An audiovisual card reproducing device of the type in which when an audiovisual card is inserted into a slit in a cabinet, visual information printed on the upper surface of the card may be viewed through a window while audio information recorded on a disk-record mounted on the undersurface of the card may be reproduced. Means is provided for correctly locating the inserted card and holding it in operative position. Furthermore, preventive means is provided for preventing the damage to the progr...

A PCM signal is divided into groups each including S sampled values represented by B bits respectively and R code error check bits are added to each group to form one frame. The frames are successively and repeatedly recorded in N tracks on a recording medium with frame synchronizing signals each including M bits, the signals alternating the frame in each track. The frame synchronizing signal in each track delays the next track by m bits. The m satisfies Where m' designates the number of bits fu...

In order to solve a problem that it takes a long time to shift from a write mode to a read mode when there is a cross talk of an output signal of a recording head to a reproducing amplifier side, there is provided a reproducing amplifier including an amplifier circuit portion having a differential pair of transistors is provided with a switching circuit comprised of switches connected with resistors, which supply a bias voltage to each base of the differential pair of transistors, respectively i...

An improved stylus, capable of following more faithfully not only horizontal and vertical vibrations but also 45.degree. vibrations, has an operative portion, for contacting the sound grooves, defined at any point thereof by the relationship that the projections of the operative portion onto the horizontal plane in respect to the axis of the stylus is part of an ellipse having a major diameter in which 0 is the angle between the horizontal plane and the line connecting the point and the center o...

A sorting apparatus for collating the output of a reproducing machine comprises a plurality of sheet receiving bins arranged in a row. The bin spacing for the first and last bins is greater than that for intermediate bins. The narrow spaced intermediate bins are articulated to allow their bin entrance openings to be increased as a sheet is fed into them. Individual deflection gates are associated with each of the bins. The deflection gate for the first bin is actuated by means of a solenoid wher...

An improved cleaning apparatus adapted for use in removing residual material such as toner from an imaging surface of a reproducing machine. A cleaning element is supported for rotation about a given axis and a housing is arranged about the cleaning element. A vacuum air flow is created through the housing and about the element in order to collect the residual material removed. The vacuum port is arranged at one side of the housing. A baffle reduces the asymmetric variation in air flow caused by...

A voice or sound unit adapted for use on toys and the like has a mechanical linkage system with a joint capable of transmitting sound indicia while isolating the tone arm from any absorption of stylus movement. The tone arm can employ flexure hinges to insure a constant force on the stylus. A planetary gear coupling system provides a unique drive transmission to either a single turntable or a pair of concentric turntables. If a pair of turntables are used, they can be relatively rotated to combi...

A reproducing objective lens for videodiscs comprising five single lenses for which the working distance is large and flatness of field and resolving power are high.

In an image-reproducing system in which a number of beams scan over a record medium together and contribute to the formation of half-tone dots, an anamorphic system is included in the beam path to match the beam cross-section to the shape of mask apertures in the light paths and to compress the length of the line of beams, transverse to their direction.

A system for recording and reproducing information using Fourier transform holography wherein original information to be recorded as holograms is divided into a number of groups each including N(N .gtoreq.2) information units, each unit including a given amount of information. This information is recorded by a holographic technique on a track or tracks of a record medium as a series of holograms from a plurality of unit-information input positions, or from a single unit-information input positio...