Underwater detonating device

US4478149A · kind A · utility

Assignee

• Rheinmetall GmbH · DE

Inventors

• Gunter Backstein · Meerbusch, DE
• Hans W. Unger · Krefeld, DE
• Michael Günther · Koblenzer Straße, DE
• Dieter Kaltbeitzer · Goldkronach, DE
• Hendrik Veldhoen · Overijse, BE

Key dates

• Filing date: Sep 27, 1982
• Grant date: Oct 23, 1984
• Expiry date: Sep 27, 2002

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42C15/40
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An underwater ignition device is provided comprising a rotor, a detonator disposed at the rotor, a locking pin secured in position by a safety pin, a release pin maintained in position by the locking pin, a first water pressure safety device normally engaging the rotor and preventing a rotating motion of the rotor into an ignition position and a second water pressure safety device actuable after the locking pin is removed and after the first water pressure safety device has been actuated and capable of actuating the release pin for rotating the rotor into an ignition position. An ignition circuit employed comprises a digital logic connected to an analog receiver, dual driver stages connected to the digital logic, parallel discharge circuits connected to the dual driver stages and to a detonator and the voltage supply and suitable for selectively igniting the detonator or for short circuiting the voltage supply. The digital logic actuates two discharge circuits in successive time intervals (t.sub.1, t.sub.2, t.sub.3) depending on two frequency and time correlated input signals.