Abstract: The magnetic tape guiding cylinder device includes a rotatable upper cylinder; a fixed lower cylinder opposed to the upper cylinder and having a cylindrical member integrally formed with and penetrating through a bottom plate at one end of the lower cylinder which is remoter from the upper cylinder, the cylindrical member being provided with bearings at both axial end portions; a drive shaft rotatably supported by the lower cylinder via the bearings to drive the upper cylinder, the cylindrical member being grasped by a chuck during finishing operation of the lower cylinder. The device is particularly characterized in that the cylindrical member is formed with a circular groove along the outer circumference between the bottom plate and one of the axial end portions which is remoter from the upper cylinder.

Abstract: An automatic focusing camera is operated between daylight and flash modes automatically responsively to ambient light photosensings. The lens is operable between a near-focus setting and a far-focus setting, taking the far-focus setting automatically in the daylight mode. In flash mode the aperture is automatically set to its maximum value, whereas in daylight mode the aperture is automatically set to one of at least two reduced aperture settings. The largest aperture setting in daylight mode is the hyperfocal aperture setting corresponding to the far-focus lens setting. A further reduction in aperture below the hyperfocal value is governed by a filmspeed entry system and ambient light sensings. The changeover threshold between daylight and flash mode is also governed by the filmspeed entry system.

Abstract: A control circuit in an FM radio receiver includes a current mirror circuit which extracts a ripple component caused by a multipath disturbance and superposed on an S-meter output voltage from an intermediate frequency amplifier/detector of the FM radio receiver, and decreases the S-meter output voltage in response to the degree of the ripple component to use the decreased S-meter output voltage as a control voltage for control of separation and high-cut operations of a stereo demodulating stage of the FM radio receiver.

Abstract: A color converter circuit particularly suited for use with computer-steered multi-color display units accepts at its input terminals a plurality of color commands from the associated computer or other signal source, and includes manual selection means for selecting a corresponding plurality of different output color commands to be actuated selectively upon response of each different input color command to provide manual control of the colors of the generated pattern, without requiring software modification. Associated indicator lights adjacent each of the color-selecting switches indicate which colors in the form of color commands are being sent from the computer. A simplified version of the converter accepts monochrome commands capable of giving only dark and bright commands from the computer, and selectively provides optionally chosen different color commands to the display unit to correspond to each of the two input signal conditions.

Abstract: The high current interrupting fuse of the invention includes an envelope free of sand or similar arc quenching material. The envelope preferably has terminal end caps enclosing the ends of the envelope between which caps a fuse element extends. The envelope has an arc-quenching gas-releasing material at least at the inner surface of the envelope. Arc barrier plugs made of an ablative material surround each end of the fuse element which for ease of assembly freely pass through bores of plugs. The fuse element also preferably passes through metal plates externally of the plugs and adjacent to the end caps.

Abstract: A sub-miniature power amplifier for hearing aids configured to be completely self-contained and to fit within the user's ear features a Class D amplifier stage providing a peak-to-peak output voltage greater than the power supply voltage. By configuring all signal elements as digital units, circuit balance is readily maintained. A substantial economy of battery drain is achieved while preserving a low value of distortion at low signal levels. Oscillator frequency is governed by a single resistance element. The amplifier and an optional efficiency-improving inductor can be accommodated entirely within the residual volume of the motor chamber of a state-of-the-art earphone housing. Pulse feedback networks are provided to achieve positive stable latching of each output pulse throughout its duration without producing significant pulse duration distortions.

Abstract: A delayed shutter actuation system for cameras providing from pre-flash or ambient light sensings automatic focusing control, automatic aperture control, or both, features a spring-energized shutter slide member coupled to a velocity limiter over an initial portion of the release stroke. A spring-driven focus control member, or a spring-driven exposure control member, or both, are coupled through movable regulator members to the shutter slide through lost motion couplings so that their respective movement rates are governed by the velocity limiter until they are locked in proper position by electrically controlled locks controlled responsively to such sensings. During a terminal portion of the motion of the shutter slide the velocity limiter automatically disengages to allow an unimpeded motion of the slide to actuate the shutter.

Abstract: A signal transmission control apparatus connected between a telephone line and a terminal device controls signal transmission therebetween in no-ringing service. First DC and AC circuits of the apparatus become conductive in response to a DC control voltage from the telephone line. The first DC and AC circuits are connected to the telephone lines and the leads of a primary coil of the transformer of the apparatus. The secondary coil of the transformer is connected to the terminal device and an amplifier and first detection device of the apparatus. A subsequent AC calling signal from the telephone line, received on the first AC circuit, effects conduction in second DC and AC circuits through serial operation of the first detection circuit, a control circuit, a switching transistor and closure of relay contacts.

Abstract: A camera shutter cocking system employs a specially configured cam driven synchronously with a film-engaging sprocket to actuate a shutter cocking lever from a released to a shutter cocking condition by means of a cam follower mounted on the cocking lever. The cam preferably has two lobes, each configured to maintain the shutter cocking load on an electric motor drive system generally constant throughout substantially the entire film advancing operation. Excessive terminal overspeed of the motor drive system is thereby suppressed. A one-way clutch between the cam and the sprocket disengages the shutter cocking system from the motor drive during rewind and traps the cocking lever in a released position, thus preventing multiple double exposure of the film if the shutter release button is accidentally held down by the user during this operation.

Abstract: A tape player is disclosed, whereby mode plates of the fast forward side and of the reverse side, each having an exclusive driving system and a head plate coupled at least with one of the mode plates and making a forward movement are provided; two electromagnetic plungers are disposed, each of which locks each of the mode plates at a position corresponding to the advanced position of the head plate; a joint plate is disposed rotatably with respect to each of the mode plate; with this joint plate is linked a fast forward and reverse drive plate moving from the central play position toward the left and right fast forward and reverse positions depending on the direction of the rotation of the joint plate; and on said head plate is disposed an engaging part with which a part of the fast forward and reverse plate is engaged, when the fast forward and reverse plate is in the central play position and the head plate advances.

Abstract: A loading and ejection mechanism includes an inversion gear rotated by a motor in the opposite directions, an eject plate having a rack engageable with the inversion gear, and a mechanism to bring the rack into engagement with the inversion gear, so that the eject plate is moved back and forth by rotation of the inversion gear during loading and ejection so as to move a pack guide up and down and move an eject arm back and forth.

Abstract: An automotive blade-type fuse has an enlarged transparent extraction flange. The flange is configured as a thin-wall structure having a cavity therein running substantially its entire length. The fuse terminal blades are captively secured in a housing to extend from the bottom thereof and have narrow extensions at the outer edges of the blades which extend upwardly into the flange cavity. A fuse link extends between the blade extensions within the cavity and at a stand-off distance from the interior walls of the cavity. The fuse housing is preferably of identical half-shell construction having lengthwise-running centering ribs and associated mating recesses to facilitate assembly.

Abstract: A plug-in fuse assembly comprises a housing made of insulating material and having relatively closely spaced vertical side walls bridges by vertical end walls and a metal plug-in fuse element having laterally spaced, generally parallel confronting terminals at the bottom thereof projecting downwardly from the bottom of said housing and upwardly extending current-carrying extensions of said terminals and a unique S-shaped fuse link extending between said current-carrying extensions. The S-shaped fuse link has about a 45.degree. angled upper and lower leg of at least about one-half the length of the central leg thereof and a width to thickness ratio of about 1/2 or less which maximizes its volume without the position contraints placed on the fuse link.

Abstract: A surface acoustic wave device includes a plurality of surface acoustic wave elements provided on a piezoelectric substrate. The device further includes a metal electrode provided on the piezoelectric substrate between and around the respective elements, and a bias voltage is supplied to the metal electrode to cause local attenuation.

Abstract: An ejection mechanism for a tape player features an operation member coupled to a manually actuated ejection member for ejection of a cassette when the ejection member is pressed inward. The operation member is coupled through appropriate linkages to an inversion spring to eject the cassette. The operation member is separately biased outward by a strong return spring, and is coupled to the manually operated ejection member by a releasable latch to be released therefrom during a terminal portion of the inward stroke when an inversion spring is properly positioned to eject the cassette. The manually operated ejection member is further coupled to raise the pack guide during initial portion of the inward stroke thereof. An electrically operated head disengagement system is similarly energized during the initial inward stroke of the ejection member. The latch is cammed to a releasing position during a terminal portion of the inward stroke of the coupled pair.

Abstract: A filtering unit for a bus, the unit comprising one outer housing of a size to fit between the row of seats in the bus and a forwardly facing wall of a bus lavatory behind the seats, the housing having air inlet and air outlet openings for communication with ducts opening in upper and lower portions of the lavatory. The housing comprises a main housing body with an interior horizontal passageway of consistent cross sectional shape extending parallel to the rear of the outer housing, the main housing body having a horizontally facing opening at the outer end thereof which is covered by a panel which is movable to expose said opening, and a drawer unit slidable into or removable from said passageway through said opening. The drawer contains at least an air filter for removing at least lavatory odor-causing gaseous and particle materials from the air stream passing therethrough and an air circulating fan and drive motor therefor.

Abstract: An ejection mechanism for a tape player includes a guide arm vertically movably supporting a pack guide, a pack stopper connected to the guide arm for frontward and rearward movement, an ejection link connected to the guide arm, and an inversion spring provided connecting the pack stopper to the ejection link to draw and eject a cassette. The ejection mechanism further includes an ejection member disposed along a lateral wall of the frame and mounted for frontward and rearward movement and biased forward by first revival spring, and an operation member similarly disposed alongside the ejection member and similarly mounted for frontward and rearward movement with respect to the frame and biased forward by second revival spring, and an operation rod coupling the ejection link to the motion operation member. An automatically releasing latch couples the ejection member to the operation member during the inward stroke of the ejection member.

Abstract: A cervical dilator assembly features a captive extraction element in the form of a collar press-fitted over one end of an insertion element made of the self-swelling vegetable stalk laminaria japonica. A withdrawal cord is affixed to the collar, the collar being captively retained in the swollen condition of the inserted dilator element so that pull on the cord causes withdrawal of the inserted dilator element without rupture or tearing thereof. In the preferred form of the invention the collar is fabricated in the form of a migration-limiting disc.

Abstract: The camera preferably has a slotted take-up spool which when the film compartment covering door is opened is automatically rotated into an ideal position where a hook in a film-capturing slot thereof has an outward facing orientation ideal for capturing a film leader perforation when the film leader is inserted therein. The slot is preferably configured as a lengthwise passage leading into a hollow axially disposed chamber within the take-up spool, the trailing edge of the slot nearest the imaging station being provided with the hook. This edge is positioned so that it does not come into confronting engagement with the film during initial advance thereof until the film is firmly captively secured over the hook.

Abstract: An electrically driven automatic film advance camera with automatic transition to rewind without external actuation is described. Film advance after each exposure occurs automatically after release of the shutter actuating button by means of an integral electric drive motor preferably contained within the film take-up spool. The end of film condition during film advance is signalled by a sudden onset in film tension, which actuates a switching system to reverse motor drive polarity and power the motor until the film is completely rewound into the cassette, whereupon motor actuation ceases. A take-up spool gear drive train remains fully engaged at all times. During the rewind operation both the take-up spool and the drive spool are driven simultaneously by the drive motor to facilitate film disengagement. A film engaging sprocket serves to govern film advance for framing purposes, the sprocket being principally in an idling state throughout the film advance operation.