Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1979-06-22
1981-02-10
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360105, 360 965, G11B 2102, G11B 2122, G11B 1518
Patent
active
042505275
ABSTRACT:
A switching device for a cassette tape recorder with which the magnetic head, by means of a feed device which is actuatable by a solenoid, is introducable into an opening of the cassette and is again removeable by means of a spring, whereby in the circuit of the solenoid there are disposed in series a first and a second electronic switch and a mechanically controlled first contact pair, and the first electronic switch is controlled by the service control elements for the tape transport (recording/playback or stop), the second electronic switch being controlled by a photoelectric device which is disposed in the region of grabbing of the fingers upon insertion or removal of the cassette and interrupts the circuit of the solenoid as long as the light beam is interrupted by the fingers and the first contact pair is controlled by a sensing pin which projects into the reception area of the cassette and interrupts the circuit of the solenoid as long as no cassette is located in the device, so that the magnetic head automatically is brought into its position of being pulled back from the cassette when the grabbing by the hand takes place and the magnetic head remains in this position when no cassette is located in the operative position, so that the magnetic head never can come into contact with the cassette housing.
REFERENCES:
patent: 3747941 (1973-07-01), Van Der Lely
patent: 4021855 (1977-05-01), Czonka et al.
patent: 4024580 (1977-05-01), Ban et al.
Dual Gebruder Steidinger
Eddleman Alfred H.
Farber Martin A.
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