Wrenches thawj zaug tshwm sim nyob rau hauv lub xyoo pua 15th nyob rau hauv daim ntawv ntawm ib lub thawv wrench (saib daim duab. Dab tsi yog spanner key?). Tsis muaj qhov loj me me, thiab txhua lub clasp thiab cov ciaj ntswj tau ua tus kheej los ntawm ib tus kws ntaus hlau.
Nws ntseeg hais tias thawj wrenches tau siv los ua cua ntawm lub hneev ntawm tus ntoo khaub lig, nruj kom lawv nruj dua li tib neeg txhais tes ua tau.
Nyob rau hauv lub xyoo pua 16th, lub log-lock phom tau tsim uas yuav tsum tau ib lub thawv wrench los tua. Lub wrench loaded phom los ntawm springing lub log. Thaum lub trigger raug rub, lub caij nplooj ntoos hlav tau tso tawm thiab lub log tig, ua rau muaj cov nplaim taws uas raug rho tawm ntawm rab yaj phom.
Nws tsis yog txog rau thaum xyoo pua 18th uas wrenches tau muaj ntau hom thiab siv los suav nrog txhua hom uas peb muaj niaj hnub no. Nrog rau qhov pib ntawm Industrial Revolution, wrought hlau wrenches ua los ntawm blacksmiths tau hloov nrog cam khwb cia hlau versions ua rau ib tug loj scale.
Los ntawm 1825 tus qauv qhov ntau thiab tsawg ntawm fasteners thiab wrenches tau tsim kom ceev, bolts thiab wrenches tuaj yeem hloov pauv thiab tsis tas yuav tsum tau ua raws li kev teeb tsa.
Qhov no txhais tau hais tias cov khoom siv tuaj yeem hloov pauv, cov wrenches tuaj yeem siv rau ntawm ntau lub fasteners, thiab cov txiv ntseej tuaj yeem siv rau ntau tshaj ib lub bolts. Nws kuj txhais tau hais tias txhua tus kws kho tsheb tuaj yeem khiav lub tsheb nrog lawv tus kheej cov txheej txheem wrenches es tsis txhob lub tsheb ib txwm txav nrog ib qho tshwj xeeb.
Qhov tseeb ntawm kev tsim cov khoom siv no yog qhov tsawg, qhov zoo tshaj plaws yog 1/1,000 ". Los ntawm 1841, ib tug engineer hu ua Sir Joseph Whitworth tau tsim ib txoj hauv kev los ua kom qhov tseeb mus rau 1/10,000 1 "thiab tom qab ntawd, nrog kev tsim lub rooj ntev zaum micrometer, mus txog 1,000,000/XNUMX".
Nrog rau cov thev naus laus zis tshiab no, tus qauv Whitworth tau tsim, uas tuaj yeem hloov pauv hauv txhua lub Hoobkas thoob plaws tebchaws.
Thaum Ntiaj Teb Tsov Rog II, txhawm rau txuag cov ntaub ntawv, tus qauv Whitworth tau hloov kho kom lub taub hau me me. Cov qauv no tau dhau los ua lub npe hu ua British Standard (BS). Whitworth wrenches tseem tuaj yeem siv rau hauv tus qauv tshiab, tab sis me me wrenches yuav tsum tau siv hloov. Piv txwv li, ¼W wrench tuaj yeem siv rau 5/16BS fasteners (saib duab). Qhov luaj li cas wrench muaj? yog xav paub ntxiv).
Nyob rau xyoo 1970, UK tau txiav txim siab ua raws li cov thawj coj ntawm cov teb chaws Europe thiab pib siv cov metric system. Wrenches thiab fasteners pib tsim nyob rau hauv qhov ntau thiab tsawg, tab sis txij li thaum cov khoom ua ntej 70s tseem siv tau, nti wrenches qee zaum tseem xav tau.
