Back frame for a piano or the like

Details Back frame for a piano or the like Back frame for a piano or the like

1979-10-01

1982-05-18

Franklin, Lawrence R.

Music

Instruments

Stringed

G10C 304

Patent

active

043299032

ABSTRACT:
A back frame for a piano or like instrument is comprised by a laminated composite structure having outer laminates of sheet steel and an intermediate laminate which is formed by a reconstituted wood product. The steel laminates are joined to the intermediate laminate and the intermediate laminate is substantially thicker than the sheet steel to offset the outer laminates from one another and increase the stiffness of the structure. A plurality of integral beam elements extend through the laminated structure in the same general direction as the tensioning load of the strings in the piano, and the elements are spaced from one another and define openings in the frame through which sound is emitted from the sounding board of the instrument.

REFERENCES:
patent: 802568 (1905-10-01), Huner
patent: 885247 (1908-04-01), Hasbrouck
patent: 1013604 (1912-01-01), Lechner
patent: 3477330 (1969-11-01), Bert

Affiliated with

Also associated with

Rating

Back frame for a piano or the like does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Back frame for a piano or the like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Back frame for a piano or the like will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-481823