IN152681B - - Google Patents
Info
- Publication number
- IN152681B IN152681B IN894/CAL/80A IN894CA1980A IN152681B IN 152681 B IN152681 B IN 152681B IN 894CA1980 A IN894CA1980 A IN 894CA1980A IN 152681 B IN152681 B IN 152681B
- Authority
- IN
- India
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
- H03K17/943—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector using a plurality of optical emitters or detectors, e.g. keyboard
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/075,396 US4278965A (en) | 1979-09-14 | 1979-09-14 | Photo-optical keyboard having n-key rollover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IN152681B true IN152681B (OSRAM) | 1984-03-10 |
Family
ID=22125448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IN894/CAL/80A IN152681B (OSRAM) | 1979-09-14 | 1980-08-05 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4278965A (OSRAM) |
| EP (1) | EP0038803A1 (OSRAM) |
| IN (1) | IN152681B (OSRAM) |
| WO (1) | WO1981000773A1 (OSRAM) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986001954A1 (fr) * | 1984-09-07 | 1986-03-27 | Alain Souloumiac | Clavier optique |
| HU191736B (en) * | 1984-12-21 | 1987-04-28 | Peter Ozorai | Method and optoelectronic keyboard for generating input signals of electronic apparatuses |
| FR2576433A1 (fr) * | 1985-01-24 | 1986-07-25 | Souloumiac Alain | Clavier optique pour ordinateur |
| US5066856A (en) * | 1990-03-23 | 1991-11-19 | Optoswitch, Inc. | Optical micro-switch apparatus |
| DE4109517A1 (de) * | 1991-03-22 | 1992-09-24 | Holger Guenther Dr Frenzel | Tastatur |
| US5357104A (en) * | 1993-06-23 | 1994-10-18 | Williams Electronics Games, Inc. | Opto-leaf switch for pinball games having an interrupter means mounted on a leaf spring actuator arm |
| US5729754A (en) * | 1994-03-28 | 1998-03-17 | Estes; Mark D. | Associative network method and apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3465099A (en) * | 1967-09-05 | 1969-09-02 | Friden Inc | Optical encoder |
| US3579047A (en) * | 1968-02-13 | 1971-05-18 | Diehl Fa | Keyboard using switches having light obstructing elements |
| US3614315A (en) * | 1968-08-26 | 1971-10-19 | Teletype Corp | Character repeat circuit |
| US3668407A (en) * | 1970-05-28 | 1972-06-06 | Texas Instruments Inc | Optical switching for keyboard encoder |
| US3648050A (en) * | 1970-08-06 | 1972-03-07 | Tuh Kai Koo | Optoelectronic data entry means having plurality of control means to direct part of radiation in channel from radiation source to output channel |
| US3796880A (en) * | 1972-10-10 | 1974-03-12 | Solartron Electronic Group | Keyboard having double key detector |
-
1979
- 1979-09-14 US US06/075,396 patent/US4278965A/en not_active Expired - Lifetime
-
1980
- 1980-07-21 WO PCT/US1980/000930 patent/WO1981000773A1/en not_active Ceased
- 1980-08-05 IN IN894/CAL/80A patent/IN152681B/en unknown
-
1981
- 1981-03-23 EP EP80901819A patent/EP0038803A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0038803A1 (en) | 1981-11-04 |
| US4278965A (en) | 1981-07-14 |
| WO1981000773A1 (en) | 1981-03-19 |