The watermark in the lower right corner of the image will not appear on the final print.
Frame
Top Mat
Bottom Mat
Dimensions
Image:
8.00" x 6.50"
Mat Border:
2.00"
Frame Width:
0.88"
Overall:
13.50" x 12.00"
Bells Telephone System, 1877 Framed Print
by Science Source
Product Details
Bells Telephone System, 1877 framed print by Science Source. Bring your print to life with hundreds of different frame and mat combinations. Our framed prints are assembled, packaged, and shipped by our expert framing staff and delivered "ready to hang" with pre-attached hanging wire, mounting hooks, and nails.
Design Details
Diagram of Bell's telephone system that appeared in the Illustrated London News, 1877. Alexander Graham Bell is commonly credited as the inventor of... more
Ships Within
3 - 4 business days
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Artist's Description
Diagram of Bell's telephone system that appeared in the Illustrated London News, 1877. 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 3...
$104.00
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