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Topic: Induction coil

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	Newton Induction Coil
		This model of classical induction coil is the Newton Coil Company design that contains its own interrupter mechanism.
		We make these reproduction induction coils to order, using antique parts and fittings whenever possible for an original look and contemporary materials where appropriate for the best possible performance.
		For more information about our line of reproduction antique induction coils, please call us at 607 387-6752 or drop us a line at pvsci@arcsandsparks.com.
	www.arcsandsparks.com /classicnewton.html (0 words)

	Induction Coil - LoveToKnow 1911
		Induction coils are employed for physiological purposes and also in connexion with telephones, but their great use at the present time is in connexion with the production of high frequency electric currents, for Röntgen ray work and wireless telegraphy.
		A general description of the mode of constructing a modern induction coil, such as is used for wireless telegraphy or Röntgen ray apparatus, is as follows: The iron core consists of a bundle of soft iron wires inserted in the interior of an ebonite tube.
		If.the secondary terminals of the induction coils are connected to spark balls placed a short distance apart, then with an electrolytic break the discharge has a flame-like character resembling an alternating current arc.
	www.1911encyclopedia.org /Induction_Coil (3695 words)

	Induction Heating Theory And Principles
		The efficiency of an induction heating system for a specific application depends on several factors: the characteristics of the part itself, the design of the induction coil, the capacity of the power supply, and the degree of temperature change required for the application.
		Induction coils are normally made of copper tubing - an extremely good conductor of heat and electricity - with a diameter of 1/8" to 3/16"; larger copper coil assemblies are made for applications such as strip metal heating and pipe heating.
		Induction coils are usually cooled by circulating water, and are most often custom-made to fit the shape and size of the part to be heated.
	www.inductionatmospheres.com /induction_heating.html (980 words)

	Antique Radio Classified: With The Collectors
		Induction coils were used in wireless spark transmitters to step-up a pulsed voltage to a potential sufficient to break down a spark gap.
		The high voltage secondary of the induction coil is connected to a condenser, which is a Leyden jar or a heavy glass plate condenser, which feeds the spark gap and the primary of the oscillation coil.
		The oscillation coil secondary is connected to the transmitting antenna and to ground, and is also tuned to the same resonant frequency as determined by the oscillation coil secondary inductance and the capacitance of the antenna.
	www.antiqueradio.com /Gonshor_induction_06-98.html (563 words)

	Induction Coil (Site not responding. Last check: )
		Induction coils were eventually replaced by transformers which operated off the AC current.
		For example, if the voltage provided to the primary coil is 10 volts, and the number of turns in the primary and secondary coils are 200 and 400,000 respectively (2000 to 1 ratio), the induced voltage in the secondary coil is 20,000 volts.
		When current is applied to the primary coil, the iron hammer (a) on the end of the contact arm is pulled to the magnetized iron contact (b) at the end of the primary's iron core.
	www.orau.org /PTP/collection/xraytubes/inductioncoil.htm (427 words)

	Induction furnace havng a modular induction coil assembly - Patent 5416794
		An induction furnace is disclosed comprising a crucible for holding a material to be heated by the furnace, an induction coil assembly, and a module-support assembly surrounding and radially supporting the induction coil assembly so as to facilitate the replacement and reconnection of the induction coil assembly.
		The induction coil assembly comprises an induction coil, an upper yoke, a lower yoke, and a plurality of intermediate yokes.
		The induction coil assembly 12, as defined herein, comprises a helical induction coil 34, an upper yoke 36, a lower yoke 38 and a plurality of intermediate yokes 40.
	www.freepatentsonline.com /5416794.html (5996 words)

	INDUCTION COIL - Online Information article about INDUCTION COIL (Site not responding. Last check: )
		The current supplied to the primary circuit of the coil travels from the mercury in the vessel through the jet to the copper plate, and hence is periodically interrupted when the jet does not impinge against the plate.
		An induction coil for the transformation of alternating current is called a transformer (q.v.).
		If to the spark balls the secondary terminals of an ordinary induction coil are connected, and these spark balls are adjusted near one another, then when the ordinary coil is set in operation, sparks pass between the balls and oscillatory discharges take place in the circuit containing the spark gap.
	encyclopedia.jrank.org /I27_INV/INDUCTION_COIL.html (4686 words)

	About Induction Coils (Site not responding. Last check: )
		The induction coil is the direct ancestor of the modern-day transformer.
		Page’s induction coil employed a primary coil of some turns of heavy copper around a bundle of soft iron rods and a secondary coil of many turns of fine wire wrapped on the outside of this primary coil.
		Induction coils were rated according to the length of their sparks, and many a laboratory prided itself on the length of the spark their induction coil could jump.
	ww1.arcsandsparks.com /webpages2/arcsandsparks/aboutinductioncoils.html (332 words)

	About Induction Heating
		Induction heating is non-contact; heat is "induced" within the part itself by circulating electrical currents.
		In a basic induction heating setup, a solid state RF power supply sends an AC current through a copper coil, and the part to be heated is placed inside the coil.
		Coils are usually cooled by circulating water, and are most often custom-made to fit the shape and size of the part to be heated.
	www.coilfab.com /induction.html (477 words)

	Induction Coil - Uncyclopedia, the content-free encyclopedia
		The Induction Coil, spelt 'Induction Coil', was and still is a masterpiece of engineering, developed during the 14th century by Charles Babbage and Tina Turner.
		The basic design of the induction coil was that a large conductive ring (the 'equater') would circle the earth, and on applying electricity to it a theoretic effect, known as the Earth's Magnetic Field, would be 'induced'; hence the term Induction Coil.
		The initial purpose of the induction coil was as the ultimate super weapon, sucking bits off the Sun and aiming them toward the poles of the planet, creating a flashy stage-show like lights effect.
	uncyclopedia.org /wiki/Induction_Coil (386 words)

	Induction Furnaces - Basics of Foundry Melting Furnaces
		The principle of induction melting is that a high voltage electrical source from a primary coil induces a low voltage, high current in the metal, or secondary coil.
		Induction furnaces are ideal for melting and alloying a wide variety of metals with minimum melt losses, however, little refining of the metal is possible.
		The induction unit consists of an iron core in the form of a ring around which a primary induction coil is wound.
	www.atlasfdry.com /inductionfurnaces.htm (680 words)

	Induction Coil Design, Build and Repair
		The heart of any induction heating process is the coil assembly whose primary objective is to induce a current flow in the work piece.
		This induction coil is fabricated from water cooled high conductivity copper tubing - generally circular, rectangular, or square, dependant upon the application, and must be rugged to withstand constant usage.
		The configuration of the coil is determined by the metallurgical composition and physical size of the part; heating pattern required; depth of controlled heat penetration; and material handling of the part.
	www.radyne.com /coil.htm (328 words)

	Induction furnace patent invention (Site not responding. Last check: )
		An induction furnace wherein a susceptor made from an alloy comprising niobium, hafnium and titanium is positioned within the induction coil of the furnace.
		[0021] Surrounding cylinder (1) is an induction coil (6) having a length of approximately 2 metres and a thickness of approximately 0.015 metres.
		The induction coil (6) is encased in a steel cover (7) so that the system occupies a gas-tight space surrounding the furnace chamber which can be filled with nitrogen or other inert gases.
	www.freshpatents.com /Induction-furnace-dt20050825ptan20050185692.php (1646 words)

	Refractory metal-lined induction coil - Patent 4698473
		An improved induction coil of a type used in heat treating metal workpieces comprises a protective lining bonded to a copper coil, which lining is formed preferably of a substantially molybdenum alloy.
		It is an object of this invention to provide an improved induction coil having an extended useful life, which coil comprises a protective thin refractory metal lining on workpiece-adjacent surfaces to reduce corrosion, pitting and wear that would otherwise shorten the life of the coil.
		Prior to forming the coil, the faying surface of strip 20 is coated with the solder compound, placed against the copper surface, heated to a temperature sufficient to melt the solder, and cooled to form an integral solder bond between tube 11 and strip 20, whereafter the bonded assembly is wound to shape coil 10.
	www.freepatentsonline.com /4698473.html (1694 words)

	The Heating Zone: Coil Design And Fabrication, Part 3
		Another factor in the selection of tubing for induction coils relates to the fact that the current in the work coils is traveling at a specific reference depth that depends on the power supply frequency and the resistivity of the copper.
		For heating of steel billets, coils are usually cast in a refractory cement to prevent scale from the part from falling between the turns.
		In coating of coils with refractory materials, care must be taken to match the pH of the refractory to that of the material being heated; for example, an acidic refractory is required for the ferrous scale that drops off during high-temperature healing of steels.
	www.stanleyzinn.com /zone_coils_3.html (2265 words)

	Induction Coil
		The original induction coil was invented in 1836 by Nicholas Callan (1799-1864), a priest and the professor of natural philosophy at St.
		Although he did not invent the induction coil, his name is often associated with it (particularly in Europe) because he successfully put together all of the elements of the coil, including the use of the condenser connected across the primary to moderate the back EMF of the collapsing magnetic field of the secondary.
		The five small Induction Coils below are typical of instruments bought in the last third of the nineteenth century and the first part of the twentieth century by colleges and universities for demonstration use.
	physics.kenyon.edu /EarlyApparatus/Electricity/Induction_Coil/Induction_Coil.html (1277 words)

	Inductotherm India Pvt. Ltd.-induction, furnace, melting, heating, heat treatment, welding, reheating, foundry, steel, ...
		The coreless induction furnace is composed of a refractory container, capable of holding the molten bath, which is surrounded by a water cooled helical coil connected to a source of alternating current.
		The induction (generation) of the electrical current in a conductive metal (charge) placed within a coil of conductor carrying electrical current is known as electromagnetic induction of secondary current.
		As in general induction heating application, the induced current path in the work piece (formed strip) tends to confirm to the shape of the induction coil.
	www.inductothermindia.com /tech.htm (476 words)

	Inductotherm, Safety Pages - Page 2
		Combustion furnaces and induction furnaces produce heat in two entirely different ways.In a combustion furnace, heat is created by burning a fuel such as coke, oil or natural gas.
		Induction furnaces require two separate electrical systems: one for the cooling system, furnace tilting and instrumentation, and the other for the induction coil power.
		Electricity for the induction coils is furnished from a three-phase, high voltage, high amperage utility line.
	www.inductotherm.com /safety/safety2.htm (1124 words)

	Induction Coils
		Induction coils fascinated me, from the very beginning of my interest in electricity.
		Very widespread contemporary application is in automotive ignition coils, relevant to tesla coilers as power supplies for tiny TC's, but more so as HV elements in the recent development of triggered spark gaps.
		The analysis of induction coils reveals a close proximity to the one on Tesla coils.
	home.datacomm.ch /k.schraner/induction_coils.htm (339 words)

	Welcome to Girard Engineering!
		The type and quantity of the induction coil assemblies to be used is dependent upon the specific installation and the size and shape of the material to be heated.
		The basic coils are manufactured from highly conductive copper section, and the size and section of this copper will again be dependent upon the size and shape of the material to be heated.
		The coil assembly is cast in refractory cement and the cast coil is encased in an insulated box.
	www.girard.cc /newelco/coil_design.php3 (552 words)

	Induction Heating & Induction Heating Equipment
		Induction heating has been traditionally used to heat metal parts in applications such as soldering, brazing, hardening and melting of metals.
		The power from modern induction heating systems is so controllable, that is may be used to create ceramic components at temperatures in excess of 2400oC or it may be used to gently cure adhesive for bonding the felt light trap to a 35mm film cassette.
		It involves a source of alternating current (the induction heater), induction coil (often called the work coil) and the part to be heated (the work piece).
	www.habibintl.com /induction_heating_equipment.htm (329 words)

	Re:mote Induction: Coil - Astral Disaster
		Coil's Astral Disaster was originally released as a vinyl edition limited to 99 copies.
		This year a CD version was released with the track listing rearranged and a sixth track added as an extra.
		Typically Coil piano melody mixing to conclusion with less predictable elements - falling in an exaggerated collapse.
	members.tripod.com /rem_ind/audio/coilastral.htm (488 words)

	Variable Damping Induction Coil for Metal Detection
		First is the high kickback voltage of the transmitter coil, which temporally blinds the receiver coil from the amplifying metal target signals near the turn-off time of the transmitter coil.
		A coil coupled with an electronic switch is charged with current from the power source in a transmitter mode such that when the electronic switch is abruptly switched closed the coil emits a magnetic field that induces eddy currents in a metal target.
		The variable resistor is coupled across the coil for varying the resistance across the coil to optimize the PMID sensitivity to the metal target.
	www.jhuapl.edu /ott/technologies/technology/articles/P01973.asp (225 words)

	All the POWER without the HEAT
		This coil generates a magnetic field when cookware is placed in contact with the cooktop surface, causing induced currents to flow through the base of the cookware.
		Second, thermal inertia is eliminated, since it is by placing or removing the cookware on the cooktop’s surface that activates or deactivates the induction coil.
		Close-up of induction coil which is made of copper wiring wrapped and sealed in a plastic casing and stainless steel frame for protection.
	www.divainduction.com /induction_101.php (274 words)

	Curing with induction heating
		A special work coil design is used that allows the preferential heating of components on a simple continuous motion conveyor system i.e.
		Induction heating energy is applied local to the weld area.
		An induction coil is being used to heat the tube prior to the tube passing in to a powder coating spray booth on the left.
	www.cihinduction.com /curing1.htm (474 words)

	Reconfigurable Induction Coil for Metal Detection
		A commonly used sensor for mine and UXO detection is the electromagnetic induction (EMI) metal detector.
		The Johns Hopkins University Applied Physics Laboratory has developed and is in the process of patenting a Pulse induction metal detector (PMID) that can selectively change the receiver coil configuration from a differential configuration good for detecting and classifying smaller metal objects to a summing configuration good for detecting and classifying large metal objects.
		A switch coupled with the receiver coil that switches couplings in the receiver coil to create either the differential or summing configuration achieves the conversion from one mode to the other.
	www.jhuapl.edu /ott/technologies/technology/articles/P01974.asp (295 words)

	www.vlf.it - Large Induction Coil for ULF monitoring
		For the construction of my coil I luckily found two volunteers to help me. One volunteer had to control the electric drill, the second had to help the wire being unwounded from the big coil of copper bought in a factory and I had to distribute the turns as a scrambled winding.
		The coil has been excited with a function generator and the output voltage was measured with an oscilloscope as shown in the image on the right.
		Rw is the resistance of the wire, L the inductance and Cp the parasite capacitance.
	www.vlf.it /matteobruna/ULF_Induction-Coil.htm (2451 words)

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