Cross-head lossis Phillips screws muaj qhov X-puab qhov thiab tau tsav los ntawm tus ntoo khaub lig-lub taub hau ntsia hlau, tsim los ntawmxyoo 1930 rau siv nrog cov tshuab ntsia hlau, txhob txwm ua kom tus neeg tsav tsheb yuav caij tawm, los yog tawm, nyob rau hauv strain kom tiv thaiv dhau-tightening.
Thaum twg cov ntsia hlau hla lub taub hau tawm?
Txhawm rau tiv thaiv cov kev tsis zoo no, J. P. Thompson patented ib lub hau ntswj nrog tus ntoo khaub lig recess nyob rau hauv 1933. Nws muag patent rau Phillips Screw Company. Nws txhim kho qhov profile thiab qhia cov ntsia hlau rau kev ua lag luam hauv 1936/37. Cov flanks ntawm Phillips cross-head screws taper tawm ntawm lub ntsis.
Leej twg tsim lub taub hau ntsia hlau?
Henry Frank Phillips (Lub Rau Hli 4, 1889 - Plaub Hlis 13, 1958) yog ib tug neeg ua lag luam Asmeskas los ntawm Portland, Oregon. Lub taub hau Phillips ("crosshead") ntsia hlau thiab ntsia hlau ntsia tau muaj npe tom qab nws.
Thaum twg lub taub hau tiaj tus ntsia hlau tsim?
In 1744, lub tiaj-blade me ntsis rau tus kws ntoo lub brace tau tsim, tus precursor rau thawj lub taub hau yooj yim. Handheld screwdrivers thawj zaug tshwm sim tom qab 1800.
Thaum twg lawv tau tsim Phillips taub hau ntsia hlau?
Lub Xya Hli 7, 1936: Tau tuav � Phillips Screws Up the Toolbox. Henry F. Phillips tau txais patents rau ib hom tshiab ntawm cov ntsia hlau thiab cov ntsia hlau tshiab uas xav tau los ua kom nws ua haujlwm.
