US1108791A

US1108791A - Piano-key bushing.

Info

Publication number: US1108791A
Application number: US82513914A
Authority: US
Inventors: Karl C Rogers
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-03-16
Filing date: 1914-03-16
Publication date: 1914-08-25
Anticipated expiration: 1931-08-25

Description

K. 0. ROGERS.

PIANO KEY BUSHING. APPLICATION FILED MAR.16, 1914.

1 1 08,79 1 Patented Aug. 25, 1914.

5] H0214 to:

KARL ROGERS, OF BEAUMONT, TEXAS.

PIANO-KEY BUSHING.

iSpeciflcation of Letters Patent.

Application filed March 16. 1914.

Patented Aug.

25, 1914. Serial No. 825,139.

To all whom it may concern Be it known that I, KARI. C. Rooms, a citizen of the United States, residing at Beaumont, in the county of Jefferson and State of Texas, have invented certain new and useful Improvements in Piano-Key Bushings; and I do hereby declare the following to be a full, clear, and exact descr1ption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in piano actions. In piano actions as commonly constructed, a trouble has been met with incident to the swelling and shrinking of the parts about the pivotal pins in the various parts of the action, thus causing the keys and action to stick and it is with the view of obviating this trouble that I produce by the {present invention a means for mount-ing' tlfi 'ese pins to obviate.

this difliculty.

More specifically, the resent invention consists in the provision o a metallic holder adapted to be fastened to the key or other part of the piano action and adapted to contain the felt which has immediate contact with the pin, a sufiicient space being left between the metallic holder and the marginal edge of the opening in which it is mounted to allow for expansion or shrinkage.

My invention comprises various details of construction and combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claims.

I illustrate my invention in the accompanying drawings, in which:

Figure 1 is a. top plan view of a piano key showing the felt holding device as applied thereto. Fig. 2 is a side elevation. Fig. 3 is a cross sectional view on line 33 of Fig. 1. Fig. 4- is an enlarged detail view of one of the metallic holders. Fig. is a detail sectional view through one of the holders for the center pin. Fig. 6 a detail view of a metallic holder for center pins, and Fig. 7 is a detail view of a modified form of a center pin holder.

Reference now being had to the details of the drawings by letter, A designates an ordinary piano key, made preferably of wood, in which a hole B is formed and in which is driven a metallic holder C, made of any suitable shape, preferably as shown,

aving an opening for the reception of the felt bushing D. Said holder has laterally extending wings E which are bent upon themselves and adapted to hold the outwardly extending ends of the bushing, a suitable space intervening between the faces of the bushing, as shown in the drawings. Said metallic member has laterally extendmg wings, which are preferably corrugated and sharpened upon their under edges, formmg means whereby said wings may be driven into the key and form secure anchorage for'the metallic member.

Upon reference to the sectional view of the drawings, it will be noted that a slight space intervenes between the felt holding part of the metallic member and the wall of the aperture in which the same is positioned in order to allow the wood to expand or shrink under varying conditions as may be the case and without in any way affecting the positions assumed by the felt bushings which are held securely in fixed positions.

In Fig. 6 of the drawings, I have shown a metallic holder, designated by letter F, for a center pin used in various positions to pivot the parts of the action together and in which the two ends of the metallic holder are brought together and adapted to be held securely in place by being driven into the wood through the ivotal holder.

In Fig. 7 I have s own a slightly modified form of center pin holder and which is without the projecting ends and which may be held securely in place by friction.

By the provision of these metallic casings as shown and described, it will be noted that all shrinkage or expansion incident to variations in temperature, moisture, etc., will be prevented as the metallic casings will hold the felt bushings in fixed and unvarying positions.

What I claim to be new is 1. In combination witha piano key, a metallic holder driven into the shank portion of the key and having parts which are bent laterally and upon themselves, bushings held by said parts which are laterally bent, each holder having a slight space intervening between the bushings, said holder tervening between said laterally bent parts which are driven into the piano key, as set of the holder and the wall of the aperture forth. in'the key, said holder having laterally e1r- 2. In combination with a piano key, a tending corrugated parts which are driven 5 metallic holder driven into the shank porinto the piano key, as set forth. tion of the key and having parts which are lln testimony whereof I hereunto my bent laterally and upon themselves, bushsignature in presence of two ings held by said parts which are laterally i C. RQGERS.

having laterally extending corrugated parts bent, each holder having a slight space in Witnesses: 1o tervening between the bushin 's for the 're- A. A. GENTRY, oeption of center rail pins, a slight space in- G. H. HILLS.