GB1101208A - Improvements in or relating to warning devices - Google Patents
Improvements in or relating to warning devicesInfo
- Publication number
- GB1101208A GB1101208A GB4979565A GB4979565A GB1101208A GB 1101208 A GB1101208 A GB 1101208A GB 4979565 A GB4979565 A GB 4979565A GB 4979565 A GB4979565 A GB 4979565A GB 1101208 A GB1101208 A GB 1101208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- probes
- warning
- amplifier
- alarm
- nov
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
1,101,208. Detecting voltage presence. C.W. WING & CO. Ltd. Nov. 22, 1966 [Nov. 23, 1965], No.49795/65. Heading G1N. In apparatus for giving warning of the close proximity of an overhead high voltage power supply line, an alarm sounds when the instantaneous potential difference between two probes exceeds a predetermined value. As shown, two probes 1 and 2 are connected through respective two stage transistor amplifiers 3, 4, having emitter follower outputs, and resistors 5, 6 to respective ends of a primary winding of a transformer 7, the secondary winding of which is connected through a two-stage transistor amplifier 8 with adjustable feedback 9 to a close tolerance relay 10 which in turn is connected to a heavy duty relay (not shown) to control an alarm bell 11. A test oscillator 12 can inject a test signal into amplifier 3. Warning of failure may be provided by relays (not shown) that operate if the mains current taken rises above or falls below a predetermined range of values. A small voltage proportional to the potential of each probe may be fed directly to amplifier 8 so that warning may be given even if the two probes are equidistant from the power line. The probes may be flat circular plates, cylinders or spheres. A loudspeaker alarm may replace the bell 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4979565A GB1101208A (en) | 1965-11-23 | 1965-11-23 | Improvements in or relating to warning devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4979565A GB1101208A (en) | 1965-11-23 | 1965-11-23 | Improvements in or relating to warning devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1101208A true GB1101208A (en) | 1968-01-31 |
Family
ID=10453551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4979565A Expired GB1101208A (en) | 1965-11-23 | 1965-11-23 | Improvements in or relating to warning devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1101208A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2217026A (en) * | 1988-01-20 | 1989-10-18 | Trolex Limited | Voltage sensor |
-
1965
- 1965-11-23 GB GB4979565A patent/GB1101208A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2217026A (en) * | 1988-01-20 | 1989-10-18 | Trolex Limited | Voltage sensor |
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