A pager includes a bar code reader, which reads from a function setting bar code list functional data to be set to a pager and which stores the data in the ROM. Since the function setting data is read from the bar code, the ROM writer is unnecessary when the user changes the function. The user need only prepare a function setting bar code list and is hence relieved from inconvenience to bring the pager to the service firm. In addition, the electrodes for the connection between the pager and the ...

The credit card is precoded in binary code representing several digits and has a locator indicator to insure that the card is correctly positioned when inserted in the console or read-out station. The card coding includes the method of arranging high dielectric constant spots or discs and low dielectric constant spots or discs in several groupings related to a plurality of identification digits. The circuitry for reading the encoded data on the credit card includes a capacitive voltage divider t...

A control apparatus for controlling a plurality of electrical devices comprising a plurality of electrical devices, a central operation device for generating a plurality of control signals for controlling the electrical devices, the plurality of control signals comprising a first signal for driving a first electrical device and a second signal delayed in time from the first signal to permit discontinuance of the driving of the first electrical device if a high current is detected passing thereth...

A device for transmitting a coded information about an actual signal condition of a signalling system, in which a plurality of conductor pairs are energized from assigned a.c. power sources upon actuation of corresponding signal devices, separation transformers each having a plurality of secondary windings are connected to respective conductor pairs and signals from the secondary windings are rectified and fed to assigned inputs of a code unit.

A system for use by persons who may have muscular incoordination and/or spasticity or the like is provided with means for controlling the disabling of a function producing means depending upon the person's motor capability. A disabling circuit is responsive to an actuation of any of a variety of input interface means whereby subsequent actuations of the input interface means prior to the expiration of a variable, predetermined disabling time interval produce no function.

An alarm attached to the shoulder harness seat belt of an automobile wherein to sound an audible alarm when any forward pressure is exerted on the belt.

An automatic sequencing circuit is disclosed which recognizes a particular coded input signal, initiates a process or data operation, and provides a coded output indicative of the operation performed. The circuit is particularly suited to hardware implementation of the control graph of a directed-graph design for any equipment using digital logic circuits.

The disclosure relates to a verification system of the type which affords authorized persons access to check cashing facilities, private buildings, or the like. The verification system comprises a plurality of sets of switches, each set including a plurality of switches comprising a first group of switches and a second group of switches, coupling means coupling the first group of switches for each but one set of switches to all of the switches of the next succeeding set for serially coupling the...

In a typical transportation vehicle control system, coded control information is transmitted to the transportation vehicles on vehicle command signals comprised of multiple message frequencies. A decoder is disclosed for decoding, in a fail-safe manner, information from message words which are comprised of message units carried on the multiple message frequencies. Vehicle speed command signals which are received by an antenna are amplified and frequencies which are substantially the same as the ...

A digital data communication network in which half-duplex communications are established between a central station and a plurality of remote terminal devices under control of the central station and in which said remote terminal devices are grouped and each group is serially connected and receives data signals in parallel over a simplex link from the central station and in which one group of serially connected stations is selectively connected to a second simplex link for transmitting, in a pred...