Short circuit diagnostic tool

Details Short circuit diagnostic tool Short circuit diagnostic tool

2006-04-18

2006-04-18

Gartenberg, Ehud (Department: 3742)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

C219S504000, C324S525000

Reexamination Certificate

active

07031132

ABSTRACT:
A device and method for diagnosing shorts and fault conditions in electrical circuits such as heating, ventilation, and air conditioning (HVAC) control circuits. The device includes a positive temperature coefficient (PTC) member to protect the electrical circuit from overcurrent conditions during diagnosis. The device also includes a light emitting diode (LED) and resistor electrically connected in parallel across the PTC member. An overcurrent condition causes the resistance of the PTC member to rise dramatically, creating a potential difference across the PTC member and lighting the LED. The invention also includes a method for locating a short in an HVAC control circuit using the short locating device.

REFERENCES:
patent: 3152259 (1964-10-01), Heine
patent: 3689736 (1972-09-01), Meyer
patent: RE28656 (1975-12-01), Crowley et al.
patent: 4023136 (1977-05-01), Lamensdorf et al.
patent: 4074335 (1978-02-01), Takasugi
patent: 4353026 (1982-10-01), Edwards, Jr.
patent: 4371910 (1983-02-01), Bube et al.
patent: 4408244 (1983-10-01), Weible
patent: 4670729 (1987-06-01), Oh
patent: 4682140 (1987-07-01), Diaz-Noriega
patent: 4782240 (1988-11-01), Davidson
patent: 4890181 (1989-12-01), Nerowski et al.
patent: 5008613 (1991-04-01), Steinel et al.
patent: 5463322 (1995-10-01), Kwasnick et al.
patent: 5476497 (1995-12-01), Mower et al.
patent: 5543705 (1996-08-01), Uezono et al.
patent: 5590011 (1996-12-01), Hein
patent: 5606483 (1997-02-01), Sawai et al.
patent: 5645746 (1997-07-01), Walsh
patent: 5877631 (1999-03-01), Takahashi
patent: 6075689 (2000-06-01), Mitchell
patent: 6252409 (2001-06-01), Iijima
patent: 6512444 (2003-01-01), Morris et al.
patent: 2842859 (1980-04-01), None
patent: 19504092 (1995-08-01), None
patent: 29717260 (1997-11-01), None
patent: 09261842 (1997-10-01), None
patent: 02000197261 (1998-12-01), None
patent: WO 00/48012 (2000-08-01), None

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