Music – Instruments – Stringed
Patent
1992-06-10
1995-04-11
Gellner, Michael L.
Music
Instruments
Stringed
84314R, G10D 304
Patent
active
054047838
ABSTRACT:
A fully adjustable acoustic guitar bridge is claimed that allows the strings (nylon or steel) of an acoustic guitar to be separately and continuously intonated accurately and easily whenever necessary. The bridge system employs a minimum of alterations to the traditional non-adjustable acoustic guitar bridge to retain the acoustic qualities of the instrument. Recessed, rear-loaded cap screws utilize the forward pull of the guitar strings to stabilize the adjustable saddles. A threaded saddle capture on each saddle provides stability, continuous threading capability, and the freedom to use acoustically resonant materials (bone, phenolic, composites, etc.) for saddles. These features eliminate the need for springs or other fasteners, which would have a negative effect on the acoustic guitar's tone and sustain. A rosewood shim is employed on acoustic/electric guitars over the internal bridge pickup. The vibration of the saddles on the shim is transmitted to the pickup regardless if the saddles are located directly over the pickup or not. The system has been tested and is compatible with most bridge pickup systems that are currently on the market. The Rule of 3.3%, which cuts 3/64" off of a guitar neck fingerboard (for a neck with a scale length of 25.5") compensates for the various string tensions along the neck to allow for any guitar, with an adjustable bridge and properly located frets, to achieve accurate intonation at all fret positions.
REFERENCES:
patent: D265835 (1982-08-01), Rickard
patent: 3599524 (1969-12-01), Jones
patent: 4236433 (1980-12-01), Holland
patent: 4911055 (1990-03-01), Cipriani
patent: 4951543 (1990-08-01), Cipriani
patent: 5052260 (1991-10-01), Cipriani
patent: 5063818 (1991-11-01), Salazer
Cipriani Bridge Systems Brochure .COPYRGT.1992.
Back Gregory T.
Feiten Howard B.
Gellner Michael L.
Stanzione P.
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