US3647962A - Keyboard encoding - Google Patents

Keyboard encoding Download PDF

Info

Publication number
US3647962A
US3647962A US59449A US3647962DA US3647962A US 3647962 A US3647962 A US 3647962A US 59449 A US59449 A US 59449A US 3647962D A US3647962D A US 3647962DA US 3647962 A US3647962 A US 3647962A
Authority
US
United States
Prior art keywords
key
shock wave
responsive
spark
keys
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 - Lifetime
Application number
US59449A
Other languages
English (en)
Inventor
Albert L Whetstone
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 Accessories Corp
Original Assignee
Science Accessories 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 Accessories Corp filed Critical Science Accessories Corp
Application granted granted Critical
Publication of US3647962A publication Critical patent/US3647962A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • Prior art keyboard encoding devices employ complex matrix networks and the like for providing unique identifiable digital locations for the respective keys.
  • the difficulties with such arrangements lies in their expense, complexity, and the need for a large amount ofwiring.
  • the microphone units may be any form of acoustic transducer constructed so as to produce a substantially uniform magnitude output pulse in response to the incidence at any point along the microphone length of a sound shock wave front.
  • a preferred form of microphone structure is indicated at FIG. 3A, showing a cross-sectional view of a microphone used in FIG. 1 and as shown therein is constructed of a bar length of any type of metallic base structure 123 such as aluminum.
  • a layer of insulating polyester film 127 such as mylar is mounted to the surface 125.
  • a metal layer 129 such as copper is mounted to the insulating film 127.
  • each of the thyristors are nonconducting and each capacitor is charged up to v.
  • the appearance of a pulse from the source 164 will, through transformer action, switch the thyristor 198 by applying a positive potential to the gate electrode, thereby rendering the thyristor conductive.
  • the flow through thyristor 198 clamps the lower plate of capacitor 192 at +V, thereby driving the upper plate to V+V or 2V.
  • the thyristor 200 also rendered conductive, clamps the lower plate of capacitor 194 at +2V, thereby driving the upper plate 2V+V or 3V.
  • An encoder comprising a plurality of individually actuatable keys, first means coupled to each of said keys and responsive to the actuation of any said key for providing a shock wave at a location with respect to a fixed point, said location uniquely identifiable with respect to the key actuated, second means responsive to production of said acoustic shock wave to begin accumulation of a digital quantity, and third means positioned at said fixed point and responsive to said shock wave for terminating the operation of said second means, said second means thereby providing a digital representation of said actuated key.

Landscapes

  • Electrophonic Musical Instruments (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US59449A 1970-07-30 1970-07-30 Keyboard encoding Expired - Lifetime US3647962A (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
US3647962A true US3647962A (en) 1972-03-07

Family

ID=22023018

Family Applications (1)

Application Number Title Priority Date Filing Date
US59449A Expired - Lifetime US3647962A (en) 1970-07-30 1970-07-30 Keyboard encoding

Country Status (4)

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

Cited By (9)

* 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
US4384795A (en) * 1981-08-20 1983-05-24 Lutes Bill N Standardized interface for acoustic bar typewriters
DE3543605A1 (de) * 1984-12-11 1986-06-19 Alps Electric Co., Ltd., Tokio/Tokyo Tastaturvorrichtung
US4599607A (en) * 1983-10-31 1986-07-08 General Instrument Corporation Acoustic keyboard
US5009277A (en) * 1990-03-19 1991-04-23 Science Accessories Corp. Method and apparatus for position determination
US5054005A (en) * 1990-03-16 1991-10-01 Science Accessories Corp. Apparatus and method for determining travel time of acoustic energy
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
US20150063074A1 (en) * 2013-09-02 2015-03-05 Hyundai Motor Company Apparatus and method for providing a customized input-service

Families Citing this family (3)

* 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
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same
US4912462A (en) * 1982-07-29 1990-03-27 Sharp Kabushiki Kaisha Letter input device for electronic word retrieval device

Citations (3)

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

Patent Citations (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 (10)

* 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
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
DE3543605A1 (de) * 1984-12-11 1986-06-19 Alps Electric Co., Ltd., Tokio/Tokyo Tastaturvorrichtung
US4677600A (en) * 1984-12-11 1987-06-30 Alps Electric Co., Ltd. Keyboard apparatus
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
US20150063074A1 (en) * 2013-09-02 2015-03-05 Hyundai Motor Company Apparatus and method for providing a customized input-service

Also Published As

Publication number Publication date
GB1348007A (en) 1974-03-13
JPS5032613B1 (enExample) 1975-10-22
FR2099394A5 (enExample) 1972-03-10

Similar Documents

Publication Publication Date Title
US3838212A (en) Graphical data device
US3821469A (en) Graphical data device
US3647962A (en) Keyboard encoding
US3573755A (en) Electrical tablet for graphic input system
US3653038A (en) Capacitive electric signal device and keyboard using said device
US2837666A (en) Radioactive voltage source employing a gaseous dielectric medium
US3692936A (en) Acoustic coordinate data determination system
US4125783A (en) Touch switches
GB978330A (en) Improvements relating to the conversion of graphical data to digital form
US2524213A (en) Gaseous discharge tube system
US3648277A (en) Magnetic graphical data device
US3226568A (en) Gating means for passing a predetermined number of pulses
US3208076A (en) Electrostatic printer
US3111591A (en) Transistor step counter
US4156182A (en) Lightning strike detector
GB985223A (en) Apparatus for producing a signal representative of a light pattern
GB1164422A (en) Circuit Arrangements for Imitating the Touch of Percussive Musical Instruments
US2878382A (en) Precision time-delay circuit
US3740745A (en) Ring core keyboard entry device
US3657555A (en) Variable passive voltage transient generator
US2999172A (en) Transistor trigger circuit
US2864948A (en) Data transfer control circuit
US2788940A (en) Electric pulse responsive counter
US3305737A (en) Pressure transducing key
US3013164A (en) Linear saw-tooth generator