A system wall or system ceiling comprising a number of supporting girders suspended from the structure of the building and to which slabs are mounted substantially extending perpendicular to the girders, the girders being provided with outwardly or downwardly protruding clamping feet engaging one or more slits, cut into the upper or back side of the slabs.

An interface system for receiving from a host computer a series of dot data as print information, and converting the received data to dot information and for providing the same to a printing system. The interface system has a pseudofont memory in which dot information is stored as column vectors obtained by matrix-transposing row vectors of several series of dot data in advance and a bit map memory in which dot information corresponding to the received serial dot data is stored. For a printing o...

A transportation system having a roadway and vehicles movable over the roadway, the vehicles being levitated over the roadway by air cushion or magnetic means and the vehicles and the roadway having cooperable magnetic means for maintaining the vehicles properly aligned relative to the roadway. A vehicle movable over a roadway provided with ferromagnetic side rails, the vehicle having selectively energizable electromagnet assemblies at its sides cooperable with the ferromagnetic side rails for m...

In a credit checking system, a system monitor tests the communications link between counter units in outlying stores and a central location. The system monitor periodically sends Request signals over a telephone line to the central processing unit. In response to an unconditionally valid account number encoded by the system monitor and transmitted to the control processing unit (CPU), a valid signal is returned to the monitor. If this valid signal is not received, the counter units are switched ...

An AGC system for a communications system wherein AGC pilot signals originating in separate branches are combined on a single branch is shown. The frequencies of the pilot signals are off-set by a frequency difference sufficient to prevent beat frequencies from deleteriously affecting the gain control of amplifiers responsive to the pilot signals.

A demodulating system for the multivoice TV system, which is constituted so that a tuner is tuned to receive the sum signal and the difference signal of an aural signal and a pilot signal which are transmitted together with a video signal, the selected signal is given to an intercarrier demodulator and an aural signal band-pass filter, the intercarrier demodulator provides a beat signal corresponding to the difference between the video carrier and the sound subcarrier, the beat signal is demodul...

In communications systems, such as cordless telephone systems, in which synchronizing signals are transmitted at predetermined intervals on a signalling channel by base stations to say portable, battery-powered receivers, the need to send separate station identification signals is avoided by the synchronizing signals being transmitted from a base station in accordance with a predetermined signalling sequence, for example a pseudo-random sequence, and the receivers using the sequence as a base st...

A station diagnosis method in a communications network system including a closed ring transmission line and a plurality of data stations which can be connected to the ring transmission line by a plurality of line concentrators disposed in the ring transmission line wherein an internal ring transmission line is formed in the line concentrators so that the operation states of the line concentrators are diagnosed by transmitting diagnosis data through the internal ring transmission line.

A high security sealing system is described wherein a single-piece security seal has a lock introduced in a cavity through two openings formed respectively in two elements to be sealed. In order to prevent that a predeformation allows an apparent closing of the system, whereby a violation could take place, the invention proposes the formation of a deflecting member (18, 18') inside the cavity (9), so that, when the lock (26) of the seal (13) is introduced, the lock is inclined with respect to th...

A production system for an expert system comprising: a production rule memory unit storing circuit conversion rules, each having a condition part describing circuit connection and an execution part describing a conversion of the condition part to an equivalent logic circuit dependent upon a predetermined semiconductor technology and further having a provisionally predetermined priority; a task data memory unit storing circuit connection data, each being subjected to an application of the circuit...