Piezoelectric transducer sensor for use in a press

Details Piezoelectric transducer sensor for use in a press Piezoelectric transducer sensor for use in a press

1969-05-12

1977-03-08

Wilhite, Billy J.

Presses

Portable receptacle lid applying

With gathering of contents

72 26, 73 885R, 100 99, 192129A, 192150, 310 81, B30B 1528

Patent

active

040106799

ABSTRACT:
A piezoelectric transducer is positioned on a member of a power press subject to stress under dynamic conditions. A ball joint bracket means fixes and maintains the transducer on the member parallel with the direction of force and with the faces of the piezoelectric ceramic plate perpendicular thereto. The high voltage signal generated by the transducer is transmitted to a signal conditioning circuit and impressed upon the grid of a grid-controlled vacuum tube. If the conditioned signal is sufficient to overcome the biasing grid voltage, it activates an electric circuit for the performance of one or more functions, including stopping the power press in the case of an overload, counting the number of times the press is overloaded or the number of times a workpiece is produced, and measuring the press load during a work cycle.

REFERENCES:
patent: 2864125 (1958-12-01), Kelley
patent: 2890778 (1959-06-01), Braun et al.
patent: 2937734 (1960-05-01), Sommer
patent: 3130329 (1964-04-01), Cother
patent: 3426873 (1969-02-01), Tezuka
patent: 3444390 (1969-05-01), Breidenbach et al.

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