CA1104235A - Switch mechanism for a calculator type keyboard - Google Patents

Switch mechanism for a calculator type keyboard

Info

Publication number
CA1104235A
CA1104235A CA292,124A CA292124A CA1104235A CA 1104235 A CA1104235 A CA 1104235A CA 292124 A CA292124 A CA 292124A CA 1104235 A CA1104235 A CA 1104235A
Authority
CA
Canada
Prior art keywords
contact
web
apparatus recited
conductor
dome
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
CA292,124A
Other languages
English (en)
French (fr)
Inventor
Theodore D. Smith
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.)
RCA Corp
Original Assignee
RCA 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
Priority claimed from US05/748,025 external-priority patent/US4084071A/en
Application filed by RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA1104235A publication Critical patent/CA1104235A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H13/7013—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 in which the movable contacts of each switch site or of a row of switch sites are formed in a single plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/036—Form of contacts to solve particular problems
    • H01H2203/038—Form of contacts to solve particular problems to be bridged by a dome shaped contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/036—Form of contacts to solve particular problems
    • H01H2203/054—Form of contacts to solve particular problems for redundancy, e.g. several contact pairs in parallel

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
CA292,124A 1976-12-06 1977-12-01 Switch mechanism for a calculator type keyboard Expired CA1104235A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US74802676A 1976-12-06 1976-12-06
US748,026 1976-12-06
US05/748,025 US4084071A (en) 1976-12-06 1976-12-06 Switch mechanism for a calculator type keyboard
US748,025 1976-12-06

Publications (1)

Publication Number Publication Date
CA1104235A true CA1104235A (en) 1981-06-30

Family

ID=27114860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA292,124A Expired CA1104235A (en) 1976-12-06 1977-12-01 Switch mechanism for a calculator type keyboard

Country Status (8)

Country Link
JP (1) JPS6051216B2 (it)
CA (1) CA1104235A (it)
DE (1) DE2754296C3 (it)
FI (1) FI64477C (it)
FR (1) FR2373136A1 (it)
GB (1) GB1592283A (it)
IT (1) IT1088702B (it)
MX (1) MX3894E (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436970A (en) * 1982-06-07 1984-03-13 Methode Electronics, Inc. Switch assemblies
JPH044338Y2 (it) * 1985-05-31 1992-02-07
JPH0437138Y2 (it) * 1986-10-24 1992-09-01
GB2308499B (en) * 1995-12-22 2000-03-15 Nokia Mobile Phones Ltd A contact membrane for a keypad assembly

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3600528A (en) * 1969-09-25 1971-08-17 Lematex Corp Multiple switch construction
DE7437240U (de) * 1974-11-08 1975-08-07 Blaupunkt Werke Gmbh Tastenschaltersystem

Also Published As

Publication number Publication date
IT1088702B (it) 1985-06-10
FR2373136A1 (fr) 1978-06-30
FI64477B (fi) 1983-07-29
FI773604A (fi) 1978-06-07
FR2373136B1 (it) 1981-01-16
FI64477C (fi) 1983-11-10
JPS5386477A (en) 1978-07-29
DE2754296A1 (de) 1978-06-08
JPS6051216B2 (ja) 1985-11-13
MX3894E (es) 1981-09-08
DE2754296C3 (de) 1981-05-21
GB1592283A (en) 1981-07-01
DE2754296B2 (de) 1980-08-21

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Legal Events

Date Code Title Description
MKEX Expiry