Century Dictionary and Cyclopedia
- n. A contrivance for preventing the access, as to a room, of the effluvia arising from drains and sinks.
- n. A reservoir and escape-valve placed at the joints or higher points of a water-main or pipe-line to allow the escape of air which may accumulate in the pipes.
- n. A small funnel of glass fastened in the inside of a barometer-tube to catch any bubbles of air that would otherwise rise through the mercury into the vacuum-chamber.
“It is, on the whole, advisable to make the pump of flint glass, or at all events the air-trap tube and the fall tubes.”
“This is easily attained by regulating the main mercury supply at the pinch cock situated between the tube from the upper reservoir and the air-trap tube, the other cocks being almost wide open.”
“An air-trap opens into the Sala dei Gendarmi, so called because two gendarmes in court uniform are there stationed.”
“On the contrary, on the contrary," said Mrs. Mivers, triumphantly; and she proceeded philosophically to explain that all the fevers, aches, pains, and physical ills that harass the poor arise from the want of an air-trap in the chimney and a perforated network in the window-pane.”
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