Bells Telephone, 1877
by Science Source
Title
Bells Telephone, 1877
Artist
Science Source
Medium
Photograph - Photograph
Description
Alexander Graham Bell is commonly credited as the inventor of the first practical telephone. He was the first to obtain a patent, in 1876, for an "apparatus for transmitting vocal or other sounds telegraphically", after experimenting with many primitive sound transmitters and receivers. Bell's telephone transmitter (microphone) consisted of a single permanently magnetized bar magnet having a small coil or bobbin of fine wire surrounding one pole, in front of which a thin disc of iron was fixed in a circular mouthpiece. The disc served as a combined diaphragm and armature. On speaking into the mouthpiece, the iron diaphragm vibrated with the voice in the magnetic field of the bar-magnet pole, and thereby caused undulatory currents in the coil. These currents, after traveling through the wire to the distant receiver, were received in an identical apparatus. This design was patented by Bell on January 30, 1877.
Uploaded
July 7th, 2014
Statistics
Viewed 1,580 Times - Last Visitor from Wilmington, DE on 04/22/2024 at 10:04 AM
Embed
Share
Sales Sheet
Comments
There are no comments for Bells Telephone, 1877. Click here to post the first comment.