The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1978
Filed:
Sep. 01, 1971
Manfred Held, Kuhbach, DE;
Hans Spies, Pfaffenhofen, DE;
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.