NOVELTY - The resettable mechanism has a distance multiplier that is engaged by an electromechanical actuator. A latch mechanism restrains the load, and releases the load when acted upon by the distance multiplier. A preloading unit regulates the degree of actuation of the actuator that is necessary for the latch to release the load. An ejector unit (5) displaces the load when it is released by the latch. The actuator is a piezoelectric transducer driven by a voltage between 90-200V.    USE - Resettable mechanism for restraining load e.g. sensor booms, solar panels, hatches, releasable stores such as missiles and sensor packages, used in power system of vehicle and in aerospace fields.    ADVANTAGE - The friction between the components within the mechanism is reduced by using a rolling contact for transfer of motion through the distance multiplier while positioning the actuator remotely from the latch. The likelihood of premature release under shock loads can be reduced without increasing the thickness of the power system so that the volume is limited. By using piezoelectric ceramic element of greater cross sectional area, larger loads can be retained and released for a given actuator volume. The releasable latching device is encased within the casing to prevent the ingress of water, dust, or other contaminants, loose cabling or other obstructions from fouling the moving portions of the releasable latching device. The casing is conductive if the piezoelectric ceramic element is suitably protected from the short circuits so that casing is used as a return for the actuation signal and the mass associated with wiring is reduced. The increase in the piezoelectric ceramic element cross-section enables a greater retention forces to be achieved while an increase in the length of the piezoelectric ceramic element results in a greater lever displacement.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the resettable release device.    Casing (1)    Levers (2,3)    Locking collar plate (4)    Ejector (5)    Deployable pin (6)    Ejector spring (10)