Robertson screwdriver
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Robertson screwdriver — NOTOC A Robertson screwdriver (also called a square drive screwdriver) is a type of screwdriver with a square shaped tip with a slight taper (in the same way that flatheads, Phillips, hex, and Torx have flat, times; shaped, hexagonal, and… … Wikipedia
Robertson — People= * Several people called Archibald Robertson * B. A. Robertson, Scottish musician songwriter * Bob Robertson, former Major League Baseball player * Sir Brian Hubert Robertson, British general and politician * at least two people called… … Wikipedia
Robertson screw — noun A type of screw having a square recess in the head. See Also: Robertson screwdriver … Wiktionary
Screwdriver — Infobox tool name = Screwdriver caption =A flathead screwdriver| other name =Turnscrew classification = Hand tool types = See shape chart below used with = related = Hex key WrenchThe screwdriver is a device specifically designed to insert and… … Wikipedia
P. L. Robertson — Illustration from the 1909 Canadian patent for the Robertson screw. Peter Lymburner Robertson (1879–1951) was a Canadian inventor, industrialist, salesman, and philanthropist who popularized the square socket drive for screws (often called the… … Wikipedia
November 1910 — January – February – March – April – May – June – July August – September – October – November – December The following events occurred in November 1910: November 14, 1910: Pilot Eugene Ely makes the first takeoff from an aircraft carrier … Wikipedia
One Good Turn (book) — For other uses of the term, see One Good Turn (disambiguation). One Good Turn: A Natural History of the Screwdriver and the Screw is a book published in 2000 by Canadian architect, professor and writer Witold Rybczynski. One Good Turn was a… … Wikipedia
Invention in Canada — This article outlines the history of Canadian technological invention. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services (health care),… … Wikipedia
Canadian inventions — As necessity is the mother of invention , the range of Canadian inventions is a reflection of the particular circumstance of the nation: it is a large country with a need for innovation to help bridge the distance gap. Fittingly, many of her… … Wikipedia
List of screw drives — Contents 1 Common types 1.1 External types 1.1.1 Square 1.1.2 Hex … Wikipedia
