IT454470A - - Google Patents

Info

Publication number
IT454470A
IT454470A IT454470DA IT454470A IT 454470 A IT454470 A IT 454470A IT 454470D A IT454470D A IT 454470DA IT 454470 A IT454470 A IT 454470A
Authority
IT
Italy
Application number
Other languages
Italian (it)
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.)
Publication of IT454470A publication Critical patent/IT454470A/it

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
    • B61L3/12—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 using magnetic or electrostatic induction; using radio waves
    • B61L3/125—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 using magnetic or electrostatic induction; using radio waves using short-range radio transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/762—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with special measures concerning the radiation pattern, e.g. S.L.S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
IT454470D 1947-09-23 IT454470A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US775588A US2509331A (en) 1947-09-23 1947-09-23 Railway train interval detection system

Publications (1)

Publication Number Publication Date
IT454470A true IT454470A (xx)

Family

ID=25104864

Family Applications (1)

Application Number Title Priority Date Filing Date
IT454470D IT454470A (xx) 1947-09-23

Country Status (2)

Country Link
US (1) US2509331A (xx)
IT (1) IT454470A (xx)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128975A (en) * 1964-04-14 Preventive detector car
US2702342A (en) * 1948-11-20 1955-02-15 Rca Corp Traffic control by radar
US2691093A (en) * 1950-05-23 1954-10-05 Westinghouse Air Brake Co Approach route control apparatus, including train carried control means for railway track switches and associated signals
US2841782A (en) * 1954-06-15 1958-07-01 Hazeltine Research Inc Equipment monitoring apparatus for radar system
US2895042A (en) * 1956-04-27 1959-07-14 Gen Railway Signal Co Railway signaling system for the protection of trains incapable of reliably shunting track circuits
US2921301A (en) * 1956-07-06 1960-01-12 Parsons Co Ralph M Distance measuring system
US3038066A (en) * 1957-07-02 1962-06-05 Barry Leonard Dodge Train to train and track to train control
US3235025A (en) * 1964-04-20 1966-02-15 Gen Motors Corp Collision prevention system
DE2139617C3 (de) * 1971-08-07 1974-09-05 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Anordnung zur kontinuierlichen Messung des Abstandes zwischen zwei aufeinanderfolgenden spurgebundenen Objekten

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556633A (en) * 1924-09-13 1925-10-13 Ruben Samuel Electrical control method
DE649487C (de) * 1934-08-18 1937-08-30 Auxiliaire D Etudes Electrotec Vorrichtung zur Sicherung von Eisenbahnen
US2134716A (en) * 1936-10-20 1938-11-01 Gunn Ross Measuring speed and distance by radiant energy
US2405238A (en) * 1940-04-13 1946-08-06 Rca Corp Position determining system

Also Published As

Publication number Publication date
US2509331A (en) 1950-05-30

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