Discharge lamp ballast with reduced shock hazard
An electronic control system 4 for a discharge lamp D is connected to an AC source L4, N4 which is used to produce a high frequency sinusoidal wave form, preferably above 500kHz, at the output J4, K4 of the control. The sinusoidal wave form is supplied to a first F4 and second S4 terminals of the la...
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creator | LAWRENCE SAMUEL TYSON |
description | An electronic control system 4 for a discharge lamp D is connected to an AC source L4, N4 which is used to produce a high frequency sinusoidal wave form, preferably above 500kHz, at the output J4, K4 of the control. The sinusoidal wave form is supplied to a first F4 and second S4 terminals of the lamp through capacitors T4, M4 to limit the current flow at the terminals to below 30mA or more preferably 1mA so as to reduce the electric shock hazard to a user. A resistor R4' is connected to the control at a node H4 and provides a DC voltage to the first terminal of the lamp which can be detected at the second terminal S4 by sensor P4 to indicate to the control that the lamp is lit. |
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The sinusoidal wave form is supplied to a first F4 and second S4 terminals of the lamp through capacitors T4, M4 to limit the current flow at the terminals to below 30mA or more preferably 1mA so as to reduce the electric shock hazard to a user. A resistor R4' is connected to the control at a node H4 and provides a DC voltage to the first terminal of the lamp which can be detected at the second terminal S4 by sensor P4 to indicate to the control that the lamp is lit.</description><edition>7</edition><language>eng</language><subject>ELECTRIC HEATING ; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ; ELECTRICITY</subject><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020710&DB=EPODOC&CC=GB&NR=2370924A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020710&DB=EPODOC&CC=GB&NR=2370924A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LAWRENCE SAMUEL TYSON</creatorcontrib><title>Discharge lamp ballast with reduced shock hazard</title><description>An electronic control system 4 for a discharge lamp D is connected to an AC source L4, N4 which is used to produce a high frequency sinusoidal wave form, preferably above 500kHz, at the output J4, K4 of the control. The sinusoidal wave form is supplied to a first F4 and second S4 terminals of the lamp through capacitors T4, M4 to limit the current flow at the terminals to below 30mA or more preferably 1mA so as to reduce the electric shock hazard to a user. A resistor R4' is connected to the control at a node H4 and provides a DC voltage to the first terminal of the lamp which can be detected at the second terminal S4 by sensor P4 to indicate to the control that the lamp is lit.</description><subject>ELECTRIC HEATING</subject><subject>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRICITY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2002</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBwySxOzkgsSk9VyEnMLVBISszJSSwuUSjPLMlQKEpNKU1OTVEozshPzlbISKxKLErhYWBNS8wpTuWF0twM8m6uIc4euqkF-fGpxQWJyal5qSXx7k5GxuYGlkYmjsaEVQAAoygqOg</recordid><startdate>20020710</startdate><enddate>20020710</enddate><creator>LAWRENCE SAMUEL TYSON</creator><scope>EVB</scope></search><sort><creationdate>20020710</creationdate><title>Discharge lamp ballast with reduced shock hazard</title><author>LAWRENCE SAMUEL TYSON</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_GB2370924A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2002</creationdate><topic>ELECTRIC HEATING</topic><topic>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRICITY</topic><toplevel>online_resources</toplevel><creatorcontrib>LAWRENCE SAMUEL TYSON</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LAWRENCE SAMUEL TYSON</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Discharge lamp ballast with reduced shock hazard</title><date>2002-07-10</date><risdate>2002</risdate><abstract>An electronic control system 4 for a discharge lamp D is connected to an AC source L4, N4 which is used to produce a high frequency sinusoidal wave form, preferably above 500kHz, at the output J4, K4 of the control. The sinusoidal wave form is supplied to a first F4 and second S4 terminals of the lamp through capacitors T4, M4 to limit the current flow at the terminals to below 30mA or more preferably 1mA so as to reduce the electric shock hazard to a user. A resistor R4' is connected to the control at a node H4 and provides a DC voltage to the first terminal of the lamp which can be detected at the second terminal S4 by sensor P4 to indicate to the control that the lamp is lit.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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subjects | ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY |
title | Discharge lamp ballast with reduced shock hazard |
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