ES361214A1 - Push Button Signalling - Google Patents
Push Button SignallingInfo
- Publication number
- ES361214A1 ES361214A1 ES361214A ES361214A ES361214A1 ES 361214 A1 ES361214 A1 ES 361214A1 ES 361214 A ES361214 A ES 361214A ES 361214 A ES361214 A ES 361214A ES 361214 A1 ES361214 A1 ES 361214A1
- Authority
- ES
- Spain
- Prior art keywords
- piezo
- push
- elements
- loaded
- buttons
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
In a subscriber's V.F. keysender, each key is associated with a pair of piezo-electric elements and each element is connected to one of five monostable multivibrators whereby whenever a key is actuated a unique 2-out-of-5 U.F. signal of fixed duration is produced by the two energized multivibrators. As shown, depression of a push-button 15 is initially resisted by flexible limbs 19, 20, these limbs opening when sufficient pressure is exerted so as to allow a portion 16 of the spring-loaded key stem to impinge on piezo crystals 10, 11 and thus cause the latter to emit control signals to a pair of monostable multivibrators (Fig. 3, not shown). In another embodiment (Figs. 7-9, not shown) the keys are supported in resilient mountings and act upon bowed-springs when depressed. The bowedsprings may be formed integrally in a single sheet of springy material. The piezo elements may comprise a grid array of piezo strips, with push-buttons located at the cross-points (Figs. 6a, 6b, not shown). Fig. 10 (not shown) depicts the use of spring-loaded intermediate members which are arranged to impinge sharply on the piezo elements when their associated spring- loaded push-buttons are operated. In a similar arrangement (Fig. 12, not shown) the intermediate-members are initially made to touch the elements gently and then to move away from them rapidly when the push-buttons are actuated. The use of strips of piezo material which are supported at one or both ends so as to be bent by actuation of a push-button is mentioned with respect to Figs. 13 and 14 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5574267A GB1198308A (en) | 1967-12-07 | 1967-12-07 | Push Button Signalling |
Publications (1)
Publication Number | Publication Date |
---|---|
ES361214A1 true ES361214A1 (en) | 1970-11-01 |
Family
ID=10474763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES361214A Expired ES361214A1 (en) | 1967-12-07 | 1968-12-07 | Push Button Signalling |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE725116A (en) |
CH (1) | CH492350A (en) |
DE (1) | DE1812021A1 (en) |
ES (1) | ES361214A1 (en) |
FR (1) | FR1599158A (en) |
GB (1) | GB1198308A (en) |
IE (1) | IE32241B1 (en) |
NL (1) | NL6817585A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1363215A (en) * | 1973-01-04 | 1974-08-14 | Mullard Ltd | Mechanical-electrical transducer |
JPS5410214B2 (en) * | 1973-10-15 | 1979-05-02 | ||
GB9000932D0 (en) * | 1990-01-16 | 1990-03-14 | Maygay Machines | Machine controls |
DE4231734A1 (en) * | 1991-09-26 | 1993-04-01 | Fuji Electric Co Ltd | PIEZOELECTRICAL DEVICE |
BE1014200A7 (en) * | 2001-05-29 | 2003-06-03 | Joye Jean | Phone disabled designed to allow the handling, use without sight and / or by persons with reduced manual dexterity. |
KR20050027654A (en) * | 2003-09-16 | 2005-03-21 | 에스케이텔레텍주식회사 | Mobile communication terminal of slide type |
-
1967
- 1967-12-07 GB GB5574267A patent/GB1198308A/en not_active Expired
-
1968
- 1968-08-06 IE IE95468A patent/IE32241B1/en unknown
- 1968-11-30 DE DE19681812021 patent/DE1812021A1/en active Pending
- 1968-12-04 CH CH1808968A patent/CH492350A/en not_active IP Right Cessation
- 1968-12-05 FR FR1599158D patent/FR1599158A/fr not_active Expired
- 1968-12-06 NL NL6817585A patent/NL6817585A/xx unknown
- 1968-12-07 ES ES361214A patent/ES361214A1/en not_active Expired
- 1968-12-09 BE BE725116D patent/BE725116A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
IE32241B1 (en) | 1973-05-30 |
BE725116A (en) | 1969-06-09 |
DE1812021A1 (en) | 1969-08-14 |
CH492350A (en) | 1970-06-15 |
GB1198308A (en) | 1970-07-08 |
NL6817585A (en) | 1969-06-10 |
FR1599158A (en) | 1970-07-15 |
IE32241L (en) | 1969-06-07 |
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