Abstract: A high-voltage spark gap device for operation in conjunction with a high-power electric generator and including an electric trigger system and at least two mutually spaced spherical main electrodes that cooperate pairwise and face each other, means for closing the current loop that are separated by a dielectric from the electrodes, the electric trigger system having as many trigger electrodes as there are main electrodes, the trigger electrodes being fitted with an insulating protector received in each main electrode of the device.

Abstract: An electrical linear actuator includes a stator assembly and a piston structure. The stator assembly includes a casing having a bore extending therethrough and about a longitudinal axis, a winding structure disposed within the bore and in contact with the casing and a plurality of stator elements connected to the winding structure and arranged circumferentially in a plurality of rows extending parallel to the longitudinal axis within the bore and disposed apart from one another to form longitudinally extending channels between adjacent ones of the rows. Each of the stator elements extends radially inwardly from the winding structure toward the longitudinal axis. The piston structure includes a shaft extending along the longitudinal axis and has an outer cylindrical surface and a plurality of piston elements arranged circumferentially in a plurality of rows extending parallel to the longitudinal axis.