Title: Apparatus and process for testing printed circuits

Abstract: A printed circuit having a protective coating of lacquer or the like thereover is tested by bringing a plurality of resiliently mounted measuring pins into engagement with certain measuring points on the printed circuit. The printed circuit is then subjected to ultrasonic vibrations to cause the contacting pins to be impacted into good electrical contact with the measuring points on the printed circuit. The pins are resiliently mounted for axial movement in opposed openings in a pair of spaced plates and the plate and pin assembly is capable of being moved toward and away from the printed circuit.

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Inventors: Luther, Erich (Hannover-Ihme, DT)

Application Number: 499904
Filing Date: 1974-08-23
Publication_date: 1976-12-07
Assignee: LM-Electronic Luther & Maelzer (Hannover-Ihme, DT)
Primary Class(es): 324/761 324/72.5, 324/754
Other Classes:
US Patent Ref:

2918648	Dec, 1959	Ludman et al.	324/158.
3453545	Jul, 1969	Oates	324/72.
3500192	Mar, 1970	Donaher et al.	324/72.

Other Refs:
Primary Examiner: Rolinec, R. V.
Assistant Examiner: Karlsen, Ernest F.
Attorney: Jaskiewicz; Edmund M.