ES398773A1 - Touch-sensitive switch employing electret foil - Google Patents
Touch-sensitive switch employing electret foilInfo
- Publication number
- ES398773A1 ES398773A1 ES398773A ES398773A ES398773A1 ES 398773 A1 ES398773 A1 ES 398773A1 ES 398773 A ES398773 A ES 398773A ES 398773 A ES398773 A ES 398773A ES 398773 A1 ES398773 A1 ES 398773A1
- Authority
- ES
- Spain
- Prior art keywords
- cover
- touch
- foil
- sensitive switch
- holes
- 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
Links
- 239000011888 foil Substances 0.000 title abstract 4
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
- H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
- H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
- H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
-
- 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
- H03K17/965—Switches controlled by moving an element forming part of the switch
- H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
- H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Signal Processing (AREA)
- Push-Button Switches (AREA)
- Electronic Switches (AREA)
Abstract
A keyboard switching arrangement that is mechanically simple, reliable, and which can be fabricated with an overall thickness of less than 1/4 inch, includes a plurality of independent conductive elements aligned with holes in a protective front cover. A single sheet of a metallized foil electret is interposed between the cover and the conductive members. The metal layer of the foil forms a capacitive transducer with each backplate section. Each switch is operated by touching the foil electret through one of the cover holes. The resulting displacement generates an electric output signal which is utilized for actuating an associated switching element or the like.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10153670A | 1970-12-28 | 1970-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES398773A1 true ES398773A1 (en) | 1974-08-16 |
Family
ID=22285159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES398773A Expired ES398773A1 (en) | 1970-12-28 | 1971-12-24 | Touch-sensitive switch employing electret foil |
Country Status (11)
Country | Link |
---|---|
US (1) | US3668417A (en) |
JP (1) | JPS5436311B1 (en) |
BE (1) | BE777202A (en) |
CA (1) | CA1009764A (en) |
DE (1) | DE2164202C3 (en) |
ES (1) | ES398773A1 (en) |
FR (1) | FR2120902A5 (en) |
GB (1) | GB1380709A (en) |
IT (1) | IT943354B (en) |
NL (1) | NL159837B (en) |
SE (1) | SE377974B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3751612A (en) * | 1971-08-30 | 1973-08-07 | Colorado Instr Inc | Snap action capacitive type switch |
US3786495A (en) * | 1972-05-17 | 1974-01-15 | Ncr | Stored charge transducer |
US4336529A (en) * | 1980-02-19 | 1982-06-22 | Pitney Bowes Inc. | Postage meter having shielded keyboard to protect against electromagnetic radiation |
US4561002A (en) * | 1982-08-30 | 1985-12-24 | General Electric Company | Capacitive touch switch arrangement |
US4593191A (en) * | 1982-12-29 | 1986-06-03 | At&T Bell Laboratories | Pressure and optical sensitive device with deformable protrusions |
US4456800A (en) * | 1983-05-25 | 1984-06-26 | Allen-Bradley Company | Planar contact array switch having improved ground path for dissipating electrostatic discharges |
DE8900946U1 (en) * | 1988-09-30 | 1990-02-08 | Siemens AG, 1000 Berlin und 8000 München | Capacitive circuit card |
US5835027A (en) * | 1996-11-07 | 1998-11-10 | Tyburski; Robert M. | Residual charge effect traffic sensor |
EP1444861B1 (en) * | 2001-10-09 | 2020-03-18 | Frank Joseph Pompei | Ultrasonic transducer for parametric array |
DE102004005954A1 (en) * | 2004-02-02 | 2005-08-18 | E.G.O. Elektro-Gerätebau GmbH | Operating device for an electrical appliance with a control panel and a sensor element underneath and method for operating the operating device |
FI117455B (en) * | 2004-07-07 | 2006-10-13 | Emfit Oy | Electrical connection of electromechanical control unit |
GB201312879D0 (en) * | 2013-07-18 | 2013-09-04 | Nokia Corp | Apparatuses, methods and computer programs for expanding the use of touch-sensitive input apparatus |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA822821A (en) * | 1969-09-09 | W. Reedyk Cornelis | Directional electret transducer | |
US2610245A (en) * | 1946-02-18 | 1952-09-09 | Robert H Rines | Electret array sensitive to radio waves |
US3118022A (en) * | 1961-08-07 | 1964-01-14 | Bell Telephone Labor Inc | Electroacoustic transducer |
US3290439A (en) * | 1963-04-29 | 1966-12-06 | Willcox | Data encoding keyboard |
US3308253A (en) * | 1965-03-25 | 1967-03-07 | Ibm | Diaphragm switch having a diaphragm supported on an incompressible layer and an elastomer overlaying the diaphragm |
US3503031A (en) * | 1969-02-11 | 1970-03-24 | Control Data Corp | Printed circuit keyboard |
-
1970
- 1970-12-28 US US101536A patent/US3668417A/en not_active Expired - Lifetime
-
1971
- 1971-08-31 CA CA121,796A patent/CA1009764A/en not_active Expired
- 1971-12-17 SE SE7116230A patent/SE377974B/xx unknown
- 1971-12-23 IT IT71218/71A patent/IT943354B/en active
- 1971-12-23 BE BE777202A patent/BE777202A/en not_active IP Right Cessation
- 1971-12-23 GB GB5990471A patent/GB1380709A/en not_active Expired
- 1971-12-23 DE DE2164202A patent/DE2164202C3/en not_active Expired
- 1971-12-24 ES ES398773A patent/ES398773A1/en not_active Expired
- 1971-12-27 FR FR7146746A patent/FR2120902A5/fr not_active Expired
- 1971-12-27 NL NL7117891.A patent/NL159837B/en not_active IP Right Cessation
- 1971-12-28 JP JP365272A patent/JPS5436311B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2164202C3 (en) | 1974-05-09 |
DE2164202A1 (en) | 1972-07-13 |
CA1009764A (en) | 1977-05-03 |
JPS4713585A (en) | 1972-07-13 |
NL7117891A (en) | 1972-06-30 |
SE377974B (en) | 1975-08-04 |
BE777202A (en) | 1972-04-17 |
GB1380709A (en) | 1975-01-15 |
FR2120902A5 (en) | 1972-08-18 |
DE2164202B2 (en) | 1973-10-18 |
JPS5436311B1 (en) | 1979-11-08 |
US3668417A (en) | 1972-06-06 |
NL159837B (en) | 1979-03-15 |
IT943354B (en) | 1973-04-02 |
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