Device for controlling continuity of printed circuits

Details Device for controlling continuity of printed circuits Device for controlling continuity of printed circuits

1984-05-22

1987-02-10

Karlsen, Ernest F.

Electricity: measuring and testing

Plural, automatically sequential tests

324158F, G01R 1512, G01R 3128

Patent

active

046425608

ABSTRACT:
The device according to the invention is intended for controlling the electrical continuity of the equipotential branchings of multi-layer printed circuits. It comprises selectors of a model of printed circuit to be controlled in order to effect, by superposition with the latter, the selection from the assembly E of the conductor elements accessible on at least one of the outer faces of the circuit, of two distinct sub-assemblies Ei and Ec, such that E=Ei+Ec; means for scanning said selectors in order to effect, by displacements in contact with the latter, detection of the defects in continuity; and indicators for translating the state of the electrical continuity in the branchings.

REFERENCES:
patent: 3830956 (1974-08-01), Wootton et al.
patent: 4012693 (1977-03-01), Sullivan
patent: 4056773 (1977-11-01), Sullivan
patent: 4565966 (1986-01-01), Burr et al.
IBM Technical Disclosure Bulletin, vol. 22, No. 7, Dec. '79, pp. 2704-2705, New York, US, L.M. Zobniw--"Orthogonal Shorts Detector."
IBM Technical Disclosure Bulletin, vol. 26, No. 5, Oct. '83, pp. 2594-2595, New York, US; A. H. Kumar et al--"Liquid Crystal Electrical Continuity Tester".
Patents Abstracts of Japan, vol. 7, No. 15, pp. 169 (1160), 1983; and JP-A-57 172 260 (Hitachi Densen K.K.) 23-10-1982.
IBM Technical Disclosure Bulletin, vol. 12, No. 5, Oct. '69, pp. 655-656, New York, US; P. M. Degroat et al--"Finding Shorts in Printed Circuit Boards".

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