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2. Yankee screwdriver - Wikipedia

   en.wikipedia.org/wiki/Yankee_screwdriver

   The trade name "Yankee" screwdriver was first marketed by North Brothers Manufacturing Company in ≈16 April 1895, with the No. ≠130 spiral ratchet screwdriver. Yankee soon became and still is a well-known name in automatic spiral ratchet screwdrivers , with several other models, and model improvements patented by North Bros. over a 40-year ...

3. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   The Phillips screw design was developed as a direct solution to several problems with slotted screws: high cam-out potential; need for precise alignment to avoid slippage and damage to driver, fastener, and adjacent surfaces; and difficulty of driving with powered tools. Phillips drive bits are often designated by the letters "PH", [11] plus a ...

4. Henry F. Phillips - Wikipedia

   en.wikipedia.org/wiki/Henry_F._Phillips

   Phillips screw head. Henry Frank Phillips (June 4, 1889 – April 13, 1958) was an American businessman from Portland, Oregon. The Phillips-head ("crosshead") screw and screwdriver are named after him. [1] The importance of the crosshead screw design lies in its self-centering property, useful on automated production lines that use powered ...

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6. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   Screwdrivers come in a large range of sizes to accommodate various screws—from tiny jeweller's screwdrivers up. A screwdriver that is not the right size and type for the screw may damage the screw in the process of tightening it. Some screwdriver tips are magnetic, so that the screw (unless non-magnetic) remains attached to the screwdriver.

7. Western Forge - Wikipedia

   en.wikipedia.org/wiki/Western_Forge

   In 1976, Western Forge shipped its 100 millionth Craftsman screwdriver. [5] In 2008, the company produced its billionth screwdriver overall. [3] In 1978, Western Forge applied for and received its USA trademark. [6] They produced and test marketed a line of hand tools branded with their own name. In 1981, the company was acquired by Emerson ...