107:, are thin-gauge, barrel-shaped, knotless coils individually encased in fabric pockets—normally a fabric from man-made, non-woven fiber. Some manufacturers pre-compress these coils, which makes the mattress firmer and allows for motion separation between the sides of the bed. As the springs are not wired together, they work more or less independently: the weight on one spring does not affect its neighbors. This allows them to react to pressure independently instead of all together, which minimizes movement and allows for a more buoyant feel.
65:
844:
20:
854:
130:
was patented by Louis Andrew Vargha. Some modern feedback on coils within mattresses cast aspersions on some of its attributes such as abrasion on coils eventually culminating into prodding, and the audibility of the coils, as it may decrease privacy for intimate moments such as sexual activity.
93:
are an hourglass type coil on which portions of the top and bottom convolutions have been flattened. In assembling the innerspring unit, these flat segments of wire are hinged together with helical wires. The hinging effect of the unit is designed to conform to body shape. LFK (Left Facing Knot)
86:
springs of the 19th century, they are still prevalent in mid-priced mattresses. Bonnell springs are a knotted, round-top, hourglass-shaped steel wire coil. When laced together with cross wire helicals, these coils form the simplest innerspring unit, also referred to as a
Bonnell
60:
There are four types of mattress coils. A key desideratum is "response range", meaning the change in firmness as the spring is compressed – initially soft, to conform to the body, then hard, to provide support. In increasing order of response range and cost, the types are:
76:(the Leggett & Platt brand name is "Mira-coil") is an innerspring configuration in which the rows of coils are formed from a single piece of wire. They work in a hinging effect similar to that of offset coils.
284:
Jacobson, Bert H., et al. "Effect of prescribed sleep surfaces on back pain and sleep quality in patients diagnosed with low back and shoulder pain." Applied ergonomics 42.1 (2010): 91-97.
293:
Rizzo, Terrie
Heinrich. "Sleep matters: learn smart strategies to make sure your body gets the zzzzzs it needs." IDEA Fitness Journal 4.5 (2007): 102-104.
116:
While coil springs were invented in the 15th century, they were not used in mattresses until the mid-late 19th century, following the use of
52:
Mattress coils were introduced in the mid-late 19th century, and remain popular in the 21st century, particularly in the United States.
49:(comfort layer) of mattresses, primarily with a coil core ("coil-on-coil" construction), but sometimes with other core types.
890:
321:
213:
921:
1118:
676:
1065:
966:
123:
Microcoils were introduced in the early 21st century, and as of 2014 are a small part of the market.
1011:
883:
857:
1031:
999:
188:
160:
127:
117:
547:
314:
1026:
261:
42:
45:, which is their original use. In recent years, small "micro-coils" are being used in the
8:
1113:
1075:
876:
600:
1058:
1048:
956:
761:
590:
236:
144:
140:
424:
1070:
1053:
783:
1004:
926:
911:
847:
728:
671:
651:
307:
1021:
994:
961:
723:
686:
395:
83:
793:
713:
708:
415:
168:
64:
1107:
691:
575:
570:
156:
98:
1087:
1080:
1043:
916:
829:
798:
788:
718:
628:
585:
565:
496:
410:
139:
The mattress coil market is quite concentrated – the leading suppliers are
1016:
981:
941:
931:
868:
751:
746:
666:
633:
595:
580:
506:
474:
34:
1036:
989:
824:
814:
778:
772:
623:
501:
464:
459:
442:
385:
193:
46:
936:
951:
656:
542:
532:
527:
522:
148:
1092:
899:
615:
605:
557:
537:
491:
469:
454:
430:
380:
375:
370:
365:
344:
38:
971:
766:
756:
681:
643:
436:
405:
360:
330:
152:
19:
976:
738:
448:
390:
172:
94:
coils are an offset coil with a cylindrical or columnar shape.
819:
702:
696:
661:
400:
354:
176:
164:
946:
237:"Mattress Coils: Considerations When Purchasing a Mattress"
299:
41:. Coils are primarily used in the core (support layer) of
339:
82:are the oldest and most common. First adapted from
1105:
884:
315:
159:(formally Hickory Springs, founded 1944) of
898:
891:
877:
322:
308:
147:and AGRO International (founded 1948) of
103:also known as wrapped or encased coils or
63:
18:
214:"Mattress support cores - Innersprings"
1106:
171:and Subiñas (founded 1959) of Mungia,
872:
303:
853:
234:
13:
14:
1130:
922:Chittenden & Eastman Company
852:
843:
842:
134:
287:
278:
254:
228:
206:
1:
235:Auer, Joe (5 February 2017).
199:
120:in furniture and carriages.
7:
329:
182:
163:; Spinks (founded 1840) of
10:
1135:
1066:Tempur Sealy International
677:Hudson's Bay point blanket
216:. The Mattress Underground
111:
907:
838:
807:
737:
642:
614:
556:
515:
483:
337:
55:
262:"Pocket Coils – Purple"
189:Upholstery coil springs
161:Hickory, North Carolina
118:upholstery coil springs
16:Component of a mattress
69:
43:innerspring mattresses
23:
67:
22:
1119:Springs (mechanical)
1076:Stearns & Foster
1027:Sleep Country Canada
1054:Chattam & Wells
957:Leggett & Platt
601:Orthopedic mattress
141:Leggett & Platt
762:Contour leg pillow
747:Acupressure pillow
591:Mattress protector
145:Carthage, Missouri
143:(founded 1883) of
70:
24:
1101:
1100:
1005:Tuft & Needle
912:Boll & Branch
866:
865:
784:Orthopedic pillow
155:. Others include
1126:
893:
886:
879:
870:
869:
856:
855:
846:
845:
729:Weighted blanket
709:Security blanket
672:Electric blanket
324:
317:
310:
301:
300:
294:
291:
285:
282:
276:
275:
273:
272:
258:
252:
251:
249:
247:
241:Mattress Clarity
232:
226:
225:
223:
221:
210:
74:Continuous coils
31:mattress springs
29:, also known as
1134:
1133:
1129:
1128:
1127:
1125:
1124:
1123:
1104:
1103:
1102:
1097:
903:
897:
867:
862:
834:
803:
733:
724:Sleeved blanket
687:Patchwork quilt
638:
610:
552:
511:
485:
479:
425:Lit Ă la Turque
396:Four-poster bed
342:
333:
328:
298:
297:
292:
288:
283:
279:
270:
268:
260:
259:
255:
245:
243:
233:
229:
219:
217:
212:
211:
207:
202:
185:
137:
128:bed coil spring
114:
58:
17:
12:
11:
5:
1132:
1122:
1121:
1116:
1099:
1098:
1096:
1095:
1090:
1085:
1084:
1083:
1078:
1073:
1063:
1062:
1061:
1056:
1046:
1041:
1040:
1039:
1034:
1024:
1019:
1014:
1009:
1008:
1007:
1002:
997:
992:
986:Serta Simmons
984:
979:
974:
969:
964:
959:
954:
949:
944:
939:
934:
929:
924:
919:
914:
908:
905:
904:
896:
895:
888:
881:
873:
864:
863:
861:
860:
850:
839:
836:
835:
833:
832:
827:
822:
817:
811:
809:
805:
804:
802:
801:
796:
794:Speaker pillow
791:
786:
781:
776:
769:
764:
759:
754:
749:
743:
741:
735:
734:
732:
731:
726:
721:
716:
714:Silk comforter
711:
706:
699:
694:
689:
684:
679:
674:
669:
664:
659:
654:
648:
646:
640:
639:
637:
636:
631:
626:
620:
618:
612:
611:
609:
608:
603:
598:
593:
588:
583:
578:
573:
568:
562:
560:
554:
553:
551:
550:
545:
540:
535:
530:
525:
519:
517:
516:Bed components
513:
512:
510:
509:
504:
499:
494:
488:
486:
481:
480:
478:
477:
472:
467:
462:
457:
452:
445:
440:
433:
428:
421:
413:
408:
403:
398:
393:
388:
383:
378:
373:
368:
363:
358:
350:
348:
335:
334:
327:
326:
319:
312:
304:
296:
295:
286:
277:
253:
227:
204:
203:
201:
198:
197:
196:
191:
184:
181:
169:United Kingdom
136:
133:
113:
110:
109:
108:
105:pocket springs
99:Marshall coils
95:
88:
77:
68:Pocket springs
57:
54:
27:Mattress coils
15:
9:
6:
4:
3:
2:
1131:
1120:
1117:
1115:
1112:
1111:
1109:
1094:
1091:
1089:
1086:
1082:
1079:
1077:
1074:
1072:
1069:
1068:
1067:
1064:
1060:
1057:
1055:
1052:
1051:
1050:
1047:
1045:
1042:
1038:
1035:
1033:
1030:
1029:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1006:
1003:
1001:
998:
996:
993:
991:
988:
987:
985:
983:
980:
978:
975:
973:
970:
968:
965:
963:
960:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
933:
930:
928:
925:
923:
920:
918:
915:
913:
910:
909:
906:
902:manufacturers
901:
894:
889:
887:
882:
880:
875:
874:
871:
859:
851:
849:
841:
840:
837:
831:
828:
826:
823:
821:
818:
816:
813:
812:
810:
808:Related items
806:
800:
797:
795:
792:
790:
787:
785:
782:
780:
777:
775:
774:
770:
768:
765:
763:
760:
758:
755:
753:
750:
748:
745:
744:
742:
740:
736:
730:
727:
725:
722:
720:
717:
715:
712:
710:
707:
705:
704:
700:
698:
695:
693:
692:Photo blanket
690:
688:
685:
683:
680:
678:
675:
673:
670:
668:
665:
663:
660:
658:
655:
653:
650:
649:
647:
645:
641:
635:
632:
630:
627:
625:
622:
621:
619:
617:
613:
607:
604:
602:
599:
597:
594:
592:
589:
587:
584:
582:
579:
577:
576:Tick mattress
574:
572:
571:Cambodian mat
569:
567:
564:
563:
561:
559:
555:
549:
546:
544:
541:
539:
536:
534:
531:
529:
526:
524:
521:
520:
518:
514:
508:
505:
503:
500:
498:
495:
493:
490:
489:
487:
482:
476:
473:
471:
468:
466:
463:
461:
458:
456:
453:
451:
450:
446:
444:
441:
439:
438:
434:
432:
429:
427:
426:
422:
420:
418:
414:
412:
409:
407:
404:
402:
399:
397:
394:
392:
389:
387:
384:
382:
379:
377:
374:
372:
369:
367:
364:
362:
359:
357:
356:
352:
351:
349:
346:
341:
336:
332:
325:
320:
318:
313:
311:
306:
305:
302:
290:
281:
267:
263:
257:
242:
238:
231:
215:
209:
205:
195:
192:
190:
187:
186:
180:
178:
174:
170:
166:
162:
158:
157:HSM (company)
154:
150:
146:
142:
135:Manufacturers
132:
129:
124:
121:
119:
106:
102:
100:
96:
92:
89:
85:
81:
80:Bonnell coils
78:
75:
72:
71:
66:
62:
53:
50:
48:
44:
40:
36:
32:
28:
21:
1088:Therm-a-Rest
1081:Tempur-Pedic
1044:Sleep Number
1022:Sit 'n Sleep
917:Casper Sleep
830:Blanket fort
799:Throw pillow
771:
719:Sleeping bag
701:
629:Bunkie board
586:Mattress pad
566:Air mattress
497:Cradle (bed)
455:Platform bed
447:
435:
423:
416:
411:Hospital bed
353:
289:
280:
269:. Retrieved
265:
256:
244:. Retrieved
240:
230:
218:. Retrieved
208:
138:
125:
122:
115:
104:
97:
91:Offset coils
90:
79:
73:
59:
51:
35:coil springs
30:
26:
25:
1017:Simba Sleep
982:Savoir Beds
942:Helix Sleep
932:Eight Sleep
752:Bamboo wife
667:Duvet cover
634:Storage bed
596:Memory foam
581:Mahjong mat
507:Toddler bed
484:Infant beds
475:Trundle bed
1114:Mattresses
1108:Categories
1059:Spring Air
1049:Spring Air
1037:Endy Sleep
990:Beautyrest
825:Nightstand
815:Bed warmer
789:Sex pillow
779:Eye pillow
773:Dakimakura
624:Box-spring
558:Mattresses
502:Infant bed
465:Sleigh bed
460:Polish bed
443:Murphy bed
386:Canopy bed
271:2019-02-13
266:purple.com
200:References
194:Box-spring
175:province,
84:buggy seat
47:upholstery
37:used in a
962:Lo Monaco
952:King Koil
657:Comforter
616:Bed bases
548:Headboard
543:Footboard
533:Bed skirt
528:Bed sheet
523:Bed frame
419:bed-stove
345:bed sizes
149:Bad Essen
1093:Vispring
967:McRoskey
900:Mattress
848:Category
644:Blankets
606:Waterbed
538:Cot side
492:Bassinet
470:Sofa bed
431:Loft bed
381:Camp bed
376:Rope bed
371:Cage bed
366:Bunk bed
183:See also
39:mattress
1012:Shifman
1000:Simmons
972:Pikolin
937:Hästens
858:Commons
767:Cushion
757:Bolster
739:Pillows
682:Lizhnyk
437:Charpai
406:Hammock
361:Box-bed
331:Bedding
246:20 July
220:21 July
153:Germany
112:History
977:Saatva
652:Afghan
449:Petate
391:Daybed
338:Adult
173:Biscay
33:, are
1071:Sealy
1032:Bloom
995:Serta
927:Dorel
820:Couch
703:Razai
697:Quilt
662:Duvet
401:Futon
355:Banig
177:Spain
165:Leeds
87:unit.
56:Types
947:IKEA
417:Kang
340:beds
248:2017
222:2017
126:The
1110::
264:.
239:.
179:.
167:,
151:,
892:e
885:t
878:v
347:)
343:(
323:e
316:t
309:v
274:.
250:.
224:.
101:,
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
