arson IED using Propane Tank with Kitchen Timer Delay
Order Sku: ITA-117
Built around plastic gasoline container, propane tank, oxygen tank kitchen timer (see ITA-148 & ITA-150).

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ARSON IED DEMONSTRATOR USING CONDOM/ACID DECAY
Order Sku: ITA-118
Condom-initiated IED device, incorporates glass tube, acid, condom & sugar chlorate mixture.
Demonstrator only; non-functional

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INERT ARSON IED USING TENNIS BALL PARTITION INITIATION
Order Sku: ITA-119
Table Tennis Ball device is non functional, suitable for display and instruction only. Demonstrator.

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INERT SANDPAPER FLAP INITIATED IED
Order Sku: ITA-124
Sandpaper flap. Built into rigid box fitted with sandpaper, matches and plastic charge. Matches burst into flames as lid is opened and detonation occurs soon after.

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CLOCK FRICTION SWITCH INITIATED
Order Sku: ITA-125
Clock friction switch initiated. Device uses modified windup alarm clock that will initiate device when clock alarm is activated and wind up keys turn.

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