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Topic: Ignitron

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	Ignitron - Tubeopedia
		Ignitrons were long used as high-current rectifiers in major industrial installations where thousands of amperes of AC current must be converted to DC, such as aluminum smelters.
		Large electric motors were also controlled by ignitrons used in gated fashion, in a manner similar to modern semiconductor devices such as silicon controlled rectifiers and triacs.
		Because they are far more resistant to damage due to overcurrent or back-voltage, ignitrons are still manufactured and used in preference to semiconductors in certain installations.
	www.tubeopedia.com /index.php?title=Ignitron (321 words)

	High power protection apparatus - Patent 4156264
		Ignitrons are known in the art as current-shunting protective devices in event of faults in systems employing high voltages and/or high currents.
		The ignitor electrode of the ignitron is connected to receive a firing voltage from a fault detection circuit for triggering the ignitron in the presence of a fault condition, e.g., the development of over-current due to a flash-arc fault within the high-power radio-frequency generator vacuum tube.
		Both the ignitron 20 and the thyratron 26 are triggered simultaneously.
	www.freepatentsonline.com /4156264.html (2606 words)

	Ignitron - Wikipedia, the free encyclopedia
		An ignitron is a type of controlled rectifier dating from the 1930s.
		Ignitrons were long used as high-current rectifiers in major industrial installations where thousands of amperes of AC current must be converted to DC, such as aluminum smelters.
		Large electric motors were also controlled by ignitrons used in gated fashion, in a manner similar to modern semiconductor devices such as silicon controlled rectifiers and triacs.
	en.wikipedia.org /wiki/Ignitron (331 words)

	Ignitron (Site not responding. Last check: )
		An ignitron is a type of controlled rectifier dating from the 1930s.
		Ignitrons were long used as high-current rectifiers in major industrial installations where thousands of amperes of AC current must be converted to DC, such as aluminum smelters.
		Large electric motors were also controlled by ignitrons used in gated fashion, in a manner similar to modern semiconductor devices such as silicon controlled rectifiers and triacs.
	www.1bx.com /en/Ignitron.htm (316 words)

	KPN Consulting
		The mercury sits in a puddle at the base of the ignitron, which is the cathode.
		The experiment involves allowing a measured pulse of current to pass through the ignitron, whilst the scale is visually observed for possible variation.
		The two voltage probes are used to measure the voltage drop across the entire circuit (ignitron and resistor) and the current sensing/ballast resistor, providing accurate voltage and current replica signals.
	www.kpnconsulting.com /Research1.htm (390 words)

	AP3302 - Radar Theory
		The ignitron is one such valve which works on a similar principle to that of a mercury arc rectifier.
		In the ignitron (Fig 12) the valve envelope is usually made of steel, which mercury does not ‘wet’, and the arc is struck by a rod of silicon carbide or boron carbide (the igniter) which dips permanently into the mercury pool.
		Thus the ignitron may be used in much the same way as a thyratron to provide a rapid discharge of the delay line through the load.
	www.radarpages.co.uk /theory/ap3302/sec2/ch10/sec2ch10p162.htm (415 words)

	[No title]
		Gerwert, when a material (e.g., an ignitron tube) is being sent for reclamation, it is necessary to determine what type of secondary material it is in order to define the material as a solid waste under Subtitle C of RCRA.
		If the ignitron tube is considered a solid waste under 40 CFR Section 261.2(c), the unit would likely be a hazardous waste because the mercury component may exhibit the hazardous waste characteristic of EP toxicity.
		The non-functional ignitron tubes from the welding equipment meet the definition of spent material and are solid waste under Subtitle C of RCRA when sent for reclamation (mercury recovery).
	yosemite.epa.gov /OSW/rcra.nsf/Documents/FB58B06CC44A6647852566110067ACF9 (608 words)

	Meningar.com om ignitron. Ignitron, tube, elektronik mm.
		Back Ignitron Back The Ignitron The ignitron is a mercury vapor rectifier in which an arc is switched between a (usually graphite) anode and a mercury pool cathode...
		The non-functional ignitron tubes from the welding equipment meet the definition of spent material and are solid waste under Subtitle C of RCRA when sent for reclamation (mercury recovery)...
		You further argue that even though the ignitron tube is burned out and can no longer serve its intended use, the tube's failure is not due to contamination of the mercury or any other part of the tube...
	www.meningar.com /ignitron.html (822 words)

	Hirst Magnetic Instruments Ltd - Motor rewind magnetisers
		In most applications the required current is too large to be directly driven from the mains and/or the fixtures inductance/resistance is such that not enough current would flow to produce the required magnetic field.
		Ignitron outputs will be offered instead of the standard semiconductor devices if the peak current is exceedingly high and/or the rise time of the pulse is very short.
		Ignitrons may also be offered for machines where the fixture is “unknown” i.e.
	www.hirst-magnetics.com /magnetisers/mrw_p3.shtml (441 words)

	Lexikon Ignitron
		Ein Ignitron stellt damit einen in der Leistung einstellbaren Quecksilberdampfgleichrichter dar.
		Durch den speziellen Aufbau kÃ¶nnen Ignitron StrÃ¶me bis zu einigen 100.000 A gleichrichten und eigneten sich damit vor allem in Einsatzbereichen wo sehr hohe GleichstrÃ¶me wie bei der Schmelzflusselektrolyse benÃ¶tigt werden.
		Ignitrons wurden bis in die 1960er Jahre zur Realisierung von Phasenanschnittsteuerungen bei Leistungsgleichrichtern verwendet.
	lexikon.freenet.de /Ignitron (281 words)

	[No title]
		The ignitron is a mercury vapor rectifier in which an arc is switched between a (usually graphite) anode and a mercury pool cathode.
		Ignitrons must often be cooled when used continuously (i.e., Not single shot as in capacitor discharge) Water cooling is commonly employed.
		Most ignitrons operate at most currents between 5 Amps and 100kA and may be suitable for voltages from a couple of hundred to 20 000 Volts.
	www.tesla-coil.com /Ignitron.htm (407 words)

	[No title]
		An ignitron tube is a vacuum tube that can function as a closing switch in pulsed power (using a pulse of current rather than a continous current) applications.
		A closing switch is a switc h that is not }{\i on}{ or will not pass current until it is triggered to be on.
		The ignitron tube is turned on by a device called an \ldblquote ignitor.
	www.uah.edu /editing/Rude_Ch8_Ex3_Ignitron.rtf (232 words)

	IGNITRON : Encyclopedia Entry
		An ignitron is a type of controlled rectifier dating from the 1930s.
		Ignitrons were long used as high-current rectifiers in major industrial installations where thousands of amperes of AC current must be converted to DC, such as aluminum smelters.
		Large electric motors were also controlled by ignitrons used in gated fashion, in a manner similar to modern semiconductor devices such as silicon controlled rectifiers and triacs.
	www.bibleocean.com /OmniDefinition/Ignitron (303 words)

	Wide Bandwidth High Voltage Probes; Ignitron, Thyratron Drivers
		We also develop and manufacture support circuits for closing tubes including Thyratrons and Ignitrons (Thyratron drivers and Ignitron drivers).
		North Star builds two main types of high voltage probes - the PVM series designed for portability, and wide bandwidth, and the free standing VD series designed for long life and accuracy.
		The probe has a rugged nylon housing, and it is filled with dielectric oil for maximum high voltage stability.
	www.highvoltageprobes.com (415 words)

	[No title]
		The tip of the igniter dips into the mercury pool, and is specially shaped and made of a semiconducting material such as silicon carbide.
		Smaller ignitrons are glass and air cooled, larger ones are metal and water cooled.
		An example of an ignitron is the AJ5101.
	www.tubecollector.org /ignitron.htm (91 words)

	Hipotronics Documenation
		The ignitron anode is also heated by 2 power resistors located near the anode of the tube inside the protective plastic case.
		The ignitron is equipped with a holding anode to ensure that the tube will remain in conduction, even if the discharge current drops below the holding current or passes through zero due to ringing.
		The ignitron and circuit boards are normally covered by a clear plastic cover to prevent accidental contact with the DC voltages contained on them.
	www.jlab.org /~nelson/hipodoc1.htm (5963 words)

	Gas filled tube - Wikipedia, the free encyclopedia
		Depending on application, either glow discharge or arc discharge may be emphasised.
		Some important examples include the thyratron, krytron, and ignitron tubes.
		Specialized low-pressure gas filled tube devices include the Nixie tube (used to display numerals) and the Decatron (used to count or divide pulses, with display as a secondary function).
	en.wikipedia.org /wiki/Gas_filled_tube (252 words)

	Ignitron - Definition, explanation
		Developed from the Cooper-Hewitt mercury arc rectifier, General Electric was the original manufacturer and owned trademark rights to the name "Ignitron".
		An igniting electrode is pulsed to force conduction through the mercury vapor between the cathode and anode.
		Ignitrons were long used as high-current rectifiers in major industrial installations where thousands of amps of AC current must be converted to DC, such as aluminum smelters.
	www.calsky.com /lexikon/en/txt/i/ig/ignitron.php (214 words)

	Lecture Demonstration Laboratory
		In the diagram the cathode is at the bottom of the tube, the anode comes through the top and the 'tickler electrode' (the one used to excite the mercury) goes through the right side of the tube.
		We used an Ignitron tube as a switch because shorting the capacitor bank with a spark gap switch would be painfully loud in a small classroom.
		C2 is a capacitor used to excite the mercury in the Ignitron tube.
	physicslearning.colorado.edu /website_new/Common/ViewDemonstration.asp?Topic=5&Subtopic=5K20.65&DemoCode=5K20.65 (658 words)

	chaptereight.html
		Ignitron Tubes were first used in dc-arc welding power supplies.
		When there is no current the vaporized mercury goes to the bottom of the tube and turns back into liquid.
		When an Ignitron Tube turns on and passes current, this process is referred to as a shot.
	web.nwe.ufl.edu /~jdouglas/chaptereight.html (236 words)

	Hirst Magnetic Instruments Ltd
		Reverse polarity circuits ensure that the energy can be discharged either way through the fixture to provide pulses of either polarity.
		Ignitron outputs will be offered instead of semiconductor devices if the peak current is exceedingly high and/or the rise time of the pulse is very short.
		Ignitrons may also be offered for machines where the fixture is “unknown” or where fault conditions are expected that could damage semiconductor output devices.
	www.hirst-magnetics.com /magnetisers/mcsd_p3.shtml (1026 words)

	[No title]
		An ignitron tube is a vacuum tube that can function as a closing sw itch in pulsed power (using a pulse of current rather than a continous current) applications.
		The ignitron tube is turned on by a device called an \ldblquote ignitor.\rdblquote The ignitor sits in liquid mercury inside the vacuum tube.
		\par }\pard \s18\li720\ri360\sl480\slmult1\widctlpar\adjustright { \par }\pard \s18\li360\ri360\sl480\slmult1\widctlpar\adjustright {When an Ignitron Tube turns on and }{\ul passes}{ current, this process is referred to as a shot.
	www.abacon.com /rude/online/Ch6DAonline.rtf (388 words)

	[No title]
		An ignitron tube is a vacuum tube that can function as a clo sing switch in pulsed power (using a pulse of current rather than a continous current) applications.
		The ignitron tube is turned on by a device called an \'93ignitor.\'94 The ignitor sits in liquid mercury inside the vacuum tube.
		\par }\pard \s18\ql \li720\ri360\sl480\slmult1\widctlpar\aspalpha\aspnum\faauto\adjustright\rin360\lin720\itap0 { \par }\pard \s18\ql \li360\ri360\sl480\slmult1\widctlpar\aspalpha\aspnum\faauto\adjustright\rin360\lin360\itap0 {When an Ignitron Tube turns on and }{\ul passes}{ current, this process is referred to as a shot.
	occawlonline.pearsoned.com /divisions/longman/long_rude_techedit_3/docs/te8online.rtf (397 words)

	Lamp saves energy., Eye Lighting International
		November 8, 2002 - High Pressure Sodium (HPS) Ignitron EN/ES lamp, in standard wattages from 50 to 1000 W, saves up to 40 W per lamp, compared to standard HPS lamps.
		Ignitron is available in standard wattages ranging from 50 to 1000 watts.
		These two new Ignitron EN/ES lamps can save up to 40 watts per lamp compared to standard HPS lamps.
	news.thomasnet.com /fullstory/16260 (777 words)

	NOVEMBER "THE FABRICATOR"
		When plumbing or replacing hoses on ignitron tubes or SCRs, be sure to follow the manufacturer's recommendations.
		SCRs or ignitron tubes are the only components in the welding control that require water cooling.
		The best way to test the thermostats is to remove them from the SCR or ignitron tube and apply heat with a soldering iron.
	www.bannerweld.com /articl1.htm (1992 words)

	- WL-7171 ignitron data sheet?
		There are Ignitron spec sheets on the Richardson Electronics web site.
		I have ignitrons in a circuit that rings.
		Ignitron forward conducting every time it is forward biased for about
	forum.allaboutcircuits.com /newsgroups/viewtopic.php?t=1982 (879 words)

	OVERVOLTAGE PROTECTIVE DEVICE (US3601657)
		ignitron means connected across said terminal electrodes for short circuiting said terminal electrodes;
		voltage sensing means coupled to said terminal electrodes for actuating said ignitron means when the voltage at said terminal electrodes reaches a first predetermined value;
		means operative upon a short circuit of said terminal electrodes by said ignitron means for actuating said switch means; and
	www.delphion.com /details?pn=US03601657__ (269 words)

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