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Usman Qamar

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Electric motor

In 1904, the first direct current, interpole, electric motor to be patented in the U.S. was issued to Mathias Pfatischer of Phildadelphia, Pennsylvania under the title "Variable Speed Motor" (No.775,310). His improvement was to "effect commutation without sparking, with a variable load as well as at variable speed and which is capable of rotation in either direction." The new design added auxiliary-field pole-pieces which were small as compared to the main pole-pieces.«

It was dinner time on a Britis...

It was dinner time on a British Airways flight from London to New York. As the flight attendant moved down the plane, she asked one of the passengers:
- “Would you like dinner?”
- “What are my choices?” asked the passenger.
- “Yes or No,” replied the attendant.
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