Detonating relays

Section 1 lists those subjects from "Abel s Equation of State to "Detonating Relays which were either already described in Vols 1,... 

Detonating Relays. These are devices for obtaining short-delay blasting in conjunction with detonating fuse. They consist of two open-end delay detonators coupled together with flexible neoprene tubing. In practice, a relay is inserted in the main line of detonating fuse which is cut at any desired point and the two ends are crimped into either end of the relay. The delay provided is 15 3 millisecs Ref McAdam West water (1958), 60... 

Detonating relays Detonator assemblies, non-electric, for blasting, I.IB, 1.4B, 1.4S... 

Once initiating devices are connected to a cord or fuse they become assemblies, hence blasting cap assembly and detonator assembly. Detonating relays are assemblies of detonators connected in such a way that multiple charges are fired in parallel or sequentially as one explosive initiates another. 

Detonator Assemblies, Non-Electric for blasting Non-electric detonators assembled with and activated by such means as safety fuse, shock tube, flash tube or detonating cord. The[y] may be of instantaneous design or incorporate delay elements. Detonating relays incorporating... 

Detonators Articles consisting of a small metal or plastics tube containing explosives such as lead azide, PETN or combinations of explosives. They are designed to start a detonation train. They may be constructed to detonate instantaneously, or may contain a delay element. The term includes Detonators for Ammunition and Detonators for blasting, both Electric and Non-Electric. Detonating relays without flexible detonating cord are included. UN App. B, ICAO A2... 

Encyclopedia of Explosives Related Items Vol. 1, A to Azoxy (I960), Fedoroff et al. Vol. 2, B (Explosif) to Chloric Acid (1962), Fedoroff Sheffield Vol. 3, C (Chlorides) to Detonating Relays (1966), Fedor< Sheffield, Picatinny Arsenal, Dover, N.J. 

Relay. A component of a high-explosive train that provides the required energy to reliably initiate the next element in the train. Specifically applied to small charges that are initiated by a delay element and, in turn cause the functioning of a detonator (Ref 40a, p 120)(See slso in this Volume, Section 4, Part F (Compare with Lead)... 

Relay Detonator. See Ref 23, pp 5-30 to 5-33 and also in this Volume, Section 4,... 

FIRING PIN PERCUSSION DELAY PRIMER RELAY DETONATOR BOOSTER BURSTING charge... 

This type of detonator is designed to deliver a detonating impulse when acted upon by a heat impulse or a detonating impulse generated by a previous element. In the latter case it serves for boostering the detonating impulse. Heat impulses may result from the flash of a delay element in delay type fuzes or the flash from a primer in instantaneous type fuzes. When initiation results from the functioning of a previous detonator, the flash type detonator usually serves in the capacity of a relay where the gap over which the detonation must be transmitted is too... 

This starts the action of other elements of explosive train which consists of a Tetryl "lead", a relay detonator, and a booster charge. The stab detonator consists of a cup, which is made of A1 or A1 base alloys if LA is one of the expl ingredients, whereas Cu or Cu base alloys are used for detonators contg MF. The cup might have any one of several designs of its sensitive end closures, such as two disk-closed ends one disk-closed end one coined end one coined end one open end and one disk-closed end one open end... 

Delays, Relays, Leads and Their Uses in Fuze Detonators, Fuze Primers and Some Pyrotechnic Items a) Definition of Terms... 

DELAY PELLET ACCELERATING CAVITY RELAY DETONATOR... 

The term "relay" is defined at the beginning of this Section. To this definition may be added the following description of a relay detonator, which is taken from Ref 23, pp 5-30 to 5-33 and slightly reworded and abbreviated ... 

In Fig 5-27 taken from Ref 23, p 5-31 (See our Fig 1-64), is shown a relay detonator which has given satisfactory results in 7 and 7.7-sec vented delay elements in the temperature range of -65 °F to 160 °F. The lightly pressed BkPdr chge at the terminal end of the vented delay column is provided to produce sufficient heat and pressure to assure reliable initiation of the LA chge. 

In case of impact the SQ firing pin (D) and detonator (E) function but the effect is prevented from being transmitted to booster (U). On the other hand, when the firing pin (N) strikes the primer (P), the shock is transmitted thru the delay (Q) and relay (T) to booster (U) and then to the main chge of projectile... 

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