Robertson screw
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Robertson screw — A screw with a recessed square hole. It is more commonly found in Canada than the US, especially in woodworking situations. It is easier to install and remove than a Phillips screw and does not strip the head as easily. There are four basic sizes … Dictionary of automotive terms
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
screw — [1] A spiral path along a cylinder. [2] A fastening device. A screw is like an inclined plane wrapped up. It can take a rotating force and change it into a much larger straight line force. See adjusting screw aiming screw air bleed screw air… … Dictionary of automotive terms
Robertson screwdriver — noun A type of screwdriver having a square tip, designed to drive a Robertson screw. See Also: Robertson screw … Wiktionary
Screw — This article is about the fastener. For other uses, see Screw (disambiguation). Screws come in a variety of shapes and sizes for different purposes. U.S. quarter coin (diameter 24 mm) shown for scale. A screw, or bolt, is a type of fastener… … 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
List of screw drives — Contents 1 Common types 1.1 External types 1.1.1 Square 1.1.2 Hex … 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
List of Canadians — This is a list of Canadians, people born in Canada, or who became citizens of Canada, grouped by their area of notability. This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by… … Wikipedia
