摘要:
The embodiment of the invention disclosed herein is directed to a solid state monetary accumulator, credit storage, and selector logic circuit which includes a plurality of flip-flop memory circuits for registering information corresponding to the value of coins inserted into a coin receiving mechanism, and for totaling the accumulated value of such coin accumulation to a predetermined maximum amount. Selector memory circuits are incorporated to enable a number of selections from a vending machine, such as a tape player juke box, so that selections can be made corresponding to the total value of coins inserted. Each of the flip-flop memory circuits is formed by a pair of crosscoupled logic circuits of the NOR type and have capacitors connected between the output terminals thereof and ground potential.
摘要:
Vending selections are identified by a character format. Selections are chosen by sequentially actuating switches representing the characters. The characters of the selection identifying format are coded and stored until the entire format has been coded and stored, at which time the coded format is transmitted for subsequent reception, storage and decoding. Integrated circuitry is utilized.
摘要:
In a computer a memory system is provided which comprises a plurality of rotating disc type magnetic memory elements mounted upon a motor driven shaft. The magnetic discs are designed to store information in the form of magnetic bits on two sides. Faulty areas are located on the discs and bypassed by switching to another disc on a sector basis to ensure computer reliability. The disc memory elements receive information from a plurality of read-write heads which during normal operation are in flying association with the discs. For each memory disc, there is a yoke assembly which includes a plurality of read-write heads spring connected to a yoke which is supported over each magnetic memory disc. The computer memory system includes an ultrasonic collision detector to detect during operation damaging hits or collisions between a memory disc and an aerodynamically unstable head. For disc-head collision detection, a piezoelectric ceramic element is attached to each disc yoke to detect vibrations and, in particular, those occurring when any element of a head comes in contact with a memory disc. The vibrating frequencies of the piezoelectric ceramics are converted to electrical signals, amplified and passed through Tschebyscheff filters to eliminate normal operating frequencies detected by the ceramics and to pass memory element damaging frequencies to a second amplifier. The second amplifier has two outputs - one output to an analog multiplexer to provide on an oscilloscope a look at each memory disc operating to determine the nature of the collision, and a second output to a detector where the signal inputs are compared and an indicator lamp actuated to indicate which memory element is in contact with the head and to actuate a relay to open a master switch to shut down the computer memory system.