GB1321863A - Touch-operated switching devices - Google Patents
Touch-operated switching devicesInfo
- Publication number
- GB1321863A GB1321863A GB1321863DA GB1321863A GB 1321863 A GB1321863 A GB 1321863A GB 1321863D A GB1321863D A GB 1321863DA GB 1321863 A GB1321863 A GB 1321863A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- contact
- contacts
- pair
- touch
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9645—Resistive touch switches
Landscapes
- Electronic Switches (AREA)
- Amplifiers (AREA)
Abstract
1321863 Non-contact-making switches INTERNATIONAL COMPUTERS Ltd 26 May 1971 [27 Feb 1970] 9627/70 Heading H3B A transistor 14, Fig. 2, is switched to its conductive state by bridging a pair of contacts 1, 1<SP>1</SP> with a human finger, the transistor base current being limited by a series resistor 13 while pick-up hum is removed by a shunt capacitor 11. The change of state of transistor 14 is amplified through inverting transistors 16, 18 and is applied as a D.C. output at terminal 20. In a modification, Fig. 3 (not shown), the transistor 14 is replaced by a Darlington pair. A plurality of contact pairs each controlling a different transistor may be mounted on a common panel, Fig. 1 (not shown), and a contact pair may be shaped to form an appropriate label, Fig. 4. A modified contact arrangement uses three contacts 31a, 31b, 32, Fig. 6, of which the outer contacts are commoned.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB962770 | 1970-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1321863A true GB1321863A (en) | 1973-07-04 |
Family
ID=9875641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1321863D Expired GB1321863A (en) | 1970-02-27 | 1970-02-27 | Touch-operated switching devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1321863A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190254A (en) * | 1986-05-07 | 1987-11-11 | Duracell Int | Condition responsive switching circuit |
| WO1991015257A1 (en) * | 1990-03-30 | 1991-10-17 | Alza Corporation | Iontophoretic delivery device |
| WO1998014235A1 (en) | 1996-10-01 | 1998-04-09 | Becton Dickinson And Company | Awakenable iontophoretic delivery device for reducing electrical sensation upon application thereof |
| CN109167334A (en) * | 2018-09-21 | 2019-01-08 | 王汉禄 | Multi-purpose intelligent breaker |
-
1970
- 1970-02-27 GB GB1321863D patent/GB1321863A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190254A (en) * | 1986-05-07 | 1987-11-11 | Duracell Int | Condition responsive switching circuit |
| WO1991015257A1 (en) * | 1990-03-30 | 1991-10-17 | Alza Corporation | Iontophoretic delivery device |
| US5314502A (en) * | 1990-03-30 | 1994-05-24 | Alza Corporation | Iontophoretic delivery device |
| WO1998014235A1 (en) | 1996-10-01 | 1998-04-09 | Becton Dickinson And Company | Awakenable iontophoretic delivery device for reducing electrical sensation upon application thereof |
| CN109167334A (en) * | 2018-09-21 | 2019-01-08 | 王汉禄 | Multi-purpose intelligent breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |