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US 4,361,288 AGranted
Rotating speed detecting device of a rotary type electrostatic spray painting device
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsDaiki Fukuda, Teru Morishita, Toshikazu Suzuki
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Abstract
A rotating speed detecting device of a rotary type electrostatic spray painting device comprising an annular permanent magnet fixed onto the rotary shaft of the spray painting device, and a detecting head mounted on the housing of the spray painting device. The detecting head has an induction coil enclosed by electrically insulating material.
Claims6
A rotating speed detecting device for a rotary-type electrostatic spray painting device having a housing and a rotary shaft arranged in the housing, the detecting device further comprising:
- an annular member fixed on the rotary shaft and having an annular groove formed therein, said annular groove being arranged concentrically about an axis of rotation of the rotary shaft;
- an annular permanent magnet fixed into said annular groove and arranged concentrically about said axis of rotation of the rotary shaft;
- and
- a detecting head mounted on the housing and arranged to be radially spaced from said annular permanent magnet, said detecting head having a cylindrical body made of an insulating material, said cylindrical body having embedded therein an induction coil, enclosed by said electrically insulating material, for producing an output signal representing the speed of rotation of the rotary shaft.
1 more element
Dependencies are inferred from the claim text.