Shilpa Jain showed me this after I asked her about giving birth to her new baby. It's a patent for a device to aid childbirth by putting mothers on a device that uses centrifugal force to help pull the baby out of its mother. Besides the wonderful pictures is this gem:
In the case of a woman who has a fully developed muscular system and has had ample physical exertion all through the pregnancy, as is common with all more primitive peoples, nature provides all the necessary equipment and power to have a normal and quick delivery. This is not the case, however, with more civilized women who often do not have the opportunity to develop the muscles needed in confinement.
When was this device patentded? 1750? 1800? Nope, 1965.