Marshall coil
Marshall coils, nke a makwaara dị ka encased coils ma ọ bụ encased Mmiri(nke a maara nke ọma na North America dị ka Springs akpa), bụ akụkụ ndị mmadụ n'ihe ndị mere nke matarasị nke a na-ekpuchi coil ọ bụla n'ụzọ dị iche na ihe akwa.
Akụkọ ihe mere eme[dezie | dezie ebe o si]
Ọ bụ James Marshall, onye Canada a mụrụ, mepụtara coils Marshall na 1899, onye na-arụ ọrụ na injinia a mụrụ na nso Haldimand, Ontario, Canada. Ọ natara ikike ikike nke Canada na 1900, na ikike ikike nke United States na United Kingdom na 1902.[1][2][3][4] Marshall guzobere ụlọ ọrụ Marshall Mattress mbụ na Toronto, Canada, nke gara n'ihu na-arụ ọrụ ihe karịrị afọ 119.[5] O nyekwara ikike ikike maka United Kingdom nye ndị ọrụ mbụ ya; ụlọ ọrụ ahụ na-arụ ọrụ n'okpuru aha Ụlọ ọrụ Marshall Sanitary Mattress ruo na mbido afọ 1930, mgbe ha gbanwere aha ha ka ọ bụrụ VI-Mmiri. Na Jenụwarị 2019, Flex Group nwetara (Canada) Marshall Mattress ụlọ ọrụ site n'aka Onye Okike Anyị nyere Anyị aka n'ime ụmụ ndị ikom abụọ ahụ n'ebe nile site n'ime ụmụ ndị ogbi ozi ọma ahụ n'ebe nile ndị nwe ya n'oge ahụ, ezinụlọ Warner, iji gaa n'ihu na-emepụta dị n'ala matarasị aka.[6][7]
Echiche[dezie | dezie ebe o si]
Marshall tụụrụ ime matarasị ebe isi iyi ndị kwụụrụ onwe ha n'ime ga-enye nkwado na nkasi obi n'ime matarasị ahụ n'onwe ya. Marshall mepụtara isi iyi cylindrical coil, nke ọ bụla a dụkọtara n'ime akpa ákwà ogho, nke nyere nkwado na-ebuli elu n'onwe ya. Mgbe a na-etinye ya ọnụ, coils ahụ ghọrọ usoro nkwụsị nke onwe ya nke na-agbanye n'ụdị na ịdị arọ nke onye ọ bụla, na-enye nkwado na nkasi obi na-enweghị atụ. Mgbe a na-etinye ya, matarasị Marshall a rụchara arụcha na-achọ ibelata nrụgide anụ ahụ n'okpuru onye na-ehi ụra, ma na-azọrọ na ọ ga-ebelata ya. Usoro matarasị jupụtara n'akpa uwe nke Marshall ghọrọ ụkpụrụ mbụ zuru ụwa ọnụ maka iwu matarasị juputara n'isi.[7]
Ntụaka[dezie | dezie ebe o si]
- ↑ Marshall, James. "CA 68628." Canadian Intellectual Properties Office. Canadian Intellectual Properties Office, n.d. Web. 5 May 2014. <http%3A%2F%2Fbrevets-patents.ic.gc.ca%2Fopic-cipo%2Fcpd%2Feng%2Fpatent%2F68628%2Fsummary.html%3Ftype%3Dnumber_search>.
- ↑ US698529A, Application filed by James Marshall on 1901-06-22, Application granted on 1902-04-29, https://patentimages.storage.googleapis.com/99/92/9b/7a6aa54c1be31f/US698529.pdf
- ↑ Espacenet - Bibliographic data.
- ↑ Careless, J.M.S. "Partners in Progress - Marshall Ventilated Mattress Co. Ltd." ONTARIO: A Celebration of Our Heritage. Missisauga: Canadian Heritage Gallery, Copyright © 1991, 1992 and 1993. 384-85. Print
- ↑ Warner, Bradley. "Our Company - Marshall Mattress." Marshall Mattress - Company
- ↑ Flex Group Acquires Marshall Mattress (6 March 2019).
- ↑ 7.0 7.1 Marshall Mattress - Inventor of the Pocket Coil Spring Mattress. marshallmattress.com. Archived from the original on 2018-01-04. Retrieved on 2018-01-03.