At first, Edison invented paraffin paper, which was only widely used as packaging material for food and candy. Later, he tried to carve the outline of the words on wax paper to form a wax lettering paper tray, put white paper under the paper tray, and then rolled it off the wax lettering paper with an ink roller. A wonderful thing happened, and clear handwriting appeared on the white paper.
Later, after many improvement experiments, Edison began to produce the copier he invented in 1976, and all of a sudden institutions, schools, institutions and organizations adopted this stencil mimeograph. Because Edison's copier is very popular all over the world, Edison deeply realized that he should invent things that people generally and deeply need.
Second, synchronous transmitter.
Early telegrams could only transmit one message at a time, but could not exchange signals at the same time. Because Edison himself was a telegraph technician, he began to improve the traditional telegraph and made a double telegraph. 1974, he developed a quadruple telegraph, which is also a synchronous telegraph. At that time, before the development of radio, synchronous transmitter was a major breakthrough.
Third, improve the telephone.
As we all know, the modern telephone was invented by Bell. In fact, the telephone can send and receive clearly, thanks to Edison's repeated experiments, which broke through the traditional pattern and made a toner transmitter, which improved the sensitivity, volume and receiving distance of the telephone in one fell swoop. Otherwise, you will often say hello when you call now! Hey! I can't hear you. I can't hear you clearly.
Fourth, the phonograph was born.
/kloc-one night in February, 877, the staff of Mengluoyuan Laboratory trembled slightly, not because of the cold, but because they heard the recording for the first time in human history: "Ma Xuan has a little sheep with white fur as snow. Wherever Ma Xuan goes, the lamb is always by her side. ...
This great invention needs no more introduction from the little jar teacher, and everyone can understand how wide its application is. The French government also awarded Sir Edison the title! Later, Edison made many improvements to the phonograph until the drum was changed to a bakelite turntable. This is not a year or two, but after decades of continuous improvement!
Five newtons
Newton was alone in the orchard at home. Because he walked and thought, he accidentally bumped into an apple tree in the garden. At this moment, an apple just hit Newton's head. Newton suddenly woke up from the problem and picked up the apple. At this time, he fell into another problem: why did the apple fall to the ground instead of floating in the sky? Finally, Newton put forward a universal law of the simplest phenomenon: gravity.