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Patent Agency Ranking
公开(公告)号：FR2459943A1
公开(公告)日：1981-01-16
申请号：FR8014268
申请日：1980-06-26
Applicant: ELECTRONICS CORP AMERICA
Inventor： WEINER NATHAN K , WEYMAN PETER J , KETCHUM DAVID D
Abstract: Method and apparatus for evaluating the quality of a flame in response to outputs from a flame sensor. The present invention includes a method and apparatus in which output pulses from a flame sensor are continuously counted.The number of pulses is accumulated over a time interval of a predetermined length and compared with a threshold value. The accumulated total is continuously updated to reflect the pulses received over the previous time interval to effectively provide a moving time-window of a fixed length over which pulses from the flame sensor are accumulated. Other additional checks may be made to ascertain that a flame is present, including the time over which no pulses are detected and a long-term average of the number of pulses. A preferred embodiment disclosed in which numerous self-checking features are incorporated, and which includes a novel bar-graph type of display for displaying flame quality and diagnostic information.
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公开(公告)号：DE3024013A1
公开(公告)日：1981-01-08
申请号：DE3024013
申请日：1980-06-26
Applicant: ELECTRONICS CORP AMERICA
Inventor： WEINER NATHAN K , WEYMAN PETER J , KETCHUM DAVID D
Abstract: Method and apparatus for evaluating the quality of a flame in response to outputs from a flame sensor. The present invention includes a method and apparatus in which output pulses from a flame sensor are continuously counted.The number of pulses is accumulated over a time interval of a predetermined length and compared with a threshold value. The accumulated total is continuously updated to reflect the pulses received over the previous time interval to effectively provide a moving time-window of a fixed length over which pulses from the flame sensor are accumulated. Other additional checks may be made to ascertain that a flame is present, including the time over which no pulses are detected and a long-term average of the number of pulses. A preferred embodiment disclosed in which numerous self-checking features are incorporated, and which includes a novel bar-graph type of display for displaying flame quality and diagnostic information.
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公开(公告)号：CA1173129A
公开(公告)日：1984-08-21
申请号：CA354866
申请日：1980-06-26
Applicant: ELECTRONICS CORP AMERICA
Inventor： WEINER NATHAN K , WEYMAN PETER J , KETCHUM DAVID D
Abstract: Method and apparatus for evaluating the quality of a flame in response to outputs from a flame sensor. The present invention includes a method and apparatus in which output pulses from a flame sensor are continuously counted. The number of pulses is accumulated over a time interval of a predetermined length and compared with a threshold value. The accumulated total is continuously updated to reflect the pulses received over the previous time interval to effectively provide a moving time-window of a fixed length over which pulses from the flame sensor are accumulated. Other additional checks may be made to ascertain that a flame is present, including the time over which no pulses are detected and a long-term average of the number of pulses. A preferred embodiment disclosed in which numerous self-checking features are incorporated, and which includes a novel bar-graph type of display for displaying flame quality and diagnostic information.
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公开(公告)号：CA1138045A
公开(公告)日：1982-12-21
申请号：CA350934
申请日：1980-04-30
Applicant: ELECTRONICS CORP AMERICA
Inventor： WEINER NATHAN K , KETCHUM DAVID D
Abstract: An interface circuit for indicating the state of a set of switch contacts having high noise immunity and high reliability. The switch contacts to be monitored are connected in series with the primary winding of a transformer having a magnetic core with a highly rectangular hysteresis loop. A voltage is periodically applied through the switch to the transformer primary. A test pulse of current is then passed through a secondary winding on the transformer. The signal across the secondary winding produced in response to the test pulse current indicates the closed or opened condition of the contacts.
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公开(公告)号：DE3016287A1
公开(公告)日：1980-11-06
申请号：DE3016287
申请日：1980-04-28
Applicant: ELECTRONICS CORP AMERICA
Inventor： WEINER NATHAN K , KETCHUM DAVID D
Abstract: An interface circuit for indicating the state of a set of switch contacts having high noise immunity and high reliability. The switch contacts to be monitored are connected in series with the primary winding of a transformer having a magnetic core with a highly rectangular hysteresis loop. A voltage is periodically applied through the switch to the transformer primary. A test pulse of current is then passed through a secondary winding on the transformer. The signal across the secondary winding produced in response to the test pulse current indicates the closed or opened condition of the contacts.
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