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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 |
| 7715167 | Apparatus and method for controlling excitation frequency of magnetostrictive transducer Apparatus and method for controlling the frequency of the current in the excitation coil of the handpiece of a dental magnetostrictive ultrasonic scaling unit, or similar transducer. A microprocessor continually samples a predetermined function of the current throug... | 05/11/2010 |
| 7403368 | Devices and methods for detecting operational failures of relays An uninterruptible power supply (UPS) includes a power conversion circuit and a relay. The relay is configured to couple and decouple a power source to and from an input of the power conversion circuit. The control circuit is operative to apply a coil current to the... | 07/22/2008 |
| 7161780 | Circuit interrupting device with single throw, double mode button for test-reset function A typical duplex GFCI receptacles has two buttons, a test button that, when pressed, shuts off power to the receptacle and down stream devices, and a reset button that, when pressed, restores power to the GFCI and down stream devices. Generally, the test button is p... | 01/09/2007 |
| 6806806 | Polymer fuse and filter apparatus A fuse and filter arrangement having a polymer fuse apparatus that provides bypass fuse protection. A polymer bypass fuse includes of an electrical conductor wherein a portion of the conductor is surrounded by an internal electrode, which is then surrounded by a lay... | 10/19/2004 |
| 6014301 | Fault indicator providing contact closure on fault detection A fault indicator for detecting the occurrence of a fault current in a monitored conductor includes a rotatably mounted indicator flag. The flag is positioned in either a reset indicating or a fault indicating state by a magnetic pole piece, which is magn... | 01/11/2000 |
| 5835331 | Half-wave drive circuit for meter disconnect switch A very low cost method of driving the coil of a meter disconnect switch utilizes the 60 Hz signals from an existing power supply rectifier to generate properly phased gate drive signals to SCRS, with only one stage of isolation.... | 11/10/1998 |
| 5507658 | Ejector mechanism for memory card connector with variably positionable pushing block means A memory card connector (10) includes an insulative housing (20) having a plurality of cavities (26) extending therethrough in a front-to-end direction for reception of a corresponding number of contacts therein. Ejection mechanism includes a pivotal leve... | 04/16/1996 |
| 4006309 | Voice operated relay A voice operated relay system is disclosed which includes signal processing ircuitry for receiving and discriminating with respect to human speech signals and for actuating a relay in response thereto. A power supply test is also included, as well as circu... | 02/01/1977 |
| 3992655 | Electronic meter signalling device This electronic meter signalling device provides a means for converting a conventional meter or gauge into an electronic switch in which a number of electronic outputs indicative of conditions of the meter or gauge are provided. The meter signalling devic... | 11/16/1976 |
