GB859049A - Road vehicle detector - Google Patents
Road vehicle detectorInfo
- Publication number
- GB859049A GB859049A GB7145/57A GB714557A GB859049A GB 859049 A GB859049 A GB 859049A GB 7145/57 A GB7145/57 A GB 7145/57A GB 714557 A GB714557 A GB 714557A GB 859049 A GB859049 A GB 859049A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- contact
- contacts
- base
- vehicle
- 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)
- Traffic Control Systems (AREA)
Abstract
859,049. Road traffic detectors. EASTERN INDUSTRIES Inc. March 4, 1957 [March 5, 1956], No. 7145/57. Class 118 (2). A multi-contact road pad comprises an elongated base 5 extending across the traffic lane perpendicular to it, and a number of elongated contacts 3, 4 supported on the base in side-by-side relation and arranged at a slight angle (e.g. 1 inch in 8 feet) with respect to the longitudinal axis of the base to provide overlapping actuation of the successive switch contacts by a pair of transversely spaced wheels 8, 9 of an axle. The unit is covered by a watertight resilient casing 1. For a vehicle moving in the direction shown in Fig. 3, contact 3 closes to energize relay IF which in turn energizes relay 2F. As the vehicle moves on, contact 4 closes energizing relay IR which provides a hold circuit for relay 2F. Further movement opens contact 3 releasing relay IF, relay 2F remaining energized over the contacts of relay 1R. Relay 3F is energized over contacts 2F2 and 1F3 and completes a self-holding circuit over contact 3F1. When the vehicle moves clear of the pad, relays 1R, 2F release and a " forward counter " FC operates, this releases relay 3F, and the equipment restores to normal. Passage of a vehicle in the reverse direction operates a " reverse counter " RC, by a similar sequence of events.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US859049XA | 1956-03-05 | 1956-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB859049A true GB859049A (en) | 1961-01-18 |
Family
ID=22194751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7145/57A Expired GB859049A (en) | 1956-03-05 | 1957-03-04 | Road vehicle detector |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB859049A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2144230A (en) * | 1983-07-01 | 1985-02-27 | Blue Circle Ind Plc | Improvements in weighbridges |
| WO1990002410A1 (en) * | 1988-08-17 | 1990-03-08 | James Robert Fisher | Speed detector |
| AU647012B2 (en) * | 1988-08-17 | 1994-03-17 | James Robert Fisher | Speed detector |
-
1957
- 1957-03-04 GB GB7145/57A patent/GB859049A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2144230A (en) * | 1983-07-01 | 1985-02-27 | Blue Circle Ind Plc | Improvements in weighbridges |
| WO1990002410A1 (en) * | 1988-08-17 | 1990-03-08 | James Robert Fisher | Speed detector |
| US5115109A (en) * | 1988-08-17 | 1992-05-19 | Fisher James R | Speed detector for traffic control |
| AU647012B2 (en) * | 1988-08-17 | 1994-03-17 | James Robert Fisher | Speed detector |
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