Delayed mechanisms

The diazonium salt solution decomposes on standing and hence must be mixed with the Cuprous chloride solution without delay. Mechanical stirring is an advantage. 

Explosives may be detonated electrically or nonelectrically. A nonelectric firing system will consist of a blasting cap, a length of time (safety) fuse or a firing device attached to the cap, and a means of activating the system match, fuse lighter, delay mechanism, or trip wire. The electric system requires an electric cap which has two wires attached, perhaps additional wire, and a battery or batteries to provide the current which activates the cap. 

When the fuzed bomb is dropped, the arming wire is retained in the bomb rack in order to free the arming vane assembly, thus causing it to rotate in the airstream. After traveling thru the air at a predetermined distance, the arming of delay mechanism is completed and further rotation unscrews the arming mechanism from the fuze... 

B.V. Frank J. Fruchtman, "A Study of Hydraulic and Pneumatic Arming Delay Mechanisms for Fuze, Rocket PD, T2019 , PATR 2073 (Oct 1954)... 

Bomb arming-delay mechanism 4 D1021 Bomb armin-vane assemblies 4 D1020 Bomb arming-wire assemblies 4 D1019 Bomb auxiliary boosters 4 D1012 Bomb blast 2 B222... 

S.C. Althorpe, F. Fernandez-Alonso, B.D. Bean, J.D. Ayers, A.E. Pomerantz, R.N. Zare, E. Wrede, Observation and interpretation of a time-delayed mechanism in the hydrogen exchange reaction, Nature 416 (2002) 6876. 

An interesting case is that of a delay mechanism inserted in a closed loop process with negative feedback. The typical process is the hemopoietic process that incorporates some control elements that regulate homeostatically the rates of release of marrow cells to proliferation, maturation, and to the blood. 

Reliable delay mechanisms are often needed, but they are not immediately obvious unless one is conditioned to think about them. Some make use of components that one would never associate with explosives triggers, such as dried beans, coffee cans, and wine bc-ttle corks. Figure 12 provides some bask concepts to think about. 

There is finally the possibility of decay-like leakages between the particle-antiparticle spaces, and further that there could be an overall escape out of the presently defined spaces. If so associated Jordan blocks naturally appearing would decelerate this decay via the polynomial delay mechanism described earlier [7-10] with implications to subject matters like problems related to size of the cosmological constant. Also, the account given here should consider a more general decomposition of pz into curvilinear coordinates (cf. Eq. (30)) in order to yield a more appropriate analysis (see e.g. [22] and references therein). 

The above encouraging results led to numerous in vivo investigations. We had already reported that HU-211 blocked NMDA-induced tremor, convulsions and death in mice [188], As numerous effects of brain trauma, ischaemia and bacterial infections in the CNS are associated with delayed mechanisms of damage, mediated by glutamate, the action of HU-211 on such conditions was investigated. In a series of papers, Shohami and collaborators reported that some effects of closed head injuries in rats could be significantly improved by HU-211 administration [193-196]. Thus HU-211,... 

Part of an explosive train which initiates the - detonation of high explosives, especially of insensitive ones. It may itself be triggert by a seperate -> primer of primary explosives or an integrated primer. Detonators are classified by the method of initiation percussion, stab, electrical impulse, or flash. Laser initiation is also used. Depending on the application detornators can include a delay mechanism. Explosive charge placed in certain equipment and set to destroy the equipment under certain conditions (- Initiator). 

In the spectral area with low Si/Al ratio, besides a strong peak for the species of Al(OH), several broadened, weak peaks in the range 72 80ppm could be found in the 27A1-NMR spectra, which is a typical feature of 5-coordinated intermediates. This structure is unstable in solution, but very stable in the solid phase. The aluminate compounds containing 5-coordinated Al species can be found in nature. One example is andalusite. To interpret the polymerization reaction that occurred in aluminosilicate solution, 5-coordinated aluminate was assumed to be existed. Based on the assumption of the presence of 5-coordinated aluminate, Dent Glasser and colleagues proposed another mechanism (described below) for the polymerization of silicate and aluminate ions in the solution,[41] which was named the 5-coordinated intermediate mechanism or base-delayed mechanism. The reactions will follow the steps described in Equation (5.7) ... 

A flow or time delay mechanism shall be provided to permit a two minute tube warm-up period before water flows from the unit. 

Carefully Ell the contaiz r in the delay mechanism with concentrated eulfuiic acid. This can be accomplkhed easily with a small glass funnel. A medicine dropper is used when the delay mechanism container k small. 

The most important use for water as an initiator Is in conjunction with delay niecha-niams. Since only a few igniter mixtures are initiated by water and it cmnot be used at freesing temperatures, its use is limited. When tactics BO dictate, water can be reliably used with the following delay mechanisms Gelatin Ci ule (0402), Overflow (0407), Tipping Deli —Filled Tube (0408), Balancing Stick (0410), and Stretched Rubber Band (0411). 

Use iffiih delay mechanisms. Construction of specific delay mechanisms is presented iu chapter fi. Within the delay mechanism, there is a container filled with water. The water dissolves the container or is spilled from the container and comes iu contact with igniter mixture, initiating the fire train. 

Carefully pour or spoon the mixture, in a single pile, on the incendiary. Prepare the mixture for ignition with Fuse Cord (0101) or Improvised String Fuse (0102) in the normsl msnner. The fuse cord should terminate near the center of the igniter mixture. Concentrated Sulfuric Acid (0103) can be used as an initiator, but is generally less convenient. Ignition takes place almost immediately on contact with the acid. Acid is recommended for use with specific delay mechanisms found in chiq>ter 5. 

This inceadtary can be directly initiated by a match flame. However, if delay is required, the incendiary can be reliably initiated by a delay system consisting of any igniter listed in chapter 3 coupled with a delay mechanisms found in chapter 5. 

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