Tele-Geo-Dynamics is the transmission of sonic or acoustic vibrations, which can be produced with comparatively simple apparatus. There is of course much sonic equipment available now for different applications, but this has little or nothing to do with Nikola Tesla's oscillator-generator. What Tesla proposed represents a new technology in sonic transmission even today.
In Tesla's oscillator-generator, a Resonance effect can be observed. Since resonance seems to be an ever increasing effect with this oscillator-generator, it can be deduced that there must be a great source of energy available through it.
Why can a resonance be created in the oscillator-generator when it cannot in a ordinary reciprocating engine? With the oscillator-generator, all governing mechanisms are eliminated. On the other hand, consider the car engine. Starting with the cylinder, a reciprocating motion is converted into rotary motion by a means of shafts, cranks, gears, drivetrains, transmissions, etc.
These parts all consume work by friction, but the greatest loss occurs in the change from reciprocating to rotary motion. At each point every varying inclination of the crank and pistons work at a disadvantage and result in loss of efficiency.
In Tesla's oscillator-generator, the piston is entirely free to move as the medium impels it without having to encounter and overcome the inertia of a moving system and in this respect the two types of engines differ radically and essentially.
This type of engine, under the influence of an applied force such as the tension of compressed air, steam, or other gases under pressure, yields an oscillation of a constant period.
The objective of the Tesla oscillator-generator is to provide a mechanism capable of converting the energy of compressed gas or steam into mechanical power. Since the oscillator-generator is denuded of all governing devices, friction is almost non-existent. In other words, the piston floats freely in air and is capable of converting all pressure into mechanical energy.
Our objective in building the engine is to provide an oscillator which under the influence of an applied force such as the elastic tension of a gas under pressure will yeild an oscillating movement which within very wide limits, will be of constant period, irrespective of variation of load, frictional losses, and other factors which in ordinary engines change in the rate of reciprocating.
It is a well-known priciple that if a spring possessing a sensible inertia is brought under tension, i.e., being stretched, and then freed, it will perform vibrations which are isochronous. As far as the period in general is concerned, it will depend on the rigidity of the spring, and its own inertia or that of the system of which it may form an immediate part. This is known as Simple Harmonic Motion.
This simple harmonic motion in the form of isochronous sound vibrations can be impressed upon the earth, causing the propagation of corresponding rhythmical disturbances through the same which pass through its remotest boundaries without attenuation so that the transmission is affected with an efficiency of one hundred percent.
Prodigal Genius: The Life and Times of Nicola Tesla, by John O'Neill