Cutoff (steam engine)

In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reversing gear.

The point at which the inlet valve closes and stops the entry of steam into the cylinder from the boiler plays a crucial role in the control of a steam engine. Once the valve has closed, steam trapped in the cylinder expands adiabatically. The steam pressure drops as it expands. A late cutoff delivers full steam pressure to move the piston through its entire stroke, for maximum start-up forces. But, since there will still be unexploited pressure in the cylinder at the end of the stroke, this is achieved at the expense of engine efficiency. In this situation the steam will still have considerable pressure remaining when it is exhausted resulting in the characteristic “chuff chuff” sound of a steam engine. An early cutoff has greater thermodynamic efficiency but results in a lower Mean effective pressure so less average force on the piston and is used for running the engine at higher speeds. The steam engine is the only thermodynamic engine design that can provide its maximum torque at zero revolutions per minute.

Cut-off (electronics)

In electronics, cut-off is a state of negligible conduction that is a property of several types of electronic components when a control parameter (that usually is a well-defined voltage or electric current, but could also be an incident light intensity or a magnetic field), is lowered or increased past a value (the conduction threshold). The transition from normal conduction to cut-off can be more or less sharp, depending on the type of device considered, and also the speed of this transition varies considerably.

Cutoff values

Diodes

Transistors

Cutoff

Cutoff or cut off or cut-off may refer to:

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Aín

Aín (Spanish: Ahín) is a town in eastern Spain, in the province of Castellón, part of the autonomous community of Valencia.

It is home to a 13th-century castle.

References

Ağın

Ağın is a town and district of Elazığ Province of Turkey. The mayor is Yılmaz Serttaş Nationalist Movement Party (MHP). The population of the town is 1844 as of 2010.

History

The city of Ağın was initially founded by Armenians who had migrated there from Iran. In 1896, the city was evenly divided between Muslims and Armenians. The city was recognized for its wealth and had previously escaped the 1895-1896 Hamidian massacres through a ransom payment by the Armenians of 1500 Turkish gold pounds.

On September 15, 1896, three weeks after the raid of the Ottoman Bank by Armenian Dashnaks as a response to the Hamidian massacres, Turkish authorities organized a new massacre in the city of Ağın. Ottoman troops killed "upwards of 2000 Armenians" including "many women and children" according to a report by the French Ambassador. Of the 1500 houses located in the Armenian quarter of Ağın, 980 were pillaged and burned. Ağın was chosen to be the target of the massacre because the leader of the bank raiding party who was killed at the start of the raid, Papken Siuni, was native to the city of Ağın. According to a report by the British Consul at Harput, the pretext used to attack the city's Armenian quarter was that the Armenians of the said city were "set to cause trouble". The same report by the Consul said that there were no revolutionary movement whatever and no powder magazine exploded during the massacre. A few pistols and revolvers were found in the ruins of the burnt houses.

AN

An is an indefinite article in the English language; see also: a and an.

An, AN, aN, or an may also refer to:

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