Patent ID: 6236526
Filing Date: 2001-05-22
Classification: G11B

Abstract:
A sealed audio cassette player for playing a single cassette permanently installed in said player which comprises:an audio cassette including a cassette case and an audio information signal bearing tape entrained between a feed spindle and a take up spindle;drive motor means for rotating said take up spindle for feeding said tape from said feed spindle to said take up spindle;frequency indicia on one of said tape, feed spindle and take up spindle for indicating tape speed;a detection means for detecting said indicia and varying rotational speed of said drive motor means to maintain said tape linear speed substantially constant at a predetermined linear speed of less than about 0.5 inch per second;a playback head in operative engagement with said tape between said spindles for detecting an audio signal;a speaker for generating sound in response to said audio signal as detected by said playback head;battery means for powering all components;microprocessor means for controlling operation of said cassette player;a closed housing surrounding all components and sealed against entry of outside agents.