The first working loudspeaker was invented by Alexander Graham Bell who incorporated the device into his other famous invention, the telephone. Bell was awarded the patent for the telephone in 1876 with the loudspeaker device included in the patent. However, the initial concept for the loudspeaker device was first developed in 1874 by a German inventor named Ernst W. Seimens.Know More
Although another inventor named Johann Phillip Reis also had a loudspeaker in his own telephone invention in 1861, the speaker was only able to reproduce tones and unintelligible speech. Seimens patented the principle of the dynamic or moving-coil transducer with a circular wire in a magnetic field, which inspired Bell to invent his own telephone loudspeaker.
Seimens could have easily been recognized as the inventor of the loudspeaker if not for one mistake; he patented his device as a magneto-electric apparatus and he did not use it to transmit or recreate audio. A year after the patent for the loudspeaker was granted to Bell, Seimens applied for a patent for a modified version of Bell's loudspeaker. His application was granted a year later and the diaphragm design of his patented loudspeaker came to be the iconic trumpet-like speakers of the phonograph.
A number of patents for modified loudspeaker devices were applied for by other inventors within the next few years. These inventors included Oliver Lodge, Jonathan Stroh, Anton Pollak, Edwin Pridham and Peter Jensen.Learn More
In 1498, the Chinese created the first toothbrush as it is known today with bristles and a thin handle.Toothbrushes were mentioned as far back as 3,000 BC. They were described as chew sticks that were made of twigs with split threads at the end that could be rubbed vigorously against the teeth to remove food and plaque.Full Answer >
Although widely and erroneously credited to 19th-century British plumber Thomas Crapper, the modern flush toilet was actually invented in 1596 by Sir John Harrington. His treatise, titled "A New Discourse of a Stale Subject, Called the Metamorphosis of Ajax," described an early type of flush toilet.Full Answer >
Thomas Edison's favorite invention was the phonograph. Edison invented the phonograph in 1877. It was through his efforts to improve the telephone and telegraph that he conceived the idea to record sound on tinfoil-coated cylinders.Full Answer >
John Bird invented the sextant in 1759. His work was based on prior work by John Hadley and Thomas Godfrey, who separately invented the octant. He also relied on the work of Sir Isaac Newton regarding the principles of a doubly reflecting navigation instrument.Full Answer >