Double action may refer to:
- Double-action, a system in firearms where the trigger both cocks and releases the hammer
- Double-acting cylinder, a system in steam and internal combustion engines
- Simple expansion, a system in steam engines and their accessories where a piston has the ability to both push and pull a connecting rod
Famous quotes containing the words double and/or action:
“[The] elderly and timid single gentleman in Paris ... never drove down the Champs Elysees without expecting an accident, and commonly witnessing one; or found himself in the neighborhood of an official without calculating the chances of a bomb. So long as the rates of progress held good, these bombs would double in force and number every ten years.”
—Henry Brooks Adams (1838–1918)
“The bugle-call to arms again sounded in my war-trained ear, the bayonets gleamed, the sabres clashed, and the Prussian helmets and the eagles of France stood face to face on the borders of the Rhine.... I remembered our own armies, my own war-stricken country and its dead, its widows and orphans, and it nerved me to action for which the physical strength had long ceased to exist, and on the borrowed force of love and memory, I strove with might and main.”
—Clara Barton (1821–1912)