- Rockin’ Patent®: US Patent No. 5,107,740
- Filed: 9 November 1990
- In the name of: Arnfred R. Strathmann (inventor)
- Title: Flute Mouthpiece With Adjustable Core Gap
- What’s claimed: “Flute mouthpiece comprising a mouthpiece body provided with a longitudinal bore, a core insertable into the longitudinal bore at one end of the mouthpiece body; a substantially rectangular cut-out formed in the upper side of the mouthpiece body in the region of the core end disposed in the interior of the mouthpiece, with the transverse edge of the rectangular cut-out remote from the core being formed as a lip and merging into an inclined surface which outwardly broadens the opening forming the cut-out, and wherein the upper surface of the core and the wall surface of the longitudinal bore adjacent to this upper surface are spaced apart from one another and form a core gap, and wherein the core gap has a blowing-in opening at its one end and a blowing-out opening at its other end pointing towards the lip, characterized in that the core (2) has a section (21) which includes at least a part of the upper surface (22), which is pivotable about an axis (29) disposed at its end (24) directed towards the blowing-in opening (30 and extending horizontally and transverse to the longitudinal bore, and which extends up to the end of the core disposed in the interior of the mouthpiece.”
- Why this patent rocks: This patent appears to relate to the adjustable block of the sound unit for models of the Mollenhauer Harmonic recorder. This consists of a ‘knurled-head screw at the back of the head joint that allows for the adjustment of the windway exit by slightly lowering or raising the block at this point’, enabling special variations in sound as a direct result of those alterations to the size of the windway exit.
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