G - Physics – 08 – C
Patent
G - Physics
08
C
340/135
G08C 21/00 (2006.01) B23Q 35/32 (2006.01) G01B 7/00 (2006.01) G01B 7/012 (2006.01)
Patent
CA 1211530
ABSTRACT OF THE INVENTION An apparatus for use in determining the location of a surface of a solid object such as that being machined by a machine tool includes a stylus having an electrically conductive end that is supported by two support members, which are disposed in pressure contact with each-other by means of a spring or other bias, one of the two support members being formed to have a spherical contact surface that is a portion of an imaginary sphere concentric with the contact electrode, the other of the two support members being formed so that upon contacting the spherical surface the area of contact is substantially line contact. Either alternatively or in addition to the detection of a electrically conductive surface with the contact electrode, the support members may be provided with electrically conductive surfaces to that upon the contact of the electrode contact with a workpiece the electrically conductive surfaces are moved out of electrical contact, thereby providing an additional indication of the position of the surface to be determined.
422804
Narimatsu Akihisa
Suzuki Nobuyuki
Yonemoto Hiroshi
Gowling Lafleur Henderson Llp
Sony Magnescale Incorporation
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