# US 4,398,443 A · Precision tuning pin for pianos

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,398,443 A
- Document ID: US4398443A
- Status: Granted
- Kind: A
- Application number: 06/380,523
- Filed: 1982-05-21
- Granted: 1983-08-16
- Earliest claimed: 1982-05-21
- Inventors: Bruce F. Kovach
- Web page: https://patentgrep.com/patent/US4398443A

## CPC

- G10C 3/10: Tuning pins; Tensioning devices
- G10C: PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS (automatic musical instruments G10F)

## Abstract

A tuning pin for pianos and like instruments being of the usual configuration except for the neck portion on which the string is wound which is reduced in diameter only on the side which the string leaves the pin thus forming a pin neck which is more elliptical than circular in shape, the reduced side of which has a less acute curve for the string to bend around and is closer to the center of axes of the pin which reduces the torsional effect of the string on the pin and subsequent slippage of the pin in the block.

## Claims

### Claim 1

A metallic tuning pin for pianos and like instruments comprising a body portion substantially the whole length of which is adapted to be placed in and held by the pin board of the instrument, a head shaped for turning the pin by a tuning hammer, a neck between said body portion and said head for the winding of the string therearound, said neck being reduced in diameter only on the side which the string leaves the pin when the string is up to pitch, thus forming a pin neck which is more elliptical than circular in shape, the said reduced side of which has a less acute surface curvature than that of the pin body, and a string hole in said neck.