Fascinating, thanks. I had no idea there were dishwashing "appliances" that far back.
In 1950 our first 'dishwasher' was a replacement faucet. Like a shower knob, you pulled a valve and instead of coming out the faucet it came out a wand with a brush on the end of it and a button dispensed detergent from a reservoir. "Dishmaster" I believe it was called.
In 1954 we got a new house with a Hotpoint built in. Unlike the pump style of today, the motor drove an exposed impeller directly. It worked. I remember the night the 3-piece open solenoid valve stuck and flooded the kitchen. But I don't remember how it drained. Almost had to have a standalone pump, but since that never broke I never paid any attention to it. The impeller was pretty memorable. If silverware got loose in the bottom the bakelite would pretty well shred itself.