Releasing device with preset response sensitivity for electrical fuzes for use with mines

US4112844A · kind A · utility

Assignee

• Messerschmitt Bolkow Blohm GmbH · DE

Inventors

• Manfred Held · Hamburg, DE
• Hans Spies · Brackenheim, DE

Key dates

• Filing date: Sep 1, 1971
• Grant date: Sep 12, 1978
• Expiry date: Sep 1, 1991

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42C11/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.