The German proximity fuse.

M. J. Powell wrote:
In message
,
Geoffrey
Sinclair writes

snip

Method 3: making the shell body part of a resonant circuit and
detecting frequency changes.

Should be fun lugging the fused shells around metal guns.

IIRC the fuse was inactive until fired. The shock of firing broke a
glass cell containing the battery acid, the battery then produced the

required voltage.

The initial fuses that entered service used a 'normal' battery. It
worked quite well however the batteries would degrade in only a few
months hence the above batteries were developed. Nose mounted wind
turbine driven generators were also used in experimental shells but
were rejected, probably for cost reasons.

The German electrostatic influence fuse used a battery. I don't know
what battery technology they used.



Mike
--
M.J.Powell