US939362A - Repeating-action for grand pianos. - Google Patents

Description

1?. A. WESSEL L, H. A. NICKEL & A.-L. WESSELL.

REPEATING ACTION FOR GRAND PIANOS.

APPLICATION FILED JULY 8, 1909.

Patented Nov. 9, 1909.

UNI

STATES PATNT FFICE.

FERNANDO A. WESSELD, HENRY A. NICKEL, AND ARTHUR L. WESSELL, OF NEW YORK, N. Y., ASSIGNORS TO WESSELL, NICKEL & GROSS, OF NEW YORK, N. Y.

BEPEATING-ACTION FOR GRAND PIANOS.

Specification of Letters Patent.

Patented Nov. 9, 1909.

Application filed July 8, 1909. Serial No. 506,462.

To all whom it may concern:

Be it known that we, FERNANDO A. Wee- SELL, HENRY A. NICKEL, and ARTHUR L. VVESSELL, citizens of the United States, and residents of New York city, Manhattan, county and State of New York, have jointly invented new and useful Improvements in Repeating-Actions for Grand Pianos, of which the following is a specification.

This invention relates to an improved repeating action for grand pianos and more particularly to improved means for adj usting the tension of the repeating springs.

As the weight of the hammers in a piano action gradually diminishes toward the treble, and as the tension of the repeating springs must be adjusted to conform to the weight of their respective hammers, it is of importance that means be provided by which an ample adjustment of the springs may be efiected and that such means be readily accessible. By our invention this desirable re sult is obtained in a simple and efficient manner.

In the accompanying drawing: Figure 1 is a side view, partly in section, of a grand piano action embodying our invention; Fig. 2 a plan of the repeating lever and spring; Fig. 3 a longitudinal section on line 33, Fig. 2, and Figs. 4 and 5 are details of the repeating spring, showing its tail bent in different directions.

The action comprises a support 10, jack 11, repeating lever 12, and hammer 13, all as usual. The repeating spring 14, superposed on lever 12, is secured at its rear end to support 10 by means of a string 15 passing through a rear slot 16 of lever 12. At its forward end spring 14 is first bent downward, then coiled around a covered pin 17 that traverses a front slot 18 of lever 12, and is finally bent upward to form a tail 19 which extends beyond the upper side of such lever. Lever 12 is provided back of pin 17 with a boss 20 which is tapped for the reception of a regulating screw 21 bearing against the rear side of tail 19. The ordinary adjustment of spring 14 is effected by means of screw 21 which, when advanced against tail 19, will increase the tension of spring 14, while such tension will be reduced by the retraction of the screw. As the play of the screw in an axial direction is but limited, it is of importance that means be provided for effecting an additional adjustment of the spring. These means are furnished by the tail 19 which clears the top of boss 20 and is thus readily accessible after hammer 13 has been swung forward on its fulcrum. By bending the tail from its normal position 19 forward and into the position indicated by dotted lines 19", (Fig. 4), the tail on being released will swing backward into contact with screw 21 and thereby diminish the tension of spring 14. In like manner the tension of the spring will be increased by bending the tail from its normal position 19 backward, as indicated by dotted lines 19, (Fig. 5). After the tail has been deflected either backward or forward, in the manner described, the further delicate adjustment of the spring is effected by the regulating screw, which may be manipulated withoutraising the hammer.

"We claim: 1. In a repeating action for grand pianos, a slotted repeating lever, and a pin traversing the slot of said lever, combined with a repeating spring engaging the pin and having a bendable tail which extends above said lever, and with a regulating screw tapped into the lever and operatively engaging the tail.

2. In a repeating action for grand pianos, a slotted repeating lever having a boss, a pin traversing the slot of said lever, a repeating spring engaging the pin and having a bendable tail which extends above the lever, and a regulating screw tapped into the boss and operatively engaging the tail. FERNANDO A. VVESSELL. HENRY A. NICKEL. ARTHUR L. WESSELL. Vitnesses CHAS. Mr'jHLnNrnLs, PH1L11 MENGES.

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