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:
May. 07, 1985
Filed:
Dec. 27, 1982
Frank H Bell, Logan, UT (US);
Thiokol Corporation, Chicago, IL (US);
Abstract
An inertia type friction initiator for rotating projectiles includes a metallic mass, retained by a shear pin and joined to one end of a metal twisted or braided wire or cable, that is set in motion upon impact of the containing projectile with a resistant media, the target. Friction of the cable with a friction primer mixture sets off the mixture. The mixture activates a booster explosive that, in turn, detonates to produce a blase wave which explodes the main charge of high explosive of the projectile. A keeper-washer/sleeve system connected to the cable prevents premature activation by projectile rotational acceleration on the flight axis. The other end of the cable is embedded in the friction primer mixture at an angle of 90 degrees to the central or flight axis. Minor on-axis impacts that may tend to occur during storage, handling, shipment and loading are precluded from causing initiator actuation by proper selection of the shear pin.