ZA74784B - Electronic keyboard - Google Patents

Electronic keyboard

Info

Publication number: ZA74784B
Authority: ZA; South Africa
Prior art keywords: electronic keyboard; keyboard; electronic
Prior art date: 1973-03-09

Application number

ZA740784A

Other languages

English (en)

Inventor

D Colglazier

W Larson

Original Assignee

Magic Dot Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-03-09

Filing date

1974-02-06

Publication date

1974-12-24

1974-02-06 Application filed by Magic Dot Inc filed Critical Magic Dot Inc

1974-12-24 Publication of ZA74784B publication Critical patent/ZA74784B/xx

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
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
- H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
- 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
- H03K17/96—Touch switches
- H03K2017/9602—Touch switches characterised by the type or shape of the sensing electrodes
- H03K2017/9604—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes
- H03K2017/9613—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes using two electrodes per touch switch

ZA740784A 1973-03-09 1974-02-06 Electronic keyboard ZA74784B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US339524A US3877029A (en)	1973-03-09	1973-03-09	Electronic keyboard

Publications (1)

Publication Number	Publication Date
ZA74784B true ZA74784B (en)	1974-12-24

Family

ID=23329411

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ZA740784A ZA74784B (en)	1973-03-09	1974-02-06	Electronic keyboard

Country Status (10)

Country	Link
US (1)	US3877029A (it)
JP (1)	JPS49127527A (it)
CA (1)	CA1001955A (it)
CH (1)	CH591115A5 (it)
DE (1)	DE2409615A1 (it)
FR (1)	FR2220832B1 (it)
GB (1)	GB1457572A (it)
IL (1)	IL44192A (it)
IT (1)	IT1009249B (it)
ZA (1)	ZA74784B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4037200A (en) *	1974-10-16	1977-07-19	Cranmer Terrence V	Braille display switching matrix and circuit utilizing the same
US4055755A (en) *	1975-04-16	1977-10-25	Sharp Kabushiki Kaisha	Switching assembly in combination wristwatch and calculator
JPS5257856A (en) *	1975-11-07	1977-05-12	Seiko Epson Corp	Electronic wristwatch
DE2607948C3 (de) *	1976-02-27	1979-07-19	Kober Ag, Glarus (Schweiz)	Verfahren zur Herstellung eines Fugenrandkörpers für Dehnungsfugen in Verkehrswegen und Mehrfachprofil zur Durchführung des Verfahrens
US4139837A (en) *	1977-06-22	1979-02-13	Creative Ventures, Inc.	Information entry system
JPS579093A (en) *	1980-06-17	1982-01-18	Matsushita Electric Industrial Co Ltd	Induction heating cooking device
EP0072784A3 (en) *	1981-08-19	1983-10-19	General Instrument Corporation	Circuit board for use in capacitive keyboard
GB2232251A (en) *	1989-05-08	1990-12-05	Philips Electronic Associated	Touch sensor array systems
US5241695A (en) *	1991-11-26	1993-08-31	Motorola, Inc.	Molded shield with integral key switch circuitry
GB9211035D0 (en) *	1992-05-22	1992-07-08	Fletcher Robert P	A touch sensitive switching array
FR2699349B1 (fr) *	1992-12-14	1995-02-24	Jaeger Regulation	Clavier pour environnement sévère et appareil de cuisson comportant un tel clavier.
DE69419735T2 (de) *	1994-06-09	2000-03-16	Whirlpool Europe B.V.	Radiofrequente Fingertasten Steuervorrichtung für Öfen, Kochmulden, Kocher, Waschmaschinen, Geschirrspüler, od.dgl.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3112476A (en) *	1960-01-07	1963-11-26	Sylvania Electric Prod	Electronic switches
US3177481A (en) *	1961-08-10	1965-04-06	More	Electronic alertness control
US3492440A (en) *	1967-05-25	1970-01-27	Bell Telephone Labor Inc	Direct station selection telephone set employing proximity type selector switches
US3530312A (en) *	1969-02-14	1970-09-22	Hall Barkan Instr Inc	Touch responsive momentary switch circuit
JPS492779B1 (it) *	1969-05-02	1974-01-22
US3549909A (en) *	1969-08-25	1970-12-22	Hall Barkan Instr Inc	Touch activated ac,full wave,two-wire swtiches
US3760121A (en) *	1970-12-28	1973-09-18	Electronic Arrays	Telephone dialer with arithmetic calculation capability and visual display of digits
US3766404A (en) *	1971-11-16	1973-10-16	Magic Dot Inc	Composite d.c. amplifier for use with a touch sensitive electronic switch

1973
- 1973-03-09 US US339524A patent/US3877029A/en not_active Expired - Lifetime
1974
- 1974-02-05 GB GB528974A patent/GB1457572A/en not_active Expired
- 1974-02-06 ZA ZA740784A patent/ZA74784B/xx unknown
- 1974-02-12 IL IL44192A patent/IL44192A/en unknown
- 1974-02-21 CH CH247074A patent/CH591115A5/xx not_active IP Right Cessation
- 1974-02-28 DE DE2409615A patent/DE2409615A1/de not_active Withdrawn
- 1974-03-06 FR FR7407686A patent/FR2220832B1/fr not_active Expired
- 1974-03-07 JP JP49026722A patent/JPS49127527A/ja active Pending
- 1974-03-08 IT IT67661/74A patent/IT1009249B/it active
- 1974-03-08 CA CA194,414A patent/CA1001955A/en not_active Expired

Also Published As

Publication number	Publication date
AU6609974A (en)	1975-08-28
IL44192A0 (en)	1974-05-16
GB1457572A (en)	1976-12-08
FR2220832A1 (it)	1974-10-04
CH591115A5 (it)	1977-09-15
CA1001955A (en)	1976-12-21
IL44192A (en)	1977-03-31
JPS49127527A (it)	1974-12-06
IT1009249B (it)	1976-12-10
US3877029A (en)	1975-04-08
DE2409615A1 (de)	1974-09-12
FR2220832B1 (it)	1979-03-16

Publication	Publication Date	Title
IL43524A0 (en)	1974-01-14	An electronic calculator
HK43578A (en)	1978-08-11	Keyboard assemblies
HK62676A (en)	1976-10-15	Electronic watch
JPS56124256A (en)	1981-09-29	Integrated circuit
AU6613374A (en)	1975-08-28	Integrated circuit structure
GB1424306A (en)	1976-02-11	English keyboard scheme
CA1018664A (en)	1977-10-04	Keyboard electronic computer
HK68878A (en)	1978-12-01	Calculator
GB1488914A (en)	1977-10-19	Electronic timepiece
AU7060874A (en)	1976-01-08	Keyboard switch
BR7308267D0 (pt)	1974-08-29	Teclado de selecao eletronica
ZA74784B (en)	1974-12-24	Electronic keyboard
ZA74908B (en)	1974-12-24	Circuit arrangements including static converters
HK30282A (en)	1982-07-09	Electronic timepiece
AU6383473A (en)	1975-06-26	Electronic musical effects
GB1438263A (en)	1976-06-03	Linematching circuit
AU6352673A (en)	1975-06-12	Electronic calculator
AU7590674A (en)	1976-06-03	Electronic controls
AU6541374A (en)	1975-08-14	Electronic music
AU6117473A (en)	1975-04-10	Circuit arrangements
AU6939574A (en)	1975-11-27	Electronic organ
MY7800420A (en)	1978-12-31	Electronic wristwatch
MY7800414A (en)	1978-12-31	Electronic timepiece
MY7800426A (en)	1978-12-31	Electronic timepiece
AU6982574A (en)	1975-12-11	Circuit