. Electrical world. section in Fig. i. It will be noted that the microphone part isnot in the usual position with reference to the diaphragm of the re-ceiving part, but is located with its electrodes in a plane perpendicularto that of the diaphragm. The diaphragm is not rigidly secured, butlies upon the lop of a hard rubber annulus. Projecting from thisannulus in a downward direction, at opposite extremities of a di-ameter, are two lugs of sheet metal. The left-hand one, as shown inthe cut, is secured to the frame of the instrument by screws passingthrough its lower end, while the right-hand o
. Electrical world. section in Fig. i. It will be noted that the microphone part isnot in the usual position with reference to the diaphragm of the re-ceiving part, but is located with its electrodes in a plane perpendicularto that of the diaphragm. The diaphragm is not rigidly secured, butlies upon the lop of a hard rubber annulus. Projecting from thisannulus in a downward direction, at opposite extremities of a di-ameter, are two lugs of sheet metal. The left-hand one, as shown inthe cut, is secured to the frame of the instrument by screws passingthrough its lower end, while the right-hand one is secured directlyto the movable electrode of the transmitting button. The diaphragmis, of course, capable of taking two sorts of motion—a vibration con-fined to itself and a swinging motion about the hinging lug. It is the idea of the inventor that this latter motion will producean effect upon the transmitter far in excess of anything which couldbe produced by direct action of the diaphragm. However, the bulk. FIG. I.—LEVENBERG TELEPHONE REPE.^TER. of the moving parts will surely introduce a sluggishness of actionquite fatal to the quality of the repeated tone. NEW RELAYS. Mr. H. P. Claussen, of Chicago, has produced a new relay for tele-phone signal work which embodies most novel means for preventingsticking of the armature due to incipient welding of the contact toits anvil. Considerable trouble is at times experienced from this cause,especially where a condenser of a high capacity line or apparatus isin the controlled circuit. The new relay in question is of the double-bobbin type, much in appearance like an ordinary telegraph relay ofwhich the plane of the coils has been turned parallel to that of thedirection of armature swing. The usual adjustable screw stop andadjustable contact screw of this telegraph relay are provided, sup-ported from a frame to which the bobbins are secured. Upon therear of the armature is secured a slip spring riveted near the middleof the
Size: 1276px × 1958px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
