US654914A - Pianoforte-hammer. - Google Patents

Description

No. 654,9I4. Patented .luly 3|; |900.

C. M. MCUUILKIN.

PIANOFUBTE HAMMER.

(Appum'm med rob. 19, 1900;)

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SPECIFICATION forming part of Letters Patent No. 654,914, dated July 31, 1900. Application filed February' I9, 1900. Serial No. 5 ,684. (No model.)

To all whom it may concern: y

Be it known that I, CHARLES MERRY Mc- QUILKIN, a subject of the Queen of Great Britain, and a resident of Denison, via Heyfield, Gippsland, in the Colony of Victoria, have invented certain new and useful Improvements in Pianoforte-Hammers, of which the following is a specification.

In pianoforte-hammers commonly in use the felt-covered end which strikes the wires to produce the note becomes hardened and dead, and the tone of the note is thus rendered defective. I provide at the end of the hammer a resilient cushion of peculiar construction in which this objection is obviated.

In describing the invention I will make reference to the accompanying sheet ofdrawings, in'which- Figure l shows a side view of a hammer to which my invention has been applied; Fig. 2, a plan of same; Fig. 3, a longitudinal vertical section of same. Fig. I shows an end View of hammer with felt removed, yand Fig. 5 a corresponding side sectional view. In these views, Figs. 4 and 5, an eXtra strip, to be hereinafter described, is shown. Y

a represents the rigid arm or head ofanpianoforte, in the end of which I form a recess b, and in such recess I set a ball c of rubber. This ball is preferably of the form of a hollow sphere, spheroid, or the like and is set in the recess to a depth of about one-third the diameter of the ball and glued or solutioned into position. A strip of rubber CZ passes around the said ball and has its ends secured to the top and bottom faces of the' hammer, and upon the said band are mounted strips of felt e f, secured to the top and bottom faces of the hammer. The felting is preferably of increased thickness at end of hammer, and for this purpose it may be specially built up by means of insertion-strips. The cushioning material ef may correspond with and be secured in the manner commonlyknown' and in use at the present time upon pianofortehammers. The employment of the elastic ball will maintain thecushion in a live condition. l 1

The band 'd aforesaid, which holds the ball in position, is preferably formed offrubber upon a base of textile fabric, the fabric side being placed next to the wood of the hammer and receiving'the glue or solution by which it is affixed in position. The band is, how- In thus seever, not solutioned to the ball.

curing the ball in its recess and also in se- A curing the feltin g to the rubber band a guttapercha cement may be used instead of glue.

If desired, an extra cross-band g, Figs. 4t and 5, might be employed to pass over the ball and be secured to the sides of a hammer. In this case no recess for the ball would be required; but this in practice would not be employed if the recess were employed and formed sufficiently deep to hold the ball in place.

In applying my invention to a pianoforte the sizes of the spheres or the like would vary upon the different hammers. Thus the ham- 'mer at the extreme bass end of the piano ion ef.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to bev performed, I declare that what I claim is 1. A pianoforte-hammer having an elastic hollow ball seated on the rigid portion of the hammer, and bearing against the inner side of the cushioning material of the hammer.

2. A pianoforte-hammer having a recess at one end in which is placed a hollow elastic ball said ball being held in position by an elastic strip solutioned to the wood of hammer but not to the ball, and having coverings of felt orlike material substantially as and for the purposes described.

3. A pianoforte-hammer having a hollow elastic ball placed at one end and held in position by elastic strips as d and g-solutioned to hammer-and having coverings of felt or like material substantially as and for the purposes described. l y

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. Y Y

CHARLES MERRY MCQUILKIN.

Witnesses:

A. HARKER, A. O. SACHSE.'

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