. Electrical world. FIG. 4.—PERCE.\T.\GE DIVISION. cord can connect two telephones only when it is put into position byan operator, while the percentage division, actuated through thesectional division, takes a position automatically that connects thecalling and called telephones. Just as in a manual exchange it isonly necessary to have enough connecting cords for the percentageof all the telephones that will be in use at any one time, so in°aLorimer automatic exchange it is only necessary to have a corre-sponding percentage of the so-called percentage divisions. Were it FIG. 5. — BRUSH FOR CV
. Electrical world. FIG. 4.—PERCE.\T.\GE DIVISION. cord can connect two telephones only when it is put into position byan operator, while the percentage division, actuated through thesectional division, takes a position automatically that connects thecalling and called telephones. Just as in a manual exchange it isonly necessary to have enough connecting cords for the percentageof all the telephones that will be in use at any one time, so in°aLorimer automatic exchange it is only necessary to have a corre-sponding percentage of the so-called percentage divisions. Were it FIG. 5. — BRUSH FOR SWITGH, on the decimal indicator are normally in motion, but the other auto-matic apparatus moves only in response to a call, and then comesto rest. The contact surfaces thus wear only in proportion to thenumber of calls. The contacts between these German silver brushesand strips are included in the talking circuit between two connectedtelephones, and form the greater part of the wearing surfaces in the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
