Geometrical instruments – Gauge – Tooth testing
Reexamination Certificate
2005-04-05
2005-04-05
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Gauge
Tooth testing
C033S501160, C033S501700
Reexamination Certificate
active
06874241
ABSTRACT:
Measuring means for determining measurement error factors of a measuring machine, which measures toothing tolerances of gearwheels by inserting two gauging balls in different tooth gaps of a gearwheel and then taking measurements from the positions of the inserted balls, comprises a reference master having two first helically extending grooves disposed on an external or internal circumference of the master and representing tooth gaps receiving the two gauging balls to permit simulated measurements applicable to an externally or internally helically toothed gearwheel with an even number of teeth and two second helically extending grooves disposed on the same circumference as the first grooves and representing tooth gaps for respectively receiving the two balls to permit simulated measurements applicable to an externally or internally helically toothed gearwheel with an uneven number of teeth. The first grooves extend in a first helix direction and are arranged diametrically opposite one another, whereas the second grooves extend in a second helix direction opposite to the first helix direction and are arranged on opposite sides of the circumference on two diameters which include an angle equal to half the pitch of the teeth of the uneven number.
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Frenco GmbH
Fulton Christopher W.
Reis Travis
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