Munition

Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit

Patent

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Details

102427, F42C 1308

Patent

active

045804974

ABSTRACT:
In combination: an air core coil; a passive detector connected to said coil for giving a first output in response to change in the ambient magnetic field due to movement of a magnetic body near the coil; an active detector connected to the same coil and operable to create a local magnetic field about the coil and to give a second output in response to changes in the local field due to the movement of the body; apparatus energizing the active detector in response to the output of the passive detector; and apparatus giving a further output in response to simultaneous outputs from both the detectors.

REFERENCES:
patent: 3509791 (1970-05-01), Pechamat et al.
patent: 4308501 (1981-12-01), Tuccinardi et al.

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