Abstract: An automatic data restore apparatus utilizing a pair of memory transistors in conjunction with a dual node detection circuit driving two cross-coupled NOR gates to provide a temporary store memory unit.

Abstract: A communications device for use under water by a human speaker. A tubular base member has a mouthpiece located at one open end thereof and an inflatable air bag mounted about another open end thereof. In use, the speaker places the mouthpiece around his mouth to form an air seal therebetween and blows into the air bag to partially inflate it. When so inflated, the speaker talks into the device with voiced sounds being transmitted to the surrounding water through suitable transmitting means attached to the base member, preferably the air bag itself. During talking, the air bag receives and returns the air used by the speaker, thereby effectively preventing the escape of air bubbles from the device which otherwise interfere with communications. The air bag is preferably an elongated, flexible balloon which can be stretched into an extended position when speaking into it under water.

Abstract: A high speed sensing circuit is described incorporating complementary metal oxide semiconductor field effect transistor circuitry for sensing, amplifying and storing a signal indicative of the polarity of the difference voltage across two load elements. The load elements may be a pair of variable threshold transistors.

Abstract: A method and apparatus for moving rolls of plastic material from one location to another. The apparatus consists of a belt that is tightened around the periphery of the roll. Strategically positioned lift attachments are positioned on the belt so that various diameter rolls can be moved by the same belt.

Abstract: A memory system utilizing an array of dual gate variable threshold MNOS memory transistors is disclosed which may be operated such that a single MNOS transistor is used to store each bit of digital information or in a second mode which utilizes two MNOS transistors for each bit stored. The threshold of the transistor interrogated is used to determine the state of a flip-flop comprising a pair of cross-coupled MNOS transistors. A particular transistor of the array is interrogated by coupling appropriate "row select" and "column select" signals to the row and column select terminals. Transistors comprising the first and second columns have their source terminals connected in common and to the drain terminal of the first transistor of the cross-coupled pair. Similarly for, the third and fourth columns. First and second reference transistors also have their source terminals respectively coupled to the drain terminals of the first and second transistors comprising said cross-coupled pair.