Stab Fuze Primers

Fig 1-33 BUTTON-TYPE ELECTRIC DETONATOR T62 Fig 1-34 TYPICAL STAB FUZE PRIMER 

Until about I960 it was considered that the minimum diameter for propagation of Tetryl, RDX and PETN in light confinement was 0.125, 0.100 and 0.050-inch respectively. 

A comprehensive description of current electric detonators is given by Freiwald (Addnl Ref Ad 160) 

There are two types of fuze primers unobturated and obturated . Obturated primers contain an anvil, while unobturated do not contain it. Following are examples of unobturated fuze primers a) Instantaneous Stab Fuze Primers 

These primers consist of a thin metallic cup filled with a very sensitive priming mix- 

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Priming charges are the same as listed under Stab Fuze Primer, while Tetryl, PETN RDX are used as the base charge... 

Stab Initiation. See under Stab Detonators in Vol 8, P381-R toP385 Instantaneous Stab Fuze Detonators in Vol 4, D844-L to D846-L and Instantaneous Stab Fuze Primers in Vol 4, D850-L to D852-L... 

These primers can be used not only in small arms but also in some pyrotechnic devices and fuzes. All simple primers are small in size, 0.21 to 0.31 inch in diam and 0.12 to 0.23 inches long for rifle ammunition and slightly Smaller for carbines. They contain only one small charge of primary expl or a mixture which must have sufficient sensitivity to be initiated either by the crushing or stab action of a firing pin... 

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