US540910A

US540910A - Piano-key

Info

Publication number: US540910A
Authority: US
Publication date: 1895-06-11
Anticipated expiration: 1912-06-11

Description

H. FLYNN. PIANO KEY.

(No Model.)

No. 540,910. Patented June 11, 1895;

Quinn W07 M Z; M F 7 y n 6 aw UNITED STATES PATENT OFFICE.

HENRY FLYNN, OF PHILADELPHIA, PENNSYLVANIA.

PIANO-KEY.

SPECIFICATION forming part of Letters Patent No. 540,910, dated June 11, 1895.

Appli i n filed February 6, 1895. Serial No. 537,490- (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY FLYNN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Piano-Actions, of which the following is a specification.

The invention relates to improvements in piano actions. The nature thereof consists of an attachment for the keys, by the adjust ment of which keys are permitted to have the desired freedom, and at the same time prevented from rattling, substantially as hereinafter more fully disclosed and specifically pointed out in the claim.

In the accompanying drawings, forming part of this specification, similar letters of reference indicate corresponding partsin the several views.

Figure 1 is a vertical sectional view of a piano-action, showing one embodiment of the invention applied. Fig. 2 is a fragmentary view in detail of the invention constituting an antirattling attachment or key-pin adjuster. Fi 3 is a plan view thereof, and Fig. 4 is a View in perspective showing the manner in which the attachment is adjusted.

In the drawings, A, represents the jack of a piano action, which is spring seated upon the rocker a, in the usual manner, its upper end engagingthe cushioned heel of the hammer a In piano actions where undue friction is permitted between the upper end of the jack and the leather of the hammer-heel rapid wear of the cushion or leather takes place and consequently dissatisfaction in the use of theinstruinent.

B, represents an anti-friction roller, which is rotatably mounted in the upper end of the jack, to engage the cushioned heel of the hammer. This roller, revolving readily in its bearings, serves to relieve the engaging surfaces and particularly the leather cushion, of friction and the resulting Wear, and thereby lengthens the life of the instrument.

0, represents the key pin regulator, comprising an approximately U-shaped piece of wood or metal, which is secured to the keys by screws, so as to straddle the pin upon which the key rocks. In openings at or near the extremity of the legs of the U -shaped piece, a right and left hand screw is placed, and provided with a central enlargement, which may be of any polygonal cross section or provided with a series of openings or sockets, to afford a wrench hold, whereby the screw may be turned, to open or close the eX- tremities of the U-shaped piece and thereby give the desired action to the key.

Having thus fully described my invention, what I claim is In a piano action, the combination, with the key and its rocker-pin, of the approximately U-shaped regulator secured to said key and arranged astride of said rocker-pin, and the adjusting screw, having a right hand, and a left hand, screw thread engaging the arms of said regulator respectively, and a central lever or wrench actuated enlargement between said arms, substantially as set forth.

In testimony whereof I have hereunto af- Witnesses W. H. PUMPHREY, HARRY HOLGATE.