MUCH MUCH Earlier
You are giving your youth away now.
This is a carpet shampooer, and dates back at least to the early 1960s when it was known as a Bex Bissel.
Basically the orange bit is a tank in which you mixed water and carpet shampoo - typically 1001 (God does the advert on the link ever take me back). There was a trigger on the hand grip which released the liquid onto sponge rollers which moved as the shampooer was moved back and forward. We are not talking deep cleaning here. However the only alternative at the time would have been something like a Hoover Shampoo Polisher or down on your knees with a scrubbing brush
You let the carpet dry and vacuumed the residue off - well, in theory you did!
Very popular in its day, the one above was from the 1970s - my Mum had one just like it.
There was a later version with similar tank which had electrically driven rollers, indeed I think there may have been one in the catalogue scans which Anthony recently loaded.
I would say the introduction and popularity of the orange Vax cleaner just about killed these stone dead. Unless its something like 99p, don't waste your money
Al