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Union Switch & Signal

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280: 479:. The production blocks assigned to them in 1943 were between SN's 1,041,405 to 1,096,404. Colt duplicated 4,171 pistols in the 1,088,726 to 1,092,896 SN range. Since only 55,000 1911A1's were produced by US&S, they are highly collectible. The reason for the low production numbers is US&S was the last company awarded a government contract and as requirements were reduced in early 1943, the last contract awarded became the first to be cancelled. As a general rule, US&S produced high quality pistols. With the government-owned machine tooling already in place at US&S, they were offered a subcontract arrangement to produce M1 Carbine components. Only Singer produced fewer 1911A1's at 500 total production. 519: 435:
signals as far back as the 1920s as far abroad as Chile and Italy on early wig wag crossings and flashers. There have been subtle variations in the Teardrop bell over the years ranging from different sized electric coils, inclusion of the patent date on the rain hood, as well as a very early version with a less characteristic rain hood that simply read "UNION, patent pending." This is the least commonly seen variation of the Teardrop. This bell is treasured by many signal collectors for its slow, low pitched ring at an irregular cadence. The production of this bell was discontinued sometime by the 1960s, but WABCO carried replacement castings and service manuals into the 1970s.
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US&S first patented the Model 15A Highway crossing bell on February 20, 1917. The bell has been commonly referred to as the "Teardrop" bell by railroaders and signal fans alike because of its unique shape and thus the name has stuck. This bell has appeared on advertising literature for railroad
318:. In December 1996, US&S merged with the other signaling investments of Ansaldo. As a result of that merger, US&S became a wholly owned subsidiary of Ansaldo STS. The company was renamed Ansaldo STS – USA in January 2009. Ansaldo was acquired by 1467: 451:
9 cylinder rotary engine was manufactured under license by Union Switch & Signal. It was one of the most common engines for fighter planes from different companies and around 10,000 were made at Swissvale.
717: 279: 1665: 743: 725: 1064: 1847: 1842: 1837: 1832: 1051: 863: 310:, a global supplier of signaling, control and automation systems, purchased US&S from American Standard. In November 1993, US&S became a 930: 992: 963: 881: 777: 1827: 1422: 1332: 1117: 333:, near Pittsburgh. The Swissvale plant was closed in 1985 and demolished in 1986. US&S moved manufacturing operations to a facility in 1412: 1357: 1852: 268: 374:. Within several years the company developed an electro-pneumatic system, which was widely adopted by railroads across the country. 1089: 1685: 1322: 17: 355: 231:) in 1988, operating as a wholly-owned company until January 2009, when US&S was renamed "Ansaldo STS USA" to operate as a 1680: 1639: 827: 504: 1482: 1215: 800: 1023: 251:
founded Union Switch & Signal Inc. in 1881, consolidating the assets of the Union Electric Signal Company (founded by
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Collector's Guide to Colt .45 Service Pistols Models of 1911 and 1911A1 by Charles w. Clawson
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and other transit systems. In 1908 the company introduced an electrically controlled highway
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equipment, systems and services. The company was acquired by Ansaldo STS (from 2015,
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Throughout its history, US&S had manufacturing facilities in the borough of
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in 1917, then other owners. In January 2009, it became "Ansaldo STS USA".
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Union Switch & Signal was one of the five contractors (including
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US&S was the only company to make 180 degree electronic bells
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In 1901 US&S developed the first electro-pneumatic automatic
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purchased WABCO and reorganized US&S as a separate division.
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Automatic Block Signalling for Interurban Electric Railways
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control system was built by US&S in 1970, for the
690:– Another US railway signaling company, now part of 411:, supporting bi-directional cab signaling, in 1934. 337:. It maintained a research facility in Pittsburgh. 844:"1968: WABCO Joins Forces with American Standard." 507:made by Union Switch & Signal in 1944 for the 1819: 295:until 1917, when it became a subsidiary of the 176:equipment, communication systems and services, 679:– The other major US railway signaling company 584: 1111: 1024:"Le Rhone Model C, 9 Cylinder, Rotary Engine" 874: 1423:Interoperable Communications Based Signaling 888:. Ansaldo STS. June 25, 2011. Archived from 795: 793: 791: 789: 787: 746:on Ansaldo website (archived, March 8, 2009) 739: 737: 735: 556:Bells, mastils, gate arms and counterweights 1848:Manufacturing companies established in 1881 1843:Manufacturing companies based in Pittsburgh 1358:Automatic Train Protection (United Kingdom) 1063:Vantuono, William C. (September 20, 2011). 803:. Ansaldo STS. May 13, 2011. Archived from 1838:American subsidiaries of foreign companies 1118: 1104: 991:: CS1 maint: location missing publisher ( 962:: CS1 maint: location missing publisher ( 842:American Standard Brands, Piscataway, NJ. 776:: CS1 maint: location missing publisher ( 47: 1028:Smithsonian National Air and Space Museum 952:. Swissvale, Pennsylvania. pp. 9–11. 784: 732: 636:Computer-based traffic management systems 1062: 976: 487: 349: 278: 1323:Advanced Civil Speed Enforcement System 857: 855: 817: 711: 709: 707: 420:Atchison, Topeka & Santa Fe railway 385:. This system was later adopted by the 274: 14: 1833:American companies established in 1881 1820: 1125: 981:. Swissvale, Pennsylvania. p. 33. 928: 811: 340: 1483:Train Protection & Warning System 1099: 1049: 861: 801:"History of Ansaldo - key milestones" 756:American Railway Association (1922). 715: 633:Computer-based manual Control systems 438: 396:In 1923 US&S developed the first 235:of Ansaldo in the Americas and Asia. 1216:Integrated Electronic Control Centre 1006: 852: 704: 345: 1828:1881 establishments in Pennsylvania 1478:Train automatic stopping controller 1398:Continuous Automatic Warning System 628:Central Control signaling equipment 335:Batesburg-Leesville, South Carolina 215:) was an American company based in 24: 1158:Communications-based train control 948:Union Switch & Signal (1914). 931:"Union Switch move sends a signal" 759:The Invention of the Track Circuit 749: 482: 25: 1864: 1077: 1050:McKay, Jim (September 14, 2005). 862:McKay, Jim (September 24, 1993). 847:The History of American Standard. 263:). In 1925 US&S acquired the 1853:Railway signalling manufacturers 1083: 596:Electronic communication systems 517: 496: 53:US&S head office located in 38: 1640:Westinghouse Brake & Signal 1403:ContrĂ´le de vitesse par balises 1269:North American railroad signals 1034: 1016: 1009:Model 14 Electric Crossing Gate 1000: 970: 941: 929:Massey, Steve (March 4, 1993). 922: 864:"Union Switch showing strength" 716:Smith, Brady (March 13, 2014). 683:North American railroad signals 1498:Transmission balise-locomotive 1463:Sistema Controllo Marcia Treno 1373:Automatische treinbeĂŻnvloeding 1259:Application of railway signals 950:Electro-Pneumatic Interlocking 896: 836: 822:. MBI Publishing. p. 55. 430:The "Teardrop" mechanical bell 398:inductive train control system 297:Westinghouse Air Brake Company 243: 33:Union Switch & Signal Inc. 13: 1: 1448:Punktförmige Zugbeeinflussung 1168:European Train Control System 697: 1388:Chinese Train Control System 1178:Radio Electronic Token Block 27:American company (1881–2009) 7: 1153:Centralized traffic control 670: 647:centralized traffic control 585:Wayside signaling equipment 107:; 15 years ago 10: 1869: 1353:Automatic train protection 1011:. Swissvale, Pennsylvania. 910:. University of Pittsburgh 573:Automatic train protection 526:power interlocking machine 238: 1704: 1653: 1645:Westinghouse Rail Systems 1547: 1511: 1503:Transmission Voie-Machine 1348:Automatic train operation 1313: 1300:Track circuit interrupter 1282: 1249: 1201: 1148:Automatic block signaling 1143:Absolute block signalling 1133: 407:.) The company developed 364:power interlocking system 362:US&S built the first 211:(commonly referred to as 209:Union Switch & Signal 193: 183: 169: 159: 141: 131: 119: 101: 91: 83: 73: 62: 46: 37: 1443:Pulse code cab signaling 1368:Automatic Warning System 1274:Railway semaphore signal 1236:Solid State Interlocking 405:pulse code cab signaling 372:East St. Louis, Illinois 366:in the United States, a 291:US&S operated as an 1343:Automatic train control 1090:Union Switch and Signal 1056:Pittsburgh Post-Gazette 935:Pittsburgh Post-Gazette 868:Pittsburgh Post-Gazette 818:Solomon, Brian (2003). 722:Pittsburgh Post-Gazette 568:Automatic train control 383:Boston Elevated Railway 331:Swissvale, Pennsylvania 322:and Ansaldo STS became 312:publicly traded company 147:Swissvale, Pennsylvania 55:Swissvale, Pennsylvania 18:Union Switch and Signal 1519:Level crossing signals 1438:Positive Train Control 1433:Linienzugbeeinflussung 1163:Direct traffic control 677:General Railway Signal 538:Level crossing signals 359: 314:with shares listed on 288: 178:level crossing signals 1241:Westlock Interlocking 1231:Rail operating centre 1193:Train order operation 1188:Track Warrant Control 807:on November 10, 2011. 488:Level crossing signal 469:Singer Sewing Machine 356:position light signal 353: 282: 1363:Automatic train stop 1092:at Wikimedia Commons 849:Accessed 2011-06-11. 762:. New York. p.  578:Automatic train stop 509:Rock Island Railroad 409:coded track circuits 387:New York City Subway 275:Corporate management 1071:. Simmons-Boardman. 908:Historic Pittsburgh 645:Electro-mechanical 424:Kansas City, Kansas 370:design, in 1882 at 341:Product development 293:independent company 269:searchlight signals 265:Hall Signal Company 249:George Westinghouse 223:, which focused on 185:Number of employees 96:George Westinghouse 34: 1203:Signalling control 1127:Railway signalling 1052:"Picking Up Speed" 892:on March 21, 2012. 820:Railroad Signaling 524:US&S Model 14 505:searchlight signal 465:Ithaca Gun Company 439:Wartime production 414:The first digital 360: 299:(WABCO). In 1968, 289: 287:, pictured in 1913 123:First acquired by 32: 1815: 1814: 1625:Smith and Yardley 1088:Media related to 977:US&S (1911). 882:"Ansaldo STS USA" 829:978-0-7603-1360-2 728:on April 9, 2015. 346:Railway signaling 301:American Standard 225:railway signaling 206: 205: 174:Railway signaling 105:January 2009 57:, as seen in 1929 16:(Redirected from 1860: 1691:Transport Canada 1575:General Electric 1512:Crossing signals 1393:Cityflo 650 CBTC 1315:Train protection 1120: 1113: 1106: 1097: 1096: 1087: 1072: 1059: 1041: 1038: 1032: 1031: 1020: 1014: 1013:Bulletin No. 79. 1012: 1004: 998: 997:Bulletin No. 57. 996: 990: 982: 974: 968: 967: 961: 953: 945: 939: 938: 926: 920: 919: 917: 915: 900: 894: 893: 878: 872: 871: 859: 850: 840: 834: 833: 815: 809: 808: 797: 782: 781: 775: 767: 753: 747: 741: 730: 729: 724:. Archived from 713: 521: 500: 324:Hitachi Rail STS 257:William Robinson 229:Hitachi Rail STS 115: 113: 108: 51: 42: 35: 31: 21: 1868: 1867: 1863: 1862: 1861: 1859: 1858: 1857: 1818: 1817: 1816: 1811: 1700: 1649: 1543: 1507: 1309: 1283:Train detection 1278: 1245: 1197: 1129: 1124: 1080: 1075: 1045: 1044: 1039: 1035: 1022: 1021: 1017: 1005: 1001: 984: 983: 975: 971: 955: 954: 946: 942: 927: 923: 913: 911: 902: 901: 897: 880: 879: 875: 860: 853: 841: 837: 830: 816: 812: 799: 798: 785: 769: 768: 754: 750: 744:Ansaldo STS USA 742: 733: 714: 705: 700: 673: 642:control systems 630: 625: 616:Switch machines 611:Railway signals 592:DC code systems 587: 582: 552:flashing lights 533: 532: 531: 530: 529: 522: 513: 512: 511: 503:Mechanism of a 501: 490: 485: 483:Modern products 475:pistols during 441: 432: 381:system for the 348: 343: 277: 246: 241: 189:900 (2005) 186: 162: 155: 149: 136:Ansaldo STS USA 111: 109: 106: 58: 28: 23: 22: 15: 12: 11: 5: 1866: 1856: 1855: 1850: 1845: 1840: 1835: 1830: 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41: 36: 30: 19: 1635:Union Switch 1634: 1539:Wayside horn 1383:Catch points 1290:Axle counter 1221:Interlocking 1173:Moving block 1068: 1055: 1036: 1027: 1018: 1008: 1002: 978: 972: 949: 943: 934: 924: 912:. Retrieved 907: 898: 890:the original 885: 876: 867: 846: 838: 819: 813: 805:the original 758: 751: 726:the original 721: 663: 654: 601:interlocking 477:World War II 454: 442: 433: 413: 401: 395: 376: 361: 328: 305: 290: 247: 221:Pennsylvania 212: 208: 207: 142:Headquarters 63:Company type 29: 1797:Switzerland 1772:New Zealand 1767:Netherlands 1473:Slide fence 1226:Lever frame 1069:Railway Age 599:Electronic 550:8" and 12" 449:Le RhĂ´ne 9C 445:World War I 443:During the 308:Ansaldo STS 244:Early years 200:Ansaldo STS 161:Area served 78:Electronics 1822:Categories 1705:By country 1488:Train stop 1453:RS4 Codici 1211:Block post 1007:US&S. 698:References 471:) to make 379:train stop 233:subsidiary 217:Pittsburgh 67:Subsidiary 1712:Australia 1565:AĹ˝D Praha 1524:Crossbuck 1428:Crocodile 987:cite book 958:cite book 772:cite book 564:equipment 547:mechanism 543:Model 95 416:rail yard 368:pneumatic 354:US&S 326:in 2019. 306:In 1988, 283:US&S 255:inventor 165:Worldwide 132:Successor 1802:Thailand 1610:Safetran 1600:Magnetic 1585:Griswold 1534:E-signal 914:June 13, 688:Safetran 671:See also 649:machines 402:See also 213:US&S 170:Products 74:Industry 1747:Germany 1737:Finland 1722:Belgium 1717:Bavaria 1620:Siemens 1595:Hitachi 1570:Federal 1555:Adtranz 1458:SelTrac 1305:Treadle 1251:Signals 692:Siemens 473:M1911A1 320:Hitachi 239:History 112:2009-01 110: ( 102:Defunct 92:Founder 84:Founded 69:(1917–) 1792:Sweden 1787:Poland 1782:Norway 1752:Greece 1742:France 1727:Canada 1630:Thales 1560:Alstom 1529:Wigwag 1408:EBICAB 1378:Balise 826:  606:Relays 528:(1922) 467:, and 358:, 1922 316:Nasdaq 202:(1988) 195:Parent 1762:Japan 1757:Italy 1732:China 1666:AREMA 1615:Saxby 1468:SACEM 1413:IIATS 1338:ATACS 1183:Token 125:WABCo 1686:IRSE 1681:HMRI 1590:Hall 1333:ASFA 1328:ALSN 993:link 964:link 916:2016 824:ISBN 778:link 655:Note 545:gate 457:Colt 447:the 153:U.S. 120:Fate 87:1881 1696:UIC 1676:FRA 1671:ERA 1661:AAR 1580:GRS 422:at 400:. 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Index

Union Switch and Signal


Swissvale, Pennsylvania
Subsidiary
Electronics
George Westinghouse
WABCo
Ansaldo STS USA
Swissvale, Pennsylvania
U.S.
Railway signaling
level crossing signals
Parent
Ansaldo STS
Pittsburgh
Pennsylvania
railway signaling
Hitachi Rail STS
subsidiary
George Westinghouse
track circuit
William Robinson
interlockings
Hall Signal Company
searchlight signals

signal bridge
independent company
Westinghouse Air Brake Company

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