The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 1987
Filed:
Mar. 21, 1986
Harry S Coffin, King of Prussia, PA (US);
Other;
Abstract
A two level test device for testing printed circuit boards is disclosed, including a housing defining an open chamber and a support platform displaceably connected with the housing for closing the chamber and for supporting the circuit board to be tested. A vacuum device is connected with the housing for creating a negative pressure within the chamber to displace the platform from a first rest position to second and third test positions. In the platform second position, the circuit board contacts the terminal of a test pin for functional testing of the board and in the platform third position, the circuit board contacts the terminals of a pair of test pins for in-circuit testing of the circuit board. The test device is characterized by a stop plate for arresting displacement of the platform in its second and third positions. The stop plate includes a plurality of projections and the housing bottom wall contains a plurality of recesses corresponding with the projections. When the stop plate is in a first position, the projections engage the upper surface of the housing bottom wall to stop the platform displacement in its second position. When the stop plate is laterally shifted to a second position, the projections enter the corresponding recesses and the lower surface of the stop plate abuts against the upper surface of the housing bottom wall to stop the platform displacement in its third position. A piston/cylinder assembly shifts the stop plate between the first and second positions.