Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
English
Youblob · CC0
Elastic Cord: Cotton Braided over a Stretched Rubber Strand (Blakesley 1889)
Braid cotton round a rubber strand while the rubber is stretched, and the cord springs back when it is let go. Gilbert Blakesley of Bristol, Connecticut set the stretch so that the braid stops the cord before the rubber is pulled past the point it fully recovers from, and so that at rest the rubber carries no tension at all. The braid protects the rubber and it lasts.
Source: G. H. Blakesley, US 411,416 (1889). The rubber strand is our rubber thread blueprint; the tools are ours. Picture drawn by Youblob.
Hagati
2 hours
Amabwiriza
1
1
Feed the rubber under tension
Feed the rubber under tension
Pass a long rubber strand, or several, under tension through a braiding machine. Round or flat, one strand or more: Blakesley says it does not matter.
Ibikoresho by'iyi ntambwe:
Urudodo rwa kawutshu1 as requiredIbikoresho bikenewe:
Imashini iboha imigozi2
2
Braid on a cotton cover
Braid on a cotton cover
Let the machine braid a covering of cotton thread over the stretched rubber with a rapid feed.
Ibikoresho by'iyi ntambwe:
Ubudodo bw'Ipamba1 as requiredIbikoresho bikenewe:
Imashini iboha imigozi3
3
Set tension against feed
Set tension against feed
Adjust the rubber tension and the braider feed so that, when the cord is pulled, the braid reaches its full length before the rubber reaches its safe stretch, the stretch it fully recovers from without risk of breaking. At rest, the rubber should be under no tension at all.
Ibikoresho bikenewe:
Imashini iboha imigozi
Umurongo w'ipima4
4
Optional soft second cover
Optional soft second cover
For a softer cord, pass it again, under tension, through a braider that lays a loose second covering of soft thread such as silk or wool.
Ibikoresho by'iyi ntambwe:
Ubudodo bwa hariri1 as requiredIbikoresho bikenewe:
Imashini iboha imigozi5
5
Reel it
Reel it
Wind the cord on a reel as it leaves the braider.
Ibikoresho bikenewe:
Ibikoresho by'ibisunikwa by'urudodoIbikoresho
3- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
3- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.