The Hohenzollern Locomotive Works (Aktiengesellschaft für Lokomotivbau Hohenzollern) was a German locomotive-building company which operated from 1872 to 1929. As well as conventional steam locomotives the company also built fireless steam locomotives and diesel locomotives.
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Hohenzollern built a large number of fireless locomotives, including some articulated fireless locomotives with a cab at each end. Hohenzollern's fireless locomotives were unusual in having inside cylinders. The German for fireless steam locomotive is Dampfspeicherlokomotive, meaning steam storage locomotive.
Hohenzollern articulated fireless locomotives
Each locomotive had two 2-axle bogies. On no. 1685 only one axle was powered but, on the others, two axles were powered. For an explanation of wheel arrangements see: AAR wheel arrangement. Nos. 1685 and 2107 (which were designed for use in mines) had air-cooled condensers to condense the exhaust steam.
| Works no. | Date built | Gauge | Wheel arrgt | Name | Condenser |
|---|---|---|---|---|---|
| 1685 | 1904 | 840 mm | 1A-2 | BERGMANN | Yes |
| 2107 | 1907 | 840 mm | B-2 | GNOM | Yes |
| 2483 | 1909 | 780 mm | B-2 | - | No |
Hohenzollern supplied a 1,200 horsepower diesel-mechanical locomotive to the Russian State Railways in the 1920s. This had a constant-mesh gearbox with an individual electromagnetic clutch to engage each gear.
Around the same time, Russian State Railways also took delivery of a 1,200 hp diesel-electric locomotive, designed in Russia by Professor Lomonosov. There is some dispute as to whether this was also built by Hohenzollern or by Esslingen Machine Works. Ref: [1]