Show Deaf Persons itt Using Phone Phon A device which will enable totally tg- tg tally deaf persons to use the telephone telephone telephone tele tele- phone has been developed by a aBell aBell aBell Bell System Telephone Company employee Named It was developed developed deve deve- loped by New York Telephone Company engineer Ralph R. R R Sera Sera- finn tinn and allows the user to re receive receive re- re elve telephone messages through the sense of ot sight or touch The S unit designed for lor deaf deat who mho cannot see al allows allows allows al- al lows an individual to receive a message by feeling vibrations through a magnetically controlled button attached to his telephone one A code can an be worked out using the timing and length of ot vibration I The doing the calling i can transmit signals ty by humming whistling or tapping on the mouth mouthpiece I pece piece of hi his telephone A lamp which converts sound I into Tinto long and short short- n flashes of f flight light is the basis of at the call unit constructed for tor p persons persons who can see but cannot hear hal |