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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 |
| 7316542 | Fluid level control system A control system governs fluid level in a well system including a pump positioned downhole for pumping fluid upward through a tubular, a rod positioned within the tubular for driving the pump, a prime mover, and a pumpjack to transmit power from the prime mover to t... | 01/08/2008 |
| 7314349 | Fluid level control system for progressive cavity pump A control system controls a progressive cavity pump driven by a rod. The rod is powered by a prime mover, such as a variable speed drive. A proximity sensor outputs signals responsive to rotational positioning of the rod. A controller receives the signals and comput... | 01/01/2008 |
| 6409476 | Pumpjack dynamometer and method A dynamometer readout (42, 46) and method is disclosed for obtaining dynamometer information (110) related to pumpjacks (10). For this purpose, a change of pivotal direction of the walking beam (18) may be detected by processor (82) utilizing an encoder c... | 06/25/2002 |
| 6315523 | Electrically isolated pump-off controller Electrical isolation method and assembly that protects a pump-off controller 31 as used for controlling the pumping of a subterranean well, from lightning and transient electrical power surges by electrically isolating the pump-off controller 31, the isol... | 11/13/2001 |
