US537482A - Piano-action - Google Patents

Description

J. PERRY. BESTAVAILABLE COP.

PIANO ACTION.

(No Model.)

Patentd Apr. 16, 1895,

BEST AVAILABLE COP.

UNI TED STnT-ns -"PATnNT OFFICE.

JOSEPH R. PERRY, on WILKES-BARRE, PENNSYLVANIA.

PIANO-ACTION.

SPECIFICATION forming part of Letters Iatent No. 537,482, dated April 16, 1895.

. Application filed December 1'. 1894. serial No. 530,623. in. model.)

To all whom it may concern:

Be it known that I, JOSEPH R. PERRY, a citizen of the United States, residing at Wilkes-' free stroke with lightness anda perfect repetition. c

It consists of an improved method of constructing the hammer butt, so as to be able to tighten the pivots,

when from long use they become loose.

It'a'lso consists of a new and flexible link pivot connecting the jack and actuating mechanism.

It also consists of a rocker arm having a suitable post and regulating screws attached to the actuating lever in such manner that the unlocking device can be adjusted to a nicety by means of said rocker arm, and without interfering with the actuating lever, or changing the dip of the keys.

It also consists of a round or other shaped post and regulating screw or button, to be ad justed by means of said rocker arm and attached thereto.

It consists also of a double back check, made by the screw 0, and a longitudinal strip on the bottom face edge of the action rail for holding or back checking the hammer, all of which is fully described and shown by the several figures in the accompanying drawings, in which- FigureI is a. side elevation showing all the working parts. Fig. II is a bottom view of the improved flange to be secured to and forming part of a. hammer butt, also showing connection'with the damper flange. Fig. III is an edge or side view ofthe short link as it is attached to the jack. Fig. 1V is a side or edge view showing links as well as jack (3, and padded seats attached to jack toassist in back checking the links, all of which are fully described in the following'specification.

In Fig.1, A is the hammer butt which is constructed as follows: The solid part below is routed out as far as the dotted lines aca: and the lower edge has two saw cuts, made transversely at the points shown by the pivots which hold the flange B and the jack 0. I then construct a flange D having a routing at both ends, one end to hold flange B, and the other end to hold the jack 0 to the hammer butt, having a central hole to admit of a screw, and one or more holes for steady pins. This flange is packed and held against the under side of the hammer butt by means of a screw and steady pins driven into the butt. The steady pins, of metal, are shown by the dotted lines, which pins pass through the flange and are driven into the hammer butt. Fig. II shows the same hammer butt from the bottom side, with the flange B, flange D holding B and jack 0 together.

The flange B in Fig. I is secured to the action rail E in the usual manner.

To the bottom edge of the action rail E and by means of a flange I secure the actuating lever G to which the lower pitman H is fastened by means of a pin, and extends to the keys (not shown). Upon this actuating arm G, I place a rocker arm I to which is secured a wooden or metal post and regulating screw or brass button K, of any suitable size shape.

Preferably a round wooden post is here shown. This post Jis glued into the rocker arm I, or if metal, may be screwed into the same. Upon the upper end of the post J I place a brass button K or regulating screw, to aid in wearing and to prevent noise, or if metal it should be made spoon shaped. At or near to each end of thearm I a screw passes into the actuating lever G, having the holes through arm I made large at the under side to allow the arm to be regulated by means of the screws, which regulating consists in placing the post J the right distance from the jack 0, so as to throw the said post J against the jack G and thereby unlock it at the proper time. When so adjusted and regulated the rocker arm will remain rigid. A transverse'pin is placed upon the upper side of G, and rests in a small saw cut made into both lever G and arm I. It might be shaped into a V, or the rocker arm I might have a tenon upon it, and be put into a routing of show the routing andthe position theseli-nks will assume in working, the-dotted lines showing them when a stroke has been made, and

the solidlines when at rest.--

Instead of the short link orli'nks-Lthelinsk and jack may be. made as shown by Fig. III, which jack. is-sbttedfrom. thebottnmend and has atransverse screw placed near. the bottom. Theshortlink L. my hemadiehyclethin g the same around the link; and placing endsthereet'into the slot of thejaclcO; Then by gluing the same and drawingthe: screw shown, it will pinch cloth or other matea. 'flexible joint. The lower end of the link should then be pivoted. to thcarml as usual. These links arealso shown on Fig. IV aswcll as the edge of jack G and other parts.

Like figures and letters rote: to similarpartsin each View.

In Fig.1 the lower end at jack Crests upon a packed seat on therocker arm I and: is held against a cushion mglued to the: post J5, by means of a spiral spring N attached to action. rail Eand inner ofi'jack G. In

purpose of acting asa back cheek: to hold. the: hammer after the stroke. is: made, the jack 6 being forced against it by means of the post. J and held while the piano key is. pressed down. In orderto the 0 to hold seats, u, u, as shown in Fig. IV and the one on the upper part. oi jack (1- is hinged tov the inside of the jack and isby means On the. lower end of the action rail E,I place; a longitudinal strip P, which is fastened tothe bottomfaeeof said action rail E by means. of screws placed at intervals to support; it, and when properly regulated as tov from rail E the rear side is blocked. out and the screws tightened to hold the same firmly in place. This blocking is seen atg which. longitudinal strip: will act as an additional. back check by holding the lower end; of. jack 0 by pressure of short link L- against the same; that is holding the jack against up per screw 0, and also againstthe strip 1?.

The operation of theaboN-e described action is as follows, to wit: When the. piano key is pressed down the pitman istorced up, which causes actuating arm G tomove the rocker arm I having post J and links L and jack G BEST AVAILABLE COP".

attached to hammer butt A causingthe hani mer to. strike the string, but in doing so, when the hammer comes close to the said string, the various parts will have arrived at an alignment, and the link L and jack G will be forced over saidaligument and allowed to fall against the hack check serewO and the longitudinal I check strip]? and be firmly held in position while the finger presses the key, but when 5 the key is' allowed to move, the spring N will react against the jack C and cause all the parts to assume-their original places ready foranother stroke. This can be repeated indefinitely inplaying the piano.

Having thus fully and clearly described my .invention, so that any one skilled in the art 1 to which it belongs could construct and use i thesamewhat-I. claim asnew and useful, and .for which I desire to obtain a patent of the United; States, is:-

ing it withany-good flexible materials, pnss- I. The. rocker arm having a post .I and regfulating or adjusting screws 1. and 2, said 1 rocker arm and post. thereby attached to the actuating lever G, in the manner and for the purposes specified. rials and hold it ready or use, thus making 2. The short link. or links L attached directly to the adjustable rocker arm I said 5 rocker am having post J, said short link attached to jack 0, and said jack 0 in turn at- 1 tacked to the hammerbutt, A, in the manner 3 and for thepm'posenamed.

3. Aliukhhaviug a metal pivot at one end,

I and covered with flexible materials, which ex- I tend at the-other end of the link into the jack Os forming a. flexible joint between said link and the jack in the manner and form specitied. the rail E,I placearcgulating screw 0, torthe 4.. Thelower back check P, arranged to stop thejack Qand, flexibly pivotedlink L, in com i bination with the upper check screw 0 the rodrerarm I having a post J, and regulating screws 1 and. 2, in the; manner and for the pur pose named.

the hammer easily form a padded sector 5.. The hammer butt A routed from the under side, transverse pins passing through the sam'e,.said pins-snitablypacked, having a separate flange D packed and held to the butt A of" a small screw passing through thejaclr C.

by means oi a. screw from the under side, and having steady pins driven into the hammer butt, which pins pass through flange D, sub- I stantially as arranged and for the purposes specified.

6. The. hammer butt A routed out from its under surface to admit'of the flange B and jack C, having transverse saw cuts to admit with av rocker'arm. I having a post- J, and regulating screws attiachingthe same to actuating arm G in the 'manner and for the purposes I specified 7.. A'link having a metal pivot at its lower end and covered with flexible materials which extend at the upper end into a jack, forming ICC Ilb

a flexible joint between said ack link and the short 1ink,'a11 in combination with a rocker arm having regulating screws and a post J,

the said rocker arm secured to the actuating arm G in the manner and form specified.

8. The short link having a metal pivot at its lower end and covered with flexible materials extending into and secured to jack 0, in combination, with a hammer butt A; routed out upon its under side, having transverse pins and a flange, routed out at both ends said flange having holes for steady pins and BEST AVAILABLE COP.

a screw to secure the said jack and flange B, in the manner and for the purposes named. 9. The rocker'arm I having post J and regulating screws 1 and 2, resting upon a. pin of metal, said pin being held by transverse grooves cut into rocker bottom and actuating arm G in the manner and for the purpose specified.

JOSEPH R. PERRY. Witnesses:

JOHN N. DAVISON, JOHN C. JEFFRIES.

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