Vintage Zenith Rheostat

£ 24.00
A sliding dual tube rheostat by Zenith. There are some small cracks in the stand originating from the screws. One tube has 1. 5 Amps and 72 Ohms, the other has 5 Amps and 8. 7 Ohms.
The "fingers" can be moved along the coil of resistance wire by a sliding knob thus changing the "tapping" point. Wire-wound rheostats made with ratings up to several thousand watts are used in applications such as DC motor drives, electric welding controls, or in the controls for generators.