Provided is a grand piano comprising a rim made of a transparent material, an outer layer formed of a semi-light transmitting material, an inner layer and a bottom layer, which are formed of a material reflecting light received through the rim, and a light source comprising a plurality of point light sources to emit light toward the rim.

Provided is a grand piano comprising a rim made of a transparent material, an outer layer formed of a semi-light transmitting material, an inner layer and a bottom layer, which are formed of a material reflecting light received through the rim, and a light source comprising a plurality of point light sources to emit light toward the rim.

A piano string frame comprising a frame plate having a perimeter portion enclosing an aperture, and a strut bisecting the aperture. The perimeter portion has a bass pin portion to support a first end of a plurality of bass strings; a bass hitch portion to support a second end of a plurality of bass strings; a treble pin portion to support a first end of a plurality of treble strings; and a treble hitch portion. To support a second end of a plurality of treble strings. The strut extends from a first point to a second point. The second point is disposed at an end of the treble hitch portion to support a second end of a lowest pitched treble string, such that the strut is underneath any bass strings supported by the piano string frame, and such that no part of the frame plate is disposed over any strings.

A piano string frame comprising a frame plate having a perimeter portion enclosing an aperture, and a strut bisecting the aperture. The perimeter portion has a bass pin portion to support a first end of a plurality of bass strings; a bass hitch portion to support a second end of a plurality of bass strings; a treble pin portion to support a first end of a plurality of treble strings; and a treble hitch portion. To support a second end of a plurality of treble strings. The strut extends from a first point to a second point. The second point is disposed at an end of the treble hitch portion to support a second end of a lowest pitched treble string, such that the strut is underneath any bass strings supported by the piano string frame, and such that no part of the frame plate is disposed over any strings.

A toy piano including one or both an enlarged sound plate intermediate the sound bar of the toy piano and its sound board, and a sound box into which the sound board is incorporated. Preferably, the sound plate extends beyond the normal edges of the sound bar in which the longitudinal tines of the toy piano are mounted so as to lie adjacent to the sound board over a larger area. Likewise, the sound box should preferably be shaped so as to be somewhat wider (measured in the longitudinal direction of the tines) towards the end where the tines are longest (and produce lower tones) and somewhat narrower towards the end where the shorter tines (producing higher tones) are located. It preferred shape is characterized by somewhat convex curves at the more treble and bass ends, respectively, of the sound box with a somewhat concave curve intermediate these two ends. The backboard of the sound box can be bowed outward for enhance acoustics.

A toy piano including one or both an enlarged sound plate intermediate the sound bar of the toy piano and its sound board, and a sound box into which the sound board is incorporated. Preferably, the sound plate extends beyond the normal edges of the sound bar in which the longitudinal tines of the toy piano are mounted so as to lie adjacent to the sound board over a larger area. Likewise, the sound box should preferably be shaped so as to be somewhat wider (measured in the longitudinal direction of the tines) towards the end where the tines are longest (and produce lower tones) and somewhat narrower towards the end where the shorter tines (producing higher tones) are located. It preferred shape is characterized by somewhat convex curves at the more treble and bass ends, respectively, of the sound box with a somewhat concave curve intermediate these two ends. The backboard of the sound box can be bowed outward for enhance acoustics.

The present invention relates to a piano or a grand piano with a resonance board and strings which rest on a sound bridge with two longitudinal faces. Such a sound bridge serves to transmit vibration energy which is output by the strings of the instrument to a resonance board. The invention is based on the realization that, on the one hand, the rigidity of the sound bridge must be maintained at the locations at which it is in contact with the strings and the resonance board. On the other hand, it is advantageous if the mass of the sound bridge is reduced. For this reason, according to the invention it is proposed that the sound bridge have a first cutout and a second cutout, wherein the two cutouts are arranged on the two longitudinal edges of the sound bridge which lie opposite one another.

The present invention relates to a piano or a grand piano with a resonance board and strings which rest on a sound bridge with two longitudinal faces. Such a sound bridge serves to transmit vibration energy which is output by the strings of the instrument to a resonance board. The invention is based on the realization that, on the one hand, the rigidity of the sound bridge must be maintained at the locations at which it is in contact with the strings and the resonance board. On the other hand, it is advantageous if the mass of the sound bridge is reduced. For this reason, according to the invention it is proposed that the sound bridge have a first cutout and a second cutout, wherein the two cutouts are arranged on the two longitudinal edges of the sound bridge which lie opposite one another.

A transportable stringed keyboard instrument includes a lightweight sound-body formed of several layers with front plate and back plate of material of high modulus of elasticity like steel or higher, with a side plate of a material of high modulus of elasticity like steel or higher, bonded to various layers between front plate and back plate. A method of forming a lightweight sound-body includes a single press procedure, wherein the sound-body is formed with bending in opposite direction compared to bending forces due to the string load. An upright piano action is optimized for space reduction so that keys can be positioned closer to the strings and a rotatable action together with the keys form a separate unit for transportation, apart from the sound-body.

A transportable stringed keyboard instrument includes a lightweight sound-body formed of several layers with front plate and back plate of material of high modulus of elasticity like steel or higher, with a side plate of a material of high modulus of elasticity like steel or higher, bonded to various layers between front plate and back plate. A method of forming a lightweight sound-body includes a single press procedure, wherein the sound-body is formed with bending in opposite direction compared to bending forces due to the string load. An upright piano action is optimized for space reduction so that keys can be positioned closer to the strings and a rotatable action together with the keys form a separate unit for transportation, apart from the sound-body.