JPS5248925A - Contact detection circuit - Google Patents

Contact detection circuit

Info

Publication number
JPS5248925A
JPS5248925A JP50125021A JP12502175A JPS5248925A JP S5248925 A JPS5248925 A JP S5248925A JP 50125021 A JP50125021 A JP 50125021A JP 12502175 A JP12502175 A JP 12502175A JP S5248925 A JPS5248925 A JP S5248925A
Authority
JP
Japan
Prior art keywords
detection circuit
contact detection
detection
difference
effectively prevented
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.)
Pending
Application number
JP50125021A
Other languages
Japanese (ja)
Inventor
Yuichiro Iwai
Yoshiichi Kawamura
Akio Shimoi
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP50125021A priority Critical patent/JPS5248925A/en
Priority to US05/730,763 priority patent/US4105902A/en
Priority to CH1276576A priority patent/CH616816B/en
Publication of JPS5248925A publication Critical patent/JPS5248925A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electric Clocks (AREA)
  • Calculators And Similar Devices (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: For the wristwatch containing keyboard, the skin resistance touch switch is used for detection of signal delay caused by the difference of touching area. Thus, malfunction due to multiple hitting keys can be effectively prevented.
COPYRIGHT: (C)1977,JPO&Japio
JP50125021A 1975-10-08 1975-10-17 Contact detection circuit Pending JPS5248925A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP50125021A JPS5248925A (en) 1975-10-17 1975-10-17 Contact detection circuit
US05/730,763 US4105902A (en) 1975-10-08 1976-10-08 Touch sensitive input for electronic wristwatch and/or electronic calculator
CH1276576A CH616816B (en) 1975-10-08 1976-10-08 ELECTRONIC WRISTWATCH.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50125021A JPS5248925A (en) 1975-10-17 1975-10-17 Contact detection circuit

Publications (1)

Publication Number Publication Date
JPS5248925A true JPS5248925A (en) 1977-04-19

Family

ID=14899885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50125021A Pending JPS5248925A (en) 1975-10-08 1975-10-17 Contact detection circuit

Country Status (1)

Country Link
JP (1) JPS5248925A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04147912A (en) * 1990-10-08 1992-05-21 Nippon Steel Corp Treatment of metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04147912A (en) * 1990-10-08 1992-05-21 Nippon Steel Corp Treatment of metal

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