SE8000792L - telephone apparatus - Google Patents

telephone apparatus

Info

Publication number
SE8000792L
SE8000792L SE8000792A SE8000792A SE8000792L SE 8000792 L SE8000792 L SE 8000792L SE 8000792 A SE8000792 A SE 8000792A SE 8000792 A SE8000792 A SE 8000792A SE 8000792 L SE8000792 L SE 8000792L
Authority
SE
Sweden
Prior art keywords
steel plate
pcb
circuit
telephone apparatus
pushbutton
Prior art date
Application number
SE8000792A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE440567B (en
Inventor
G V Lenaerts
R Perks
P J Dudley
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of SE8000792L publication Critical patent/SE8000792L/en
Publication of SE440567B publication Critical patent/SE440567B/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/144—Stacked arrangements of planar printed circuit boards
    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
    • H05K1/053—Insulated conductive substrates, e.g. insulated metal substrate the metal substrate being covered by an inorganic insulating layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Push-Button Switches (AREA)
  • Telephone Set Structure (AREA)
  • Telephonic Communication Services (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

A pushbutton switch assembly has at least one of the conventional PCB's replaced by a porcelain coated steel plate 30. The contact circuit 31 for the pushbutton switches 13, 19 is formed on the top surface of the steel plate 30. It is also possible to replace both PCB's of a conventional switch by forming a second circuit on the under surface of the steel plate, with the electrical devices mounted thereon. Use of the steel plate enables the normal metal mounting plate to be omitted. <IMAGE>
SE8000792A 1979-02-02 1980-01-31 Pushbutton stellare SE440567B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA320,732A CA1100165A (en) 1979-02-02 1979-02-02 Pushbutton switch assembly for telecommunications and other input apparatus

Publications (2)

Publication Number Publication Date
SE8000792L true SE8000792L (en) 1980-08-03
SE440567B SE440567B (en) 1985-08-05

Family

ID=4113441

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8000792A SE440567B (en) 1979-02-02 1980-01-31 Pushbutton stellare

Country Status (9)

Country Link
JP (1) JPS55124914A (en)
BE (1) BE881507A (en)
CA (1) CA1100165A (en)
DE (1) DE3003715A1 (en)
FR (1) FR2448218A1 (en)
GB (1) GB2043352B (en)
IT (1) IT1193911B (en)
NO (1) NO153197C (en)
SE (1) SE440567B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130159A1 (en) * 1981-07-30 1983-02-17 Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. Gmbh & Co, 8740 Bad Neustadt "METHOD FOR PRODUCING BOARD"
JPH049706Y2 (en) * 1984-09-13 1992-03-11
GB2250380B (en) * 1990-11-27 1995-01-04 Ist Lab Ltd Switch apparatus
GB2308499B (en) * 1995-12-22 2000-03-15 Nokia Mobile Phones Ltd A contact membrane for a keypad assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB990023A (en) * 1961-03-13 1965-04-22 Ass Elect Ind Improvements relating to printed electrical circults
US3843851A (en) * 1971-09-17 1974-10-22 Canon Kk A rigid compact electronic computer
FR2196515B1 (en) * 1972-08-18 1977-09-16 Matsushita Electric Ind Co Ltd
AR204336A1 (en) * 1973-12-17 1975-12-22 Texas Instruments Inc KEYBOARD PIECE
CA1034175A (en) * 1975-04-16 1978-07-04 Pak-Jong Chu Multi-contact push-button switch
CA1019374A (en) * 1975-04-16 1977-10-18 Cornelis W. Reedyk Multi-contact push-button switch
US3969600A (en) * 1975-06-11 1976-07-13 Burroughs Corporation Tactile feedback keyboard switch assembly and actuator

Also Published As

Publication number Publication date
IT1193911B (en) 1988-08-31
BE881507A (en) 1980-08-01
FR2448218A1 (en) 1980-08-29
DE3003715A1 (en) 1980-08-14
NO153197C (en) 1986-01-29
IT8019650A0 (en) 1980-02-01
NO800228L (en) 1980-08-04
NO153197B (en) 1985-10-21
SE440567B (en) 1985-08-05
GB2043352A (en) 1980-10-01
CA1100165A (en) 1981-04-28
JPS55124914A (en) 1980-09-26
FR2448218B1 (en) 1984-02-24
GB2043352B (en) 1983-04-13

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