Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-08-02
2005-08-02
Wu, Daniel (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S649000, C340S650000, C340S652000
Reexamination Certificate
active
06924740
ABSTRACT:
A device for indicating whether a conductive element has an electrical resistance equal to or less than a predetermined value or whether the conductive element is reliably connected to earth reference potential by a resistance equal to or less than a predetermined value. The device includes a clamp device for connecting the device to the conductive element and which incorporates a battery powered monitoring unit. The monitoring unit includes a current-to-voltage converter with a voltage output that is inversely proportional to the resistance of the conductive element, a comparator which compares at predetermined intervals voltage output to a pre-set reference and determines whether the measured resistance is equal or less than the predetermined value, and a signaling device which is actuated to provide an indication as to whether the measured resistance is equal to or less than the predetermined value.
REFERENCES:
patent: 3343154 (1967-09-01), Seesselberg
patent: 3641473 (1972-02-01), Attaway
patent: 4558309 (1985-12-01), Antonevich
patent: 4649374 (1987-03-01), Hoigaard
patent: 4656327 (1987-04-01), Wilcox
patent: 4742295 (1988-05-01), Nahman et al.
patent: 4901195 (1990-02-01), Stemporzewski, Jr.
patent: 5034726 (1991-07-01), Blondin
patent: 5113303 (1992-05-01), Herres
patent: 5159523 (1992-10-01), Claassen et al.
patent: 5686897 (1997-11-01), Loh
patent: 5772468 (1998-06-01), Kowalski et al.
patent: 5909181 (1999-06-01), Golzmane
patent: 0 534 702 (1993-03-01), None
patent: 2 342 455 (2000-04-01), None
Newson Gale Limited
Nixon & Peabody LLP
Tang Son
Wu Daniel
LandOfFree
Electrical resistance monitoring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical resistance monitoring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical resistance monitoring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3497511