Today is National Weed Appreciation Day in USA! Appreciate your Weed!
Why did the dandelion become a motivational speaker?
Because it wanted to teach everyone how to turn their weeds into wishes!
Why was the clover invited to the garden party?
Because it was a popu-lawn guest!
Electric motorIn 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.« |
