SE8000792L - telephone apparatus - Google Patents
telephone apparatusInfo
- 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
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)
- Input From Keyboards Or The Like (AREA)
- Telephonic Communication Services (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>
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3130159C2 (en) * | 1981-07-30 | 1987-02-05 | Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt | Process for manufacturing printed circuit boards |
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)
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 |
US3898421A (en) * | 1972-08-18 | 1975-08-05 | Matsushita Electric Ind Co Ltd | Push button switch with elastic conductive sheet |
AR204336A1 (en) * | 1973-12-17 | 1975-12-22 | Texas Instruments Inc | KEYBOARD PIECE |
CA1019374A (en) * | 1975-04-16 | 1977-10-18 | Cornelis W. Reedyk | Multi-contact push-button switch |
CA1034175A (en) * | 1975-04-16 | 1978-07-04 | Pak-Jong Chu | Multi-contact push-button switch |
US3969600A (en) * | 1975-06-11 | 1976-07-13 | Burroughs Corporation | Tactile feedback keyboard switch assembly and actuator |
-
1979
- 1979-02-02 CA CA320,732A patent/CA1100165A/en not_active Expired
-
1980
- 1980-01-30 NO NO80800228A patent/NO153197C/en unknown
- 1980-01-31 GB GB8003336A patent/GB2043352B/en not_active Expired
- 1980-01-31 FR FR8002091A patent/FR2448218A1/en active Granted
- 1980-01-31 SE SE8000792A patent/SE440567B/en not_active IP Right Cessation
- 1980-02-01 BE BE0/199230A patent/BE881507A/en not_active IP Right Cessation
- 1980-02-01 DE DE19803003715 patent/DE3003715A1/en not_active Withdrawn
- 1980-02-01 JP JP1013280A patent/JPS55124914A/en active Pending
- 1980-02-01 IT IT19650/80A patent/IT1193911B/en active
Also Published As
Publication number | Publication date |
---|---|
FR2448218B1 (en) | 1984-02-24 |
DE3003715A1 (en) | 1980-08-14 |
NO153197C (en) | 1986-01-29 |
NO800228L (en) | 1980-08-04 |
GB2043352B (en) | 1983-04-13 |
BE881507A (en) | 1980-08-01 |
CA1100165A (en) | 1981-04-28 |
FR2448218A1 (en) | 1980-08-29 |
SE440567B (en) | 1985-08-05 |
NO153197B (en) | 1985-10-21 |
IT8019650A0 (en) | 1980-02-01 |
IT1193911B (en) | 1988-08-31 |
GB2043352A (en) | 1980-10-01 |
JPS55124914A (en) | 1980-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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