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The terms "Allen wrench" (American English) and "Allen key" (British English) are derived from the Allen brand name and refer to the generic product category "hex keys". W.G. Allen filed the first related patent in 1909 for its recessed hex-driven safety screws, a safety improvement over fasteners which protruded from machinery. While other hex ...
A hex key (also, hex wrench, Allen key and Allen wrench or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ( sockets ). Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. The rods are bent to 90º, forming two ...
Alberto Alesina (1957–2020), Italian political economist. Sadie Alexander (1898–1989), American lawyer and first African American to receive a PhD in economics. Sidney S. Alexander (1916–2005), American economist. Maurice Allais (1911–2010), French economist and 1988 winner of the Nobel Memorial Prize in Economic Sciences.
Oeconomicus. The Oeconomicus ( Greek: Οἰκονομικός) by Xenophon is a Socratic dialogue principally about household management and agriculture . Oeconomicus comes from the Ancient Greek words oikos for home or house and nemein which means management, [1] literally translated to 'household management'. It is one of the earliest works ...
Torx (pronounced / tɔːrks /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron. [a] A popular generic name for the drive is star, as in star screwdriver or star bits. The official generic name, standardized by the International Organization for Standardization as ...
Mesoeconomics or Mezzoeconomics is a neologism used to describe the study of economic arrangements which are not based either on the microeconomics of buying and selling and supply and demand, nor on the macroeconomic reasoning of aggregate totals of demand, but on the importance of the structures under which these forces play out, and how to ...
A monkey wrench is a type of smooth-jawed adjustable wrench, a 19th century American refinement of 18th-century English coach wrenches. It was widely used in the 19th and early 20th century. It is of interest as an antique among tool collectors and is still occasionally used in practice. More broadly, a monkey wrench may be a pipe wrench or any ...
An adjustable spanner (UK and most other English-speaking countries), shifting spanner (Australia and New Zealand), English wrench (Turkey) or adjustable wrench (US and Canada) is any of various styles of spanner (wrench) with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.