(Mo Model.) 



4 Sbeeti — Sheet 4 



C. A. BELL & S. TAINTER. 



BEOORDINO AND REPRODUCINO SPEECH AND OTHER SOUNDS, 



No. 341,214. Patented May 4, 1886. 



Figure 4. — P.^tent Drawings 

 from U. S. paienl 341214, 

 ijranted May 4. 1886, to 

 CMiichester Bell and C. S. 

 Tainter. 





^n 7^rt fanty 



.^/^ 



7 ^^m. 



<. 



when the box was opened in 1937, "That is just the 

 sort of thing father would have said. He was always 

 quoting from the classics." 



The method of reproduction used on the machine. 

 however, is even more interesting than the quotation. 

 Rather than a stylus and diaphragm, a jet of air 

 under high pressure was used. 



•'This evening about 7 P. M.," Tainter noted on 

 July 7. 1881, "The apparatus being ready the valve 

 upon the top of the air cylinder was opened slighdy 

 until a pressure of about 100 lbs. was indicated by 

 the gage. The phonograph cylinder was then rotated, 

 and the sounds produced by the escaping air could 

 be heard, and the words understood a distance of at 



74 



BULLETIN 218: CONTRIBUTIONS KRO.M THE .ML SLU.M Ul III.STORV .\ND lEtJIINOLOOY 



