Tuning machine with reduced backlash and end play

Details Tuning machine with reduced backlash and end play Tuning machine with reduced backlash and end play

Filed on

1989-11-22

Date issued

1990-12-04

Examiner

Franklin, Lawrence R.

Patent Class

Music

SubClass

Instruments

SubSubClass

Stringed

Other Related Categories

G10D 314

Type

Patent

Status

active

Patent number

049744810

Description

ABSTRACT:
A tuning machine is provided with an adjustable bearing surface for eliminating mesh backlash and end play which gradually develope between the worm and worm gear over years of service. The worm is held against the worm gear by a pair of saddle bearings formed on a sliding retainer. When the bearing wear develops an unacceptable backlash or end play develops, the retainer is loosened and repositioned closer to the worm. In the new position the worm is returned to its original intimate engagement with the worm gear. Simultaneously, the worm, is axially centered due to opposed bevel surfaces on the worm and saddle bearings. The new worm to worm gear mesh is free of backlash and endplay.

REFERENCES:
patent: 310590 (1885-01-01), Hyde
patent: 358764 (1887-03-01), White
patent: 682925 (1901-09-01), Gerecke
patent: 3496825 (1970-02-01), Wustl

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