Circuit for generating an audible signal in tape recorders at the tape end
AssigneeGrundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig
InventorHans-Georg Rimkus
Life of this patent
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Abstract
A circuit for generating an audible signal in a tape recorder as the tape approaches its end. The circuit includes an open loop extending between the recording amplifier and loudspeaker. The loop is closed by the metallic foil at the end of the tape when the foil bridges a pair of contacts. In the case where an exterior microphone is used with the recorder the speaker signal is electrically fed back to the amplifier.
Claims2
In a magnetic tape recorder having a microphone, recording amplifier and loudspeaker, an audible tape end signal generating circuit for use with a magnetic tape having a foil coating at the end thereof, the improvement comprising:
- a pair of contacts adapted to be bridged by said foil coating, said contacts when bridged completing a first loop connecting the loudspeaker directly to the output of said amplifier and simultaneously completing a second loop connecting the output of said amplifier to the microphone output, neither of the loops defining an acoustic path for said end of tape signal and said end of tape signal is generated by said amplifier oscillating so that the microphone is not an essential constituent of said audible end of tape signal generating circuit.
Dependencies are inferred from the claim text.