US571163A

US571163A - Joseph iierrburger

Info

Publication number: US571163A
Authority: US
Publication date: 1896-11-10
Anticipated expiration: 1913-11-10

Description

(No Model.)

J. HERRBURGER.

GRAND PIANO.

Patented Nov. 10, 1896.

UNITED STATES PATENT OFFICE.

JOSEPH IIERRBURG-ER, OF PARIS, FRANCE.

GRAND PIANO.

SPECIFICATION forming part of Letters Patent No. 571,163, dated November 10, 1896.

Application filed August 15, 1896. Serial No. 602,848. (No model.)

To (LZZ whom it may concern.-

Be it known that I, JOSEPH IIERRBURGER, of Paris, France, have invented an Improved Action for Grand Pianos, of which the following is a specification.

This invention relates to an action for grand pianos which embraces various features of novelty, and has for its object to avoid friction between the repeating-lever and the hanini erbutt-regulating screw, to provide a guide for the repeating-lever, and to obtain a superior spring action for such lever and the jack.

In the accompanying drawings, Figure 1 is a side elevation of my improved action for grand pianos. Fig. 2 is a cross-section 011 line 2 2, Fig. 1.

The letter a represents the rider of a grandpiano action pivotally connected to rail a by flange a Z) is the jack; 0, the hammer-shank; d, the ha1n1ner-butt,and ethe butt-regulating screw.

The repeating-lever f is pivoted directly to the rider a, as at f, and is not made straight as heretofore, but is curved or bulged out wardly, so that its convex upper side reaches beneath thehanimer. By means of this curved shape of the lever f I obtain, 1noreover,aspace for a post h, that projects upwardly from the rider Ct between the lever and the jack. This post is provided with a screw-hole that receives the end of a regulating-screw 1', which extends through a bushed slot f of lever f and carries the punchings or washers 2" F. The screw 2' is used not only as a regulating device to adjust the position of the lever f, but it also constitutes a guide for such lever, keeping it always in a true position under the knuckle g. That is to say, the screw will prevent the lever from turning or twisting to either side either by the warping of the wood or by imperfect or worn-out centers, and thus avoids frictional contact between the jack and the inner sides of the slot f through which it passes.

j is a bent spring that engages both the lever f and the jack 1). This spring is connected at j to the lever f, thence passes along the upper side of such lever around a pinj of rider a, and thence along the upper side of the rider to the jack. Thus it will be seen that the spring is readily accessible and can be regulated with great facility. Moreover, the spring is of such agreat length that it is of superior resiliency, is not apt to strain or wear out, and that it imparts a superior elasticity to the touch.

\Vhat I claim is 1. In an action for grand pianos, the conibination of a rider with an outwardly-bulged repeating-lever pivotally connected to said rider, substantially as specified.

2. In an action for grand pianos, the combination of a rider with an outwardly-bulged and slotted repeating-lever, and with a regulating-screw that extends through said lever, substantially as specified.

In an action for grand pianos, the combination of a rider with apost projecting upwardly therefrom, a screw engaging said post, and an outwardly-bulged repeating-lever engaged by the screw, substantially as specified.

a. In an action for grand pianos, the con1- binati on of a jack an d rider with an outwardly-bulged repeating-lever pivoted to the rider, and with a bent spring engaging the re peating-lever and the jack, substantially as specified.

5. In an action for grand pianos, the combination of a jack and rider, with an outwardly-bulged repeating-lever, a regulatingscrew engaging said lever, and a spring e11- gaging both said lever and the jack substantially as specified.

JOSEPH IIERRBURGER.

\Vitnesses A. WYK, A. GERVAIS.