US247363A - Piano-tuning pin - Google Patents

Description

UNITED STATES PATENT OFFICE.

FRANK E. KING, OF WES'I.` LEBANON, NEW HAMPSHIRE.

PIANO-TUNING PlN.

SPECIFICATION forming part of Letters Patent No. 247,363, dated September 20, 1881.

Application filed January 3, 1881.

.To all whom it may concern Be it known that I, FRANK E. KING; of West Labanon, in the county of Grafton and State of New Hampshire, have invented certain new and useful Improvements in Piano- TuningPins, of which the followingis a speciiication.

The object of my invention is to provide a tuning-pin for pianos, which shall not become loose and move under the force ofthe tension of the string when repeatedly struck upon-by the hammer when in use, but that such tention as may be required in turning the said string shall remain iixed and positive, thus avoidingthe frequent necessity of retuning, as is common with those heretofore constructed and now in general use; and it consists in the construction, combination, and arrangement of the several parts of the device, as hereinafter more fully described and set forth.

Figure l represents a perspective view of my invention. Fig. 2 represents a vertical section of the same.

A represents the wrest plank or frame of a piano provided with a suitable series of holes to correspond with the strings B, as usual. Into these holes are securely driven the vertical studs or'pins E, provided with a horizontal hole, G, arranged in the direction of, the string D, one end ot' which is secured in the usual manner, and the opposite adjustable end passed through a hole, H, formed in the downward or upward projecting1 end of the adjustable string-holder F, and the slack of the said string B wound around such projecting end portion, the opposite screw-threaded portion having upon its upper surface a longitudinal groove, P, and adapted to tit loosely within the horizontal hole C of the stud or pin E when placed therein, and provided with a suitable screw-nut, N, which may be turned with a wrench or key, so as to tune the said string D, by drawing the said holder F through the (No model.)

hole in the stud or pin E, against which the said screw-threaded tuning-nut has a bearing at its opposite side. When the said string D is correctly tuned the set-screw L, fitted into a corresponding hole formed in the top end of the stud or pin E, and having a bearing upon the check-bolt K, the upper end of which is provided with a projecting pintle or steadyingpin, J, which lits into a corresponding hol-e in theJ lower end ofthe said set-screw L, being turned or screwed inward,forces the lower end of the said check-bolt Ktirmly against the bottom ofthe groove P, formed in the string-holder F, so as to prevent vibratory movement of the saine through its connections with the said vibrating string D.

Having thus described my invention, what I claim ism l. A piano-tuning pin consisting of the vertical stationary stud or pin E, having a horizon'- tal hole, G, provided with the adjustable string, holder F, having a downward or upward projecting end adapted to hold the string, and provided with a longitudinal groove, P, to receive the end of the check-bolt K, held therein by the set-screw L, the said string-holder F being adjusted by means ot' the screw-threaded nut N so as to tune the string D, substantially as described` 2. The combination, with the wrest-plank, of

the stationary vertical stud or pin E, having

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