| 摘要 |
A compact positioning mechanism for an indicator assembly of the type comprising first and second bar members arranged in a V-like configuration and collectively defining a command plane which is both rotatable about and transversely displaceable with respect to a reference axis. A pair of ring members, each formed with a camming surface, carry the respective bar members on a cam follower pivotably mounted on one ring and in camming engagement with the cam surface on the other. Rotation of the command plane is achieved through like rotation of the two rings while displacement transverse of the reference axis is achieved by relative rotation between the two rings.
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