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Magnetophone. A magnetophone ("Klotz") is the detecting device for
the subsonic component of the AT units. This device is sometimes known as a
"doppelschwinger" or "double oscillator" by the Germans. A sectional drawing
of the magnetophone appears in figures 215,
217. The device is suspended from a supporting arm
which is threaded into the mine-case tail dorr on the axis of the mine. This
supporting arm is fitted with a guard cylinder to prevent excessive motion
on impact. The magnetophone is connected to the supporting arm by a type of
bearing in such a way that it is free to rotate in a plane per-pendicular to
the axis of the mine. To prevent damage on laying, the magnetophone is held
in a fixed position by an arm mounted on the tail door, and the magentophone
is re-leased by the blowing of a fuse when the mine becomes armed. It is
expected that the mine will lie horizontally or nearly so, and the weight of
the magnetophone will cause it to swing to a hanging position. |
