Crochat was a French railway equipment construction company founded in 1899 by Henry Crochat. It is best known for building locomotives and railcars with petrol-electric transmission.
Reference
1899 - Company founded by Henry Crochat1908 to 1918 - Construction of 420 petrol-electric locomotives for le Ministère de la Guerre (Ministry of War) and a small number for other customers. See table below for details1924 - Acquisition of patents by Decauville1926 - Foundation of Société Auxiliaire d'Entreprise (SAE) by Henry Crochat1928 - Company liquidatedPetrol-electric locomotive typesThis is not a complete list.
Crochat and Colardeau
Henry Crochat obtained some patents jointly with Emmanuel Colardeau, e.g. patent US1416611. There is no evidence that Colardeau was involved in Crochat's railway business but he may have been involved, with Crochat, in the design of the Saint-Chamond (tank).
Crochat AT1 petrol-electric railcar (1922) from Tramway de Pithiviers à Toury preserved at Musée des transports de PithiviersFive Crochat 6-axle locomotives of 1918 (ex Salins du Midi) preserved at Chemin de fer touristique du Tarn. One of these is a historical monumentDecauville-Crochat AT3 petrol-electric railcar (1926) preserved at Le p'tit train de Saint-TrojanCrochat standard gauge locomotive 44 L 4 N preserved at the Museum of Engineering in Angers (not on public view)
