Method and apparatus to detect and locate damage and...

Details Method and apparatus to detect and locate damage and... Method and apparatus to detect and locate damage and...

2007-12-03

2009-06-30

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S522000, C324S071100, C340S605000

Reexamination Certificate

active

07554345

ABSTRACT:
A leak in a membrane on top of a horizontal roof deck is located by a manually operable carriage which is swept over the upper surface of the membrane on the roof deck. A measuring and switching circuit generates a voltage having a positive attached to the roof deck and a negative attached to conductive brushes on the carriage. The brushes are arranged to form an outer peripheral contact with an inner contact inside the outer contact. Thus the presence of a leak is detected by the outer set of conductive brushes at distance from the leak and by the inner conductive brush when directly over the leakage site.

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