Dual Gebruder Steidinger

Dual Gebruder Steidenger

Werner Broghammer

Helmut Laufer

Jurgen Kramer

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.

Switching device for cassette tape recorders

A cassette tape recorder for use with a cassette which has at least one opening on its wide side, through which opening, upon the insertion of the cassette into the device, there can be inserted at least one winding mandrel for engagement in the core of the tape spool, the cassette having at least one opening in one of its narrow sides, in which last mentioned opening, after the setting of the cassette on the winding mandrel by means of a feed device (which feed device can be transferred against the action of a spring into the operating position by means of a first control element and which feed device is again releasable out of this operating position by means of a second control element), the magnetic head is insertable in a direction perpendicular to the axis of the winding mandrel for the purpose of recording or playback, and which contains means which prevent a mechanical stressing of the magnetic head if with an inserted magnetic head, attempt is made to take the cassette from the device. The control element for release of the feed device for the magnetic head is moveable in the direction of the grabbing movement of the hand for the inserted cassette and is arranged bordering directly contiguous to the cassette in a manner such that the cassette can only be grabbed after the control element has been moved.

A magnetic tape recorder for recording as well as for playback of sound, having a noise suppression device, and sensor member with an abutment surface for engaging against an unopened break through tab of a tape cassette for causing a locking mode for the recording device to be inoperative. The sensor member has an additional abutment surface arranged such that the latter abutment surface senses the wall of the cassette outside of the broken-through penetration opening of the cassette and the insert movement of the sensor member is limited in the opened penetration opening. The sensor member is connected with the locking device; such that in the absence of the limitation due to the absence of a cassette, the locking device, is also inoperative.

Growing community of inventors

Tennenbronn, Germany

Werner Broghammer