Displacement transducer to identify the position of a pressing plunger
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United States of America Patent
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Jul 1, 1997
Grant Date -
N/A
app pub date -
Jan 27, 1995
filing date -
May 27, 1993
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Abstract
A piston rod (2) of a piston-cylinder unit (3) carries at the top a pressing plunger (not shown) of a glass forming machine and is guided in a guide sleeve (22). The guide sleeve (22) is seated in a magnetically conductive support sleeve (20) of a retaining flange (14). The support sleeve (20) carries an external coil (27) whose connecting wires (30) are guided outwardly to a plug socket (37). On the top of the piston (6) is fixed an internal flange (39) of a circular annular metallic actuating member (40). At the uppermost end of the pressing stroke of the piston (6) the actuating member (40) enters into an annular chamber (29) around the coil (27) and thereby changes the inductance of the coil.
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