Historical & Archival Devices
Historically significant devices and experiments that laid the groundwork for modern alternative energy research. These devices are documented primarily for educational and archival purposes — many are difficult or impossible to replicate with current knowledge.
Papp Engine
Josef Papp
An engine powered by the expansion of a proprietary noble gas mixture ignited by high voltage.
Testatika (Methernitha)
Paul Baumann
An electrostatic machine that allegedly produces continuous electrical power.
Clemente Figuera Generator (1908)
Clemente Figuera
A generator using electromagnets with specific commutator/switching arrangements in bucking coil configurations (N-N or S-S). One of the oldest documented overunity claims with patent evidence. Based on Spanish patents from 1902 and 1908.
Hendershot Generator
Lester J. Hendershot
Claims to generate electricity from Earth's magnetic field through resonance using basket-weave coils with internal capacitors and a permanent magnet 'buzzer' regulator. Based on 1920s radio technology.
T. Henry Moray Radiant Energy Device
T. Henry Moray
Specialized cold-cathode 'Moray valve' detector tubes with antenna and ground connections converted 'cosmic ray' or 'radiant sea' energy into electricity. Demonstrations reportedly powered 50 kW loads including lamps, motors, and heaters. The tube construction details are largely lost.