238000005859 coupling reaction Methods 0.000 description 3.230000001276 controlling effect Effects 0.000 claims description 4.238000001514 detection method Methods 0.000 claims description 9.230000000875 corresponding Effects 0.000 claims description 18.230000005540 biological transmission Effects 0.000 claims abstract description 16.230000001702 transmitter Effects 0.000 claims abstract description 50.MERGER Assignors: WESTINGHOUSE AIR BRAKE COMPANY Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links reassignment AMERICAN STANDARD INC., A DE CORP. Assigned to AMERICAN STANDARD INC., A DE CORP. Assignors: AMERICAN STANDARD, INC., A CORP OF DE. reassignment UNION SWITCH & SIGNAL INC., 5800 CORPORATE DRIVE, PITTSBURGH, PA., 15237, A CORP OF DE. 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 Westinghouse Air Brake Co filed Critical Westinghouse Air Brake Co Priority to US05/719,336 priority Critical patent/US4026506A/en Application granted granted Critical Publication of US4026506A publication Critical patent/US4026506A/en Assigned to UNION SWITCH & SIGNAL INC., 5800 CORPORATE DRIVE, PITTSBURGH, PA., 15237, A CORP OF DE. Original Assignee Westinghouse Air Brake Co 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 or warranty as to the accuracy of the list.) Buzzard Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/719,336 Inventor Thomas J. Google Patents Transmitting loop arrangement for railroad cab signal and speed control systemĭownload PDF Info Publication number US4026506A US4026506A US05/719,336 US71933676A US4026506A US 4026506 A US4026506 A US 4026506A US 71933676 A US71933676 A US 71933676A US 4026506 A US4026506 A US 4026506A Authority US United States Prior art keywords section loop cab signal signal track Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4026506A - Transmitting loop arrangement for railroad cab signal and speed control system On Friday, Health Minister Karl Lauterbach declared that Germany is clearly facing up the beginning of an autumn and winter fresh wave, but that her country is now better prepared than it was a year ago.US4026506A - Transmitting loop arrangement for railroad cab signal and speed control system If the pandemic situation worsens, authorities may require mandatory coronavirus testing at schools and day-care centers, as well as the mandatory use of face masks, if necessary, in order to keep classes open, but only from the fifth grade onwards (11 years), or impose new provisions. Employees must be tested several times a week.Īccording to the European Union (EU) standard EN 149, FFP face masks are divided into three classes according to their filtering effectiveness, in the case of FFP2 reaching up to 92% protection.Īs a further regulation, EU authorities may also introduce the mandatory use of face masks in trains and local buses, as well as in indoor areas such as stores, restaurants and assembly halls. In the latter two centers, people will also have to submit a negative Covid-19 test before entering. Local authorities have imposed to wear protective FFP2 overloop NR face masks 5s – instead of surgical face masks- on long-distance trains for people aged over 14, as well as in hospitals, nursing homes and doctors’ offices.
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