A fellow in a bar notices a woman, always alone, come in on a fairly regular basis. After the second week, he made his move.
"No thank you." she said politely. "This may sound rather odd in this day and age, but I'm keeping myself pure until I meet the man I love."
"That must be rather difficult." the man replied.
"Oh, I don't mind too much." she said. "But, it has my husband pretty upset."
Edison patentIn 1907, Thomas A. Edison was issued a patent for a "Diaphragm for Talking-Machines" (U.S. No. 855,562) that "will be readily responsive to vibrations of comparatively great amplitude." The invention comprised a duplex diaphragm made of at least two disks, each of which is radially sloted so that each disk constitutes a series of reeds. By staggering the slots of the disks, a continuous surface is presented for actuating the sound waves. The disks, made of mica about one-thousandth of an inch thick, are cemented together with an elastic cement, such as a solution of gum rubber. |
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