Kwathatha izinkulungwane zeminyaka ukuthi izikulufu ezincane ziqanjwe zize ziqiniswe ngokwewashi futhi zixegiswe ngokuphambene newashi. Ingabe impushana yegolide ike yacabanga ngenkinga, kungani kufanele iqiniswe ngokwewashi?
Amathuluzi emishini ayisithupha alula yilawa:Izikulufu, izindawo ezithambekile, ama-Levers, ama-Pulleys, ama-Wedge, amasondo, ama-ekseli.
Isikulufu siphakathi kwemishini eyisithupha elula, kodwa uma singakusho, siyi-eksisi kanye nendiza ethambekele ezungeza kuso. Namuhla, izikulufu zithuthukise osayizi abajwayelekile. Indlela ejwayelekile yokusebenzisa isikulufu ukusiqinisa ngokwewashi (ngokungafani newashi ukuze usikhulule).
Kodwa-ke, njengoba izikrini ekuqaleni kokusungulwa zonke zenziwe ngesandla, ubuhle bezikulufu babungahambisani, okwakuvame ukunqunywa ngokuthanda komuntu ingcweti.
Maphakathi nekhulu le-16, unjiniyela wasenkantolo ongumFulentshi u-Jaques Besson wasungula i-lathe eyayingase isikwe ibe ngezikulufo, futhi lobu buchwepheshe kamuva bathandwa ngemva kweminyaka eyikhulu. INgisi uHenry Maudsley wasungula i-lathe yesimanje ngo-1797, futhi ngayo, ukucoleka kwemicu kwaba ngcono kakhulu. Noma kunjalo, alikho izinga elifanayo losayizi nokucoleka kwezikulufu.
Lesi simo sashintsha ngo-1841. UJoseph Whitworth, owayefundela umsebenzi e-Maudsley, wathumela i-athikili eSikhungweni Sonjiniyela Bakamasipala efuna kuhlanganiswe amamodeli ngezikulufu. Wanikeza iziphakamiso ezimbili:
1. Ukuthambekela kwentambo yesikulufa kufanele kube ngu-55 °.
2. Kungakhathaliseki ububanzi besikulufu, izinga elithile kufanele lamukelwe ngenani lezintambo ngonyawo ngalunye.
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Isikhathi sokuthumela: Apr-16-2020