Safety apparatus for spinning projectile fuzes

A safety apparatus for a spinning projectile fuze for a projectile having a lengthwise axis, comprising:

• a substantially ball-shaped rotor which can rotate out of a safety position into an armed position;
• a closure body member;
• a support member;
• said rotor being rotatably mounted between said closure body member and said support member;
• a first substantially ring-shaped groove provided in said closure body member;
• said first ring-shaped groove being located in a plane which is disposed essentially perpendicular to the lengthwise axis of the projectile;
• a second substantially ring-shaped groove provided in said ball-shaped rotor;
• said second ring-shaped groove being located, in the safety position of the rotor, in a plane which is substantially perpendicular with respect to the lengthwise axis of the projectile;
• a safety spring in the form of a substantially ring-shaped disk member which protrudes both into the first ring-shaped groove and into the second ring-shaped groove for securing the rotor in its safety position;
• said safety spring being deformable by the firing acceleration and by the projectile spin for releasing the rotor for movement into its armed position;
• the ring-shaped disk member being subdivided by cut-outs into segments located in succession;
• and
• the successive segments being alternately directed in a substantially wave-shaped configuration upwardly and downwardly.