commutators

"commutators," or spinning electrical switches used in many battery-powered electrical devices, such as cordless drills.

unknown title 2009

I rank their commutators right up there with Limbaugh, full of hate and spin the truth.

Obama takes aim at Fox News 2009

Some device for efficiently transferring current from a rotating to a fixed point is necessary, and a system of commutators and brushes at the generator accomplishes this purpose.

Energy and Society~ Chapter 5~ Steam~ Key to the Industrial Revolution 2009

Forms of commutators and methods of regulating third brushes

July 10, 1856: Nikola Tesla's Birthday Edstock 2009

Forms of commutators and methods of regulating third brushes

Archive 2009-07-01 Edstock 2009

Now, if voltages are very high, the resistance at the point where the commutators and the brushes are in contact will create arcs which waste current and are also likely to destroy the commutator.

Energy and Society~ Chapter 5~ Steam~ Key to the Industrial Revolution 2009

It also refers to a concept generalizing the mathematical concept of a Lie group to an object whose Lie algebra is defined by commutators and anticommutators, instead of just commutators.

Matthew Yglesias » Supergroups 2007

Then we have the commutators [G, A_i (x)] = i (d/dx_i) g (x), which (except for the factor of i) is the added term in the gauge transformation.

String Theory is Losing the Public Debate Sean 2007

It is useful because (i) knowing the free-field (anti -) commutators enables one to read off matrix elements directly & (ii) the expansions of the interacting field in terms of free fields are determined by the equations of motion.

String Theory is Losing the Public Debate Sean 2007

Steel and Machinery Company was attacked by strikers-rushing out from the sidewalk, pulling drivers from the seats, smashing carburetors and commutators, while telephone girls cheered from the walk, and small boys heaved bricks.

Babbit 2004