Alternators made in 1909 by Ganz Works in the power generating hall of a Russian hydroelectric station (photograph by Prokudin-Gorsky, 1911).
In what is considered the first industrial use of alternating current in 1891, workmen pose with a Westinghouse alternator at the Ames Hydroelectric Generating Plant. This machine was used as a generator producing 3,000-volt, 133-hertz, single-phase AC, and an identical machine 3 miles away was used as an AC motor.
Diagram of a simple alternator with a rotating magnetic core (rotor) and stationary wire (stator) also showing the current induced in the stator by the rotating magnetic field of the rotor.
Alternator mounted on an automobile engine with a serpentine belt pulley (belt not present.)

Electrical generator that converts mechanical energy to electrical energy in the form of alternating current.

- Alternator

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German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad.

Werner von Siemens, co-founder of Siemens & Halske.
First electric locomotive, built in 1879 by company founder Werner von Siemens.
The company built airplanes during World War I, for example this Siemens airplane in 1926.
British Siemens advertisement from the 1920s era.
Prisoners around 1944 working at a Siemens factory in KZ Bobrek, a subcamp of Auschwitz concentration camp.
A Siemens truck being used as a Nazi public address vehicle in 1932
Siemens Factory and Ravensbrück concentration camp.
A 1973 Siemens electron microscope on display at the Musée des Arts et Métiers in Paris.
A Siemens Velaro high speed train in service on the Köln–Frankfurt high-speed rail line
Siemens power generating wind turbine towers
Siemens C651 trains for the Singapore MRT at Ulu Pandan Depot
A Siemens high-voltage transformer
A Siemens SPECT/CT scanner in operation
A Siemens wind power generator
A Siemens steam turbine rotor
A Siemens train in operation
Bangkok Skytrain built by Siemens
Siemens' headquarters, Munich (front)
Siemens office building in Munich-Giesing
Siemens-Tower in Berlin-Siemensstadt
"Wernerwerk" (Werner's Factory) in Berlin-Siemensstadt
Wernerwerk II in Berlin-Siemensstadt
Wernerwerk XV in Berlin-Siemensstadt
Siemens office building in Erlangen
Siemens office building in Erlangen
Siemens site in Munich-Perlach
Siemens Forum Munich
Siemens Gas Turbine Factory, formerly Ruston & Hornsby Pelham Works, Lincoln, England

In 1881, a Siemens AC Alternator driven by a watermill was used to power the world's first electric street lighting in the town of Godalming, United Kingdom.

Tell-tale (automotive)

Idiot light or warning light, is an indicator of malfunction or operation of a system, indicated by a binary illuminated light, symbol or text legend.

A group of tell-tales
Graphical tell-tales
A malfunction indicator lamp

Such early detection of problems with, for example, engine temperature or oil pressure or charging system operation is not possible via an idiot light, which lights only when a fault has already occurred – thus providing no advance warnings or details of the malfunction's extent.

Underground coal gasification

Industrial process which converts coal into product gas.

The underground coal gasification process.

The Newman Spinney project was authorised in 1957 and comprised a steam boiler and a 3.75 MW turbo-alternator to generate electricity.

Wardenclyffe Tower

Early experimental wireless transmission station designed and built by Nikola Tesla on Long Island in 1901–1902, located in the village of Shoreham, New York.

1904 image of Wardenclyffe Tower
Tesla's Magnifying "Apparatus for transmitting electrical energy" covered the basic function of the device used at Wardenclyffe.
Tesla with his "magnifying transmitter", Colorado Springs, 1899, in photo taken for his 1900 Century Magazine article. This photo was a double exposure; Tesla was not actually in the room when the device was operating.
Artistic representation of the station completed, including the tower structure.
Tesla's Wardenclyffe plant on Long Island circa 1902 in partial stage of completion. Work on the 55 ft cupola had not yet begun. There is a coal car parked next to the building.
Demolition of the Wardenclyffe tower started in July 1917
Stanford White Building at the corner of Tesla Street and NY 25A (2009)

Power for the entire system was to be provided by a coal fired 200 kilowatt Westinghouse alternating current industrial generator.

Konono Nº1

Musical group from Kinshasa, Democratic Republic of the Congo.

Konono Nº1 performing in May 2007

The group's amplification equipment is equally rudimentary, including a microphone carved out of wood fitted with a magnet from an automobile alternator and a gigantic horn-shaped amplifier.

M62 locomotive

Soviet-built diesel locomotive for heavy freight trains, exported to many Eastern Bloc countries as well as to Cuba, North Korea and Mongolia.

M62 locomotive in Baranovichi, Belarus
First made M62-1
ST44-001, the first of the class, preserved at Stacja Muzeum in Warsaw
ST44-1237 in 2013
311D by Newag, owned by PCC Rail
207E – electric M62 on show at Trako industry fair, Gdańsk, September 2017
Naeyŏn 706, a Soviet-built M62-type diesel locomotive obtained second-hand from Germany
Kŭmsŏng 8002, a North Korean-built copy of the M62.
Czech 781.600 locomotive in museum
Hungarian locomotive M62 271

The two-stroke diesel engine and the main alternator are mounted on a steel frame.


Term used in aerodynamics, firearms ballistics, and automobiles.

Forces can be described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate.

Large alternators have significant losses due to windage.

British Rail Class 27

British Rail's Class 27 comprised 69 diesel locomotives built by the Birmingham Railway Carriage and Wagon Company (BRCW) during 1961 and 1962.

27066 at Carlisle.
27005 at Glasgow Queen Street.
27001 at the Bo'ness & Kinneil Railway
27066 on the Dean Forest Railway
D5401 (27056) at the Great Central Railway

It was later decided that as the Mark 2 stock was dual (steam or electric) heated, to convert half the 27/1 fleet to electric train heat, by replacing the train heating boiler with a Deutz 8-cylinder, air-cooled diesel engine and alternator.

Pneumatic motor

Type of motor which does mechanical work by expanding compressed air.

The Victor Tatin airplane of 1879 used a compressed-air engine for propulsion. Original craft, at Musée de l'Air et de l'Espace.
The first mechanically powered submarine, the 1863 French submarine Plongeur, used a compressed-air engine. Musée de la Marine (Rochefort).
Mekarski compressed air tram, 1875
Pneumatic Locomotive with attached pressure container used during the construction of the Gotthard Rail Tunnel 1872-1880.<ref>Braun, Adolphe: Luftlokomotive in "Photographische Ansichten der Gotthardbahn", Dornach im Elsass, ca. 1875</ref>
A compressed air locomotive by H.K. Porter, Inc., in use at the Homestake Mine, South Dakota, between 1928 and 1961

The compressed-air engine is used to activate an alternator, which extends the autonomous operating capacity of the car.


Historic market town, civil parish and administrative centre of the Borough of Waverley in Surrey, England, 4 mi south-south-west of Guildford and 30.5 mi south-west of London.

The spire of Church of St. Peter & St. Paul with Charterhouse School visible in the distance
Introduction of street lighting to Godalming, November 1881 (from The Graphic)
Civil parishes in the borough of Waverley
The southeast façade of Godalming Borough Hall in 2016
The Pepperpot, Godalming's former town hall
17th Century Gable Ends
Godalming wharf at the end of the Navigation
Statue of Thomas Sutton on Founder's Court at Charterhouse School
The Kings Arms at the centre of Godalming
Display in the Godalming Museum

It was Calder and Barrett who installed a Siemens AC Alternator and dynamo, powered by a waterwheel at Westbrook Mill, on the River Wey.