IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Àárín
2 hours
Ìlànà
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òwú rọ́bà1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìdìrun2
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òwú Ìrán1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìdìrun3
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.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìdìrun
Ìdíwọ̀n4
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òwú síliki1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìdìrun5
5
Reel it
Reel it
Wind the cord on a reel as it leaves the braider.
Àwọn irinṣẹ́ tí a nílò:
Ìṣètò kùmọ̀ òwúÌtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.