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electric dental drill
this invention was invented by green, and it was a development that revolutionized dentistry -
first telephone
the telephone was made by Alexander Graham Bell, he first successful bi-directional transmission of clear speech by Bell and Watson was made on March 10, 1876, when Bell spoke into the device, "Mr. Watson, come here, I want to see you." and Watson answered. -
the cash register
this invention was created by James Ritty and John Birch, The Ritty Model I was invented in 1879 after seeing a tool that counted the revolutions of the propeller on a steamship. It was called Ritty's Incorruptible Cashier and it was invented for the purpose to stop cashiers of pilfering and eliminating employee theft or embezzlement. -
the light bulb
this invention was made by Thomas Edison, After many experiments, first with carbon filaments and then with platinum and other metals, Edison returned to a carbon filament. The first successful test was on October 22, 1879; it lasted 13.5 hours. -
the electric iron
this was invented by Henry Seeley, it is a small appliance used to remove wrinkles from fabric. It is also known as a clothes iron, flat iron, or smoothing iron. The piece at the bottom is called a sole plate. Ironing uses heat energy, chemical energy, electrical energy, and mechanical energy. -
the thermostat
the thermostat was invented by Warren Johnson, the thermostat switches the heating system on and off as necessary. It works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. -
the muffler
this invention was created by Milton Reeves, it is a device for decreasing the amount of noise emitted by the exhaust of an internal combustion engine. -
air conditioning
this was invented by Willis Carrier. it was Designed to improve manufacturing process control in a printing plant, Carrier's invention controlled not only temperature but also humidity. -
the airplane
this invention was created by the wright brothers, the Wright Flyer III was capable of fully controllable, stable flight for substantial periods. The Wright brothers credited Otto Lilienthal as a major inspiration for their decision to pursue manned flight. -
radio alarm clock
this invention was made by James Reynolds, the clock radio is an alarm clock and an AM/FM radio integrated in one device. They are integrated so that the radio's sound may be used as an alarm. This allows the sleeper to be awakened by radio music/news or a buzzer sound.
