A data support such as a card or tape has a data-receiving surface delineated with rectangular digit areas in each of which a decimal digit can be recorded. Each digit area is delineated by a dark rectangular frame printed on the data-receiving surface, the area of the surface within the frame being subdivided into an array of elementary square areas arranged in three columns each of five elementary areas. Predetermined ones of the elementary areas, the second and fourth in the middle column, of...

A data recorder comprises a tape deck having a recording medium in the form of a tape which is drivable by first drive means, in a recording mode, at one speed and drivable by second drive means, in a replay mode, at a different speed, the first and second drive means being operable to drive the tape through common drive elements and the arrangement being such that when the second drive means is in a driving position relative to the tape deck, the first drive means automatically is disconnected ...

A data recorder comprises a tape deck having a capstan operable to drive a recording medium in the form of a tape, and drive means operable to drive the capstan, the drive means comprising a motor drivingly connected to the capstan through one or both of a pair of flywheels which in use are arranged to rotate in opposite directions. In this way, the drive to the capstan is stabilised even when the recorder is subjected to angular acceleration.

A data recorder comprises a DC motor for driving a magnetic tape, a buffer register for temporarily storing input data, a counter adapted to be counted up by a value corresponding to an amount of data stored in the buffer register, a D-A converter connected to the counter and adapted to generate an output signal in accordance with the counted value and control the rotation of the motor, and a decoder for generating an output in accordance with the rotation speed of the motor. The data is read ou...

The invention relates to a data register with a register card selection mechanism, whose selector keys connected with the swivel levers are arranged one behind the other and alongside one another in an opening of the housing in such a way that the width of each selector key corresponds to the width of the swivel levers, while the card restraining pins on each swivel lever are formed from U-shaped portions shaped onto the swivel lever end with a rod which engages from below in the register card o...

A data compression apparatus is described having an encoder and a decoder. Data in the form of an N-bit data message from an external data source is received in the encoder and stored in an N-bit memory. Coupled to the memory is a "one's" detector and three arithmetic units. The "one's" detector counts the number of logical "one's" in the N-bit message irrespective of their position in the memory for generating a number Q. The three arithmetic units sum columns of the contents of the memory in t...

A viewer has a telescopic housing and includes a lens system carried by one housing part and a plurality of correlated information sources supported by another housing part and arranged serially along the optical axis of the lens system in a plurality of focal planes. At least one of the information sources comprises a transparency which has data thereon and is disposed between the lens system and another of the information sources. When the lens system is focused on the one information source t...

In a data processing system and method, particularly for processing data derived from a gauge which is measuring the thickness of continuous metal strip issuing from a metal processing plant, the value of the measurement data is sampled at successive time instants and the sampled values are processed such as to derive their mean and standard deviations. The successive time instants are randomly or psuedo-randomly distributed in time so as to avoid the possibility of the values of the data sample...

A data buffer makes use of a plurality of buffer storage cells into which serial bit streams are sequentially written, in order to obtain correction for phase jitter. A write clock signal is derived from the serial bit stream and is used to sequentially write the digits into the cells. A stable clock source is used to provide the basic timing for sequentially reading the bits out from the buffer storage cells, and a logic circuit is used in conjunction therewith to obtain the retimed serial bit ...

An improved, compact, power saving data latch having utilization as a synchronizer circuit or as a circuit to sample and store input data for subsequent signal processing. The presently improved data latch is fabricated by means including a static flip-flop cell. A transmission gate is connected between an input terminal of the flip-flop cell and a source of input data. A source of clock signals is connected to another input terminal of the flip-flop cell and to a control electrode of the transm...