Method of and device for sensing the presence or absence of an article at the end of a vacuum pick-up means
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United States of America Patent
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Aug 4, 1987
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N/A
app pub date -
Apr 14, 1986
filing date -
Apr 13, 1982
priority date (Note) -
Expired
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Abstract
A method of and a device for sensing the presence or absence of an electrical or electronic component at the end of a vacuum pick-up means. In the absence of a component, the air flow produced by the vacuum is converted into an acoustic signal which indicates the absence of the component.
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