US543370A

US543370A - bltjthner

Info

Publication number: US543370A
Authority: US
Publication date: 1895-07-23
Anticipated expiration: 1912-07-23

Description

(No Model.) 2 Sheets-Sheet 1. J. BLUTHNER. RBPEATING AGTION FOR GRAND-HANDS.

Patented July 23, 1895.

2 R E N H T U L B m (No Model.)

REPEATING ACTION FOR GRAND PIANOS.

Patented July 23,1895.

UNITED} STATES PATENT nron.

JULIUS BLIITHNER, OF LEIPSIC, GERMANY.

REPEATlNG-ACTION FOR GRANlj PIANOS.

SPECIFICATION forming part Of Letters Patent No. 543,370, dated July 23, 1895.

Application filed March 7, 1895- Serial No. 540,835. (No model.)

To all whom it may concern:

Be it known that I,JULIUs BLi'ITHNER, of Leipsic, in the Kingdom of Saxony, Germany, have invented a new and useful Improvement in Repeating-Actions for Grand Pianos, of which the following is a specification.

This invention relates to a repeating-action for grand pianos, which is designed to lessen the strain on the rocker by means of alever that catches and supports the abstract. In this way the abstract, and consequently the hammer-stroke, may be delicately adjusted with particular reference to the individual tones.

In the accompanying drawings, Figure l is an elevation of my improved action, showing the key raised. Fig. 2 is an end view thereof; Fig. 3, a plan thereof; Fig. 4, an elevation showing the position of the parts when the hammer strikes the string; Fig. 5, an elevation showing the position of the parts at the fall of the hammer. Figs. 6 and 7 are elevations of modifications.

The letter A represents the abstract of a grand action provided with the noses at b at opposite sides. jack a, pivoted to the rocker m. The nose I) is engaged by the free end (1 of a divided lever B, secured to a rail 0 and acted upon by The nose at is engaged by the 1 an extent that the light touch necessary for repeating may be effectively practiced.

The lever B will catch the abstract during the descent of the latter and support it yieldingly by means of the spring f, which should be adjusted according to the size or weight of the hammer. By thus intercepting the abstract, and consequently the hammer, the jack will always be brought positively and quickly under its nose (1 and the hammer will by the button it be always held at the proper distance from the string. Moreover, the key is greatly relieved, a graceful touch is invited, and a proper regulation of all the parts may be easily efiected.

In Fig. 6 the lever B is shown to be pivoted to the arm D of the rocker m. In Fig. 7 it is also pivoted to such arm D and is provided with an extension is that carries a regulatingbutton h. This button engages the key and replaces the button h. The springf' is in this modification secured to the lever B itself and is regulated by an adj usting-screw g, likewise carried by such lever.

What I claim is The combination of an abstract having a pair of noses with a jack engaging one of said noses, a lever engaging the other nose, an anjustable spring for supporting the lever and a regulating button for limiting the play of the lever, substantially as specified.

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

JULIUS BLI ITHNER. Witnesses:

MAX 'MATTHAI, Orro DOEDERLEIN.