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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 4363246 | Multi worm-rack apparatus A carriage drive system for a metal working machine wherein the carriage supports the metal working tool. The carriage drive comprises a worm gear rotatably engaged with a rack arrangement, driven by a motor and gear box on the carriage. The rack arrangem... | 12/14/1982 |
| 4361308 | Valve actuator A valve operator utilizes a disconnectable worm gear arrangement to drive a valve spindle. An hand crank may be used to disengage the power-driven worm gear arrangement and to manually drive the valve spindle, if necessary, by pivoting a bracket holding t... | 11/30/1982 |
| 4114132 | Worm gear potentiometer ratchet system A lead screw type control for a miniature worm gear actuated potentiometer having a rotor with a main drive spur gear and a ratcheting drive rack gear. The invention contemplates rack gear teeth formed with a gentle ramp opposed to a more acute ramp such ... | 09/12/1978 |
