Ignifereous Det. assembly

[Bellifortis]

For a very, very long time I have not been able to identify this ignifereous Det. assembly. This seems to be a sub-assembly. In what item was this supposed to be used ? The overall length is 46,3mm, the Det. by itself is 19,4 X 8,85 mm, a very unusual size. The lead-in tube has an outer dia of 7,9mm and an inner dia. of 5,7 mm, so it's too strong for crimping on a safety fuse. The item is all brass, so I assume it to be pre WW 2, as all german Det.`s of WW2 vintage i know are made of aluminum. The 2 holes in the screw coupling were most probably made during disassembly, to drill out the "Krnerschlag" ( What are the identations, with which 2 screwed together items are immovably fixed, called in english ? My dictionary calls the tool these identations are made with, a "center punch". Is that right ? The dark discoloration of the det. is most probably the result of the inerting process used. The whole assembly is made of brass. The T stamped in the bottom of the det. means most probably, that it has been manufactured at Dynamit Nobel Troisdorf factory, for more than a 100 years the premium manufacturer of such items in germany. If you can not identify the item directly, may be you have an idea, what this assembly could have been used for ?

 

[Alpini]

it's a detonator of a german 1st WW 9 cm Lanz all-side impact fuze.

 

[Bellifortis]

Thank you Alpini, that's interesting. Would you be so kind as to post a drawing of the fuze. It's the first time that I read the designation "Lanz" fuze.
Regards,
Bellifortis.

 

[bdgreen]

Some photos from old internet file of Lanz projectile and fuze.

Brian

 

[Bellifortis]

Thank you Brian for these interesting photos of this unusual projectile. I would very much like to find out more. I already have a very extensive library, but WW1 I have not well covered. Do you have any hints about literature for a more deep study of this fuze and projectile.
regards,
Bellifortis.

 

[paul the grenade]

hi bellifortis. here's a link to a page all about the 9 cm lanz.
http://inert-ord.net/gerimp/lanz/index.html
cheers, paul.

 

[Bellifortis]

Thank you Paul for that informative link. Meanwhile I also found a drawing of the fuze in the 1919 belgian publication "Les Fusees Allemandes", also the Det.assembly there looks a little different to the one in the above 2 posted fotos. Another thing intrigues me : Up till a short time ago I believed that the "Allways acting fuze" with one or 2 cones, like the english "No.247", was an english invention. Only a short time ago I noticed this system in early WW1 german fuzes. Does any of you know a fuze where this "Allways" system of cones is used before the "Lanz" fuze ? May be even a patent ?
Regards,
Bellifortis.