Tape end warning apparatus
AssigneeOlympus Optical Co., Ltd.
InventorsKen Satoh, Tuneo Yanagida
Life of this patent
Estimating the term…
Abstract
A tape end warning apparatus comprises an alarm switch which is closed in response to the detection of a terminal end of a running tape being reached during a record or playback operation of a tape recorder, and an oscillator circuit which is activated by the closure of the switch. The oscillator circuit produces an alarm signal which is fed to an amplifier inherently contained in a tape recorder so as to give off an audible alarm through a loudspeaker which is connected with the amplifier.
Claims8
A tape end warning apparatus for use in a tape recorder of the type which includes an audio amplifier, a loud speaker, a first switch for connecting an output of said amplifier to said loudspeaker when said tape recorder is in a playback mode and for disconnecting said output of said amplifier to said loudspeaker when said tape recorder is in a record mode, a tape cassette receiving chamber, a drive shaft extending into said receiving chamber and adapted to engage a drive shaft recess in a tape cassette when a tape cassette is placed within said receiving chamber, and drive means for driving said drive shaft, said tape end warning apparatus comprising:
- a feedback circuit, including a normally open switch, forming an electrical feedback path between said output and an input of said amplifier when said normally open switch is closed;
- an end tape detecting means for closing said normally open switch when an end of tape condition is detected, said end of tape detecting means including:
- (1) a lever which is pivotable about a predetermined axis, said lever rotatably supporting said drive shaft at a point spaced from said axis, said lever adapted to pivot when the tension of a tape carried by a cassette placed in said receiving chamber increases due to an end of tape condition;
- and
- (2) said lever adapted to close said normally open switch when said lever is rotated due to said end of tape condition whereby said feedback circuit connects the output of said amplifier to the input of said amplifier and said loudspeaker generates an audible alarm signal.
A tape end warning apparatus for use in a tape recorder of the type which includes an audio amplifier and a first switch for connecting an output of said amplifier to said loudspeaker when said tape recorder is in a playback mode and for disconnecting said output of said amplifier to said loudspeaker when said tape recorder is in a record mode, said tape end warning apparatus comprising:
- a feedback circuit, including a normally open switch, forming an electrical feedback path between said output and an input of said amplifier when said normally open switch is closed;
- and
- an end of tape detecting means for closing said normally open switch when an end of tape condition is detected.
A tape end warning apparatus for use in a tape recorder, comprising an alarm switch adapted to be closed when a running tape reaches its terminal end, and a switching transistor adapted to be forward biased into conduction upon closure of the switch for connecting a loudspeaker across the output of an amplifier contained in the tape recorder and for forming a electrical feedback path across the output and input of the amplifier to drive it into oscillation, thereby enabling an oscillation output to be given off by the loudspeaker as an audible alarm when the running tape reaches its terminal end.
Dependencies are inferred from the claim text.