Apparatus for controlling the ventilation of laboratory fume hoods
Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one moveable sash door adapted to cover the opening as the fume hood sash door is moved. The apparatus...
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| creator | AHMED OSMAN FRITSCHE STEVEN L JACOB STEVEN D BRADLEY STEVEN A |
| description | Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one moveable sash door adapted to cover the opening as the fume hood sash door is moved. The apparatus detects the position of each moveable sash door and calculates the size of the uncovered portion of the opening, measures the actual flow of air through the exhaust duct, and varies the flow of air through the exhaust duct responsive to door position signals and the actual flow signal for controlling a flow modulating means to maintain the predetermined average face velocity through the uncovered portion of the opening. |
| format | Patent |
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The apparatus detects the position of each moveable sash door and calculates the size of the uncovered portion of the opening, measures the actual flow of air through the exhaust duct, and varies the flow of air through the exhaust duct responsive to door position signals and the actual flow signal for controlling a flow modulating means to maintain the predetermined average face velocity through the uncovered portion of the opening.</description><edition>6</edition><language>eng</language><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING ; BLASTING ; CLEANING ; CLEANING IN GENERAL ; CONTROLLING ; HEATING ; LIGHTING ; MECHANICAL ENGINEERING ; PERFORMING OPERATIONS ; PHYSICS ; PREVENTION OF FOULING IN GENERAL ; RANGES ; REGULATING ; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ; TRANSPORTING ; VENTILATING ; WEAPONS</subject><creationdate>1995</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=19950214&DB=EPODOC&CC=US&NR=5092227B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19950214&DB=EPODOC&CC=US&NR=5092227B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>AHMED OSMAN</creatorcontrib><creatorcontrib>FRITSCHE STEVEN L</creatorcontrib><creatorcontrib>JACOB STEVEN D</creatorcontrib><creatorcontrib>BRADLEY STEVEN A</creatorcontrib><title>Apparatus for controlling the ventilation of laboratory fume hoods</title><description>Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one moveable sash door adapted to cover the opening as the fume hood sash door is moved. The apparatus detects the position of each moveable sash door and calculates the size of the uncovered portion of the opening, measures the actual flow of air through the exhaust duct, and varies the flow of air through the exhaust duct responsive to door position signals and the actual flow signal for controlling a flow modulating means to maintain the predetermined average face velocity through the uncovered portion of the opening.</description><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING</subject><subject>BLASTING</subject><subject>CLEANING</subject><subject>CLEANING IN GENERAL</subject><subject>CONTROLLING</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>PREVENTION OF FOULING IN GENERAL</subject><subject>RANGES</subject><subject>REGULATING</subject><subject>SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES</subject><subject>TRANSPORTING</subject><subject>VENTILATING</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1995</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNyrEOAUEQBuBtFIJ3mBeQsCKidEL0qC_jzLpNxv6b3TmJt6fwAKqv-cau2eXMhW2oFFCoQ7IC1ZgeZL3QS5JFZYtIhEDKN3wzypvC8BTqgXudulFgrTL7OXF0PFz2p7lktFIzd5LE2ut5vdh67zfNcvVH-QAoPzJe</recordid><startdate>19950214</startdate><enddate>19950214</enddate><creator>AHMED OSMAN</creator><creator>FRITSCHE STEVEN L</creator><creator>JACOB STEVEN D</creator><creator>BRADLEY STEVEN A</creator><scope>EVB</scope></search><sort><creationdate>19950214</creationdate><title>Apparatus for controlling the ventilation of laboratory fume hoods</title><author>AHMED OSMAN ; FRITSCHE STEVEN L ; JACOB STEVEN D ; BRADLEY STEVEN A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US5092227B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1995</creationdate><topic>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING</topic><topic>BLASTING</topic><topic>CLEANING</topic><topic>CLEANING IN GENERAL</topic><topic>CONTROLLING</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICS</topic><topic>PREVENTION OF FOULING IN GENERAL</topic><topic>RANGES</topic><topic>REGULATING</topic><topic>SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES</topic><topic>TRANSPORTING</topic><topic>VENTILATING</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>AHMED OSMAN</creatorcontrib><creatorcontrib>FRITSCHE STEVEN L</creatorcontrib><creatorcontrib>JACOB STEVEN D</creatorcontrib><creatorcontrib>BRADLEY STEVEN A</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>AHMED OSMAN</au><au>FRITSCHE STEVEN L</au><au>JACOB STEVEN D</au><au>BRADLEY STEVEN A</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Apparatus for controlling the ventilation of laboratory fume hoods</title><date>1995-02-14</date><risdate>1995</risdate><abstract>Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one moveable sash door adapted to cover the opening as the fume hood sash door is moved. The apparatus detects the position of each moveable sash door and calculates the size of the uncovered portion of the opening, measures the actual flow of air through the exhaust duct, and varies the flow of air through the exhaust duct responsive to door position signals and the actual flow signal for controlling a flow modulating means to maintain the predetermined average face velocity through the uncovered portion of the opening.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING CLEANING CLEANING IN GENERAL CONTROLLING HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS PREVENTION OF FOULING IN GENERAL RANGES REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TRANSPORTING VENTILATING WEAPONS |
| title | Apparatus for controlling the ventilation of laboratory fume hoods |
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