Musical-output adapter for telephones

Claim 1

A musical-output adapter for telephones to be used in place of a ringing bell or in conjunction therewith, comprising: a first electronic circuit adapted to be operably coupled to the incoming signal of a telephone line, said first electronic circuit including: means to convert alternating current into direct current coming from said incoming signal, an opto-coupler connected to said means to convert alternating current into direct current, whereby direct current is fed to said opto-coupler, a timing circuit connected to said opto-coupler from which current is passed to activate said timing circuit, a timing relay connected to said timing circuit, said timing relay being actuated by said timing circuit; and a second electronic circuit defining a music circuit connected to said timing relay, said music circuit being activated when said timing relay is closed; a DC power supply coupled to said timing relay to allow DC voltage to continuously activate said music circuit when said relay is closed; a speaker means connected to said music circuit, whereby music is received from said music circuit when said music circuit is activated; and a drop-out-relay circuit connected and responsive to said incoming signal of said telephone line to activate said drop-out-relay circuit so as to provide a normally closed mode, said drop-out relay circuit being further interconnected between said timing circuit and said timing relay, whereby said music circuit is controlled.