Electric Delay Detonator

70/30 LEAD PEROXIDE/B0R0N MILLE0 NORMAL LEAD STYPHNATE LEAD MONONiTRORESORCINATE 

The T39 will function with 10 microseconds from the discharge of a 0.001-fif condenser charged at 1000 volts. It was pianued to use T39 in the firing device of railroad type torpedo (Ref 42b, p 654) 

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A type of British "electric delay detonator with an intermediate charge" is described in Ref 36, p 70 and is shown here as Fig 10. 

Fig 10 BRITISH ELECTRIC DELAY DETONATOR WITH AN INTERMEDIATE CHARGE... 

Devices similar to above electric delay detonators are described in Ref 44, p B188-L, under BLASTING CAPS and in Ref 48, pp D49-R D50-L, under Delay Blasting Cap. 

There are a few examples of firing time vs electric current listed in Vol 5(Ref 4), Table E5, p E28 for Electric Delay Detonators XM60, T65 T68 and in Table E9, p 57 for Electric Fuze Primers XM85, 87, 88 89... 

In the pamphlet of S- Odiemo, " Information Pertaining to Fuzes , Vol IV, published in 1964 by Picatitmy Arsenal are listed in Table of p V A (Our Table E5) three Electric Delay Detonators. The T65 is also descrihed in Vol 4 of Encycl... 

Electric Fuze Detonators, Delay. See under Electric Delay Detonators (Military) (US)... 

Bettermann s Electric Delay Detonator, patented in 1898, may be considered as the precursor of modern delay detonators. A detailed description with schematic drawing is given in Daniel(1902),... 

A specially dangerous condition can arise when several shots are fired in one round by means of electric delay detonators. A preceding shot may then break the coal of another hole or even cut off the whole burden of the charge in question so that it is partly or completely exposed. This condition is simulated in the angle-mortar test. 

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