Abstract: Multiple, interconnected shielding portions (26,28,30) constitute a protection structure (22) which may be arranged relative to a console (10) in an obstructing position so as to shield instruments contained in the console (10) from damage. The multiple shielding portions (26,28,30) are relatively displaceable to permit common occupation of all the shielding portions (26,28,30) in an envelope formed by one of the shielding portions (26). Such common occupation or self-storing design permits the protection structure (22), when removed from the console (10), to be stored in a minimum of space. The protection structure (22) may be assembled in obstructing relationship with the console (10) by displacing the individual shielding portions (26,28,30) to predetermined positions prior to interconnecting the console (10) and one of the components (28) with tabs (38) connected to the component (28) into slots in the console (10).

Abstract: Upper and lower separate pistons confining a constant volume of liquid in upper and lower chambers separated by a horizontal partition. A valve closing an aperture in the partition and opened by liquid in upper chamber moving to lower chamber when upper piston is pushed downwardly, the lower piston being moved downward by the liquid thus added to lower chamber. Orifice in valve permitting coil spring on lower piston to slowly raise lower piston and thereby return liquid from lower to upper chamber while valve is closed and downward push is absent from upper piston. A normally-open switch in electric fuze circuit, closable by lower piston upon attainment of a predetermined downward displacement, the upper piston being downwardly pushable through a one-way clutch by a plunger downwardly pushable by an external force and upwardly returned by an internal coil spring.