Arming device

Mechanical Fuze. Any fuze which depends for its arming and functioning on events primarily of a mechanical nature. Fuzes may consist of a combination of mechanical and electronic features. Proximity fuzes may contain a mechanical delayed arming device mechanical fuzes may be functioned by electrical energy from a piezoelectric element. The classification is dependent upon which features are predominant... 

Safing and arming devices and fuzes except proximity and those assigned to Frankford Arsenal... 

Picatinny Arsenal s contributions to the recent military effort in Southeast Asia were substantial. The timely and quantitative production of bombs and other standard items of ammunition was accomplished until industry could regear to resume that role. The Arsenal also responded to the need for the development of new and improved munitions during this period, in chiding more effective fuzes and safing and arming devices... 

Some mechanical fuzes are functioned by electrical energy from a piezoelectric element. Some proximity fuzes contain a mechanical delayed arming device... 

Mark 5 Flares, Types 1 and 2 consisted of a cylindrical buoyancy chamber which contd two candles. To these were attached a fuze, a static cord and a pull igniter. The static cord functioned either the arming device of the fuze or the pull igniter. When the device was released (from a container) over the water it went under the surface and then came up. It floated with the head of the flare just clear of the water. When the 1st candle was about % burned out, a piece of safety fuse running to the 2nd candle was ignited and, after a short delay, die 2nd candle started to bum. Each candle burned for about 2% min... 

Anon, EngrgDesHndbk, Fuzes, Proximity, Electrical, Part Five (U) , DARCOM-P-706-215(0 (no date) [Discusses fuze testing and various types of power sources used in the design of safing and arming devices] 6) R.B. Baldwin, The Deadly Fuze—The Secret Weapon of World War II , Presidio Press, San Rafael,... 

The sequence of operations is as follows Azimuth and range to the target are determined. Hie primary fuze is set and the correct amount of propint charge is loaded into the gun to deliver the round to the area above the target. Launch setback activates the safe and arm device. As the projectile continues on its ballistic path, the pre-set primary fuze initiates when the round passes into the desired delivery area. Primary fuze initiation causes an expl pusher charge to eject the three submunitions from the aft end of the round, which continues on its trajectory. After ejection, a de-spin mechanism slows the speed to allow for parachute deployment. Once de-spin occurs, the vortex ring parachute is deployed, initiating... 

All of the timing systems and components discussed are of ordnance interest. Many of the timers are components of ammo, fuzing or control devices. Particularly in fuzes, where delays are crucial to safe and effective performance, timers are almost always present. Timers for most safing and arming devices, being mechanical, are also covered... 

Motion sensitivity too high Power surge Incorrect code No code entered Premature notification k Motion sensor hindered Power failure Not armed (human failure) Not armed (device faiiurej Notification failure ... 

Additional clinical applications in the body that can benefit from C-arm CT are drainages and punctures. When performing percutaneous biliary drainage procedures, Froehlich et al. (2000), for example, found that C-arm CT resulted in decreased procedure and fluoroscopy times. C-arm CT can also be beneficial for complicated transjugular intrahepatic portosystemic shunt cases (SzE et al. 2006). Binkert et al. (2006) described another successful application for C-arm devices providing both 2D and 3D imaging. They used the 3D cross-sectional information for needle placement and 2D fluoroscopy to perform embolization of translum-bar type II endoleaks. 

The technical progress in C-arm CT is going to continue. In fact, the recently introduced Artis zeego system (Siemens AG, Healthcare Sector, Forchheim, Germany) already provides a gfimpse into the future of advanced C-arm devices. Based on a new multi-axis platform... 

Figure 18.19b shows a decoy pellet with longitudinal grooves (1) and a base hole (2) to contain the safe and arm device. 

See Armed, Arming Device, and Safing for additional related information. 

An ESAD is a safe and arm device that operates by electronic methods, as opposed to mechanical methods. 

The purpose of the S A is to reliably initiate an explosive device, but only after all safety criteria have been met. Typically, an S A physically separates an explosive from the initiator. When the S A is in the safe position an inadvertent initiation signal cannot reach the explosive due to the physical barrier. When the S A is in the arm position an initiation signal will reach and detonate the explosives at this point the initiation signal should be intentional and not inadvertent. The S A device is also sometimes referred to as a safe arm device. 

Safing is the act of disarming an armed device moving the device from arm to safe. 

The system is safety-critical or high consequence and requires significant analysis coverage to provide safety assurance (e.g., safe and arm devices, fuzes, guidance systems, launch commands, and fire control system). 

Ignition of electro-explosive devices (EEDs) and electronic safe and arm devices (ESADs)... 

---