GB521386A - Magnetic apparatus for detecting the passage of vehicles and other traffic - Google Patents
Magnetic apparatus for detecting the passage of vehicles and other trafficInfo
- Publication number
- GB521386A GB521386A GB14440/39A GB1444039A GB521386A GB 521386 A GB521386 A GB 521386A GB 14440/39 A GB14440/39 A GB 14440/39A GB 1444039 A GB1444039 A GB 1444039A GB 521386 A GB521386 A GB 521386A
- Authority
- GB
- United Kingdom
- Prior art keywords
- traffic
- passage
- detecting
- vehicles
- aug
- 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
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Traffic Control Systems (AREA)
Abstract
521,386. Road signals for controlling traffic ; magnetic tests. AUTOMATIC SIGNAL CORPORATION. Aug. 15, 1938, No. 14440/39. Convention date, Aug. 14, 1937. Divided out of 521,339. [Class 118 (ii)] [Also in Group XXXVI] A detector for detecting the passage of traffic containing magnetisable material comprises coils 12, 13 connected in parallel and linked with the field produced by magnetic bars 10 arranged transversely to the direction of traffic. A third coil 14 may be connected in series opposition, the coils being mounted in a watertight casing 17 on a tube 15, held in position by cones 16.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US159059A US2201146A (en) | 1937-08-14 | 1937-08-14 | Traffic detector |
Publications (1)
Publication Number | Publication Date |
---|---|
GB521386A true GB521386A (en) | 1940-05-20 |
Family
ID=22570911
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24005/38A Expired GB521339A (en) | 1937-08-14 | 1938-08-15 | Magnetic apparatus for detecting the passage of vehicles and other traffic |
GB14440/39A Expired GB521386A (en) | 1937-08-14 | 1938-08-15 | Magnetic apparatus for detecting the passage of vehicles and other traffic |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24005/38A Expired GB521339A (en) | 1937-08-14 | 1938-08-15 | Magnetic apparatus for detecting the passage of vehicles and other traffic |
Country Status (3)
Country | Link |
---|---|
US (1) | US2201146A (en) |
FR (1) | FR841919A (en) |
GB (2) | GB521339A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2448020A (en) * | 1943-05-17 | 1948-08-31 | Richard C Darnell | Device for hidden explosive mines |
FR956774A (en) * | 1944-05-18 | 1950-02-07 | ||
US2996663A (en) * | 1944-08-17 | 1961-08-15 | Bell Telephone Labor Inc | Magnetic field gradiometer |
US2450166A (en) * | 1944-08-18 | 1948-09-28 | Nicholas S Rich | Electrical detection apparatus |
USRE29019E (en) * | 1969-01-22 | 1976-10-26 | Yeda Research & Development Co. Ltd. | Intruder detection system |
US3754223A (en) * | 1970-01-21 | 1973-08-21 | Yeda Res & Dev | Intruder detection system |
US3747036A (en) * | 1972-01-17 | 1973-07-17 | Honeywell Inc | Magnetic line sensor |
US4943805A (en) * | 1986-11-13 | 1990-07-24 | Dennison James L | Conduit-enclosed induction loop for a vehicle detector |
EP1647959B1 (en) * | 2004-10-16 | 2006-10-11 | SkiData AG | Vehicle detection system |
US11712637B1 (en) | 2018-03-23 | 2023-08-01 | Steven M. Hoffberg | Steerable disk or ball |
-
1937
- 1937-08-14 US US159059A patent/US2201146A/en not_active Expired - Lifetime
-
1938
- 1938-08-09 FR FR841919D patent/FR841919A/en not_active Expired
- 1938-08-15 GB GB24005/38A patent/GB521339A/en not_active Expired
- 1938-08-15 GB GB14440/39A patent/GB521386A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2201146A (en) | 1940-05-21 |
GB521339A (en) | 1940-05-20 |
FR841919A (en) | 1939-06-01 |
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