FR973924A - Appareil de détection du passage des objets - Google Patents
Appareil de détection du passage des objetsInfo
- Publication number
- FR973924A FR973924A FR973924DA FR973924A FR 973924 A FR973924 A FR 973924A FR 973924D A FR973924D A FR 973924DA FR 973924 A FR973924 A FR 973924A
- Authority
- FR
- France
- Prior art keywords
- passage
- objects
- detecting
- 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
- G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28895/47A GB647268A (en) | 1947-10-29 | 1947-10-29 | Improvements in or relating to apparatus for use in detecting the passage of wheeledvehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
FR973924A true FR973924A (fr) | 1951-02-16 |
Family
ID=10282918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR973924D Expired FR973924A (fr) | 1947-10-29 | 1948-10-22 | Appareil de détection du passage des objets |
Country Status (3)
Country | Link |
---|---|
US (1) | US2550970A (fr) |
FR (1) | FR973924A (fr) |
GB (1) | GB647268A (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2976888A (en) * | 1957-05-24 | 1961-03-28 | Henry H Merriman | Coupling for tube expander |
US3090401A (en) * | 1958-11-12 | 1963-05-21 | Calpat Products Inc | Street hose for pneumatically actuated parking meter |
US9978270B2 (en) | 2014-07-28 | 2018-05-22 | Econolite Group, Inc. | Self-configuring traffic signal controller |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2074443A (en) * | 1930-12-09 | 1937-03-23 | Benjamin M Walpole | Self-actuated traffic signal system |
US2037583A (en) * | 1932-11-16 | 1936-04-14 | Kidde & Co Walter | Actuating mechanism for aeroplane flotation devices |
-
1947
- 1947-10-29 GB GB28895/47A patent/GB647268A/en not_active Expired
-
1948
- 1948-10-11 US US53778A patent/US2550970A/en not_active Expired - Lifetime
- 1948-10-22 FR FR973924D patent/FR973924A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB647268A (en) | 1950-12-06 |
US2550970A (en) | 1951-05-01 |
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