Music – Instruments – Stringed
Patent
1990-04-27
1991-09-03
Brown, Brian W.
Music
Instruments
Stringed
G10D 314
Patent
active
050442473
ABSTRACT:
A string tension adjusting mechanism for a steel guitar. The adjusting mechanism consists of three basic parts, a bridge member, over which a guitar string is mounted and to which tension is applied to a desired pitch. A raising lever member, actuated by a pull rod, turns the pivotably-mounted bridge member clockwise to increase the tension and incease the pitch. A lowering lever member, again actuated by a pull rod, causes the bridge member to pivot in a counterclockwise direction, thus relieving the tension on the string and lowering the pitch. One of the lever members is attached to the bridge member, while both of the lever members are pivoted together. One of the lever members contains a large hole and a spacing device is mounted therein, at the point of pivot, to maintain a free space between the two lever members and between the lever member and the bridge. This allows for free and easy raising or lowering of the pitch of a particular string while the guitar is being played and minimizes drag and friction. Maintaining a free space between the lever members and between the lever members and the bridge member produces a pure tone quality. The tone quality is further enhanced by the provision of a large V-shaped notch in the leading edge of the lowering lever.
REFERENCES:
patent: 2973682 (1961-03-01), Fender
patent: 3014395 (1961-12-01), Blair
patent: 3352188 (1978-11-01), Fender
patent: 4080864 (1978-03-01), Jackson
patent: 4157050 (1979-06-01), Lashley
patent: 4175467 (1979-11-01), Lashley
patent: 4342249 (1982-08-01), McCormick et al.
Brown Brian W.
Price William R.
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