Various embodiments of the present invention are directed toward a linear combustion engine, comprising: a cylinder having a cylinder wall and a pair of ends, the cylinder including a combustion section disposed in a center portion of the cylinder; a pair of opposed piston assemblies adapted to move linearly within the cylinder, each piston assembly disposed on one side of the combustion section opposite the other piston assembly, each piston assembly including a spring rod and a piston comprising a solid front section adjacent the combustion section and a gas section; and a pair of linear electromagnetic machines adapted to directly convert kinetic energy of the piston assembly into electrical energy, and adapted to directly convert electrical energy into kinetic energy of the piston assembly for providing compression work during the compression stroke.

An energy storage apparatus for storing energy transmitted by a power transmission line includes an elastically deformable component and an actuator-generator. The actuator-generator is coupled to the elastically deformable component such that both mechanical and electrical actuation of the actuator-generator causes a generation of electrical energy by the actuator-generator via a release of tension in the elastically deformable component.

A vibrating motor is provided in the present disclosure. The vibrating motor includes a shell, a base covered by the shell for forming an accommodating space, a vibrating system accommodated in the accommodating space, and a pair of elastic connectors connected to two opposite ends of the vibrating system respectively for elastically suspending the vibrating system in the accommodating space. Each elastic connector includes a first elastic member and a second elastic member for connecting a corresponding end of the vibrating system to the shell; the first elastic member includes a first elastic arm, and the second elastic member includes a second elastic arm crossing over and interesting with the first elastic arm.

A vibration motor includes a housing; a vibration unit accommodated and suspended in the housing, the vibration unit including a first vibrator having a first resonant frequency, and a second vibrator having a second resonant frequency; a first elastic member having one end fixed to the first vibrator and another end fixed to the housing for suspending the first vibrator in the housing; and a second elastic member having one end fixed to the second vibrator and another end fixed to the housing for suspending the second vibrator in the housing. By virtue of the configuration, the vibration motor is capable of working at two different resonant frequencies.

An electro-mechanical energy harvesting switch configured to provide at least two different control signals comprises: a generator activating member (9) configured to move between a rest position and a maximum loaded position; at least one spring (11, 13) configured to force the generator activating member towards the rest position; and a unidirectionally rotating protrusion member (17) comprising at least one protrusion (21) configured to move through a protrusion's path during rotation of the protrusion member (17), through a first position of the protrusion (21), in which first position the protrusion (21) is engaged with the generator activating member (9) in the rest position, and through a second position, the protrusion (21) thereby carrying the generator activating member (9) from the rest position to the maximum loaded position against the force of the at least one spring (11, 13).

Systems, devices for a tangentially actuated magnetic momentum transfer generator, and methods of use thereof, are provided. In an aspect, the generator includes a plurality of turns of wire forming a coil, a rotating magnet positioned in the coil, at least one stationary magnet positioned about the coil, and a slider movable relative to the rotating magnet in a direction tangential to an outer surface of the rotating magnet are provided. The slider can be configured to cause rotation of the rotating magnet, and the rotation of the rotating magnet and/or an interaction of the rotating magnet with a magnetic field of one or more of the at least one stationary magnet and the slider magnet can induce a voltage across a first terminal end and a second terminal end.

An electrical generator is provided that includes a coil winding having a first surface and a second surface parallel to the first surface, a first magnet provided in the coil winding, wherein the first magnet is arranged to rotate about an axis of rotation extending in a first direction parallel to the first and second surfaces, a slider arranged to move tangentially parallel to the first surface and the first magnet in a second direction perpendicular to the first direction, wherein movement of the slider causes the first magnet to rotate about the axis of rotation, thereby inducing a voltage across a first terminal end and a second terminal end of the coil winding.

Various embodiments of the present invention are directed toward a linear generator, comprising: a cylinder having a cylinder wall and a pair of ends, the cylinder including a reaction section disposed in a center portion of the cylinder; a pair of opposed piston assemblies adapted to move linearly within the cylinder, each piston assembly disposed on one side of the reaction section opposite the other piston assembly, each piston assembly including a spring rod and a piston comprising a solid front section adjacent the reaction section and a gas section; and a pair of linear electromagnetic machines adapted to directly convert kinetic energy of the piston assembly into electrical energy, and adapted to directly convert electrical energy into kinetic energy of the piston assembly for providing compression work during the compression stroke.