Patent ID: 7587178

Claim:
A signaling device having a plurality of compatible signal element housings wherein the improvement comprises: a first sequentially interchangeable signal element module housing ( 7 ) with ends electrically and mechanically exchangeable with a second sequentially interchangeable signal element module housing, said first sequentially interchangeable signal module housing ( 7 ) having a transmitting unit ( 8 ) and/or a receiving unit providing a wireless transfer of data; a second sequentially interchangeable signal element module housing ( 2 , 3 , 4 ) having ends electrically and mechanically compatible with said first sequentially interchangeable signal element module housing, said second sequentially interchangeable signal element module having a signal element disposed therein wherein said signal element module is selected from the group consisting of: (a) an optical signal element; (b) an acoustic signal element; and (c) an acoustic signal element with an optical signal element; and a receiver wherein the receiver is a land line telephone, a mobile telephone, a radio device and/or an internet link.