British Electric Short Delay Detonator

Ordinary delay detonators in Gt Britain are issued in series numbered from 0 to 10, the interval betw any two consecutive delay numbers being 0.5 sec. Thus the No 0 fires instantaneously, No 1 fires 0.5 sec later, etc ( Ref 36, p 71) 

Firing characteristics of Brit electrical detonators are given in Ref 51, p 121 

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. 

The description includes two types of electric delay caps of DuPont Co and a nonelectric delay blasting cap (pB50-L). Composi-tiond of various delay elements are given on p B52 

Fordham (Ref 51, p 127) states that a common mixture for US delay elements consists of Ba peroxide 85 Se 15% and that for the manuf of millisecond delay detonators, faster burning compns are required such as Si 30-50 red lead (or lead dioxide) 50-70%. Manuf of delay compns is described on pp 128-29, assembly on p 129 and design on pp 129 30 of Ref 51. Ger delay compositions (Verzo-gerungsverbindungen) and delay elements(Verzo-gerungskorper) are described In Ref 35, pp Ger 33 Ger 34 

---

An other type of British nonmilitary electric detonator, called short type delay detonator" is described in Ref 36, pp 72-3 and is shown here in Fig 11. This detonator con-... 

---