Imyitozo y'amashanyaraziyakozwe nkigisubizo gikurikiraho gisimbuka muburyo bwa tekinoroji yo gucukura, moteri yamashanyarazi. Imyitozo y'amashanyarazi yahimbwe mu 1889 na Arthur James Arnot na William Blanch Brain w'i Melbourne, Ositaraliya.

Wilhem na Carl Fein bo muri Stuttgart, mu Budage, bavumbuye imyitozo ya mbere yimukanwa mu 1895. Black & Decker bavumbuye imyitozo ya trigger-switch, pistolet-grip portable mu 1917. Ibi byaranze intangiriro yigihe cyo gucukura. Imyitozo y'amashanyarazi yatejwe imbere muburyo butandukanye no mubunini mu binyejana byashize kubisabwa byinshi.

Ninde wahimbye imyitozo ya mbere ya Cordless?

Imyitozo hafi ya yose itagira umugozi ikomoka kuri S. Duncan Black na Alonzo Decker yo mu 1917 ipatanti y’imyitozo ngororamubiri ikoreshwa mu ntoki, ibyo bikaba byaratumye inganda zigezweho zikoreshwa n’ingufu. Ikigo bafatanyije gushinga, Black & Decker, cyabaye umuyobozi wisi mugihe abafatanyabikorwa bakomeje guhanga udushya, harimo umurongo wambere wibikoresho byamashanyarazi byagenewe abakoresha urugo.

Nkuko abakozi bafite imyaka 23 ya Rowland Telegraph Co, Black, umunyabukorikori, na Decker, uruganda rukora ibikoresho no gupfa, bahuye mu 1906. Nyuma yimyaka ine, Black yagurishije imodoka ye kumadorari 600 maze ashinga iduka rito ryimashini i Baltimore. hamwe n'amafaranga ahwanye na Decker. Isosiyete nshya yibanze ku kuzamura no gutanga udushya twabandi. Bashakaga gukora no kubyaza umusaruro ibicuruzwa byabo nyuma yo gutsinda, kandi icya mbere cyari compressor yindege yikurura abafite imodoka kuzuza amapine yabo.

Mugihe cyo gutekereza kugura imbunda ya Colt.45 yikora, Black na Decker babonye ko ubushobozi bwayo bwinshi bushobora kugirira akamaro imyitozo idafite umugozi. Mu 1914, bahimbye pistolet na trigger switch yemerera kugenzura ingufu imwe, hanyuma mu 1916, batangira gukora cyane imyitozo yabo.