Abstract: A microwave absorbing ablating material is used as the ablative covering between the transmitting and receiving antennas while a standard ablating material, allowing the transmission of signals, is placed about the antennas. This allows signals to be transmitted from and received by the object covered by RF absorbing ablating material while preventing the transmission of signals transversely through the material. The RF absorbing, ablating material is made by combining an RF absorbing material with an ablating material in sufficient quantities to absorb and dissipate any signals that may be exposed to the ablative material.

Abstract: In a fuse for spinning explosive projectiles, a base member having a sliding member mounted thereon for generally radially outwardly sliding movement in response to centrifugal force, a shear pin holding the sliding member in a safe position with a piston actuator mounted to break the shear pin upon proper actuation thereof to allow the sliding member to move to an arm position, a detonator mounted so as to be properly positioned only when the sliding member has moved to the arm position, switch means normally maintaining the piston actuator and the detonator in a safe mode and operating in response to centrifugal force and the movement of the sliding member to provide a circuit for the actuation of the piston actuator and the detonator, a battery actuatable in response to setback and spin of the projectile, and redundant and sequential electrical timing means connected to the battery and the switch means for activating the piston actuator a predetermined time after the battery is activated and for arming the