Douglas Torr

Excerpts from patents by Dr. Douglas Torr


Dr. Douglas G. Torr is presently employed by the US Department of Defence, working on classified projects as a consequence of his company PST Associates LLC status of a former US Department of Defense contractor.

Earlier, Dr. Torr had collaborated with Dr. Ning Li at the University of Alabama in Huntsville on the following research:

  • “Gravitational Effects on the Magnetic Attenuation of Superconductors”, Physical Review B, V46, N9, p. 5489 (SEP 01 1992)
  • “Effects of a Gravitomagnetic Field on Pure Superconductors”, Physical Review D, V43, N2, p. 457 (JAN 15 1993)
  • “Gravitoelectric-Electric Coupling via Superconductivity”, Foundations of Physics Letters, V6, N4, p. 317 (AUG 01 1993)


Prof. Timir Datta was involved in the university-funded development of a “Gravity Generator” in 1996 and 1997, with then-fellow university researcher Dr. Douglas G. Torr. According to a leaked document from the Office of Technology Transfer at the University of South Carolina and confirmed to Wired Magazine reporter Charles Platt in 1998, the device would create a “force beam” in any desired direction and the university planned to patent and license this device. Neither information about this university research project nor any “Gravity Generator” device was ever made public. Despite the apparent less than successful outcome of the “Gravity Generator” development effort with Douglas Torr, Timir Datta became interested in the effects of electric fields on gravitation, expanding on Torr’s theoretical work on the subject.



The first and second electrodes are aligned to produce an inhomogeneous electric field when charged with a voltage potential and generate a gravitational effect. The electric field of the charged sphere is radial and therefore spherically symmetric. The spherical symmetry in turn produces a gravitational field with spherical symmetries. The electric field, E, of the charged sphere will decrease as 1/r2, where r is the distance from the center of the sphere. The derivative of the field scales as E/r where r is distance from the center of the sphere. Depending on the sign of its charge, the charged sphere would generate a gravitational force that would act to either attract or repel massive objects to or away from the center of the sphere.

A time-dependent electric field will produce a time-dependent propagation of a gravitational field away from the source at the speed of light with each cyclic reversal. Because of the miniaturization of the capacitor cells, the applied voltage could be varied at frequencies up to and beyond gigahertz. Amplitude or frequency modulating the source voltage using known techniques would produce a communication capability.

A device for generating an inhomogeneous electrical field includes first and second electrodes. The first electrode may be a portion of a sphere, a cone, a paraboloid, a cylinder; a hollow sphere, a hollow cone, a hollow paraboloid, or a hollow cylinder. The second electrode may be a portion of a sphere, a cone, a paraboloid, a cylinder, a hollow sphere, a hollow cone, a hollow paraboloid or a hollow cylinder.

All interactions in nature have been historically described in terms of four elementary forces: the strong force, the weak force, the electromagnetic force, and gravity. The strong force holds atomic nuclei together and is responsible for the energy released by nuclear reactions. The weak force is associated with radioactive decay and interactions between sub-atomic particles called neutrinos. Both strong and weak forces act over relatively short (e.g., sub-atomic) distances. The electromagnetic force can act over much longer distances than the strong and weak forces. For example, the electromagnetic force keeps directional compasses pointed north over the entire surface of the Earth. The electromagnetic force is also responsible for the attraction and repulsion of charged particles. The farthest-ranging forces are gravity and the electromagnetic force. Gravity keeps the Earth orbiting the Sun and can act over distances on a galactic scale.

An important issue in physics is the interaction of the four fundamental forces. Many physicists believe that the four fundamental forces can be described by a single unified theory. For example, the Standard Electroweak Theory explains how the electromagnetic and weak forces interact and relate to each other. The Standard Electroweak Theory unifies: the weak force and the electromagnetic force. Other theories supply explanations of how the strong force, the weak force, and the electromagnetic forces interact. Theories that harmonize all four fundamental forces are called “Super Unification” theories.

There have been reports of gravitational effects produced by devices involving various combinations of time-dependent electromagnetic and static electric and magnetic fields. Recent years have witnessed attempts to develop these technologies, as evidenced by the interest exhibited by various government agencies including NASA, DOD and the Department of Energy.

In July 2001, a three-day meeting of the American Institute of Aeronautics and Astronautics (AIAA) was held in Utah. V. Roschin and S. Godin presented a paper: An Experimental Investigation of the Physical Effects in a Dynamic Magnetic System. (American Institute of Aeronautics and Astronautics 2001 Meeting, AIAA-2001-3660). The paper described an assembly of static and rotating magnets, which purportedly achieved a gravitational effect. The authors reported reductions in observed weight ranging up to 35%. However, the paper gave no theoretical basis for the result.

Professor Timir Datta of the University of South Carolina and students and Dr. Ming Yin of Benedict University in Columbia, S.C. claim to have observed a gravitational effect in an experiment that placed a test mass in an electric field. They reported a change in weight of up to 6.4 parts in 106. An electric field was produced by an electrode pair comprised of a cone and a flat plate.

Another contribution to the theoretical understanding of gravitational and electromagnetic effects and their interrelation can be found in J. G. Vargas & D. G. Torr, The CartanEinstein Unification with Teleparallelism and the Discrepant Measurement of Newton’s Constant G, in Foundations of Physics, 29, 145-200 (1999).


  • Datta et al., “Gravitational Experiments Involving Inhomogeneous Electric Fields,” submitted to Nature magazine for publication 1999, unpublished.
  • Dimofte, “An Experiment Concerning Electrically Induced Gravitational Force,” Masters Degree Thesis, University of South Carolina, 1999.
  • R.L. Talley, “Twenty First Century Propulsion Concept”, Veritay Technology, Inc. report, May 1991.
  • D.L. Cravens, “Electric Propulsion Study”, Science Applications International Corp report, Aug. 1990.


US7327548 15 Sep 2004 5 Feb 2008 Pst Associates, Llc Field converter
US6891712 17 Oct 2002 10 May 2005 Pst Associates, Llc Field converter
US20050030139 * 15 Sep 2004 10 Feb 2005 Pst Associates, Llc Field converter
US20050099761 * 15 Sep 2004 12 May 2005 Pst Associates, Llc Field converter for thrust generation
WO2006033817A2 * 7 Sep 2005 30 Mar 2006 Pst Associates, Llc Field converter for thrust generation
WO2006033817A3 * 7 Sep 2005 16 Apr 2009 Pst Associates Llc Field converter for thrust generation


From the left:   Douglas Torr,  Ning Li,  and Larry Smalley  —



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