Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2000-07-03
2001-12-11
Lee, John R. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S205000, C250S2140LS, C250S227110, C250S227220, C345S161000
Reexamination Certificate
active
06329647
ABSTRACT:
BACKGROUND
This invention relates generally to improved methods, devices and system for fibre optic control in joysticks for controlling the operation of various types of electronic or electromechanical equipment. More particularly it relates to an electronic compensation reference circuit for fiber optic joystick controller.
PRIOR ART
The problem with opto-mechanical justice controllers such as U.S. Pat. Nos. 4,459,022, 4,686,361 and 4,731,530 is that due to aging, wear and tear and dirt etc the magnitude of incident and reflected light varies and is not a faithful measure of the position of the joystick. An electronic compensation reference circuit of this invention eliminates this problem.
Unfortunately prior art devices singly or even in combination do not provide all of the features and objectives established by the inventor for this system as enumerated below.
OBJECTIVES
1. It is an objective of this invention to provide method, devices and system for fibre optic control in joysticks for controlling the operation of various types of electronic or electromechanical equipment.
2. Another objective of this invention is to provide a circuit which automatically compensates for variations in incident and reflected light due to again, wear and tear, dirt and grease on mirrors, changes due to ambient temperature of the environment or vibrations etc.
3. Another objective of this invention is to provide a compensation reference circuit which makes the joystick immune to electromagnetic radiation or other interferences.
4. Another objective of the circuit of this invention is to regulate the light source for each axis of the optical joystick.
5. Another objective of the circuit of this invention is to process the corresponding light that is reflected back by the joystick mirror
6. Another objective of the invention is to provide a novel and improved fiber-optic joystick control having relatively few components which can be economically fabricated and assembled so as to produce a very low cost control unit.
7. Another objective of the invention is to provide an improved fiber optic control device of the type above set forth, which is especially reliable and fool-proof in its operation.
8. Another objective of the invention is to provide an improved fiber optic/joystick control device as outlined above, which is especially small and compact, requiring but little space in addition to that required by prior art joystick.
9. Another objective of this invention is to provide positive mechanical drive or control from the joystick lever to the movable mirrors of the device.
10. Another objective of this invention is that it use little or no additional power or energy.
11. Another objective of this invention is that it is easy to use even intuitive that requires little additional training.
12. Another objective of this invention is that it be made of modular units easily interface-able to each other.
13. Another objective of this invention is that it meet all federal, state, local and other private standards, guidelines and recommendations with respect to safety, environment, quality and energy consumption.
14. Another objective of this invention is that it be elegantly simple in concept and design.
15. Another objective of this invention is that it be capable of mass production with easy of assembly, service, storage and transportation.
16. Another objective of this invention is that it be ergonomic, colorful and aesthetic.
Other objectives of this invention reside in its simplicity, elegance of design, ease of manufacture, service and use and even aesthetics as will become apparent from the following brief description of the drawings and concomitant description.
REFERENCES:
patent: 4250488 (1981-02-01), Haupt
patent: 4459022 (1984-07-01), Morey
patent: 4686361 (1987-08-01), Bard
patent: 4731530 (1988-03-01), Mikan
patent: 5225831 (1993-07-01), Osborn
patent: 5558329 (1996-09-01), Liu
patent: 5621207 (1997-04-01), O'Mara
patent: 5884125 (1999-03-01), Taniguchi et al.
patent: 6130424 (2000-10-01), Mikan
patent: 6222179 (2001-04-01), Mikan
patent: 6246047 (2001-06-01), Mikan
Asija Our Pal
Lee John R.
LandOfFree
Compensation reference circuit for opto-mechanical joystick does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation reference circuit for opto-mechanical joystick, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation reference circuit for opto-mechanical joystick will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2582453