NEW: Apparatus for experimental research with magnetism in biomedicine and biota ~~~
The Interlaced Asymmetrical Cores Transducer (IACT)

The IACT is an electrical transformer. Schematically it can be represented, basically, as a two windings electrical isolation transformer on two intertwining asymmetrical ferromagnetic cores, one annular (a toroid) and one cylindrical, suitable for a wide range of applications. Just like any transformer can have multiple windings for power distribution, the IACT can have multiple cores along its toroid with their own winding, for the same purpose and, unlike a traditional transformer which must be replaced or rebuilt from scratch if a winding fails, it would be conveniently serviceable. While at disadvantage if space is at premium, it has better permeability and overall enhanced heat dissipation throughout its structure, hence suitable even for high power applications and the high flux magnetic field which it generates might find diverse applications in experimental projects since it is suitable for experimental research/applications with induced audio frequency (AF), high frequency (HF), pulse or modulated superimposed signals into a magnetic field within a toroid for comparative researches in biology, botany, clinical applications as well as, at high power, experimental physics.

In he application described below* it produces, relative to the electrical power input, a variable density magnetic field within a toroidal coil superimposed with any desired frequency in the AF or HF spectrum which yields a no-invasive and no-heating transport agency of vibrational force. Concurrently, since the magnetic flux is self-contained in the toroidal coil, it will not target a selected area but a segment of a specimen within its volumetric space of a biological culture, or an organism, or an inert substance.

A variety of structures, electrical configurations and applications are available with the IACT; an experimental apparatus is here depicted.

A 64 cm (external diameter) toroidal coil made of a winding of approximately 1950 turns of 0.75 mm PVC insulated copper wire around an “H” section (31x24 mm) iron annulus (pictures 1-2) with a supplementary 8 ohm coil wound around a bi-conical ferrite core through which the toroidal coil is enclosed in a 96 mm. segment of its circumference (picture 3).
The 8 ohm coil (picture 4) has the function of an AF inductor from below 1 Hz to 30 kHz; the applied signal can be sine wave, square wave or complex wave from an audio signal generator, a pulse generator (figure 1) or, alternatively, any conceivable AF signal from diverse sources, viz. a computer, an ELF (Extra Low Frequency) or an ultrasonic generator, or a musical reproducer or whatever deemed proper. An audio amplifier supplies the AF signal to the toroidal coil through the 8 ohm coil which in this application replaces the amplifier’s speaker and this implies a fine control of the AF input power from the amplifier's volume control; an important consideration is the type of amplifier used in this respect, since a power Hexfet or a vacuum tube amplifier will produce even harmonics, while a solid state amplifier will produce odd harmonics.
An additional bifilar pi-coil of a few turns in between the toroid and the external core can be used for HF input or, otherwise, for output to instrumentation.
The power supply to the toroidal coil is supplied by a variable 0-16 volt DC full wave bridge rectifier; alternatively pure DC power (free from the 50HZ sine wave component of the distribution line) is supplied by a lead-acid battery with a voltage regulation from 1.2 to 13 volts; in this case, if the modulating source is not switched on, only a variable intensity static magnetic field is generated in which the toroid acts - if shunted - as a permanent magnet; a two-way commutator gives another choice by reversing to a low frequency (200 Hz to 30 kHz) modulating power supply (figure2). A variable resistive load in series with the toroidal coil regulates current input and the voltage/ampere reading on a digital display (picture 5a-5b) gives an indication of the power dissipation in watts. Connecting a DC to AC inverter ahead of the DC supply would allow experimentation with variable high AC voltages; utmost care should always be exercised to protect any equipment connected to the input coil from feedback from the same.
The IACT has a good response to diverse frequencies and waveforms input; a compass’s needle in the center of the toroid will show a remarkable shift, depending on power input. Unavailability of adequate digital testing equipment [no resources and no sponsors] does not allow exact specifications and, clearly, testing it within strict safety precautions.
The toroid, tiltable over 90°, is mounted either on an stainless steel stand (pictures 6a-6b-6c), or on a metal frame (pictures 7a-7b) where it can slide horizontally for a useful distance of 150 cm. wherewith a removable diamagnetic bench is inserted in between. It is electrically insulated from its setup while two supporting copper bolts prevent stray magnetic induction in the metal frame.

Built entirely from junk materials at hand, this apparatus is a prototype but as such fully functional; unlike the one described above which followed an undefined idea and grew up in a collector's junkyard, if properly planned with the appropriate formulations, parameters and materials for a well defined application it should allow many interesting options.

* Caution: while similar experimentation might find relevance also in medical and psychotherapeutic practice, the potentially disrupting AF (Hz) and audio power input (dB) relation in a self-contained magnetic field, particularly at extra low frequencies (ELF), should be used with extreme caution and only in strictly controlled experimental environments; not less so extreme caution is recommended if investigating possible developments with high voltages and high frequencies.
This is not a magneto-therapeutic device but a research device. To date there are no conclusive data asserting the clinical effectiveness of magnetic fields in medical practice, although an impressive amount of related literature asserts magneto-therapy as efficacious in clinical applications; this apparatus, by definition, is not a medical appliance. (A 2002 U.S. National Science Foundation report on public attitudes and understanding of science noted that magnet therapy is "not at all scientific."[19] A number of vendors make unsupported claims about magnet therapy by using pseudoscientific and new-age language. Such claims are unsupported by the results of scientific and clinical studies.[16] … In the United States, for example, U.S. Food and Drug Administration regulations prohibit marketing any magnet therapy product using medical claims, as such claims are unfounded.[20]).



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