Abstract: According to the invention, there is provided a so-called picture-in-picture type television receiver in which a sub-picture screen is displayed within a main picture screen in a picture-in-picture fashion. When a picture based on a base band video signal from an external source such as a VTR, for example, is displayed on the sub-picture screen, if the sub-picture channel selecting means is then operated, the picture of a broadcast television channel is then automatically displayed on the sub-picture screen. This feature allows the omission of a video signal source switching means for the sub-picture, thus protecting the viewer from being confused when using the controls of the television receiver.

Abstract: A picture-in-picture type television receiver in which a sub-picture screen is provided within a main picture screen and the pictures on the main and sub-picture screens can be exchanged by a viewer operated control. According to this television receiver, when a command for exchanging the pictures is issued, if the picture displayed on the main picture screen is of a PAY channel (CABLE CHANNEL), the main and sub-channels cannot be exchanged with each other, and the exchange of the pictures is inhibited. The viewer is warned of this exchange inhibition for a predetermined time period. Thus, the user can utilize the television receiver more conveniently and is relieved of any anxiety when the pictures are inhibited from being exchanged with each other.

Abstract: A sensing amplifier for a random access memory (RAM) having a first differential amplifying circuit formed of a first pair of transistors having their sources connected together, their gates supplied with differential input signals, and their drains connected with symmetrical type active loads; and a second differential amplifying circuit of a current mirror type formed of a pair of transistors which is connected in series with the first differential amplifying circuit.

Abstract: A linear synchro/resolver comprised of an opposed pair of stator assemblies, each of which has a plurality of corresponding, opposed, toothed pole piece pairs, a toothed slider movably mounted between the opposed sets of pole piece pairs, and wherein the pole piece pairs on each stator assembly are spaced apart along the assembly's length by a non-integral multiple of the pitch of the stator teeth. Separate coils are wound on the stator pole pieces, with the coils of adjacent and opposed pairs of coils being connected together in phases. The inductance of the coils is thus a function of the alignment of the slide teeth with the stator pole piece teeth. A source of alternating current is connected to the phases of coils, the current magnitude flowing through each phase of the coils is detected, and the current magnitude differences between the phases are amplified.

Abstract: A method of updating an optical memory disc, the disc being of the type that has a plurality of zones, one of the zones containing at least one directory block that includes a plurality of entries in the form of addresses which point at data. The method comprising the steps of reading the entries of the one directory block into a temporary location; altering the entries of the one directory block with new directory information; dividing the entries of the one directory block into two new directory blocks, each of the new directory blocks being designated by a separate pointer; writing the two new directory blocks from the temporary location onto the optical memory disc; and storing the pointers in a new directory pointer block of the optical memory disc, whereby subsequent addition of new directory information requires the alteration of less than all of the directory blocks.

Abstract: In a multiple scanning type television receiver in which a horizontal frequency of a horizontal deflection circuit and a capacity value of an S-shaping capacitor are both switched by an output signal from a frequency to voltage converter which detects a horizontal frequency of an input signal and converts the same to a voltage changing in response to the frequency, a horizontal deflection circuit of a multiple scanning type television receiver being characterized in that a detector is provided for detecting said switching time point and during a transient period obtained from said detector, the power source of said horizontal deflection circuit is cut off.

Abstract: A workpiece is centered on a transparent work surface by optically transposing one edge of the workpiece to a point beneath the work surface and adjacent the opposite edge of the workpiece and then sliding the workpiece sideways until the transposed edge image is aligned with the actual second edge of the workpiece.

Abstract: A terminal which is capable of receiving, converting and displaying both NAPLPS and PRESTEL coded signals and which includes means for invoking NAPLPS control and character codes, corresponding to the same, received PRESTEL codes, to an in-use table from NAPLPS code look-up tables at the terminal and for separately processing, decoding and converting PRESTEL attribute codes to produce corresponding NAPLPS codes.

Abstract: The top wall of the container opposite the bottom slopes upward slightly at one side where a curved neck adjoins it. At the far end of the neck, there is a threaded cylindrical mouthpiece holding an insert, which may have a drip-disk at the outer end if the container is used for a liquid cleanser. The center line of the cylindrical mouthpiece is slightly inclined downward relative to the horizontal. A depression in the top wall catches drops of liquid falling from the drip-disk, if any. In the area of transition from the top wall to the neck, the latter is partially encircled by a groove leading into the depression. Any drops of liquid clinging to the neck are guided by this groove into the depression. Thus the part of the container intended to be grasped always remains dry.

Abstract: A 2-18 gigahertz monolithic distributed amplifier using dual-gate gallium arsenide field effect transistors for maximum gain over the design bandwidth.

Abstract: A distortion compensating circuit for use with voltage-controlled amplifiers and other circuits responsive to a control signal source. The compensating circuit is connected between the control signal source and a control input to the controlled amplifier. The compensating circuit provides a compensated control signal which cancels out non-linearities in the controlled amplifier. The circuit includes reproduction circuitry which provides a feedback signal having a relationship with the compensated control signal similar to the non-linear relationship present in the controlled amplifier. Additional circuitry connected to the control signal source is provided for adjusting the compensated control signal so that a linear relationship is maintained between the uncompensated control signal and the feedback signal.

Abstract: A synchro/resolver, preferably for use in combination with a similarly constructed servo motor, having an annular stator with circumferentially arranged poles, each having a plurality of regularly pitched teeth and each pole with its own coil winding thereon, and with the coils being connected in phases, an annular, toothed rotor positioned adjacent to the stator so that a change in rotational position of the rotor changes the inductance of the coil windings as a function of the position of the rotor's teeth vis-a-vis the stators' teeth, and a detecting circuit for sensing alternating current flowing in each coil phase and for amplifying the differences between the currents in each phase to produce a rotational position output signal for commutating the motor, the stator being divided at its longitudinal midpoint into two halves which are rotated with respect to each other by a distance equal to one tooth pitch divided by the number of phases and being separated from each other by a lamina of non-magnetic mat

Abstract: The arrangement comprises mounting supports for the spring slats, insertable in the longitudinal beams of the bedstead, with two upper spring-slats serving as a support for the mattress and undulating spring-slats situated below them. A tiltable holding part having four receptacles for the spring-slats is fitted on a plug of the mounting support. Below the plug there is a resilient bearing pad enabling the holding part to deflect vertically. The upper spring-slats are bent convexly upward and have a broadened cross-section in the middle. By means of the undulating lower spring-slats, a progressive spring action is achieved. There is no sagging of the mattress in the region of heavier parts of the body, optimum spring action being ensured nonetheless. It is possible to divide the bedstead into zones of differing degrees of firmness by selectively providing mounting supports with only upper spring-slats or with additional lower spring-slats.

Abstract: Apparatus and method for controlling a magnetic head carriage while reading or writing data on a magnetic disc by the use of a pair of heads having zero intertrack spacing and having azimuth angles of plus and minus 45.degree. with the circumference of the disc to sense the timing and phasing of sector sync pulses recorded on the disc and, from such timing phasing, as read by the heads, the rotational position of the disc and the radial position of the head carriage, to generate an appropriate head carriage servo signal which compensates for eccentricity of the disc.

Abstract: A synchro/resolver, preferably for use in combination with an identically constructed servo motor, having an annular stator with circumferentially arranged poles, each with its own coil winding thereon, and with the coils being connected in phases, an annular rotor positioned adjacent to the stator so that a change in rotational position of the rotor changes the inductance of the coil windings as a function of the rotational position of the rotor, and a detecting circuit for sensing alternating current flowing in each coil phase and for amplifying the differences between the currents in each phase to produce a rotational position output signal for commutating the motor.

Abstract: A toothed, synchronous reluctance motor of the type having a motor made of laminations of magnetic material, has a plurality of laminations of conductive, non-magnetic material interspersed throughout the rotor to act as flux guides for radially collimating the magnetic flux passing through the rotor.