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US 5,471,260 AGranted
Joystick for an ophthalmic instrument where vertical movement is controlled by rotating the joystick
AssigneeLeica Inc.
InventorsDavid A. Luce, Joseph L. Zelvin
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a joystick for positioning a test axis of an ophthalmic instrument relative to an eye of a patient. In a preferred embodiment, the joystick includes an actuator extending therefrom and arranged to alternately engage a pair of motor control switches incident to slight rotation of the joystick in opposite directions, thereby activating a motor drive to raise and lower the test axis.
Claims8
An improved ophthalmic instrument having optical means for testing an eye of a patient comprising:
- a frame;
- a support for said optical means connected to said frame;
- a motor for moving said support in either vertical direction, said motor being responsive to a switch means;
- lever means for controlling movement of said support in three dimensions, said lever means being tilted for horizontal movement of said support and rotated for vertical movement of said support;
- and an actuator connected to said lever means and being positioned to operatively engage said switch means upon rotation of said lever in either direction, whereby vertical movement is controlled by rotation of said lever and is independent of the amount of rotation.
2 more elements
Dependencies are inferred from the claim text.