"Inverted siphons " are commonly called traps for their function in preventing smelly sewer gases from coming back out of drains and sometimes making dense objects like rings and electronic components retrievable after falling into a drain.
32.
This inverted siphon was used to draw the fire's hot fumes up the front and down the back of the Franklin stove's hollow baffle, in order to extract as much heat as possible from the fumes.
33.
It had a hollow baffle near the rear ( to transfer more heat from the fire to a room's air ) and relied on an " inverted siphon " to draw the fire's hot fumes around the baffle.
34.
Trastevere, the city region west of the Tiber, was primarily served by extensions of several of the city's eastern aqueducts, carried across the river by lead pipes buried in the roadbed of the river bridges, thus forming an inverted siphon.
35.
Unusually, to cross the valley to the south of Laodicea, instead of the usual open channel carried above the level of the city on lofty arches as was the usual practice of the Romans, an inverted siphon was employed consisting of a double pressurised pipeline, descending into the valley and back up to the city.
36.
The problem lay with the inverted siphon : the smoke had to pass through a cold flue ( which was set in the floor ) before the smoke could enter the chimney; consequently, the smoke cooled too much and the stove did not have a good draft . The inverted siphon would operate properly only if the fire burned constantly, so that the temperature in the flue was high enough to produce a draft.
37.
The problem lay with the inverted siphon : the smoke had to pass through a cold flue ( which was set in the floor ) before the smoke could enter the chimney; consequently, the smoke cooled too much and the stove did not have a good draft . The inverted siphon would operate properly only if the fire burned constantly, so that the temperature in the flue was high enough to produce a draft.
