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Zbyněk Kapoun

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Edison patent

In 1882, Thomas A. Edison was issued a patent for an improvement to the telephone (No. 252,442). It described a carbon microphone. Finely divided conducting material, such as carbon, between metal cups mounted on arms is attached to the mouthpiece diaphragm. As sound waves directed through the mouthpiece move the diaphragm, the arms change the pressure on the carbon button which in turn varies an electric current passing through the carbon button. Changes in the current correspond to the pitch and amplitude of the sound. One arm conducts the electrical current to the carbon button, and the the other from it.

Guilty Conscience

An elderly Italian Jew wanted to unburden his guilty conscience by talking to his Rabbi. "Rabbi, during World War II, when the Germans entered Italy, I pretended to be a Catholic and changed my name from Levy to Spumoni, and I am alive today because of it."
"Self preservation is allowable, and the fact that you never forgot that you were a Jew is admirable," said the Rabbi."Rabbi, during the war, a beautiful Jewish woman knocked on my door and asked me to hide her from the Germans. I hid her in my attic, and they never found her."
"That was a wonderful thing you did, and you have no need to feel guilty."
"It's worse, Rabbi. I was weak and told her she must repay me with sexual favors, which she did, repeatedly."
"You were both in great danger and would have suffered terribly if the Germans had found her. There is a favorable balance between good and evil, and you will be judged kindly. Give up your feelings of guilt."
"Thank you, Rabbi. That's a great load off my mind. But I have one more question."
"And what is that?"
"Should I tell her the war is over?"
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