Abstract: A metal junction thermoelectric device includes at least one thermoelectric element. The thermoelectric element has first and second opposite sides, and a first conductor made from a first metal, and a second conductor made from a second metal. The first and second conductors are electrically interconnected in series, and the first and second conductors are arranged to conduct heat in parallel between the first and second sides. The first metal has a first occupancy state, and the second metal has a second occupancy state that is lower than the first occupancy state. A temperature difference between the first and second sides of the thermoelectric element causes a charge potential due to the difference in occupancy states of the first and second metals. The charge potential generates electrical power.

Abstract: A method and an apparatus for transmitting and receiving a voice signal simultaneously with a video signal via a single transmission line in a video phone. The apparatus comprises video signal receiving means for discriminating if a carrier frequency in the video signal being sent via the transmission line from a counterpart is which of a second frequency or a third frequency set within a frequency band of transmission line, demodulating the video signal with one of the second and third frequencies depending upon the discriminated result, and outputting the demodulated video signal to a displaying monitor; and video signal transmitting means for inputting the video signal from a self-camera, modulating the video signal with the other of the second and third frequencies and outputting the modulated video signal to the transmission line.

Abstract: Supervisory alarm transmission and remote alarm receipt devices which, when an emergency event such as a burglar, a fire or the like that is being monitored by a supervisory alarm device takes place, the emergency event is transmitted through telephone lines in order for a remote supervisor to be able to directly watch a spot situation through a monitor, consisting of a supervisory alarm transmission device which comprises an alarm processing control section, a video data processing section and a data transmitting section, and a remote alarm receipt device which comprises a data receipt section, a receipt processing control section and a data processing section.

Abstract: An apparatus for automatically sensing televiewing distance to determine whether or not a televiewer is standing within a predetermined potentially harmful distance in front of a television set by making use of the elapsed time difference between an ultrasonic pulse generated and emitted from a transmitter located on the television set and which is then reflected from a televiewer located in front of the television set. The reflected pulse is then received by an ultrasonic wave receiver also located on the television set and in the event that the televiewer stands within the predetermined distance for a time longer than is required, for example, to make a manual adjustment to the television set, a signal is generated which deactivates the video portion of the television set until such time that the televiewer moves to a safe distance away from the set beyond the predetermined potentially harmful distance at which time the video portion is again reactivated.

Abstract: This disclosure depicts a circuit for protecting eyesight from the screen of a TV set. A infrared transmitter is provided on a side of the front of the TV set so that pulse signals therefrom are received on a receiving-amplifying portion for remote control already installed in the TV set after reflecting upon a viewer within a predetermined distance from the TV screen. A monostable multivibrator has an input for receiving pulse output signals from the remote control receiving-amplifying portion in response to reflected pulse signals applied thereto and also has an output. A delay circuit portion has an input operatively connected to output of the monostable circuit portion and also has an output, producing the level signals on the ouput thereof when higher level signals are applied on its input over a predetermined time and otherwise producing lower level signals.