IT1024439B - IMPROVEMENT IN KEYBOARDS WITH ELECTRIC CONTACTS IN PARTICULAR FOR CALCULATORS AND SIMILAR - Google Patents

IMPROVEMENT IN KEYBOARDS WITH ELECTRIC CONTACTS IN PARTICULAR FOR CALCULATORS AND SIMILAR

Info

Publication number
IT1024439B
IT1024439B IT54523/74A IT5452374A IT1024439B IT 1024439 B IT1024439 B IT 1024439B IT 54523/74 A IT54523/74 A IT 54523/74A IT 5452374 A IT5452374 A IT 5452374A IT 1024439 B IT1024439 B IT 1024439B
Authority
IT
Italy
Prior art keywords
calculators
keyboards
improvement
similar
electric contacts
Prior art date
Application number
IT54523/74A
Other languages
Italian (it)
Inventor
H J Boulanger
R G Henley
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Application granted granted Critical
Publication of IT1024439B publication Critical patent/IT1024439B/en

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
    • H01H13/7006—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 comprising a separate movable contact element for each switch site, all other elements being integrated in layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/008—Actuators other then push button
    • H01H2221/016—Lever; Rocker
IT54523/74A 1973-12-17 1974-12-12 IMPROVEMENT IN KEYBOARDS WITH ELECTRIC CONTACTS IN PARTICULAR FOR CALCULATORS AND SIMILAR IT1024439B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42541873A 1973-12-17 1973-12-17

Publications (1)

Publication Number Publication Date
IT1024439B true IT1024439B (en) 1978-06-20

Family

ID=23686486

Family Applications (1)

Application Number Title Priority Date Filing Date
IT54523/74A IT1024439B (en) 1973-12-17 1974-12-12 IMPROVEMENT IN KEYBOARDS WITH ELECTRIC CONTACTS IN PARTICULAR FOR CALCULATORS AND SIMILAR

Country Status (12)

Country Link
JP (1) JPS5093339A (en)
AR (1) AR204336A1 (en)
BR (1) BR7410490D0 (en)
DE (1) DE2459464B2 (en)
DK (1) DK647774A (en)
ES (1) ES432571A1 (en)
FR (1) FR2254821B1 (en)
GB (1) GB1493809A (en)
IT (1) IT1024439B (en)
NL (1) NL7415461A (en)
SE (1) SE7415784L (en)
YU (1) YU322574A (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055734A (en) * 1973-12-26 1977-10-25 Thomas John Hayden Keyboard switch assembly with hinged pushbuttons and cantilevered terminal members
US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4070555A (en) * 1975-11-28 1978-01-24 The Alliance Manufacturing Company Switching mechanism
US4066850A (en) * 1976-06-04 1978-01-03 Ncr Corporation Keyboard switch assembly having interchangeable cover plate, indicating layer and actuator switch assembly in any operative combination
US4190748A (en) * 1977-01-31 1980-02-26 Rogers Corporation Keyboard switch assembly
US4128744A (en) * 1977-02-22 1978-12-05 Chomerics, Inc. Keyboard with concave and convex domes
US4136270A (en) * 1977-03-24 1979-01-23 Gte Automatic Electric Laboratories Incorporated Actuator for pushbutton switch
DE2909882A1 (en) * 1977-08-31 1980-09-25 Braun Ag Casing for electric razor,camera etc. - has electrical components on plate attached to another plate whose posts project through perforated outer wall
JPS5843147Y2 (en) * 1978-12-28 1983-09-29 シャープ株式会社 key input device
CA1100165A (en) * 1979-02-02 1981-04-28 Roger Perks Pushbutton switch assembly for telecommunications and other input apparatus
JPS5924109Y2 (en) * 1979-06-22 1984-07-17 シチズン時計株式会社 Push button structure for small portable devices
FR2460444A1 (en) * 1979-07-04 1981-01-23 Jaeger LIGHTING DEVICE FOR KEYBOARDS
DE2953881C1 (en) * 1979-08-16 1982-07-22 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Keypad
DE2933150C2 (en) * 1979-08-16 1982-03-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Keypad
JPS57152725U (en) * 1981-03-20 1982-09-25
SE433675B (en) * 1981-04-09 1984-06-04 Ericsson Telefon Ab L M PROCEDURE FOR MANUFACTURING A PRESSURE BUTTON
DE3208559C2 (en) * 1982-03-10 1985-12-05 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt keyboard
CA1188389A (en) * 1982-06-28 1985-06-04 Northern Telecom Limited Pushbutton switch assembly
DE3305556C1 (en) * 1983-02-18 1984-09-13 Philips Patentverwaltung Gmbh, 2000 Hamburg Keyboard switch panel for an electrical apparatus
KR900002951B1 (en) * 1985-01-25 1990-05-03 마쯔시다덴기산교 가부시기가이샤 Push-button device
US4831719A (en) * 1987-10-28 1989-05-23 Tsai Huo L Manufacturing method of a keyboard
US5006680A (en) * 1989-05-05 1991-04-09 Augat, Inc. Snap action switch
DE10142503A1 (en) * 2001-08-30 2003-03-20 Bsh Bosch Siemens Hausgeraete Electric kitchen appliance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS412186Y1 (en) * 1965-05-14 1966-02-15
US3725907A (en) * 1971-06-01 1973-04-03 Texas Instruments Inc Pushbutton keyboard system

Also Published As

Publication number Publication date
BR7410490D0 (en) 1975-09-16
YU322574A (en) 1982-05-31
AR204336A1 (en) 1975-12-22
DK647774A (en) 1975-08-18
JPS5093339A (en) 1975-07-25
FR2254821B1 (en) 1976-12-31
FR2254821A1 (en) 1975-07-11
GB1493809A (en) 1977-11-30
SE7415784L (en) 1975-06-18
ES432571A1 (en) 1976-11-01
NL7415461A (en) 1975-06-19
DE2459464B2 (en) 1977-09-08
DE2459464A1 (en) 1975-06-26

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