In an electrical control system having equipment at different locations interconnected by a multi-wire cable including a common wire which links points of reference potential for the equipment, a compensating circuit samples current flowing in the common wire such that whenever a potential difference exists between the reference points a current is generated in a compensating wire which is extended to one of the points of reference potential to minimize the current flow in the common wire thereb...

A data transmission system employing a common signaling channel for transmitting messages is disclosed. A data-processing system is provided at each terminal of the channel and messages transmitted from each terminal over the channel are obtained from the respective data-processing system's memory unit. The signaling channel transmits blocks of words continuously in both directions, idle words being inserted in a block when there are no data messages available to be transmitted from the storage ...

An improved interface arrangement between an antenna controller and one or more antennas. The interface includes a reduced number of control lines but is capable of handling complete interface requirements including control and status between the antenna controller and the antenna.

The housing has a cylindrical cavity and central bore in the bottom wall for rotatably receiving a post on the cylindrical control member and the terminals have upper ends defining circumaxially spaced fixed contacts. A tubular conductor surrounds the post and is connected to one such fixed contact to provide a common contact adjacent all of the other fixed terminals. A ball is biased downwardly into contact with the common contact and selectively with the fixed contacts. The ball is provided in...

A common relief valve circuit for controlling or monitoring two or more pumps. The circuit includes two fixed displacement pumps with the pumps being connected to at least two valve bodies or sections that supply fluid to hydraulic cylinders for operating earth-working buckets or the like. A main relief valve is connected to the inlet of a first valve section, and a check valve is connected in a parallel cavity line in the first valve section. The check valve remains closed under conditions wher...

A method of operating a common elevator in a composite building which contains a plurality of types of exclusively used floors provided separately from each other and corresponding to a plurality of objectives, and a plurality of lobby floors provided separately from each other and corresponding to the plurality of types of exclusively used floors comprises the steps of selecting either of a plurality of operation modes respectively corresponding to the plurality of types of exclusively used flo...

Sampled input, common mode driven, differential amplifier. Both inputs to a differential amplifier are sampled with a high input impedance amplifier. These signals are then summed and used to drive a buffer amplifier. The output of the buffer amplifier then drives the floating common node of a floating power supply. The floating power supply powers the main differential amplifier.

The invention relates to a common rail for a common rail fuel injection system of an internal combustion engine, and to a method of making such a common rail, having a hollow base body that is equipped with a plurality of connection openings. To enhance the high-pressure strength, the interior of the base body is embodied as substantially flat in the region of the connection openings.

A common driver circuit for driving a load heavy in a capacitive property such as a common electrode or the like of a liquid crystal panel is composed of the simple circuit construction provided with each circuit of the voltage follower, the low-pass filter, the feedback, the control so that the variation in the direction current component which gives bad influences in the processing of the signals of this type of circuit is restrained to improve the reliability, and the direct current is not re...

A common base amplifier (29) has an input (31) and an output (32). A transistor (33) has an emitter coupled to the input (31) of the amplifier (29), a collector coupled to the output (32) of the amplifier (29), and a base coupled to a voltage reference (34) provides low input impedance and unity current gain. A control circuit (38) controls a first bias circuit (36) and a second bias circuit (37). The second bias circuit (37) is coupled to the collector of the transistor (33) and provides a bias...