Locking nut assembly for a guitar
US4579033A · kind A · utility
Inventor
Key dates
| Filing date | Jul 26, 1985 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Jul 26, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10D3/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A finger operated locking nut assembly for a stringed instrument is provided including a baseplate for separating and maintaining the strings over the fretboard, a locking block for pressing the strings against the baseplate and a cam action lock screw. The lock screw provides a first, unlocked position for allowing the strings to slide for tuning of the instrument and a second, locked position for maintaining the tune of the instrument during play. The preferred lock screw includes a threaded body to allow rough adjustment and a transverse head bifurcating a pivoting lever tab to define spaced cams. These cams provide spaced contact points across the block for even pressure and secure locking of the strings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.