US847223A - Piano-action. - Google Patents

Description

PATENTED MAR. 12

J. AMMON. PIANO AGTION.

APPLIGATION FILED JUNE 28, 1906- I INVENTOR 70k 77/ d vz/m an ATTORNEYS UNITED STATES a'rnn'r ornicn.

JOHN AMMON, or NEW YORK, N. Y.

PIANO ACTION.

Specification of Letters Patent. lfatented March 12, 1907.

Application filed June 28,1906- tl' fil N0: 323,819.

T0 at who/1t it may concern:

Be it known that I, JOHN AMMON, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved. Piano-Action, of which the following is a full, clear, and exact description.

The invention relates to upright pianos; and its object is to provide new and improved. piano-action, arranged to simplify the action by dispensing with the bridle and bridle-wires, and at the same time insuring a proper return movement of the hammers without danger of sticking of the coacting parts, and to cause a quick response of the hammers according to the touch on the keys.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a cross-section of the improvement, showing the action at rest. Fig. 2 is a like view of the same, showing a key pressed and the hammer in action and Fig. 3 is a sectional side elevation of the butt of the ham- .mer, showing more particularly the adjustment of the back-stop.

The key A of the piano-action is provided with a capstan B, engaging the lower end of the thrust-rod (J, pivotally connected with the wippen D, on which is pivoted the lower end of the jack E, engaging the hammerbutt F of the hammer F for sounding the string G. The hammer-butt F is provided with a bearing F for slidingly receiving one end of an angular or L shaped back-check H, preferably in the form of a wire terminating at its depending member in a spoon H, adapted to be engaged by the felt t on the jack E to limit the movement of the same and the throw of the hammer F. The backv check His adjustably secured in the hammerbutt F by a set-screw H which when loosened allows adjustment of the backcheck H to bring the spoon H in proper relation to the felt E on the jack E. On the bottom of the hammer-butt F is secured a pull-b ack 1, preferably in the form of a wire having a forwardly-bent member 1, adapted to be engaged by a felted shoulder E formed 011 the jack E, so that when the key A is released and the thrust-rod C moves downward then the shoulder E engages and exerts a downward pressure on the pull-back I to swing the hammer F back to the position of rest against the usual hammer-rail J. The pullback I is adjustably secured in the hammerbutt F by a set-screw F employed for securing the cap F of the hammer-butt bearing in place.

By the arrangement described a return movement of the hammer F is insured without the use of a bridle and bridle-wire heretofore mainly used, and the device for accomplishing the result is very simple and durable in construction and is not liable to get so easily out of order as the bridle and bridlewire heretofore used. The back-check arrangement shown and described is also simplified over that of the ordinary construction now used, and it is evident that when the key A is pressed and the hammer F is thrown forward then the felt E finally moves in contact with the spoon H at the time the hammer F is in contact with the string, so that a proper yielding backcheck is provided as the spoon H and the felt E come together.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. In a piano-action, the hammer provided with a butt, a bearing therein, a cap over said bearing and the set-screw for attaching the cap to the bearing, the ack for engaging the butt and provided with a shoulder, the Wippen to which the jack is pivoted said butt having openings in the front and the bottom thereof, a backcheck comprising a portion received in the front opening of the butt and an angular portion terminating in a spoon which engages the front of the jack, a set screw traversing the butt and engaging the backcheck whereby to secure it in place, and a pull-back received in the bottom opening of the butt and retained in place by the setscrew of the cap, said pull-back having a forwardly-projecting portion for engaging beneath the shoulder of the jack.

2. In a piano-action, a hammer, a jack for engaging the butt of the hammer, said jack being provided with a shoulder, the wippen to which the jack is pivoted, said butt having openings in the front and the bottom thereof, a backcheck comprising a portion received in the front opening of the butt and an angular portion terminating in a spoon which en IIO gages the front of the nek, a set-serew trawersil'ig the butt and engaging the backl cheek whereby to secure it 111 piiLCL, and a pull-backreceived in the bottom opening,

and means for securing said. pull-bank in.

piaeefsaid. pull-back having a forward ly-pro- JOCtlllg portion for cngaglng heneath the shoulder of the 12L0k.

E in testimony whereof l have signed my two subscribing Witnesses.

J )HN AM M ON.

\Vitnesses TnEo. G. lilOS'lER, i EVERARD B. MARSHALL.

name to this specification .in the presence of i0

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