Birdseye
BOCN Contributor
Hi all.
I recently came across the "Ring Retaining Fuse" used in my favorite shells, the Hotchkiss 1.65". I found a line drawing (first figure) and, frankly, I could not begin to understand how the damn thing worked.
Well, I finally got a sucker apart and can now share this technology with you.
The second picture shows a disassembled fuse. From right to left the pieces are:
1) Fulminate cup
2) safety disk
3) Retaining collar
4) Fireing pin tube gizmo
5) Firing pin
6) The infamous "Ring"
The way it works is this:
In the "Safe" mode, the ring is slipped over the fireing pin and rests on a shoulder. See the third picture. When the ring is in the safe position it abuts a ridge in the Firing pin tube gizmo which prevents it from contacting the Fulminate cup. Now (here is the cool part) the ring could be forced back to the .. errr unsafe position only when the projectile is accelerated upon fireing. When the ring is forced to the rear position it allows for ~1/4" of travel: just enough to contact the fulminate (last picture).
Clear?
I recently came across the "Ring Retaining Fuse" used in my favorite shells, the Hotchkiss 1.65". I found a line drawing (first figure) and, frankly, I could not begin to understand how the damn thing worked.
Well, I finally got a sucker apart and can now share this technology with you.
The second picture shows a disassembled fuse. From right to left the pieces are:
1) Fulminate cup
2) safety disk
3) Retaining collar
4) Fireing pin tube gizmo
5) Firing pin
6) The infamous "Ring"
The way it works is this:
In the "Safe" mode, the ring is slipped over the fireing pin and rests on a shoulder. See the third picture. When the ring is in the safe position it abuts a ridge in the Firing pin tube gizmo which prevents it from contacting the Fulminate cup. Now (here is the cool part) the ring could be forced back to the .. errr unsafe position only when the projectile is accelerated upon fireing. When the ring is forced to the rear position it allows for ~1/4" of travel: just enough to contact the fulminate (last picture).
Clear?
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