Releasing device with preset response sensitivity for electrical

Details Releasing device with preset response sensitivity for electrical Releasing device with preset response sensitivity for electrical

1971-09-01

1978-09-12

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

F42C 1514

Patent

active

041128443

ABSTRACT:
The releasing device comprises a piezoelectrical acceleration pick-up conted electrically with a parallel connection comprising a first instantaneous-response and a second delayed-response threshold switch, the switches having different respective threshold values. A switch actuated by the threshold switches is also incorporated which, in the presence of a signal from the first threshold switch, blocks ignition initiation. When the second threshold switch has a considerably lower threshold value than the first, ignition is initiated only in the event of slight accelerations of the piezoelectrical acceleration pick-up, for instance on manual mine clearance. In the event of strong, short-term shock pressures, for example due to a shell detonating in the vicinity of the releasing device, ignition is hindered.

REFERENCES:
patent: 2411787 (1946-11-01), Hammond
patent: 2569808 (1951-10-01), Ensign
patent: 2702003 (1955-02-01), Johnson
patent: 2802420 (1957-08-01), MacDonald
patent: 3094929 (1963-06-01), McGinley et al.
patent: 3397329 (1968-08-01), Riedel
patent: 3665860 (1972-05-01), West

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