The fast pace of technology change in the 1920s brought us the lie detector, traffic signal, bubble gum and Penicillin. An all-electronic moving-image television system somewhat similar to that used today was invented and demonstrated in 1929. The 1930s were not less invention-intensive bringing us the jet engine, helicopter, tea bags, sticky tape, ballpoint pen and the first photocopier.
However, somewhere between these great world-changing inventions there were some fun and sometimes even hilarious inventions the world has forgotten.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9b5OADDDo4viD2jS3j4XRlEAD-hnhhMQEz5ZSPx0yTw2GSbuLE2esluj1Rr5gCKhNL61KWD9Hyq-pMew3ZZlmyKgYQATE_YZzuQ6Lu__nJut2PjWZOOVetgtAGkVmnkyphQ7CNIgJfIYO/s640-rw/cool-inventions-all-terrain-car.jpg) |
All terrain car able to descend slopes up to 65 degrees (England, 1936) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUykqccX_wwQMGQRrN0aznh5cEH25ITSrSIAlvm-ytXeuOi_dM16CDBT5y6Z3-lLwbYTzktdSt7Gx_Okqogwd5DsurhyphenhyphenwpBQbW4W9IVcappKD9MJC9EDVqKouVl_WUZ81PP9ZA4N_Hj2EE/s640-rw/cool-inventions-amphibious-bycicle.jpg) |
The Cyclomer, a bicycle on land and water can ride with a load of 120 pounds (Paris 1932) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzW74A5lQw-vv8iRHRObKaH1uLo2IwN5hpKIJqfHOf0dZAz_eZSMUd71V94VPbA3A9PF23yFnNE2waQNuAoe53vroOAJZEyYxEaifiKlqwL_wDDb4EN98kkPN-fomb5edjUt3f0Czq691X/s640-rw/cool-inventions-bed-glasses.jpg) |
Hamblin glasses. A pair of spectacles especially designed for reading in bed (England 1936) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhruQEWsDbFOkqZZVXHWZnngEGIorV6LaGrofWM4lRbDmPNiiXCu_ZO3eGf30AoaOvJBXpTpzv8jyO-jEM-2YBklTWQygx4gkx7D43evDjiLqK2AIMZURfwS95lIBKn_0gmgEJpP7960r16/s640-rw/cool-inventions-bullet-proof-glass.jpg) |
Bulletproof glass, demonstration by the best rifle man of the New York police, 1931 |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglOxeDDWUCdHj-AsVyjEyxyll_r_cWTUPXlILxj2b3MY8QmzQykec0U9Ei5PY7VCNS_a3Lna0-7j1b-UZEymxD78Sr6pAxImrYpc4KHmZ9zxcuY9f8d3ls3juavVKBfnfkFRn3xeuSQEKn/s640-rw/cool-inventions-car-shovel.jpg) |
Kind of shovel on a car. Purpose: reducing the number of casualties among pedestrians (Paris 1924) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjegZD5pAJCpIKHfb8FkMI1tLthm1Gi7SsvQMDIfwxaiXyVvDyqzK6TS4vRc466Nfzm_8eaWAQo9qdUHwxJa_KzWK4MhRuzYIoYleaNkuAxIU7RQIghTRJ8QeBVGvF8opy3LSh7M32aYmYb/s640-rw/cool-inventions-electric-jacket.jpg) |
Electrically heated vest, developed for the traffic police in the United States. The power is supplied by electric contacts in
the street (USA 1932) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhSPZyswU9aL1WDpqM-mlnyXO9JgHwo8WxxDPvhAjFsKSmF_rmINlarqzk9zoZW2o4pQwdRI7QNmlZEwx3BPJrFnD7YX4Fkt5b2rqyBnujNloJ_NEx87mnhbP5LdN7LxO5TaXM17Qm8LzUb/s640-rw/cool-inventions-extensible-caravan.jpg) |
Extensible caravan, built by a French engineer, 1934 |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5xS4ROi2fLmUlnL6rTd5a8lX5kly3lY1l-YZi9WSbQqEF0_fn0uHSWsQL8JfDMq_DFggnJH3bv4EDksc_cDZjkgcquSIOaom7J8P7wmoZncUK6uedoxYhWpEqztsw68YD9RNSEDbo_9M9/s640-rw/cool-inventions-face-protection.jpg) |
Used to protect ones face from snowstorms. Canada, Montreal, 1939 |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7I0IbfUKve5BtAf481lwpIlHgAJ0nTUi7YsH2uyYb6g4bHK508ICSbkDu0gyhpOuBAWExhKSgzadXF-fpyo1BKv3G_BfYDFqCT_nGH13l3tLX7hGKDy8aJ5RS89-WNrmmGb01ClKTqu8J/s640-rw/cool-inventions-faxed-newspaper.jpg) |
In 1938 the first wireless newspaper was sent from WOR radiostation in New York. Photo shows children reading the children’s page of a Missouri paper |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEif9j4XIeGSXFMa22jsG7W1es1gq1enbmM5XQA1C9Zasp9fvA9GOXV5Axwj_YwZau-6W-04jMC8l_5S-FXWJEF5vwpTJ_9wxgoXnzx84_hPtnvWpzR7p8_BnBd_OAo59ITj7Gvvd1Ja3xOP/s640-rw/cool-inventions-folding-bridge.jpg) |
Folding bridge for emergencies, invented by L. Deth can easily be transported on a handcart (Netherlands, 1926) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1D4TjsX6hhrH95CoLsoRcS6ImhGu5S9Ya330GiDtYch9ijIv9skWtRGQayC-4E-68Ui9E-bL2CHybXkvmwvu7K90zVUsff2YgeVzGJtaZYpOHSsnGwWNTdnVG_96fbvWBBMaNJ62Fs-PP/s640-rw/cool-inventions-gas-war-pram.jpg) |
Gas War Resistant Pram (England, Hextable, 1938) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiTYe3ocVVhZO3yYas0dVmtggJwpAOdRE7SM-c_0mnRX_d-zVo0N82_6pdxhyphenhyphen3hkT5lFicw4krMbGXhWI6bRRPqqv9CvMxluMe2VZ3ZnRv32NN4pW90HhgXcNTLoHnFaXNVB_HSpP0YRRZ/s640-rw/cool-inventions-gps1.jpg) |
Early GPS (1932) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixAY7VXm1N5ONJzatM3BEJ6NbI3r_JsZ5a_NWtC177xqgW1yWmPiZ0V7kcX4Y46OU2qeq7c_g3tr5I3OoEN2tkwQxofGnkbEQmlIgOzf7y76_VZnVet6AEdJ4oA4J6KGRvPvkaVWMcEZLn/s640-rw/cool-inventions-gps2.jpg) |
Early GPS (1932) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZ23zG6uIIVSYTLdQgYz_mInJsTwL8oRwvseWwWr5IPQIOxtT9eo6IyUvZHsYRm3gJECWeU6uWMCD_dB-8hegrlvJV3CQuGJXC2ctaJ3kBJ3ojxROWrTXQIkNZijyGGPy8GGkvGY3b_WZB/s640-rw/cool-inventions-hat-radio.jpg) |
Portable radio in a straw hat, made by an American inventor, 1931 |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5jlLLYBiyAZriKSuL92XgJd1Rnmwe1pseje7JFRO08eZN6dyAji_1plYvFwPeYpwAjVGMr9VzFN2fipLp60k6FfHpNRLeJRe6Bn6MnU35eSZ9vIQDaIt-u3x0-pvvGcxOJRP1C7R94jtQ/s640-rw/cool-inventions-life-jacket.jpg) |
A group of youngsters tied a bike tyre around the body as a swimming aid (Germany 1925) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUnnYIWd4WVjaji78K45gdLFxyJRjGniBg2cn1NcVZgAS3iSIsgy4T0Naq1CfbkQpj0OGXKbxP_YVvkcTz-S9CdMWflD_21mPaqeqgjVWmpX1ektnSCLXnTjpTUT6SvaK_M9gwNpqEKNZm/s640-rw/cool-inventions-one-wheel-motorcycle.jpg) |
One wheel motorcycle (invented by Italian M. Goventosa de Udine). Maximum speed: 150 kilometers per hour ( 93 Mph), 1931 |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgt-9iXsr92ptL_Ho-pWUOTPMaoQtyqgiHJX6ktiU7FcDiRFgpaiYCGm-GJI_xqyjn7tJ-ODq3j7mckPHU4ce68ex_XFFoE6adX5ZPmeijT05FZeICzy4yeLPt9fOQ3freUi-ae7QFFqCFg/s640-rw/cool-inventions-piano-bedridden.jpg) |
Piano especially designed for people who are confined to bed (UK 1935) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYedxYZbSSaGnsJ3hSLuxDPuZ2rmX1AKz_P56aalz0ahw0hUY9rCfFKxH0ynS4pxu1IWMVpf4sGo3HdKp9QfL7LSLwrnp-1lgdByY5zi6gXTo_8LWnAS1l8JJi-6nFxlRHTq4s4x-YLK-G/s640-rw/cool-inventions-radio-pram.jpg) |
Pram provided with a radio, including antenna and loudspeaker, to keep the baby quiet (USA 1921) |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY00Pg8dIPH2Fk4scfyPnazLCTdkGcrVbvTCdWFTBX7TCPJW-aPto966Nzz60d013z6-Y4Z29GIB_Tbiu4KC7wfOjJzVJZpavIueXwJ3cajDtOtJ1CoRVc-OJyB9wqqGo014wce5MWnyZe/s640-rw/cool-inventions-rev-camera.jpg) |
Colt 38 carrying a small camera that automatically takes a picture when you pull the trigger.
At the left: six pictures taken by the camera (New York, 1938) |
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