The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 382
straps takes the place of one of theordinary straps. Sourdines or Deafeners.—Complaint is often made of thenoise caused by the vibration or humming of wires attachedto a building. A very simple method of preventing this isto bind a strip of lead about 27 inches long, J inch thickand J inch wide,… … -Eaves Bracket and SpurInsulator 354 PRACTICAL TELEPHONE HANDBOOK coils of from 20 to 40 lbs. in weight; 100-lb. copper wirein coils of from 50 to 125 lbs., and 18 inches in diameter.Tt should not be directly unwound from the coils, or itwould be apt to get into kinks and twists. A kind of…
Telephone
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