Force and torque converter

• US 5,222,400 A
• Filed: 10/25/1989
• Issued: 06/29/1993
• Est. Priority Date: 12/18/1985
• Status: Expired due to Term

• Current Assignee: Labtec, Inc. (Logitech International SA)
• Original Assignee: Spaceball Technologies, Inc.
• Inventors: Hilton, John A.
• Primary Examiner(s): Razavi, Michael T.
• Assistant Examiner(s): DOUGHERTY, ELIZABETH L
• Application Number:
  US07/427,931
• Time in Patent Office: 1,343 Days
• Field of Search: 73/862.04, 73/862.05, 73/862.041, 73/862.042, 73/862.043, 74/471 XY, 250/221
• US Class Current: 73/862.043
• CPC Class Codes: G01L 1/248 using infrared G01L1/241, G01L1/242 take precedence
• CPC Class Codes: G01L 5/1627 of strain gauges using piezoresistors G01L5/162
• CPC Class Codes: G01L 5/166 using photoelectric means
• CPC Class Codes: G01L 5/223 to joystick controls
• CPC Class Codes: G06F 3/03543 Mice or pucks G06F3/03541 takes precedence
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: H01H 2239/052 Strain gauge
• CPC Class Codes: Y10T 74/20201 Control moves in two planes

Abstract

A force and torque converter provides command signals representative of a translational applied force and an applied torque extending about an axis substantially perpendicular to the axis along which the translational force is applied. The apparatus comprises a body to which the force and torque are applied, first and second connecting means attached to the body, means for biasing the connecting means to a central position and sensor means comprising two sensor devices arranged to detect a displacement force in each of the first and second connecting means respectively and which respond to the applied translation force and also respond to the torque to resolve the torque into a force comprising two components. A very important embodiment of the invention is arranged to operate in three dimensions and to resolve any applied torque into a respective components related to three mutually perpendicular axes. The apparatus can thus interpret operator applied hand signals for controlling an apparatus such as a computer based system.

Claims

1. An apparatus for providing output signals for use as command signals with respect to X, Y, and Z mutually orthogonal axes, the signals being representative of a translational applied force and an applied torque, the apparatus comprising a base, a body to which the forces and torque are applied, resilient connecting means attached to the body and mounting the body for receiving force in any direction and toque about any axis and for urging the body to be displaced relative to the base, a plurality of sensor means capable of providing a set of signals representative of the applied translational force and the applied torque, wherein the base has a stem for mounting the apparatus, and wherein each of the sensor means is mounted and uniformly disposed about an axis of detection, the locus of sensor positions is on a sphere, each sensor means comprising a light emitting means, a light detecting means, and a light interfering means, wherein the light reaching the light detecting means of at least one or more of the sensor means is selectively varied by the light interfering means in response to movement of the body.

2. An apparatus for providing output signals for use as command signals with respect to X, Y and Z mutually orthogonal axes, the signals being representative of a translational applied force and an applied torque, the apparatus comprising a base, a body to which the forces and torques are applied, resilient connecting means attached to the body and mounting the body for receiving force in any direction and torque about an axis and for urging the body to be displaced relative to the base, a plurality of sensor means capable of providing a set of signals representative of the applied translational force and the applied torque, wherein the base has a stem for mounting the apparatus, the body as having generally the shape of a hollow sphere and encompassing both the resilient connecting means and the sensor means, a hole being provided n the hollow sphere for receiving the stem, and wherein each of the sensor means is mounted and uniformly disposed about an axis of detection, each sensor means comprising a light emitting means, a light detecting means and a light interfering means, wherein the light reaching the light detecting means of at least one or more of the sensor means is selectively varied by the light interfering means in response to movement of the body.

3. An apparatus for providing output signals for use as command signals with respect to X, Y and Z mutually orthogonal axes, the signals being representative of a translational applied force and an applied torque, the apparatus comprising of base, a body to which the forces and torques are applied, resilient connecting means attached to the body and mounting the body for receiving force in any direction and torque about an axis and for urging the body to be displaced relative to the base, a plurality of sensor means capable of providing a set of signals representative of the applied translational force and the applied torque, the base having a stem for mounting the apparatus, and wherein each of the sensor means is mounted and uniformly disposed about an axis of detection, the locus of sensor positions being on a sphere, the body having generally the shape of a hollow sphere and encompassing both the resilient connecting means and the sensor means, and wherein a hole is provided in the hollow sphere for receiving the stem, each sensor means comprising a light emitting means, a light detecting means and a light interfering means, wherein the light reaching the light detecting means of at least one or more of the sensor means is selectively varied by the light interfering means in response to movement of the body.