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Ultrasonic leak detection apparatus which includes a cycloidal transfer mechanism for sequentially feeding a plurality of workpieces to a test station. An elevator at the test station alternately lifts workpieces in sequence to an elevated position to a test chamber and lowers workpieces from the te

Ultrasonic leak detection apparatus which includes a cycloidal transfer mechanism for sequentially feeding a plurality of workpieces to a test station. An elevator at the test station alternately lifts workpieces in sequence to an elevated position to a test chamber and lowers workpieces from the test chamber to the transfer mechanism. An enclosure cooperates with the elevator to form the test chamber in which the workpiece is pressurized and microphones detect any leakage of air through cracks or the like. A reject station downstream of the test station includes facility for removing defective workpieces from the transfer line.

대표청구항 ▼

Ultrasonic leak test apparatus comprising transfer means for sequentially feeding a plurality of workpieces to a test station, elevator means at said test station for alternately lifting workpieces in sequence from said transfer means to an elevated position and lowering workpieces onto said transfe

Ultrasonic leak test apparatus comprising transfer means for sequentially feeding a plurality of workpieces to a test station, elevator means at said test station for alternately lifting workpieces in sequence from said transfer means to an elevated position and lowering workpieces onto said transfer means in a lowered position, means cooperating with a said elevator means at said test station in said elevated position of said elevator means for forming a sound chamber enclosing a workpiece on said elevator means, air supply means for selectively feeding air under pressure into a workpiece enclosed in said chamber, and means for ultrasonically detecting air leakage from within the workpiece, said sequentially-feeding means comprising a transfer line including support means defining a transfer plane, transfer means positioned on opposed sides of said support means for selectively engaging and disengaging workpieces on said support means, and indexing means coupled to said transfer means for selectively indexing said transfer means for moving workpieces sequentially along said support means onto said elevator means, characterized in that said transfer means comprises a base, first and second arrays of carriers positioned in pairs on opposed sides of said support means, means pivotally mounting each said array to said base for conjoint motion toward and away from the opposing array, and means coupled to said first and second arrays of carriers positioned for engagement with said elevator means in said lowered position for pivoting said carrier arrays toward said support means for engaging workpieces carried on said support means and on said elevator means, and in that said indexing means comprises means mounting both said ar to said base for conjoint motion parallel to said arrays.