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Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
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 ...
Wera Tools is a global tool manufacturer. [15] [16] Its global headquarters and European sales team is based in Wuppertal, Germany.Wera has wholly owned regional subsidiaries, for example in the United Kingdom (based in Chesterfield, Derbyshire, England) and North America (based in Ontario, Canada), where it is known as Wera Tools Inc. Outside these areas, the company operates through a ...
[3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily removed if painted over, or old and rusty. [3]: 85–86 In industry, they speed up production and reduce product damage.
A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver has been replaced in many workplaces and homes with a more modern and versatile tool, a power drill, as they are quicker, easier, and can also drill holes. The shaft is usually made of ...
The town also has an elementary school named after Robertson that opened in 2009. [19] In 2002, the documentary Ode to the Robertson Screwdriver aired on the History Television's Turning Point series, describing Robertson's life and his career involving the invention of the eponymous screw. [7] [6]