Compagnie Électro-Mécanique (CEM) was a French

electrical engineering Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...

manufacturer based in

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

Le Havre Le Havre is a major port city in the Seine-Maritime department in the Normandy (administrative region), Normandy region of northern France. It is situated on the right bank of the estuary of the Seine, river Seine on the English Channel, Channe ...

Lyon Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, north ...

Le Bourget Le Bourget () is a commune in the northeastern suburbs of Paris, France. It is located from the center of Paris. The commune features Le Bourget Airport, which in turn hosts the Musée de l'Air et de l'Espace (Air and Space Museum). A very ...

, Nancy,

Dijon Dijon (, ; ; in Burgundian language (Oïl), Burgundian: ''Digion'') is a city in and the Prefectures in France, prefecture of the Côte-d'Or Departments of France, department and of the Bourgogne-Franche-Comté Regions of France, region in eas ...

. It was a subsidiary company of

Brown, Boveri & Cie Brown, Boveri & Cie. (Brown, Boveri & Company; BBC) was a Swiss group of electrical engineering companies. It was founded in Baden bei Zürich, in 1891 by Charles Eugene Lancelot Brown and Walter Boveri who worked at the Maschinenfabrik Oer ...

Production

The company produced

DC motor A DC motor is an electrical motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either el ...

AC motor An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside roto ...

s, generators,

turbine A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical ...

transformer In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple Electrical network, circuits. A varying current in any coil of the transformer produces ...

s and railway locomotives. Examples of railway locomotives included

SNCF Class C 61000 The SNCF Class C 61000 (+ TC 61100) diesel locomotive, diesel shunters were built by Compagnie Electro-Méchanique (CEM) between 1950 and 1953. 48 locomotives were built, numbered C 61001–61048. They were used for heavy shunting duties around L ...

and

SNCF Class CC 65500 The SNCF Class CC 65500 diesel locomotives were built by CAFL (manufacturer), CAFL and Compagnie Électro-Mécanique, CEM between 1955 and 1959. They were used on heavy express railway freight in the Paris area, being commonly seen on the Grand ...

Acquisition by Alsthom

It was acquired by

Alsthom Alstom SA () is a French multinational rolling stock manufacturer which operates worldwide in rail transport markets. It is active in the fields of passenger transportation, signaling, and locomotives, producing high-speed, suburban, regional a ...

in 1983.

References

Alstom {{France-rail-transport-stub