GB1348007A - Keyboard encoding apparatus - Google Patents

Keyboard encoding apparatus

Info

Publication number
GB1348007A
GB1348007A GB3512071A GB3512071A GB1348007A GB 1348007 A GB1348007 A GB 1348007A GB 3512071 A GB3512071 A GB 3512071A GB 3512071 A GB3512071 A GB 3512071A GB 1348007 A GB1348007 A GB 1348007A
Authority
GB
United Kingdom
Prior art keywords
voltage
source
thyristors
july
conduct
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3512071A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCIENCE ACESSORIES CORP
Original Assignee
SCIENCE ACESSORIES CORP
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.)
Filing date
Publication date
Application filed by SCIENCE ACESSORIES CORP filed Critical SCIENCE ACESSORIES CORP
Publication of GB1348007A publication Critical patent/GB1348007A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/907—Coordinate determination

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electrophonic Musical Instruments (AREA)
GB3512071A 1970-07-30 1971-07-27 Keyboard encoding apparatus Expired GB1348007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5944970A 1970-07-30 1970-07-30

Publications (1)

Publication Number Publication Date
GB1348007A true GB1348007A (en) 1974-03-13

Family

ID=22023018

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3512071A Expired GB1348007A (en) 1970-07-30 1971-07-27 Keyboard encoding apparatus

Country Status (4)

Country Link
US (1) US3647962A (enExample)
JP (1) JPS5032613B1 (enExample)
FR (1) FR2099394A5 (enExample)
GB (1) GB1348007A (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258356A (en) 1978-04-03 1981-03-24 Scm Corporation Multi bar encoding apparatus utilizing acoustic energy
US4378552A (en) * 1977-11-21 1983-03-29 Scm Corporation Acoustic encoding apparatus
GB2125199A (en) * 1982-07-29 1984-02-29 Sharp Kk Input device
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384795A (en) * 1981-08-20 1983-05-24 Lutes Bill N Standardized interface for acoustic bar typewriters
US4599607A (en) * 1983-10-31 1986-07-08 General Instrument Corporation Acoustic keyboard
JPS61138420A (ja) * 1984-12-11 1986-06-25 アルプス電気株式会社 キ−ボ−ド装置
US5054005A (en) * 1990-03-16 1991-10-01 Science Accessories Corp. Apparatus and method for determining travel time of acoustic energy
US5009277A (en) * 1990-03-19 1991-04-23 Science Accessories Corp. Method and apparatus for position determination
EP0933909A1 (fr) * 1998-01-30 1999-08-04 Koninklijke Philips Electronics N.V. Equipement téléphonique comportant un clavier à touches générateur de sons
US6690618B2 (en) * 2001-04-03 2004-02-10 Canesta, Inc. Method and apparatus for approximating a source position of a sound-causing event for determining an input used in operating an electronic device
KR101526681B1 (ko) * 2013-09-02 2015-06-05 현대자동차주식회사 사용자 맞춤형 입력서비스를 제공하는 장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176263A (en) * 1960-08-19 1965-03-30 Ellwood S Donglas Measuring and recording method and apparatus
US3134099A (en) * 1962-12-21 1964-05-19 Ibm Ultrasonic data converter
US3568183A (en) * 1968-07-09 1971-03-02 Gen Electric Keyboard synchronized toned generator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4378552A (en) * 1977-11-21 1983-03-29 Scm Corporation Acoustic encoding apparatus
US4258356A (en) 1978-04-03 1981-03-24 Scm Corporation Multi bar encoding apparatus utilizing acoustic energy
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same
GB2125199A (en) * 1982-07-29 1984-02-29 Sharp Kk Input device

Also Published As

Publication number Publication date
FR2099394A5 (enExample) 1972-03-10
JPS5032613B1 (enExample) 1975-10-22
US3647962A (en) 1972-03-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee