US354619A

US354619A - Chaeles batee

Info

Publication number: US354619A
Authority: US
Publication date: 1886-12-21
Anticipated expiration: 1903-12-21

Description

(No Model.) I

' v C. BAYER.

PIANO FORTE DAMPER ACTION.

No. 354,619. v Patented Dec. 21.1886.

N PEYERS PhmwLlhognphnr. W: hi uun. O C

UNITED STATES PATENT OFFICE.

CHARLES BAYER, OF NEW YORK, N. Y.

PIANO-FORTE DAMPER-ACTION.

SPECIFICATION forming part of Letters Patent No. 354,619, dated December 21, 1886.

Application filed September 17, 1886. Serial No. 213,773. (No model.)

To all whom it may concern.-

Beit known that I, CHARLES BAYER, a citizen of the United States, residing at New York, in the county and State of New York, have invented a new and Improved Piano-Forte Damper-Action, of which the following is a specification.

- lhis invention relates to damper-actions for piano-forties, and it more especially refers to bearings of damper-cranks and the manner of attaching the same to the rail.

The invention consists in the improvements 7 (Not shown in the drawings.)

b b are the pivots on which the crank or bar Bturns. These pivots are carried by bearings 0. Each of these bearings 0, cast of a air cular or square form, is provided at its face with a socket, e, to receive the pivot b, or

rather the cloth bushes entered within said sockets and receiving the pivots b through them. At the lower surface of the bearing a longitudinal square projection, n, is made, fitting into a longitudinal groove, on, made in the main rail A. The groove m extends the whole length of the rail. When the dampercrank has been fitted to the main action-rail the bearings O or its projection a can easily be moved in. this groove m in its proper place and position, and are then fastened to the rail by screws 1) v.

The end of the cloth bushes entered within the Socket 6 may be lapped downward partly around the projection a, to fill the groove m, and thus obviate the necessity of making an exact fit of the projection n within the groove m, and at the same time allow for any slight irregularities in the casting.

lhe shank b of the pivots b may be slightly crooked, as shown in Fig. 2, to pass the corner of the main rail and allow the crank or bar B to come down upon its cloth or felt bearing to when at rest, free of any contact with the rail or any part thereof. By this arrangement 5 no trimming of the bearing will be required. A plain groove corresponding about to the size of the projection a is all that is required on the main rail, and the work and trouble of countersinking holes or gouging out any part of the rail to gain clearance for the motion of the shank I) or for inserting or withdrawing the pivots b will be obviated, and whereby considerable work and expense in fitting will be saved.

, WVhat I claim is- The combination of the main action-rail A, provided with a longitudinal groove, m, and the damper-crank or lifting-bar B, having pivots b, with the plate-bearing 0, having sockets e on its top face to receive suitable cloth bushes and the pivot b, and longitudinal square projection n on the under side to engageinto the groove m in the main rail, substantially as described.

CHARLES BAYER. Witnesses:

RoB'r. H. ROY, HENRY E. Ronnnn.