961:
152:, which frustrates unauthorised access attempts and indicates to the lock's owner that it has been interfered with. When someone tries to pick the lock or to open it using the wrong key, the lock is designed to jam in a locked state until (depending on the lock) either a special regulator key or the original key is inserted and turned in a different direction. This alerts the owner to the fact that the lock has been tampered with.
1519:
36:
1554:
1542:
1530:
237:
208:
268:
Jeremiah, Charles, his son John and others resulted in a six-lever version. A later innovation was the "curtain", a disc that allowed the key to pass but narrowed the field of view, hiding the levers from anybody attempting to pick the lock. In due course Chubb began to manufacture brass padlocks incorporating the "detector" mechanism.
133:
281:(ÂŁ210 and equivalent to ÂŁ24,600 in 2023) to anybody who could devise a method of picking it. In 1832, a Mr Hart, replying to a challenge by Chubb, failed to pick one of his detector locks. After a number of people tried and failed, the first person to pick the six-lever Chubb lock was the American locksmith
155:
Any person who attempts to pick a detector lock must avoid triggering the automatic jamming mechanism. If the automatic jamming mechanism is accidentally triggered (which happens when any one of the levers is lifted too high) the lock-picker has the additional problem of resetting the detector
267:
A number of improvements were made to the original design but the basic principle behind its construction remained unchanged. In 1824, Charles patented an improved design that no longer required a special regulator key to reset the lock. The original lock used four levers, but by 1847 work by
156:
mechanism before the next attempt to open the lock. This introduces additional complexity into the task, increasing the degree of lock-picking skill required to a level which few people have. The first detector lock was produced in 1818 by
Jeremiah Chubb of
317:", Holmes asks "Is it a simple key?" to which Mrs Marker, an elderly maid, replies, "No, sir, it is a Chubb's key." In both of these stories, the description makes clear that the lock could not have been picked, a minor clue in solving each mystery. In
276:
Competition in the lock business was fierce and there were various challenges issued in an attempt to prove the superiority of one type of lock over another. Joseph Bramah exhibited one of his locks in the window of his shop and offered 200
204:, and was tripped when an individual lever was pushed past the position required to bring the lever in line to open the lock. This innovation was sufficient for Jeremiah to claim the ÂŁ100 reward on offer (equivalent to ÂŁ9,200 in 2023).
437:"Locks and Safes. The construction of locks; compiled from the papers of A. C. Hobbs, ... and edited by C. Tomlinson. ... To which is added a description of ... J. B. Fenby's patent locks, and a note upon iron safes. By R. Mallet"
227:
the lock. The convict, who had successfully picked every lock with which he had been presented, was confident he could do the same with the detector lock. After two or three months of trying he admitted defeat.
200:, Jeremiah developed a four-lever lock that, when subjected to attempted picking, or use of the wrong key, would stop working until a special key was used to reset it. This security feature was known as a
622:
256:, the lockmaking capital of Great Britain, and opened a factory in Temple Street. In 1836 they moved to St James' Square in the same town. A further move to the site of the old
184:
to announce a competition to produce a lock that could be opened only with its own unique key. In response, Jeremiah Chubb, who was working with his brother,
348:, set in 1837, has a Chubb lock on the door of the Bareknuckles Bastard's smuggling warehouse. Lady Felicity Faircloth cannot pick it on her first attempt.
705:
875:
602:
551:
490:
314:
53:
394:
380:
743:
1545:
592:
533:
461:
419:
223:
in
Portsmouth Docks was given the Chubb lock with a promise of a free pardon from the Government and ÂŁ100 from Jeremiah if he could
119:
626:
573:
Freeman, R. Austin. Complete Works of R. Austin
Freeman (Delphi Classics) (Series Six Book 14) . Delphi Classics. Kindle Edition.
100:
1579:
72:
511:
261:
1464:
738:
57:
79:
1398:
556:
1377:
1124:
698:
260:
in
Railway Street followed in 1838. The Chubb lock reportedly became popular as a result of the interest generated when
409:
1479:
1469:
800:
436:
185:
663:
451:
181:
86:
868:
769:
46:
1337:
779:
193:
366:
68:
1221:
1134:
728:
1438:
1392:
1322:
1119:
691:
1499:
1494:
1010:
853:
1522:
1433:
1266:
960:
861:
278:
1403:
1357:
1294:
1256:
1155:
1027:
980:
528:
310:
282:
165:
164:, as the result of a government competition to create an unpickable lock. It remained unpicked until
606:
1553:
1352:
1261:
1104:
1032:
842:
774:
1139:
1099:
561:
538:
306:
145:
93:
1474:
1201:
1094:
945:
588:
486:
457:
415:
318:
1533:
1387:
1246:
1114:
1089:
290:
149:
1484:
1448:
1413:
1382:
1165:
1160:
925:
764:
515:
302:
177:
1557:
508:
1443:
1418:
1309:
1251:
915:
910:
896:
795:
714:
286:
313:", Holmes describes a house with a "Chubb lock to the door." In another short story, "
1573:
1362:
1342:
975:
935:
930:
479:
341:
326:
253:
212:
197:
1408:
1317:
1284:
1276:
1236:
1186:
1170:
1063:
1015:
995:
892:
888:
884:
805:
411:
LOCKS, SAFES, AND SECURITY: An
International Police Reference Two Volumes (2nd Ed.)
224:
642:
244:
In 1820, Jeremiah joined his brother
Charles in starting their own lock company,
1504:
1489:
1423:
1332:
1241:
1191:
1084:
920:
810:
759:
334:
245:
220:
35:
192:, invented and patented his detector lock in 1818. Building on earlier work by
1367:
1216:
1048:
249:
189:
157:
17:
683:
1347:
1327:
1289:
1211:
1206:
1129:
1068:
985:
257:
236:
207:
667:
1428:
1299:
1226:
1058:
1020:
990:
950:
940:
1109:
1053:
1005:
1000:
161:
132:
1372:
397:. Canadian National Railways. July 27, 1960 – via Google Books.
1231:
733:
264:
accidentally sat on a Chubb lock that still had the key inserted.
235:
206:
131:
857:
687:
29:
240:
A small Chubb detector lock from a gun case (circa 1910)
603:"Lock Making: Chubb & Son's Lock & Safe Co Ltd"
453:
Locksmith and
Security Professionals' Exam Study Guide
1457:
1308:
1275:
1179:
1148:
1077:
1041:
968:
903:
835:
819:
788:
752:
721:
60:. Unsourced material may be challenged and removed.
605:. Wolverhampton City Council. 2005. Archived from
478:
329:says: “Burglars don’t try to pick Chubb locks.”
219:A locksmith who was a convict aboard one of the
869:
699:
435:York.), A. C. HOBBS (of New (July 27, 1868).
8:
647:Encyclopaedia of Locks and Builders Hardware
180:was carried out using false keys, prompting
585:The Complete Book of Locks and Locksmithing
876:
862:
854:
706:
692:
684:
188:, as a ship's outfitter and ironmonger in
383:. July 27, 1922 – via Google Books.
120:Learn how and when to remove this message
357:
301:Chubb locks are mentioned twice in the
408:Tobias, Marc Weber (January 1, 2000).
332:A Chubb lock is featured in the novel
552:The Adventure of the Golden Pince-Nez
369:. M. Joseph – via Google Books.
315:The Adventure of the Golden Pince-Nez
148:with an integral security feature, a
7:
1541:
1529:
744:UTC Climate, Controls & Security
583:Roper, C.A.; Phillips, Bill (2001).
450:Phillips, Bill (December 15, 2008).
58:adding citations to reliable sources
477:Grunfeld, Nina (October 27, 1984).
211:The Chubb works in Railway Street,
365:Ullyett, Kenneth (July 27, 1963).
25:
534:The Adventures of Sherlock Holmes
381:"The Architect and Building News"
1552:
1540:
1528:
1518:
1517:
959:
248:. They moved from Portsmouth to
136:Diagram of a Chubb detector lock
34:
45:needs additional citations for
1465:Glossary of locksmithing terms
739:International Comfort Products
495:– via Internet Archive.
414:. Charles C Thomas Publisher.
1:
1399:Perimeter intrusion detection
557:The Return of Sherlock Holmes
1378:Miniature snap-action switch
1125:Time-delay combination locks
664:"Lockpicking for Lockmakers"
497:george IV sat on chubb lock.
456:. McGraw Hill Professional.
232:Manufacture and improvements
1480:John M. Mossman Lock Museum
1470:Electromagnetic door holder
666:. Old Locks. Archived from
1596:
770:The Pyrene Company Limited
715:Carrier Global Corporation
587:. McGraw-Hill Publishing.
27:Type of lever tumbler lock
1513:
1338:Closed-circuit television
957:
780:Read and Campbell Limited
729:Chubb Fire & Security
466:– via Google Books.
439:– via Google Books.
424:– via Google Books.
346:Wicked and the Wallflower
1222:Kensington Security Slot
1135:Tubular pin tumbler lock
481:The Royal Shopping Guide
182:Her Majesty's Government
1580:Locks (security device)
1439:Vandal-resistant switch
1393:Passive infrared sensor
1323:Alarm monitoring center
1120:Rotary combination lock
969:Components and hardware
625:. Chubb. Archived from
309:. In the short story "
176:In 1817, a burglary in
1495:Lock Museum of America
1011:Bored cylindrical lock
285:, the inventor of the
241:
216:
137:
1523:Category:Locksmithing
1434:Ultrasonic transducer
662:Jock Dempsey (2002).
239:
210:
135:
69:"Chubb detector lock"
1404:Photoelectric sensor
1358:Glass break detector
1257:Real-estate lock box
1156:Electromagnetic lock
1028:Single-point locking
981:Interchangeable core
904:Fundamental concepts
529:A Scandal in Bohemia
311:A Scandal in Bohemia
283:Alfred Charles Hobbs
166:the Great Exhibition
54:improve this article
1500:Musée de la Serrure
1353:Fingerprint scanner
1262:Steering-wheel lock
1197:Chubb detector lock
1105:Magnetic keyed lock
1033:Three-point locking
843:United Technologies
827:Chubb detector lock
775:Rampart Engineering
649:. Chubb Locks. 1958
367:"Crime out of hand"
338:by William Gibson.
323:The Penrose Mystery
178:Portsmouth Dockyard
142:Chubb detector lock
1140:Wafer tumbler lock
1100:Lever tumbler lock
670:on 3 November 2022
643:"History of Locks"
609:on 10 January 2016
562:Arthur Conan Doyle
539:Arthur Conan Doyle
514:2013-09-05 at the
509:"History of Chubb"
307:Arthur Conan Doyle
297:In popular culture
242:
217:
146:lever tumbler lock
138:
1567:
1566:
1475:Exit control lock
1202:Child safety lock
1095:Disc tumbler lock
946:Physical security
851:
850:
518:, August 17, 2007
492:978-0-688-04080-2
319:R. Austin Freeman
150:re-locking device
130:
129:
122:
104:
16:(Redirected from
1587:
1556:
1544:
1543:
1532:
1531:
1521:
1520:
1388:Occupancy sensor
1247:Power door locks
1180:Other lock types
1149:Electronic locks
1115:Combination lock
1090:Pin tumbler lock
1078:Mechanical locks
963:
878:
871:
864:
855:
708:
701:
694:
685:
679:
677:
675:
658:
656:
654:
638:
636:
634:
629:on 25 April 2009
618:
616:
614:
598:
574:
571:
565:
548:
542:
525:
519:
506:
500:
499:
484:
474:
468:
467:
447:
441:
440:
432:
426:
425:
405:
399:
398:
391:
385:
384:
377:
371:
370:
362:
291:Great Exhibition
125:
118:
114:
111:
105:
103:
62:
38:
30:
21:
1595:
1594:
1590:
1589:
1588:
1586:
1585:
1584:
1570:
1569:
1568:
1563:
1509:
1485:Key to the City
1453:
1449:Window security
1414:Pressure switch
1383:Motion detector
1310:Security alarms
1304:
1271:
1175:
1166:Electric strike
1161:Electronic lock
1144:
1073:
1037:
964:
955:
926:Key duplication
899:
897:security alarms
882:
852:
847:
831:
815:
784:
765:Minimax Limited
748:
717:
712:
682:
673:
671:
661:
652:
650:
641:
632:
630:
623:"Chubb History"
621:
612:
610:
601:
595:
582:
578:
577:
572:
568:
549:
545:
526:
522:
516:Wayback Machine
507:
503:
493:
476:
475:
471:
464:
449:
448:
444:
434:
433:
429:
422:
407:
406:
402:
395:"Keeping Track"
393:
392:
388:
379:
378:
374:
364:
363:
359:
354:
303:Sherlock Holmes
299:
274:
234:
174:
126:
115:
109:
106:
63:
61:
51:
39:
28:
23:
22:
15:
12:
11:
5:
1593:
1591:
1583:
1582:
1572:
1571:
1565:
1564:
1562:
1561:
1549:
1537:
1525:
1514:
1511:
1510:
1508:
1507:
1502:
1497:
1492:
1487:
1482:
1477:
1472:
1467:
1461:
1459:
1455:
1454:
1452:
1451:
1446:
1444:Water detector
1441:
1436:
1431:
1426:
1421:
1419:Proximity card
1416:
1411:
1406:
1401:
1396:
1390:
1385:
1380:
1375:
1370:
1365:
1360:
1355:
1350:
1345:
1340:
1335:
1330:
1325:
1320:
1314:
1312:
1306:
1305:
1303:
1302:
1297:
1292:
1287:
1281:
1279:
1273:
1272:
1270:
1269:
1264:
1259:
1254:
1252:Protector lock
1249:
1244:
1239:
1234:
1229:
1224:
1219:
1214:
1209:
1204:
1199:
1194:
1189:
1183:
1181:
1177:
1176:
1174:
1173:
1168:
1163:
1158:
1152:
1150:
1146:
1145:
1143:
1142:
1137:
1132:
1127:
1122:
1117:
1112:
1107:
1102:
1097:
1092:
1087:
1081:
1079:
1075:
1074:
1072:
1071:
1066:
1061:
1056:
1051:
1045:
1043:
1039:
1038:
1036:
1035:
1030:
1025:
1024:
1023:
1018:
1013:
1003:
998:
993:
988:
983:
978:
972:
970:
966:
965:
958:
956:
954:
953:
948:
943:
938:
933:
928:
923:
918:
916:Authentication
913:
911:Access control
907:
905:
901:
900:
883:
881:
880:
873:
866:
858:
849:
848:
846:
845:
839:
837:
833:
832:
830:
829:
823:
821:
817:
816:
814:
813:
808:
803:
798:
796:Willis Carrier
792:
790:
786:
785:
783:
782:
777:
772:
767:
762:
756:
754:
750:
749:
747:
746:
741:
736:
731:
725:
723:
719:
718:
713:
711:
710:
703:
696:
688:
681:
680:
659:
639:
619:
599:
593:
579:
576:
575:
566:
543:
520:
501:
491:
469:
462:
442:
427:
420:
400:
386:
372:
356:
355:
353:
350:
298:
295:
287:protector lock
273:
270:
262:King George IV
233:
230:
173:
170:
128:
127:
42:
40:
33:
26:
24:
18:Jeremiah Chubb
14:
13:
10:
9:
6:
4:
3:
2:
1592:
1581:
1578:
1577:
1575:
1560:
1559:
1555:
1550:
1548:
1547:
1538:
1536:
1535:
1526:
1524:
1516:
1515:
1512:
1506:
1503:
1501:
1498:
1496:
1493:
1491:
1488:
1486:
1483:
1481:
1478:
1476:
1473:
1471:
1468:
1466:
1463:
1462:
1460:
1458:Miscellaneous
1456:
1450:
1447:
1445:
1442:
1440:
1437:
1435:
1432:
1430:
1427:
1425:
1422:
1420:
1417:
1415:
1412:
1410:
1407:
1405:
1402:
1400:
1397:
1394:
1391:
1389:
1386:
1384:
1381:
1379:
1376:
1374:
1371:
1369:
1366:
1364:
1363:Heat detector
1361:
1359:
1356:
1354:
1351:
1349:
1346:
1344:
1343:Door security
1341:
1339:
1336:
1334:
1331:
1329:
1326:
1324:
1321:
1319:
1316:
1315:
1313:
1311:
1307:
1301:
1298:
1296:
1293:
1291:
1288:
1286:
1283:
1282:
1280:
1278:
1274:
1268:
1265:
1263:
1260:
1258:
1255:
1253:
1250:
1248:
1245:
1243:
1240:
1238:
1235:
1233:
1230:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1184:
1182:
1178:
1172:
1169:
1167:
1164:
1162:
1159:
1157:
1154:
1153:
1151:
1147:
1141:
1138:
1136:
1133:
1131:
1128:
1126:
1123:
1121:
1118:
1116:
1113:
1111:
1108:
1106:
1103:
1101:
1098:
1096:
1093:
1091:
1088:
1086:
1083:
1082:
1080:
1076:
1070:
1067:
1065:
1062:
1060:
1057:
1055:
1052:
1050:
1047:
1046:
1044:
1040:
1034:
1031:
1029:
1026:
1022:
1019:
1017:
1014:
1012:
1009:
1008:
1007:
1004:
1002:
999:
997:
994:
992:
989:
987:
984:
982:
979:
977:
974:
973:
971:
967:
962:
952:
949:
947:
944:
942:
939:
937:
936:Master keying
934:
932:
931:Key relevance
929:
927:
924:
922:
919:
917:
914:
912:
909:
908:
906:
902:
898:
894:
890:
886:
879:
874:
872:
867:
865:
860:
859:
856:
844:
841:
840:
838:
834:
828:
825:
824:
822:
818:
812:
809:
807:
804:
802:
801:Charles Chubb
799:
797:
794:
793:
791:
787:
781:
778:
776:
773:
771:
768:
766:
763:
761:
758:
757:
755:
751:
745:
742:
740:
737:
735:
732:
730:
727:
726:
724:
720:
716:
709:
704:
702:
697:
695:
690:
689:
686:
669:
665:
660:
648:
644:
640:
628:
624:
620:
608:
604:
600:
596:
594:0-07-137494-9
590:
586:
581:
580:
570:
567:
563:
559:
558:
553:
547:
544:
540:
536:
535:
530:
524:
521:
517:
513:
510:
505:
502:
498:
494:
488:
485:. W. Morrow.
483:
482:
473:
470:
465:
463:9780071549820
459:
455:
454:
446:
443:
438:
431:
428:
423:
421:9780398083304
417:
413:
412:
404:
401:
396:
390:
387:
382:
376:
373:
368:
361:
358:
351:
349:
347:
343:
342:Sarah MacLean
339:
337:
336:
330:
328:
327:Dr. Thorndyke
324:
320:
316:
312:
308:
304:
296:
294:
292:
289:, during the
288:
284:
280:
271:
269:
265:
263:
259:
255:
254:Staffordshire
251:
247:
238:
231:
229:
226:
222:
214:
213:Wolverhampton
209:
205:
203:
199:
198:Joseph Bramah
195:
194:Robert Barron
191:
187:
183:
179:
171:
169:
167:
163:
159:
153:
151:
147:
143:
134:
124:
121:
113:
102:
99:
95:
92:
88:
85:
81:
78:
74:
71: –
70:
66:
65:Find sources:
59:
55:
49:
48:
43:This article
41:
37:
32:
31:
19:
1551:
1539:
1527:
1409:Piezo switch
1318:Alarm device
1285:Lock bumping
1277:Lock picking
1237:Luggage lock
1196:
1187:Bicycle lock
1171:Keycard lock
1064:Skeleton key
1016:Mortise lock
996:Key retainer
893:lock picking
889:locksmithing
826:
806:Walter Kidde
753:Acquisitions
722:Subsidiaries
672:. Retrieved
668:the original
651:. Retrieved
646:
631:. Retrieved
627:the original
611:. Retrieved
607:the original
584:
569:
555:
546:
532:
523:
504:
496:
480:
472:
452:
445:
430:
410:
403:
389:
375:
360:
345:
340:
333:
331:
322:
300:
275:
266:
243:
221:prison hulks
218:
201:
175:
154:
141:
139:
116:
107:
97:
90:
83:
76:
64:
52:Please help
47:verification
44:
1505:Puzzle lock
1490:Lock Museum
1424:Reed switch
1333:Card reader
1242:Night latch
1192:Bramah lock
1085:Warded lock
921:Key control
811:Elisha Otis
760:GE Security
674:16 November
653:16 November
613:16 November
335:Neuromancer
305:stories by
246:Chubb Locks
172:Development
1368:Key switch
1217:Door chain
1049:Berlin key
352:References
250:Willenhall
190:Portsmouth
158:Portsmouth
80:newspapers
1348:Dual loop
1328:Car alarm
1290:Locksport
1212:Dead bolt
1207:Crash bar
1130:Time lock
1069:Smart key
986:Key blank
344:'s novel
293:in 1851.
258:workhouse
202:regulator
168:of 1851.
110:July 2019
1574:Category
1429:Tripwire
1300:Snap gun
1295:Slim Jim
1267:The Club
1227:Knox Box
1059:Keychain
1021:Rim lock
991:Key code
951:Rekeying
941:Password
820:Products
512:Archived
1110:Padlock
1054:Car key
1006:Lockset
1001:Lockrod
976:Bitting
836:Related
633:28 July
279:guineas
272:Picking
186:Charles
162:England
94:scholar
1373:Keypad
895:, and
789:People
591:
564:, 1905
541:, 1892
489:
460:
418:
215:(1870)
96:
89:
82:
75:
67:
1546:Locks
1395:(PIR)
1232:Latch
885:Locks
734:Kidde
144:is a
101:JSTOR
87:books
1558:Book
1534:Keys
1042:Keys
676:2006
655:2006
635:2009
615:2006
589:ISBN
487:ISBN
458:ISBN
416:ISBN
225:pick
196:and
73:news
554:",
531:",
321:'s
252:in
56:by
1576::
891:,
887:,
645:.
560:,
537:,
325:,
160:,
140:A
877:e
870:t
863:v
707:e
700:t
693:v
678:.
657:.
637:.
617:.
597:.
550:"
527:"
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
