A train communication and control system is described having the cars of the train connected by a two-wire train line running continuously from car to car. Each car has a transmitting circuit and a receiving circuit connected across the line. Any car may be selected to be a master unit. The selection of one car as a master unit disconnects the power sources of all other cars from the train line, leaving the master unit power source as the sole power source for the line. The master unit or any ot...

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 ...

An RF tag (10) includes an RF receiver (16) and an RF transmitter (18). A power source (12) provides power to the receiver and transmitter. The power source includes a plurality of energy converters (22, 24, 26, 28, 30, and 32). Each energy converter is responsive to a predetermined form of incident energy for converting its respective predetermined form of incident energy to electrical current. At least two of the energy converters are responsive to respective different predetermined forms of i...

A mechanical key and lock set with a rotating cylinder includes an electronic interlock which is responsive to the insertion of a mated key in the cylinder and proper rotation of the cylinder. A sensor is placed in communication with the cylinder and senses proper rotation of the cylinder to generate an activation signal. Systems controlled by the lock cannot be enabled without the generation of the activation signal. Fail safe blocking circuitry is placed in communication with the activation si...

An easy-to-install automotive security system mounts a siren assembly in the engine compartment and a sensor assembly in the passenger compartment. The assemblies are in wireless, radio frequency communication, thereby eliminating wires extending between the compartments.

A control apparatus for controlling a paging receiver capable of displaying a corresponding message and a state information includes an antenna 1 for receiving an RF signal; an RF receiver 2 for demodulating received RF modulation signal from the antenna 1; a waveform shaper 3 for shaping waveforms into a secondary signal after filtering the demodulated signal; a micom 4 for controlling the paging receiver; an EEPROM 5 for discriminating data of the paging receiver; an alert driver 6 for generat...

A remote control transmitting device for a robot includes a secret number switching unit for inputting user's secret numbers; a function selecting switch for allowing the user to select a robotic function; a high level & open signal transmitting circuit for outputting voltage signals representing various robotic functions, respectively; an operation command switching unit for receiving operation commands from the user such as release, warning sound, scouting, left, forward and right; a low and e...

A remote control keyless security system is presented herein for remotely controlling locking means mounted on a vehicle. A receiver is mounted on a vehicle. A remote transmitter includes a plurality of switches each representative of a control function to be performed and circuitry responsive to actuation of one of the switches for transmitting a digital signal having a security code, a sequence control code adapted to be sequentially changed in response to each actuation of a switch and a func...

In a radio paging receiver having individual and common paging numbers and including a memory (20) which comprises a first part (20a) for memorizing individual messages, such as a directory number to be dialled by a user of the receiver, received by the use of the individual paging number and a second part (20b) for memorizing common messages, such as an exchange rate, received by the use of the common paging number, a first selecting section (41, 43) produces a first selection signal and a seco...

A single-ended halogen incandescent projector lamp having a reflector mount fixed to the lamp frame remote from a bi-planar filament array. The lamp has a lamp envelope with a pinch seal at one end and a fused tip portion at the other. The lamp frame has a pair of frame conductors extending longitudinally in the lamp vessel, a pair of transverse quartz bridges between which the filament array is supported, and a frame center support extending into the fused tip portion from the bridge closest to...