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 Title: |
US4886941:
Circuit for interfacing mouse input device to computer system
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Davis, Hedley; Middletown, DE
Raible, Robert; West Chester, PA
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| Assignee: |
Commodore Business Machines, Inc., West Chester, PA
other patents from COMMODORE BUSINESS MACHINES INC. (113505) (approx. 17)
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| Published / Filed: |
1989-12-12
/ 1987-05-19
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| Application Number: |
US1987000051451
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| IPC Code: |
Advanced:
G06F 3/033;
G06F 3/038;
Core:
more...
IPC-7:
G08C 21/00;
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| ECLA Code: |
G06F3/038; G06F3/038E;
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| U.S. Class: |
Current:
178/019.01;
345/163;
Original:
178/018;
340/710;
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| Field of Search: |
178/018,19
340/709,710
382/003,13,59
250/231 SE
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| Priority Number: |
| 1987-05-19 |
US1987000051451 |
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| Abstract: |
A computer system mouse-type input device. Movements of a track-ball motion sensor are converted to quadrature signals and are accumulated in a counting circuit. The contents of the counter are pulse-position modulated with waveforms characteristic of a resistive-capacitive charging circuit and are read periodically by a computer input channel normally used for input of potentiometer-generated commands. The pulse-position modulated signals are converted to digital values used by the computer to position the cursor on a display screen.
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| Attorney, Agent or Firm: |
Finnegan, Henderson, Farabow, Garrett & Dunner ;
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| Primary / Asst. Examiners: |
Schreyer, Stafford D.;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE ES FR GB SE
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| Family: |
Show 14 known family members
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First Claim:
Show all 8 claims |
What is claimed is:
1. A mouse-type input device for connection to a computer having a timing means for generating a succession of time cycles and a sensing means for sensing the time of occurrence of a predetermined voltage during each of the time cycles, said input device comprising:
- (a) motion sensor means responsive to the travel of said input device operative to generate a succession of electrical signals having characteristics corresponding to the distance and direction of travel of said input device;
- (b) interface means responsive to said succession of electrical signals for generating during each of the succession of time cycles a first pulse of predetermined voltage having a time of occurrence in a respective time cycle corresponding to the characteristics of said electrical signals; and
- (c) coupling means for receiving said succession of time cycles from the computer and for transmitting corresponding ones of said first pulses in succession.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 18 U.S. patent(s) that reference this one
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