Electromechanical teenager repellantHoward Stapleton (Merthyr Tydfil, Wales) invented an electromechanical teenager repellant -- a device that makes annoying high-pitched noise designed to be audible to teenagers but not to adults. The "Mosquito" ultrasonic teenage deterrent aims to solve the problem of unwanted gatherings of youths and teenagers in shopping malls, around shops and anywhere else they are causing problems, claiming to be "the most effective tool in our fight against anti social behaviour". He later used that same technology to make telephone ringtones that are audible to teenagers but probably not to their teachers.
Apparatus for facilitating the birth of a child by centrifugal forceThe late George and Charlotte Blonsky (New York City and San Jose, California) invented a device (US Patent #3,216,423) to aid women in giving birth -- the woman is strapped onto a circular table, and the table is then rotated at high speed.
In their patent application, Blonsky and Blonsky explained the need: "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 civilised women, who often do not have the opportunity to develop the muscles needed in confinement."
Therefore, wrote Blonsky and Blonsky, they would provide "an apparatus which will assist the under-equipped woman by creating a gentle, evenly distributed, properly directed, precision-controlled force, that acts in unison with and supplements her own efforts". The Blonskys explained: "The foetus needs the application of considerable propelling force." They knew how to supply that propelling force.
The rest of their patent - eight very detailed pages altogether - specifies exactly how to do it. The design includes some 125 basic components, including bolts, brakes, wing nuts, a massive concrete floor slab, a vari-speed vertical gear motor, a speed reducer, more wing nuts, sheaves, stretchers, shafts, thigh members, a butt plate, aluminium ballast water boxes, more wing nuts, pillow clamps, a girdle member, and some additional wing nuts.