FR1007491A - Ultra-shortwave approach or proximity detectors - Google Patents

Ultra-shortwave approach or proximity detectors

Info

Publication number
FR1007491A
FR1007491A FR1007491DA FR1007491A FR 1007491 A FR1007491 A FR 1007491A FR 1007491D A FR1007491D A FR 1007491DA FR 1007491 A FR1007491 A FR 1007491A
Authority
FR
France
Prior art keywords
shortwave
ultra
approach
proximity detectors
detectors
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
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Union Switch and Signal Inc filed Critical Union Switch and Signal Inc
Application granted granted Critical
Publication of FR1007491A publication Critical patent/FR1007491A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR1007491D 1949-06-04 1949-12-30 Ultra-shortwave approach or proximity detectors Expired FR1007491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1007491XA 1949-06-04 1949-06-04

Publications (1)

Publication Number Publication Date
FR1007491A true FR1007491A (en) 1952-05-06

Family

ID=22281333

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1007491D Expired FR1007491A (en) 1949-06-04 1949-12-30 Ultra-shortwave approach or proximity detectors

Country Status (1)

Country Link
FR (1) FR1007491A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215409B (en) * 1958-09-08 1966-04-28 Gen Motors Corp Device for monitoring the speed of road vehicles
DE1277601B (en) * 1963-06-14 1968-09-12 Klaus Klotzek Circuit arrangement for determining the speed, acceleration, direction of movement, presence and number of moving objects

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215409B (en) * 1958-09-08 1966-04-28 Gen Motors Corp Device for monitoring the speed of road vehicles
DE1277601B (en) * 1963-06-14 1968-09-12 Klaus Klotzek Circuit arrangement for determining the speed, acceleration, direction of movement, presence and number of moving objects

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