Abstract: The objective lens of a scanning device is mounted in a movable section which is interconnected to a mounting section by two supports which extend parallel to each other and the lens axis and transverse to a direction of movement for correcting tracking errors. Each support has two first members, one movable and one fixed, having central portions fixed to the movable and mounting sections respectively, and two stiff second members connecting respective ends of the first members. Between the central portions and the ends, the first members are elastically deflectable to correct focussing errors, and elastically twistable to correct tracking errors.

Abstract: Loading device for an apparatus for recording and/or reproducing signals, and apparatus provided with the loading device. The loading device (1) comprises a movable drawer (19) by means of which the record carrier (15) is movable into and out of the housing (3) of the apparatus through an opening in a wall of this housing (3). Guide means (22, 23, 24) are provided for guiding the movement of the drawer (19) relative to the housing (3) and comprise guide elements (23) which are guided in guideways (22), which guide means guide the drawer (19) in guiding directions (26, 27) which enclose an angle with each other.

Abstract: The invention relates to an electro-optical device, comprising a frame (1), a movable holder (5) in which an objective (7) having an optical axis (9) is secured, bearing pin (25) fixed to the holder (5) and bearings (27, 29) fixed relative to the frame (1) supporting the holder so that it can be translated and rotated, a magnet (13) secured to the frame and cylindrical wall portions (1B) which wall portions with the magnet form an annular air gap (17) with a radial magnetic field. A focussing coil (19) is secured to the holder and is movable in the air gap, and a plurality of tracking coils (33) are secured to the holder and are situated on the outer side of the focussing coil. The tracking coils extend through recesses (37) between the cylindrical wall portions of the frame, the turns of the tracking coils being situated in or substantially in radial planes containing the axis of rotation (11) of the holder and the turns of each of the tracking coils together forming a continuous free space (35).

Abstract: A magnetic-tape apparatus comprises at least one switching device comprising a servo wheel (77; 97) for switching an apparatus function. Further, the apparatus comprises two winding spindles (2, 3) whose lower end portions are each connected to a coaxial winding wheel (4, 5). A reversible drive motor (22), which can be operated at a high and a low torque level, is coupled to the respective winding wheel (4, 5) via a pivotable idler (27) mounted between the winding wheels (4, 5) after the idler has been pivoted to an operating position of the apparatus. In a switching position of the apparatus, the motor (72) is coupled to a coupling device (22). In the switching position of the apparatus this coupling wheel establishes a coupling between the motor (22) and the switching device (77; 97), so that this device is actuated to switch the apparatus function. The motor (22) can actuate the switching device (77; 97) only when it operates at the higher torque level.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.