Thaum twg cov xaum siv tshuab tau tsim?

Cov txheej txheem:

Thaum twg cov xaum siv tshuab tau tsim?
Thaum twg cov xaum siv tshuab tau tsim?
Anonim

John Hawkins thiab Sampson Mordan Thawj Patent Tus Mechanical Pencil. Silver S. Mordan & Co txhua yam cwj mem nrog cov cim rau 1825.

Thaum twg yog tus cwj mem tshuab tsim tawm?

Silver S. Mordan & Co txhua yam cwj mem nrog cov cim rau 1825.

Thaum twg cov xaum siv tshuab tau tsim tawm?

xaum nyob rau hauv 17th Century Xyoo 1662, thawj cov xaum tsim tawm tau tsim nyob rau hauv Nuremberg, lub teb chaws Yelemees.

Vim li cas cov xaum ntoo zoo dua li tshuab?

xaum ntoo yuav tsum tau siv zog ntau dua rau kev ua haujlwm ntev dua thiab khoom plig. Raws li cov xaum tshuab siv tau ntev dua, nws tsis yog ib txwm muaj. Thaum cov hlau lead tsis yooj yim ntawm cov xaum siv tshuab tas li tawg thiab snaps, ces lawv yeej tsis kav ntev li ntev.

tus cwj mem tshuab siv hu ua dab tsi?

Thaum hu ua "mechanical mem hluav" hauv Tebchaws Meskas nws hu ua " xaum xaum" hauv UK thiab " cwj mem" hauv Is Nrias teb. Tus cwj mem no tsuas yog siv rau kev kos duab thiab kev sau ntawv, tab sis nws kuj tuaj yeem siv rau hauv kev kos duab zoo.

Pom zoo:

Thaum twg lub tshuab xaws lockstitch tau tsim?

Thaum twg lub tshuab xaws lockstitch tau tsim?

Elias Howe patented thawj zaug lockstitch tshuab xaws hauv ntiaj teb hauv 1846. Nws qhov kev tsim kho tau pab kev tsim cov tshuab xaws thiab khaub ncaws ntau. Leej twg invented lock stitch? Elias Howe Jr. (1819–1867) yog ib tus neeg tsim khoom ntawm thawj lub tshuab xaws ua haujlwm.

Thaum twg yog cov tshuab ua pa tau tsim?

Thaum twg yog cov tshuab ua pa tau tsim?

thawj cov phom loj uas tau txheeb pom tias yog cov neeg tua hluav taws tau tsim nyob rau hauv lub xyoo pua 16thua riam phom nruab nrab ntawm qhov chaw tiaj tus (qhov hluav taws kub ncaj qha) ntawm rab phom loj thiab lub siab trajectory (indirect hluav taws) ntawm mortars.

Thaum twg cov khoom siv hluav taws xob tau tsim?

Thaum twg cov khoom siv hluav taws xob tau tsim?

Invented by the greeks in (c. 1200 BC), cov thev naus laus zis no tau siv ntau hauv kev ua tub rog, feem ntau tsis ntev los no hauv Asmeskas Kev Tsov Rog Thoob Ntiaj Teb. Cov hluav taws Greek tau siv los ntawm cov tub rog los tiv thaiv cov phab ntsa ntawm cov nroog uas muaj zog.

Thaum twg cov tshuab ziab plaub hau tau tsim?

Thaum twg cov tshuab ziab plaub hau tau tsim?

In 1888, Alexandre-Ferdinand Godefroy, tus kws tshaj lij Fab Kis Fab Kis - tus kws tsim plaub hau plaub hau - patented lub tshuab ziab khaub ncaws thawj poj koob yawm txwv. Lub contraption yuav tsum tau txuas mus rau "rau txhua yam tsim nyog lub rhaub,"

Thaum twg cov khoom siv tiv thaiv zoo li qub tau tsim?

Thaum twg cov khoom siv tiv thaiv zoo li qub tau tsim?

Los ntawm thaum ntxov 1900s, nws tau pom tseeb tias tib neeg xav tau txoj hauv kev los thaiv cov hluav taws xob zoo li qub kom lawv cov cuab yeej ua haujlwm tau raug thiab lawv yuav tsis raug mob lossis cuam tshuam. Hauv 1918, Canadian-American engineer Roy A.