Astronauts have a device called Valsalva installed into their helmet to allow them to block their noses so that they can equalize the pressure in their ears (the Valsalva maneuver).
2. In 1985, the Soviets developed Dead Hand, a doomsday device that is still around. In the event of a total decapitation of the Soviet/Russian chain of command, an automatic system could detect a nuclear first strike and launch a retaliatory strike completely autonomously.
3. The Kleroterion was a device that was used by ancient Athenians to randomly select citizens for state councils, offices and court juries during their period of democracy.
4. Scientists have built a device named StripeSpotter that can scan the pattern of stripes on zebras, as if it were a bar code, in order to differentiate between them.
5. In 1995, an Australian doctor created the ‘Deliverance Machine.’ It is a euthanasia device which utilizes a software called ‘Deliverance.’ Patients are posed three questions via a notebook computer. If they answer yes to all three, the machine administers a lethal dose of barbiturates.
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From 1985-1987, the most powerful computing device Apple sold was the LaserWriter. It was one of the first generally-available laser printers. It had its own built-in CPU which was 50% faster than the Macs available at the time, which was needed to drive the printing engine.
7. The Tempest Prognosticator was a device that kept 12 leeches inside small bottles. They attempted to climb out of the bottles when a storm was approaching, causing a bell to ring. The number of times the bell was struck indicated the likelihood of a storm.
8. In 1961, the Canadian government hired a university professor to develop a machine named Fruit Machine to identify gay people. It was at the height of the cold war and homosexuals were thought to be more susceptible to communism.
9. The No-Contact Jacket is a defensive device that uses electric shock to discourage assailants from grabbing the wearer in unwanted situations such as in cases of assault.
10. Elink glasses is a device developed to help nearly blind people see again. It is equipped with two high-resolution screens and a 21.5 MP camera with a liquid lens and 24x zoom.
Space Pen can upside down, in frigid or hot conditions, underwater, and in zero gravity. Pressurized cartridge ink, a gel-like solid turns to the fluid to write. Pressurized nitrogen prevents air from mixing with the ink, so it cannot evaporate or oxidize.
12. A device called Stentrode functions as a brain-computer interface (BCI). It allows people with paralyzed or missing limbs to use their neural signals or thoughts to control computers and other devices.
13. A Confederate sabotage device called a coal torpedo was actually a bomb that was designed to look like a lump of coal and meant to cause a steam ship’s boiler to explode.
14. "The Thing" was a listening device that was designed by the same guy who invented the theremin. It was disguised as a gift from the Soviets to the US ambassador to spy on the US.
15. A researcher has developed a handheld "lickable screen" device that, when inserted into your mouth, can recreate all taste sensations associated with food. It relies on electrolytes inserted into 5 gels controlling the intensity of the 5 basic flavors: sour, sweet, bitter, salt, and umami.
The Mosquito Laser is a device invented to kill large numbers of mosquitoes to reduce malaria infection rates. The idea has been criticized because most areas where malaria is prevalent do not have reliable electrical power.
17. There is a device known as a derailer which is used to intentionally derail trains that enter into unauthorized areas.
18. The foot-measuring tool ("Brannock Device") used by shoe stores was invented by Charles Brannock in 1927. He was advised to make it out of plastic so regular replacements would be needed, but he insisted on steel. Today, most Brannock Devices survive 10-15 years of daily use before wearing out.
19. The "Vaportini" is a device where users heat alcoholic beverages and become intoxicated by inhaling the resulting vapors.
20. The turboencabulator is a fictional technobabble device and an in-joke among engineers. The idea was invented in 1944 and featured in Time Magazine in 1946, confusing many readers. Companies such as GE and Chrysler have released joke data sheets and training videos for the device.
21Wasabi fire alarm
Japanese researchers have created a fire-alarm for the deaf. It’s a gadget that emits a wasabi mist that will wake the endangered person and get them out of the building alive.
22. "The Momsen Lung" was a device that was used in World War 2 to escape submarines over 100 feet deep. It recycled oxygen in your breath while filtering C02. It was used only once, in 1944, by 9 members of the USS Tang after it torpedoed itself and sank in 180 feet of water.
23. Otohime a.k.a. ‘The Noise Princess’ is a gadget installed in some Japanese toilets whose sole purpose is to produce an electronic flushing sound to drown out the noise of other lavatory activities.
24. Many German households own a device designed to neatly cut a hole into a soft boiled egg, called an "Eierschalensollbruchstellenverursacher," which literally translates to "eggshell breaking point causer."
25. There is a machine that transforms concrete rubble into Lego-like building blocks. The blocks allow victims of war or natural disasters to construct their own new, earthquake-resistant houses.