GB543322A - Apparatus for observing the movement of traffic near a given point - Google Patents
Apparatus for observing the movement of traffic near a given pointInfo
- Publication number
- GB543322A GB543322A GB1522940A GB1522940A GB543322A GB 543322 A GB543322 A GB 543322A GB 1522940 A GB1522940 A GB 1522940A GB 1522940 A GB1522940 A GB 1522940A GB 543322 A GB543322 A GB 543322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- observing
- spring
- given point
- movement
- traffic
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
543,322. Train-actuated electric contact devices. CRONIN, B. A. Oct. 14, 1940; No. 15229. [Class 105] [Also in Group XXXVIII] An apparatus for observing the passage of vehicles past a given point comprises a spring M fixed at one end and provided at its free end with a contact piece that completes. the electric circuit IC of a visual indicator or relay when the spring is oscillated by vibrations produced by passing traffic. The spring is mounted in a casing C secured to a metal tube T which is fixed rigidly in the ground at the point of observation. The apparatus may be used for observing road or rail traffic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1522940A GB543322A (en) | 1940-10-14 | 1940-10-14 | Apparatus for observing the movement of traffic near a given point |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1522940A GB543322A (en) | 1940-10-14 | 1940-10-14 | Apparatus for observing the movement of traffic near a given point |
Publications (1)
Publication Number | Publication Date |
---|---|
GB543322A true GB543322A (en) | 1942-02-19 |
Family
ID=10055336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1522940A Expired GB543322A (en) | 1940-10-14 | 1940-10-14 | Apparatus for observing the movement of traffic near a given point |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB543322A (en) |
-
1940
- 1940-10-14 GB GB1522940A patent/GB543322A/en not_active Expired
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