Positive-positioning knob assembly

Details Positive-positioning knob assembly Positive-positioning knob assembly

G - Physics

05

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G05G 5/18 (2006.01) G05G 1/08 (2006.01) G05G 1/10 (2006.01) G05G 5/12 (2006.01) H01H 3/20 (2006.01)

Patent

CA 1322303

Abstract of the Disclosure A positive-positioning knob assembly comprises a knob body having a substantially hollow interior portion and a pinion member non-rotatably mounted relative to a shaft to be rotated by the knob assembly. Cooperating selectively interengageable and disengageable locking members are located on the pinion member and the hollow body interior respectively for alternatively permitting the body to rotate freely of the pinion member when the locking members are in a disengaged condition, and for locking the body non-rotatably relative to the pinion when the locking members are in an engaged condition. A resilient biasing member normally holds the locking members in the engaged condition to prevent rotation of the knob body; however, the resilient biasing member is resiliently deformable for permitting the locking members to move to the disengaged condition to permit rotation of the knob body.

550681

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