Loud speaker for telephone

Claim 1

A loud-speaker device for use with a telephone comprising a case of non-magnetic material, said case having an axis and two opposite ends extending transverse to said axis so that the case can be rested on either of said ends on a supporting surface in proximity to a telephone receiver which is also rested on said supporting surface, said axis being vertical whichever of said ends is rested on the supporting surface, said case containing a pick-up coil for receiving electromagnetic energy from voice frequency current of the telephone, means for amplifying voice frequency current generated in the coil from said energy, a speaker for transducing the output of said amplifier to audible sound, a source of electrical power connected to the amplifier for making the amplifier operational and a switch included in a connection from the power source to the amplifier for turning the power to the amplifier on or off, said switch being a gravity operated switch which activates the amplifier when the case is rested on one end and deactivates the amplifier when the case is rested on the other end, and in which said speaker is at an end of the case and a cover closes said end, and means on the exterior of said cover for indicating the position of the pick-up coil within the case.