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Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [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 ...
Robertson was inducted into Milton's Walk of Fame in 2007. [18] 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 ...
Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [15]: 85–86 They also allow for the use of angled screw drivers and trim head screws. The socket-headed Robertson screws reduce cam-out, stop a power tool when set, and can be removed if painted over or old and rusty.
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.
Robertson screwdriver, a square-shaped screwdriver; Robertson Panel, commissioned by the CIA in 1952 to investigate unidentified flying objects; Robertson Scholars Program, a joint program at Duke University and the University of North Carolina at Chapel Hill; Robertson graph, in mathematics graph theory; The Robertson Brothers, Australian ...
After failing to interest manufacturers, Thompson sold his self-centering design to Phillips in 1935. [4] Phillips formed the Phillips Screw Company in 1934. After refining the design (U.S. Patent #2,046,343, U.S. Patents #2,046,837 to 2,046,840) for the American Screw Company of Providence, Rhode Island, Phillips succeeded in bringing the design to industrial manufacturing and promoting its ...
Like a typical car insurance policy, the price of a rideshare endorsement depends on several rating factors, such as driving history, annual mileage, vehicle type and more. Rideshare rates vary ...
Canadian entrepreneur P. L. Robertson received a patent (U.K. No. 975,285) for the Robertson screwdriver, designed to turn a square-holed screw that he had created in 1907. The Robertson screw is not common in the U.S. (where it is called the "square drive screw") but "accounts for over 75% of all screws sold in Canada". [22]