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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 4024379 | Binary system for magnetic card actuation for laundry machines A control system is described for activating a machine using magnetic signals encoded on a magnetic card, tape or equivalent member. The magnetic signals are pulse-width-modulated and, in one embodiment, also sawtooth-modulated. A means is provided which ... | 05/17/1977 |
| 4012785 | Magnetic recording playback circuit A playback circuit for use with a magnetic recording transducer, in a magnetic recording apparatus, the transducer developing an alternating current readback signal having alternating positive and negative peaks, the playback circuit comprising a differen... | 03/15/1977 |
| 4009490 | PLO phase detector and corrector Apparatus in a high-density disk storage controller for qualitatively testing circuits recovering self-clocking data, on-line and independently of any storage device. The ability of the data recovery apparatus, which is designed with broad-tolerance circu... | 02/22/1977 |
| 4008488 | Magnetic recording data decoding system For use with a magnetic data recording having one or more data tracks and a clock track, a decoding system for providing strobe pulses derived from the clock track in intended phase relationship with the decoded data. A measure of the clock pulse period i... | 02/15/1977 |
| 4005479 | Phase locked circuits A phase locked circuit according to the present invention includes means for multiplying a signal to be phase locked by an integer N. A resettable divide counter divides the multiplied signal by N for return to a phase comparator. Reset means operates the... | 01/25/1977 |
| 4005477 | Phase equalized readback apparatus and methods A magnetic recorder employs a feedback phase equalizer for adjusting the readback signal to enhance detection capability. Phase errors are measured and used as criteria for dynamically and adaptively adjusting phase compensation of the read-back signal. I... | 01/25/1977 |
| 4003085 | Self-clocking, error correcting low bandwidth digital recording system Circuit for electrically recording digital data by identifying the beginning of each cell boundary with a pulse and recording an intercell transition for one binary value and no transition for the other binary value.... | 01/11/1977 |
| 4003086 | Dynamic loop gain alteration for data retrieval A method and apparatus for recovering data stored on a magnetic medium which includes a variable frequency oscillator and a variable frequency oscillator feedback control loop therefor as a part of the data read circuitry, and which includes means for att... | 01/11/1977 |
| 4001884 | Apparatus and method for recording and reproducing digital-data A series of digital words are demultiplexed into two groups and recorded on parallel tracks of a magnetic tape. The digital information is phase encoded upon the two tape channels and during playback the magnetic flux reversals on each channel are separat... | 01/04/1977 |
| 3987490 | Rotating read/write system for NRZI data A rotating head magnetic tape unit having a fixed stator and a rotating rotor is disclosed. A plurality of transformers are positioned between the rotor and the stator so as to establish an interface for the transmission of electrical signals. Circuit mea... | 10/19/1976 |
| 3982277 | Timing-error compensation for low-speed tape systems There is disclosed a technique for compensating timing errors in low-speed tape systems, such as a system in which ECG signals are recorded on a tape moving as slow as 0.08 inches per second. Clock pulses are recorded on the tape together with the signal ... | 09/21/1976 |
| 3979771 | Magnetic tape phase encoded data read circuit This digital circuit generates a window during which the data bit transitions of phase encoded data may be read from magnetic tape. This circuit contemplates a system for reading nine track tape and comprises one phase lock loop and window generator for e... | 09/07/1976 |
| 3974523 | Speed invariant decoding of digital information from a magnetic tape A method and apparatus are provided for decoding digital information stored on magnetic tape. The "zero" and "one" bits are represented respectively on the tape by "short" and "long" distances between flux transitions. Decoding is accomplished by measuri... | 08/10/1976 |
| 3967316 | Data recorder A data recorder comprises a DC motor for driving a magnetic tape, a buffer register for temporarily storing input data, a counter adapted to be counted up by a value corresponding to an amount of data stored in the buffer register, a D-A converter connect... | 06/29/1976 |
| 3962726 | Self-clocking magnetic record sensing system A system is disclosed for sensing a single moving magnetic track, to provide two distinct binary signals (clock and binary data) representative of digital information. Magnetically recorded signals in the Manchester or F/2F code format are selectively pro... | 06/08/1976 |
| 3961367 | Self-clocking, error correcting low bandwidth digital recording system Circuit and method for electrically recording digital data by identifying the beginning of each cell boundary with a pulse and recording an intercell transition for one binary value and no transition for the other binary value.... | 06/01/1976 |
| 3956736 | Disc cartridge sector formatting arrangement and record addressing system A sector formatting and record addressing scheme and associated electronic recording and detection control systems for a removable cartridge disc used in a magnetic information storage unit. Indelible sector mark and record address/format information are ... | 05/11/1976 |
| 3947878 | Self-clocking NRZ recording and reproduction system A magnetic recording and reading system wherein data is written into a magnetic medium in an NRZ code which is interrupted for the insertion of a guaranteed flux transition after each series of eight data cells. On readout, the guaranteed sync transition ... | 03/30/1976 |
| 3944940 | Versatile phase-locked loop for read data recovery A clock pulse generating system is disclosed for recovery of read data from magnetic record media comprised of a phase-locked loop for tracking data pulses. The loop employs simple digital logic gates for phase error detection, third-order filtering for t... | 03/16/1976 |
| 3938182 | Automatic character skew and spacing checking network A network is disclosed for automatically checking the skew and character spacing of digital tape drive systems to indicate out-of-tolerance conditions of those parameters. The network enables a tape drive to check its own recording accuracy as well as tha... | 02/10/1976 |
| 3938184 | Digital flutter reduction system A digital flutter reduction system which corrects for a varying time base ror in FM recordings on magnetic tape. Pulse transitions from the outputs of a reference oscillator and a reference tone on a first tape track are compared by a flip-flop whose outp... | 02/10/1976 |
| 3935592 | Recording instrument adapted for use in remote unattended locations A recording instrument for use in ocean depths and like remote locations and adapted to provide meaningful readings of temperatures and pressure, for example, at such locations over a long period of time without attendance. Analog signals from transducers... | 01/27/1976 |
| 3932894 | Magnetic record member for use with rotating head magnetic recording apparatus An elongated magnetic tape has a pair of longitudinally extending servo track areas, one of which is closer to the longitudinal center of the tape than the other. The lateral space intermediate the servo areas receives data signals, while the space betwee... | 01/13/1976 |
