Patent ID: 6951161
Filing Date: 2005-10-04
Classification: F42C

Abstract:
1. A safety and arming apparatus for arming a fuze of a smooth bore projectile, comprising: a first sensor and a spin rate sensor, the first sensor in cooperative electronic communication with the spin rate sensor, such that, when the first sensor senses a predetermined first condition and the spin rate sensor detects a predetermined second condition, the predetermined second condition being a predetermined number of spins within a predetermined window of time, the fuze is armed, wherein the spin rate sensor comprises: (a) a counting mechanism for counting each said rotation of the smooth bore projectile as it rotates around its longitudinal axis, the counting mechanism comprising: (b) a spin rate computation mechanism for determining a spin rate of the smooth bore projectile, wherein the spin rate computation mechanism is comprised of a timing mechanism operatively connected to the counter for determining the time for the smooth bore projectile to rotate a predetermined number of times.