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In this episode we will watch a historic German vacuum cleaner, the Protos model, produced at the Siemens-Schuckert plant in Berlin in the late 1920s. At that time, it was one of the most popular and more appreciated vacuum cleaners - in a test conducted in 1926 with the participation of the agricultural college in Berlin (Landwirtschaftliche Hochschule Berlin), it received the first prize.
In the video we will look for historical traces of this vacuum cleaner and, above all, we will disassemble and clean the device. The Protos presented here is in its original condition, although some elements - such as the connection cable - would require replacement if the device were to be still used. Inside there is an original motor powered by 110-125 V - we will also carry out a safe test of starting themotor at reduced voltage. An interesting feature is the heating element located inside the air outlet.
Initially - probably mistakenly - I took it for a heater (for connecting a hair dryer), but I think they are resistors used to regulate/stabilize the motor speed. This remains to be explained…
Protos on the website of the German Museum of Things (Museum der Dinge):
sammlung.museu...
Advertising poster from 1927 on the website of the German Digital Library:
www.deutsche-d...