U.S. Philips Corporation

Ghislanus M Aldenhoven

Johannes J Schoenmakers

Gilbert E Mestdagh

The head-mounting plate of a cassette apparatus is positioned, in part, through the operation of a servo having a motor-driven servo wheel whose rotation is initiated by pulsed operation of an impulse relay. The servo wheel has teeth around its circumference except for two portions defining wheel rest positions. In the rest position of the wheel, a starting torque is applied by pressure on a cam on the wheel, rotation being prevented by a latching arrangement. The impulse relay is engaged by a relay-armature member which has an elastically deflectable arm and a rigid arm, the end of the elastically deflectable arm having a rigid support for a soft iron element which can be attracted to the impulse relay, and a coupling element which couples the elastically deflectable arm to the rigid arm, so that movement of the rigid arm in one direct is prevented by the engagement with the relay. Deflection of the deflectable arm permits movement of the relay-armature member through an additional pivotal movement toward the latching relay. In the latching position of the relay-armature member, a stop on the member abuts a latching projection on the servo wheel to keep the wheel in a latched position. An impulse energization of the impulse relay releases the soft iron element, and a spring pivots the relay-armature member to an inoperative position in which the servo wheel is freed to rotate under the influence of the starting torque, so that the circumferential teeth mesh with a drive pinion connected to a drive motor which may be constantly rotating. A reset projection on the relay-armature member is actuated by the latching projection for pivoting the member back to the latching position so that the latching projection can abut the stop when the servo wheel has again reached the rest position.

Servo with impulse relay for a magnetic-tape-cassette apparatus

A mechanism for providing actuating force on a switch responsive to changes in operation of a drive motor and the position of the head-mounting plate. An axially displaceable coupling wheel engages a guideway surface on the head-mounting plate, for movement axially between a position in which the coupling wheel engages an idler gear which is used to provide fast forward and fast reverse driving, and a position in which the coupling wheel is disengaged from the idler. The coupling wheel drives a servo wheel which is limited to one direction of rotation by a pawl, and is connected to a recording switch by an actuating link.

Mechanism for actuating the recording switch of a magnetic-tape apparatus

A disc-record player comprises a pressure member for pressing a record disc (5) against a turntable (1) which carries a mandrel at the upper side, the mandrel being coaxial with the turntable and being engageable with the center hole of the record disc (5). The pressure member comprises spring means formed by turns (12a) of a toroidal coil compression spring (12) which is accommodated in a annular space (11) in the mandrel, which space is open at the circumference of the mandrel. The turns are clear of the mandrel at the side facing the turntable axis (1a). The spring turns (12a) are movable under spring force radially relative to the turntable axis (1a); they project from the circumference of the mandrel and press the disc against the turntable.

Disc-record player comprising a pressure member for pressing a record

A storage case and holder combination has an ejection spring which urges an inserted holder outward. The holder is retained by a resilient latching arm having a pin which engages in a latching groove that deflects the pin in two orthogonal directions during insertion and latching. To keep the pin from resiliently moving out of the groove in response to a pull on the holder, a stop on the storage case prevents movement of the pin in the undesired direction while the holder is in the latched position. The latching arm and ejection spring are formed as a unitary molding with a cover portion which attaches to, and preferably forms part of, the rear wall of the case when shaped into position.

Latching storage case for a holder containing an information carrier

A holder for a rigid information disc comprises a rectangular frame which includes a first disc-supporting section near a first peripheral side of the frame and a second disc-supporting section adjoining a second peripheral side located opposite the first side. The frame carries movable clamping means for clamping the information disc onto the frame. The frame is at least in part resiliently deflectable and is capable of returning from a deflected position to a flat position. The first and the second disc-supporting sections are interconnected by at least one resilient connecting element which permits deflection of the frame into the deflected position in which position the first and the second peripheral sides extend at least substantially parallel to each other. The clamping means can be actuated; the clamping means are situated near the connecting elements and in the deflected position of the frame do not release the information disc until these means have been actuated.

Holder for a rigid information disc and loading-system comprising a

A tape recorder or player having a central drive wheel and pivotable fast mode and normal mode idler arms. A switching lever pivots from a rest position to a first operative position to permit central drive wheel rotation to swing the fast mode idler against either reel drive spindle, or to a second operative position to enable normal mode idler operation. The head slide is also coupled to the lever in the operating position, and a control device limits lever movement to the first position for fast mode use.

Mode-switching linkage for a tape cassette apparatus

An actuating mechanism which responds to the stoppage of rotation of a component, and a tape recorder inculuding such a mechanism. During apparatus operration a reciprocating movement is imparted to a lever. Rotation of the component causes a frictionally coupled actuating element to press at least one cam against the lever with a biasing torque, the reciprocating movement causing the lever to slide along the cam. The lever also slides along a guide element so as to define a path of lever actuating portion movement. Upon stopping of the component rotation, the biasing torque is removed, and the lever pivots to follow a second path of actuating portion movement defined by the guide element. A tape recorder includes such a mechanism with an actuating element that provides a same torque to the lever for either direction of component rotation, and quickly unlatches control buttons if the component rotation stops.

Mechanism responsive to rotation stoppage, and tape recorder with such

A cassette player or recorder having a device for adjusting the azimuth angle of a read head during playback. An azimuth angle adjusting member is controlled by two pulling strings for moving the member in opposite directions, the strings being separately tensioned, and being moved by a correction knob on the front panel of the apparatus.

Azimuth angle adjusting device for a tape player

An automatic stop or change-over mechanism for tape recorder or other article moving apparatus. After the article has stopped at the sensing location the drive means can be switched off or changed over automatically by movement of a zero member which is part of a differential mechanism having a unidirectional slip coupling. The slip coupling only transmits a force to the zero member after the article has stopped.

Automatic stop mechanism

A tape recorder, in particular a cassette recorder, with an automatic stop device, which during stoppage of the tape switches off the apparatus and releases the play button. During tape stoppage a rotatably journalled drive wheel is brought into contact with the flywheel with its circumference, after which said flywheel drives a force-transmitting member, preferably via a reduction gear, and the latching slide is released.

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Eindhoven, Netherlands

Ghislanus M Aldenhoven