. American telephone practice . FIG. COLVIN TRANSMITTER. this stud in this bushing the adjustment of the transmitter electrodesmay be effected. A machine screw, K, passing through a washeras shown, serves to engage a tapped hole in the end of the stud, F,and thus bind the latter in place in the rubber bushing, /. This transmitter has been put into use by customers of theStromberg-Carlson Company to a very large extent and it has givenuniformly good service, having proved to be thoroughly reliable,and remarkably free from the troubles which often beset granularcarbon transmitters. In Fi
. American telephone practice . FIG. COLVIN TRANSMITTER. this stud in this bushing the adjustment of the transmitter electrodesmay be effected. A machine screw, K, passing through a washeras shown, serves to engage a tapped hole in the end of the stud, F,and thus bind the latter in place in the rubber bushing, /. This transmitter has been put into use by customers of theStromberg-Carlson Company to a very large extent and it has givenuniformly good service, having proved to be thoroughly reliable,and remarkably free from the troubles which often beset granularcarbon transmitters. In Fig. 51 is shown a transmitter designed by Mr. F. R. Colvinwhich is unique in its mode of action. This was at one time putinto quite extensive commercial use by Mr. Colvin, but it is notnow used. 68 AMERICAN TELEPHONE PRACTICE. The shell is formed of two pieces, A and B, of wood, the formercarrying the mouthpiece. The space in which the diaphragm fitsis made large enough to hold the diaphragm very loosely so that itmay vibrate wi
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Keywords: ., boo, bookcentury1900, bookdecade1900, bookidamericantelepho00mill
