Shake table testing apparatus and associated electrical system for testing the electrical characteristics of circuit boards, logic cards, and the like

Claim 1

APPARATUS FOR TESTING CIRCUITRY AND COMPONENTS SUPPORTED ON EACH OF A MULTIPLICITY OF CIRCUIT BOARDS, AND THE LIKE, INCLUDING: A SHAKE TABLE FIXTURE FOR SUPPORTING A CIRCUIT BOARD TO BE TESTED, MEANS COUPLED TO THE SHAKE TABLE FIXTURE FOR IMPARTING MOTION THERETO, SO AS TO SUBJECT THE CIRCUIT BOARD SUPPORTED THEREBY TO A MOVING ACTION, INPUT TEST NETWORK MEANS FOR INTRODUCING INPUT SIGNALS TO THE CIRCUITRY OF THE CIRCUIT BOARD SUPPORTED ON SAID SHAKE TABLE FIXTURE, RECORD READING AND SIGNAL REPRODUCING MEANS FOR READING A RECORD OF PARTICULAR INPUT TEST SIGNALS FOR THE CIRCUIT BOARD SUPPORTED ON SAID SHAKE TABLE FIXTURE AND FOR DERIVING A PATTERN OF INPUT TEST SIGNALS FROM SAID RECORD AND BEING COUPLED TO THE INPUT TEST NETWORK MEANS FOR INTRODUCING THE PATTERN OF INPUT SIGNALS TO SAID INPUT TEST NETWORK MEANS, ERROR-DETECTOR NETWORK MEANS FOR RECEIVING OUTPUT SIGNALS FROM THE CIRCUITRY OF THE CIRCUIT BOARD SUPPORTED ON SAID SHAKE TABLE FIXTURE AND FOR COMPARING THE SAME WITH PARTICULAR INPUT TEST SIGNALS FROM INPUT TEST NETWORK MEANS, INDICATOR MEANS COUPLED TO SAID ERROR DETECTOR CIRCUIT MEANS FOR INDICATING MALFUNCTIONS IN THE CIRCUITRY AND COMPONENTS OF THE CIRCUIT BOARD SUPPORTED ON SAID SHAKE TABLE FIXTURE, AND MEANS INCLUDING ELECTRICAL CABLE MEANS FOR CONNECTING THE CIRCUITRY ON THE CIRCUIT BOARD SUPPORTED ON SAID SHAKE TABLE FIXTURE TO SAID INPUT TEST NETWORK MEANS AND TO SAID ERROR DETECTOR NETWORK MEANS.