Abstract: A peripheral device has a bus-controlled switching arrangement for operating a power supply. A device comprises a bus interface adapted for communicating with a remote device via a bus. A switch circuit is connected between the bus interface and a power supply. The switch circuit is operative, when the power supply is in an inactive state, for sensing bus activity and for generating a signal for activating the power supply in response to the sensed bus activity, wherein the switch circuit has no power dissipation when no activity is sensed on the bus.

Abstract: A wall mounted display device having user friendly connectors for coupling with one or more remote appliances is described. The wall mounted display includes a connector portion that is moveable with respect to the display device. The moveable connector portion is positioned along a portion of a side of the display device and provides easier access to connectors needed to couple a remote appliance to the display device. Alternatively, the screen of the display device is moveable with respect to a wall to which the display device is mounted. The screen is moveable in a plane substantially parallel with the wall upon which the display device is mounted, pivotable at an angle away from the wall upon which the display device is mounted, or rotatable with respect to an electronics portion of the display device.

Abstract: Embodiments of the invention provide an off line DC-DC converter comprising a transformer (180) coupled to a monolithic integrated circuit (405). The transformer applies an input supply DC voltage (Vin) applied to a primary winding (181) of the transformer to produce an output supply DC voltage (Vout) provided from a secondary winding (182). The monolithic integrated circuit (400) comprises a switching regulator including a switch (151) and a switch controller (100) on a first portion of the monolithic integrated circuit. A capacitive isolator (201) is provided on a second portion of the monolithic integrated circuit. The monolithic integrated circuit regulates the output supply DC voltage and isolates the output supply DC voltage from the input supply DC voltage with respect to electrical shock hazard.

Abstract: A method for controlling dissipation in a video amplifier for a display signal. The method comprises the steps of setting a first current for establishing a first gain bandwidth product in the video amplifier. Generating a control signal in accordance with a slew rate of the display signal. Modifying the first current responsive to the control signal such that the video amplifier gain bandwidth product is controlled in accordance with the slew rate of said display signal.

Abstract: A power supply with capacitive mains isolation, comprises a source of an input supply voltage developed between a first terminal and a second terminal. A first supply inductance is coupled to the first terminal, and a second supply inductance is coupled to a load circuit. A switch responsive to a periodic control signal applies the input supply voltage to the first supply inductance to generate a current in the first supply inductance at a first polarity, during a first portion of a period of the control signal when the switch is at a first switch state. A pair of capacitors operate to couple the first supply inductance to the second supply inductance during a second portion of the period of the control signal when the switch is at a second switch state. The pair of capacitors isolate the first and second terminals, respectively, from the second supply inductance at a range of frequencies that is lower than a frequency of the control signal.

Abstract: A method for controlling dissipation in a video amplifier for a display signal. The method comprises the steps of setting a first current for establishing a first gain bandwidth product in the video amplifier. Generating a control signal in accordance with a slew rate of the display signal. Modifying the first current responsive to the control signal such that the video amplifier gain bandwidth product is controlled in accordance with the slew rate of said display signal.

Abstract: A synchronous burst mode power supply includes a power converter for transforming an AC mains from a relatively low frequency to a higher frequency, and a gate circuit responsive to the AC mains supply for enabling the power converter (2) to initiate a burst of output pulses at the higher frequency each time the AC mains supply occurs within a predetermined range. In an alternative embodiment, the power supply has a regulating circuit for regulating output from the power converter that includes a current feedback loop to the gate circuit for pre-regulating control of the power converter in response to load variations.

Abstract: A switched mode power supply circuit for a video display apparatus having run and standby modes of operation A run mode power supply provides an output voltage for the video display apparatus during the run mode of operation. A standby mode power supply provides an output voltage for the video display apparatus during the standby mode of operation. A switched mode power supply controller circuit provides drive pulses to the run mode power supply during the run mode and to the standby mode power supply during the standby mode. A snubber circuit of the standby power supply is used to turn off a start-up transistor during the standby mode of operation to prevent power dissipation in a start-up resistor.

Abstract: A power supply circuit for a video display apparatus having run and standby modes of operation. A resistor has a first terminal coupled to a power supply controller circuit for enabling operation of the power supply controller circuit. A standby mode power supply provides an output voltage for the video display apparatus during a standby mode of operation. The standby mode power supply utilizes a standby transformer having a secondary winding coupled to a second terminal of the resistor. The secondary winding provides a low voltage to the resistor to minimize the power dissipated by the resistor.

Abstract: An amplifier (60) provides an amplified video signal in response to a video input signal supplied thereto. A cathode current sensor (Q3), couples an output of the amplifier to the cathode of a kinescope (20) and also provides an output current (Ik) proportional to the kinescope cathode current. A feedback path (82) applies a portion of the sensed cathode current provided by the cathode current sensor to a circuit node (65 or 63) in the amplifier for imparting gamma correction to images produced by the kinescope. In one application the cathode current is apportioned (Q3, Q5) to provide gamma correction for the kinescope and to provide automatic kinescope bias (AKB) control.

Abstract: A mowing machine having cutting elements and a beam for attaching to a tractor, and an intermediate structure to which is connected the beam, the cutting elements comprising a first and a second cutting group each group extending on the opposite side of the intermediate structure. The cutting groups are removably mounted on the intermediate structure and optionally are associated with conditioning members for further handling harvested produce.

Abstract: A machine for planting seeds includes a rotary soil lifting device which lifts broken-up soil, a tamping roller which tamps the remaining broken-up soil, an arrangement for placing seeds onto the upper surface of the tamped layer of the ground, and an arrangement for conveying the soil lifted by the soil lifting device past and upwardly of the tamping roller and for depositing this soil onto the tamped surface and onto the seeds placed thereon as a layer of uniform thickness. A compacting roller may be used to compact the soil of this layer after the formation of the latter, and the machine includes breaking-up tools of the fixed or rotating type mounted at the front region of the machine for breaking up the soil prior to and to a depth sufficient for the performance of the lifting operation by the soil lifting device. The conveying arrangement may include two hoods which together define a passage through which the lifted soil advances upwardly of and beyond the tamping roller.

Abstract: An agricultural machine to be pulled by a tractor and having working tools driven by outer driving sources comprises a chassis arranged to support the working tools, a beam unit arranged for connecting the chassis with a tractor and including a first beam and a second beam, a transmission including a first portion and a second portion turnable relative to one another and arranged so that the first portion is connected with the first beam turnable relative to one another about an upward axis of turning of the portions whereas the second portion is fixedly connected with the second beam, a locking element arranged to lock the rotation between the first portion and the first beam, and a driving device arranged in the transmission and including two input shafts located in the first portion and receiving the movement from one driving source, an output shaft located in the second portion and adapted to transmit movement to the working tools at approximately the same speed independently of the input shafts which rec

Abstract: In a mower having a frame and a plurality of rotatable disks supported by the frame, a driving device is operable to rotate each disk, and includes a driving wheel associated with each disk, and a shaft in driven connection with a corresponding driving wheel. A coupling in driven connection with a corresponding shaft for coupling a corresponding disk to the corresponding shaft is provided, and an antifriction bearing guides the corresponding shaft. Each driving wheel and its corresponding shaft, coupling and anti-friction bearing constitutes a separately replaceable subassembly in the mower.

Abstract: A rotary mower includes first and second supports extending in a predetermined direction and connected to one another end-to-end, and a set of elongated blade carriers rotatably mounted on each support. Each blade carrier, upon rotation, defines a trajectory, and neighboring blade carriers on opposite supports are mounted so that their trajectories do not overlap. First and second drive units are provided to drive each set of elongated blade carriers, respectively.

Abstract: A mower-conditioner for cutting and conditioning grass or other fodder comprises in combination a housing accommodating a cutting device (for example a bottom-driven disc-type rotary scythe device or a reciprocating cutter bar device) and a first conditioning device (for example a flail drum rotating about a horizontal axis and provided with pivotally-mounted flails), and a second conditioning device (for example a belt-driven fluted drum). The said first and second devices have at least one element (for example the said flail drum and driving belts or the like) in common. There are combs and grids to act on the cut fodder, and the mower-conditioner is readily adjustable for the treatment or production of different kinds of fodder.

Abstract: The disclosure is of, in a mower which works over a great cutter width and comprises cutter discs or cutter drums or cutter belt pulleys or other rotary elements involved in the cutting operation, at least one device for reducing the width of the windrows comprising an endless flexible windrowing member which travels around two drums having substantially vertical axes of rotation, the first of said drums being approximately above one of said rotary elements at one extremity of the mower, the second of said drums being spaced to the rear of and nearer to the middle of the mower so that the windrowing member follows a path at an acute angle to the cutting front, at least one of said drums being driven at a speed different from that of said rotary elements so that the windrowing member impels cut fodder from a margin towards the middle of the windrow.

Abstract: The disclosure is of a fodder mower-conditioner mounted laterally of a tractor and comprising two or more rotary-scythe cutters and one or more conditioning rotors all rotating about axes which as viewed from above fall within a horizontal plane of a width equal to and containing the horizontal diameters of the tractor rear wheel tires, the rear wheel tire which is nearer the mower-conditioner being nearer to the nearest cutter trajectory than to the nearest conditioning rotor bearing.

Abstract: In a mower having a frame and a plurality of rotatable disks supported by the frame, a driving device is operable to rotate each disk, and includes a driving wheel associated with each disk, and a shaft in driven connection with a corresponding driving wheel. A coupling in driven connection with a corresponding shaft for coupling a corresponding disk to the corresponding shaft is provided, and an antifriction bearing guides the corresponding shaft. Each driving wheel and its corresponding shaft, coupling and anti-friction bearing constitutes a separately replaceable subassembly in the mower.