US245382A - Tuning-hammer - Google Patents

Description

(No Model.)

B. A. JGN-ES.

v TUNING HAMMER.

No. 245,382. Patented Aug. 9,1881.

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UNITED STATES PATENT OFFICE.

EDGAR A. JONES, OF STUBGIS, MICHIGAN, ASSIGNOR OF ONE-HALF TO WILLIAM B. THOMPSON, OF CHICAGO, ILLINOIS.

TUNING-HAMMER.

SPECIFICATION forming part of Letters Patent No. 245,382, dated August 9, 1881.

Application filed December 28, 1880.

To all whom it may concern Be it known that I, E. A. JONES, of Sturgis, in the county of St. Joseph and State of Michigan, have invented an Improvement in Tuning- I-Iammers, of which the following is a specification.

The nature of this invention relates to cer tain new and useful improvements in the construction of that class of devices employed for turning the tuning-pins of pianos and other similar instruments, and which are known in the trade as tuning-hammers.

The object of this invention is to produce a device the parts ofwhich are adjustable, so that the handle may be adjusted to such position as shall be the most convenient to the operator.

The invention consists in the peculiar construction, arrangement, and various combinations of the parts, all as more fully hereinafter set forth.

Figure 1 is a perspective view of my improved tuning-hammer. Fig. 2 is a vertical longitudinal central section of the same.

In the accompanying drawings, which form a part of this specification, A represents the stem of the tuning-hammer, one end of which is extensibly adjustable in the handle B, as in the ordinary manner. The outer end of the stem Ais enlarged at a b, and is bifurcated, as at 0. Through the outer enlargement, to, of the stem is formed a circular opening at right a11- gles to the plane of the bifurcation c.

G is a quadrant frame or plate, the rim of which is provided with a series of perforations, d, and a triangular-shaped hole, 0, at its axis, which is coincident with the holes in the end of the stem when the quadrant is placed in the bifurcation of the stem.

D is a lever, properly fulcrumed upon the stem A, as shown, and to its shorter arm is pivoted a pin, g, which passes down through proper openings in the enlargement b of the (No model.)

stem to engage with one of the series of holes, d, of the quadrant, a spring, E, being employed to compel such engagement, as shown.

F represents the head, in one end of which is formed the socket i, while the tang or stem of the head,in this instance, is triangular in crosssection, so as to fit snugly in the similarly-shaped opening 0 in the quadrant, and in which it may be secured against accidental displacement by a set-screw, 8.

By the use of a device constructed substantially as described the process of tuning is rendered much easier, quicker, and more perfect, as the handle can readily be turned or adjusted to the position most desirable to the operator, no matter at what angle the head fits the pin, enabling him to exert the required force upon the pins from about the same position of the handle, and rendering the result produced more accurate, lessening the danger of overstraining the wires of the piano, which often occurs in the use of the ordinary hammer, owing greatly to the continued change of position in which the force is applied.

I am aware that tuning-instruments have been made with radially-adjustable handles, and therefore do not broadly claim such inven tion.

What I claim as my invention is- 1. In a tuning-hammer, the forked stem A and head F, in combination with the quadrant 0, having perforations d for receiving the pin 9 on the spring-pivoted lever D, substantially as and for the purpose described.

2. In a tuning-hammer, the stem A, springlever D, and pin g, in combination with the perforated quadrant 0, adjustable vertically on the head F, substantially as described.

EDGAR A. JONES.

Witnesses:

Enwn. F. (JAsE, H. L. ANTHONY.

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