Electro-Magnetic Machine. 



Claim of Thomas Davenport. 



In the words of the patent, taken out, this invention "consists in 

 applying magnetic and electro-magnetic power as a moving principle 

 for machinery, in the manner described, or in any other substantially 

 the same in principle." 



"Mr. Davenport first saw a galvanic magnet in December, 1833, 

 and from the wonderful effects produced by suspending a magnet of 

 150 lbs. from a small galvanic battery, he immediately inferred, 

 without any knowledge of the theory or the experiments of others, 

 that he could propel machinery by galvanic magnetism. He pur- 

 chased the magnet and produced his first rotary motion in July, 1834. 

 In July, 1835, he submitted his machine to Prof. Henry, of Prince- 

 ton, New Jersey, also without any knowledge of Prof. Henry's ex- 

 periments in producing a vibratory motion. From this gentleman he 

 received a certificate, testifying to the originality and importance of 

 the invention." 



Mr. Davenport is, by occupation, a blacksmith, with only a com- 

 mon education, but with uncommon intelligence ; his age about thirty 

 five. Mr. Ransom Cook, of Saratoga Springs, is associated with 

 Mr. Davenport, and has rendered essential service by the improve- 

 ments he has made in the machine, and by his assistance in bringing 

 the subject before the public in the most effectual way. Arrange- 

 ments have been made to take out the patent in Europe. 



P. S. The proprietors are constructing a machine of seven inches 

 in diameter, and also one of two feet in diameter. Galvanic mag- 

 nets will be used as the moving and stationary magnets of each. 



