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Tightlock was generally a success in the UK, but there were reliability issues and some notable incidents occurred where trains divided in service. The constant couple-uncouple cycles of heavy London commuter services caused the couplers' mechanisms to wear out faster than expected.
625:
units were the first stock to incorporate this. Air-operated
Tightlock couplers were chosen, together with underslung electrical connector boxes controlled by a Drum switch, and this allowed drivers to single-handedly attach or split a train without having to leave the cab.
721:'s Networker fleet was particularly susceptible to this and the company blamed its drivers in the media, then changed its coupling instructions to drivers to include a "push-on, pull off" power test and visual inspection to ensure that the knuckles had engaged fully.
616:
had required a shunter to get down onto the track and stand between the two units to manually trip the coupler mechanism as well as connect or disconnect the air pipes and electrical jumper leads. In order to reduce staffing costs and cut down station dwell times,
486:
In Europe, some operators experimented with making fully automatic tightlock couplers by adding integral pneumatic and electric connectors, but these connections proved unreliable, and most have switched to the more common fully automatic
760:
822:
787:
468:. They have mechanical features that reduce slack in normal operation and prevent telescoping in derailments, yet remain compatible with other Janney types used by North American freight railroads.
854:
803:
838:
471:
Like all Janney couplers, the
Tightlock is "semi-automatic". The couplers automatically lock when cars are pushed together, but workers must go between cars to hook up the
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and other communications. To separate cars, a worker must use a lever to move the locking pin that keeps the coupler closed.
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would be preferable. All subsequent units were built with these, and their earlier examples were eventually modified.
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in 1971 when passenger service was nationalized in the United States from most private railway companies to Amtrak.
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84:
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509:, the nominal mounting height for the coupler (rail top to coupler center) is 33 inches (838 mm), with a
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AAR Manual of
Standards and Recommended Practices, Section S, Part I:Casting Details, Issue 06/2007
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All multiple-unit trains built for the UK since then have been equipped with
Dellner couplings.
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TypeH TightLock
Coupler Developed And First Used 1928 In North America On New York Central RR
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passenger trains in the UK built from the mid 1970s onwards. The previous generation of
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looked to incorporate an automatic coupler mechanism in its new power-door trains.
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523: ± 1 inch (876 ± 25 mm) maximum height on empty cars and
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1045:
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537: ± 1 inch (800 ± 25 mm) minimum height on loaded cars.
103:
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74:
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TypeH TightLock
Coupler Made AAR APT Standard In 1947 For Passenger Stock
1007:
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399:
295:
1050:
494:
Janney Type H Tightlock coupler standards were established by the
194:
157:
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797:
cab car with separate air brake and head end power connections
544:
867:
EMU with separate air brake and head end power connections
832:
EMU with integral air brake and head end power connections
561:
816:
with integral air brake and head end power connections
1178:
1109:
1088:
926:, lists the coupler(s) used on any railway system
588:, are another variety, typical on North American
1004:Connex blames its drivers as trains come apart
1066:
755:Type H Tightlock couplers and Type F couplers
433:
8:
731:had been built with Tightlock couplers for
1073:
1059:
1051:
500:American Public Transportation Association
440:
426:
18:
604:Type H couplers are in widespread use on
904:Changes to the Janney coupler since 1873
584:couplers, often mistaken for the Type H
498:, which transferred the standard to the
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753:
309:
253:
129:
61:
26:
724:By the early 2000s the first batch of
7:
629:Classes of train equipped included:
848:with integral air brake connections
600:Tightlock use in the United Kingdom
739:, but it was quickly decided that
14:
496:Association of American Railroads
884:
872:
853:
837:
821:
802:
793:Type H Tightlock couplers on an
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759:
548:
409:
34:
844:Type H Tightlock couplers on a
828:Type H Tightlock couplers on a
809:Type H Tightlock couplers on a
766:Type H Tightlock couplers on a
1:
225:Passenger traffic terminology
1101:Railway coupling conversion
1096:Railway coupling by country
945:Railway coupling by country
1223:
456:couplers are a variety of
891:Type F Interlock couplers
879:Type F Interlock couplers
614:Buckeye/Henricot couplers
338:List of high-speed trains
935:Multi-function couplers
479:and connect cables for
240:Railway nationalization
16:Type of railcar coupler
1126:Type F & H :
930:Length over headstocks
830:British Rail Class 321
726:Bombardier Electrostar
507:standard-gauge railway
348:Longest train services
230:Named passenger trains
924:Jane's World Railways
363:Platform screen doors
1150:Scharfenberg coupler
1122:Janney / AAR coupler
737:Connex South Eastern
733:Connex South Central
719:Connex South Eastern
489:Scharfenberg coupler
460:, typically used on
416:Transport portal
368:Railway speed record
1145:Unicoupler/Intermat
955:Safety of tank cars
466:passenger rail cars
343:List of train songs
220:High-speed railways
173:Couplers by country
22:Part of a series on
1155:Norwegian coupling
1128:Tightlock coupling
919:Gangway connection
582:Vertical InterLock
560:. You can help by
178:Coupler conversion
1194:
1193:
1117:Buffers and chain
965:Three-point hitch
950:Rotary car dumper
741:Dellner couplings
578:
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168:Railway couplings
151:Steam locomotives
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1082:Railway coupling
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861:Henricot coupler
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592:that go through
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477:pneumatic brakes
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114:Gauge conversion
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1042:Coupler Adapter
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200:Passenger train
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1018:External links
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1011:16 August 1999
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993:Type F coupler
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846:JNR Class EF65
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779:head end power
773:with separate
768:California Car
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594:rotary dumpers
590:gondola wagons
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481:head-end power
462:North American
458:Janney coupler
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62:Infrastructure
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28:Rail transport
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1160:Dual coupling
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1140:C-AKv coupler
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865:SNCB Class 75
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606:multiple unit
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569:December 2021
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556:This section
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284:Rapid transit
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210:Regional rail
208:
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205:Commuter rail
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195:Bogie (truck)
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183:Dual coupling
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163:Railroad cars
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132:rolling stock
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92:Railway track
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52:Company types
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33:
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29:
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21:
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1044:: Janney To
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979:
960:Slack action
745:
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715:
628:
619:British Rail
612:fitted with
603:
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562:adding to it
557:
504:
493:
485:
470:
453:
451:
130:Service and
1135:SA3 coupler
1046:SA3 coupler
781:connections
580:AAR Type F
378:Terminology
323:Attractions
310:Miscellanea
146:Locomotives
104:Track gauge
97:Maintenance
1179:Categories
1170:Draft gear
972:References
909:Draft gear
729:Class 375s
541:AAR Type F
328:By country
279:Interurban
274:Light rail
119:Dual gauge
70:Management
811:Networker
775:air brake
710:Class 508
705:Class 507
700:Class 466
695:Class 465
690:Class 357
685:Class 365
680:Class 323
675:Class 322
670:Class 321
665:Class 320
660:Class 319
655:Class 318
650:Class 317
645:Class 315
640:Class 314
635:Class 313
623:Class 313
586:Tightlock
473:air lines
464:mainline
454:Tightlock
353:Modelling
333:Companies
318:Accidents
141:Operating
75:Rail yard
1207:Couplers
1201:Category
1186:Couplers
1008:BBC News
897:See also
475:for the
400:Vactrain
190:Wheelset
1165:Drawbar
1110:Systems
1089:General
1037:Article
914:Drawbar
863:on an
771:cab car
750:Gallery
532:⁄
518:⁄
452:Type H
373:Suicide
358:Museums
289:History
267:History
245:Freight
47:History
296:Maglev
158:Trains
505:On a
301:Urban
795:MBTA
777:and
735:and
262:Tram
85:list
814:EMU
564:.
1203::
596:.
525:31
511:34
491:.
394:UK
392:,
390:NZ
388:,
386:NA
384:,
382:AU
1074:e
1067:t
1060:v
571:)
567:(
534:2
530:1
527:+
520:2
516:1
513:+
441:e
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380:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
