Currents of high potential of high and other frequencies

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Scientific authors' publishing Company, 1918 - 275 pages
 

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Page 255 - Ike current is directly proportional to the electromotive force and inversely proportional to the resistance.
Page 7 - In this arrangement, which the Committee believes originated with Dr. WJ Morton, one prime conductor of the static generator is grounded ; the other is connected with an electrode applied to the patient who is on an insulating stand. The current received by the patient is due to the spark discharge between the knobs of the prime conductors. The patient forms one coating of a Leyden jar condenser, the other coating of which is the earth and surrounding objects and walls connected electrically therewith.
Page 255 - ELECTRICITY: One of the fundamental quantities in nature consisting of elementary particles, electrons, and protons, which is manifested as a force of attraction or repulsion, and also in work that can be performed when electrons are caused to move; a material agency which when in motion exhibits magnetic, chemical, and thermal effects, and when at rest is accompanied by an interplay of forces between associated localities in which it is present.
Page 28 - The patient is directly in circuit with the outside coatings of two Leyden jar condensers in series. The spark-gap and machine are in multiple with each other. With the patient included in circuit in the manner shown in the diagram we do not know the value of the inductance and resistance offered by him. The arrangement of two condensers of small capacity is conducive to the production of oscillatory currents of relatively high frequency, and such currents will be produced if the patient offers a...
Page 256 - Insulation. The state in which the communication of electricity to other bodies is prevented by the interposition of a non-conductor; also, the material or substance which insulates.
Page 7 - The greater part of the charge and resulting strain on the dielectric air will be found at those parts of the patient and floor or walls of the room that are nearest together. , If the spark gap be long, the time of charging by the small continuous current will also be comparatively long, because the potential must be raised to a high point in order to produce a long spark. The duration of the discharge, which will probably be an oscillatory one of relatively high frequency because...
Page 258 - Congress, 1884) that the legal ohm is the resistance offered by a column of mercury 106 cm. high, 1 square mm. in cross-section, having about the resistance of 100 metres of telegraph wire. Ohm's Law. The strength of the current varies directly as the EMF and inversely as the resistance of the circuit, or the current expressed in amperes is equal to the EMF expressed in volts divided by the resistance expressed in ohms:!
Page 26 - ... when a small spark overcomes the resistance "of the intervening air, and 'breaks' when it fails to do so, and " the current is due to rapidly successive equalizations of the " differences of potential of oppositely charged condensers.
Page 255 - A medium intervening between an electric conductor and the object to which the current is to be applied. In electrotherapy, an electrode is an instrument with a point or a surface from which to discharge current to the body of a patient. Electrodesiccation.
Page 26 - It involves the removal of the spark, in itself more or less disagreeable and painful and often difficult to localize, especially about the face and neck, away from the patient's body, and yet retaining all the physiological effects of the kinetic or current part of the circuit.

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