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| Number | Title | Issue Date |
| 6203458 | Speed adjusting device for a drill press A speed adjusting device for a drill press includes a first variable pulley mounted to the motor shaft and a second variable pulley mounted to the output shaft with a belt connected between the two variable pulleys. A pressing member is mounted to the sec... | 03/20/2001 |
| 3982442 | Precision shaft regulator mechanism A mechanism for the precisional turning of a threaded shaft or leadscrew wherein the turning of a hand knob is used to precisionally regulate the amount of turning of the shaft. By the hand turning of a drive knob, a pair of ring drive keys are made to mo... | 09/28/1976 |
