Abstract: A lock box having a housing and a lid mounted to said housing. The housing has a ridge mounted about its inner periphery adjacent its open side. A retainer on the lid which is complementary to the ridge is mounted over the ridge to retain the lid in its mounted position. A spring biased pin is mounted to the lid and extends between a retracted position where the lid can be removed from the housing and an extended position where the lid is locked to the housing. A lock controls the position of the pin as it moves between the retracted and extended positions.

Abstract: A sonic generator comprises a resonant bar, a housing and magnetic excitation units connected between the resonant bar and the housing. The magnetic excitation units are connected to the bar using a mounting connection which is a sleeve having an inside diameter slightly greater than the outside diameter of the bar. A resilient elastomer such as urethane is mounted between the sleeve and the resonant member.