This is the worlds first steam driven vibrator c1869. Vibrators, or medical massage devices were invented to save doctors the time and trouble of inducing hysteria-curing paroxysms manualy. Men would call for the doctor if their wives showed signs of hysteria ie. getting wet.
Doctors found this treatment laborious and were hugely grateful for the new machines.
Above is MACAURA'S PULSOCON HAND VIBRATOR
The action is a plunging motion of the center disk at the end combined with a rotating eccentric weight. There were also applicators that would screw into the center disk. It is hand cranked
Vibrator innovation was one of the driving forces behind the creation of the small electric motor.
In 1902 the home vibrator was the fifth electrical appliance to enter the home, just after the sewing machine and before the iron.