OA13021A - Mechanical piano with vibrating rods. - Google Patents

Description

013021

The invention relates to a new mechanical piano in which the sounds are produced by steel rods which vibrate when they are plucked by a pick.

In the classical mechanical piano, the sounds are produced by strained echoes struck by small hammers.

For a piano of this type of a few octaves, the set of tensioned ropes exercesur the frame a very strong traction, which requires a resistant frame, difficult to build and inevitably heavy

Furthermore, the adjustment of the sounds by modulating the tension of the strings is very delicate and the accuracy of said sounds remains vulnerable to the weather, especially the temperature variations.

In this piano, the stems that produce the sounds are steel springs attached to a wooden board. There is no pull on the frame. The latter is therefore simple and light. Similarly, the adjustment of sounds by cursor is easy and the weather does not affect their accuracy.

Each rod has four parts: - a fastening tail - a spiral part (from 0 to 10 turns) - a rubber slider to adjust the sound - an elongated and curved end.

Figure 1 shows a complete vibrating rod.

Figure 2 shows a pick with its accessories.

In the present piano the sounds are produced by steel rods which vibrate under the excitement of a pick. Each rod is a stainless steel wire having four parts - a tail 2 to 3 cm long (1) by which the rod is fixed on the board of resonance drop (13): - a part formed from 0 to 10 turns about 1 cm in diameter (2) - a rubber slider (3) that can slide hard along the elongated tip of the rod The further the slider moves away from the spiral, the louder the sound becomes. in the opposite case, the sound becomes more and more acute, - an elongated and slightly curved end (4) that is gripped by the pick 5 (5), a kind of large rigid lamella. The pick is securely attached to the base of the pick holder (7) ο _ 013021

The pick-up door is a wooden strip of 15 cm long, provided with a small crankshaft (11), a shim (6), a rectilinear return spring (9) and a cork damper (8) .

Equipped with all its accessories, the pick holder plays an important role in the operation of the piano. 5 'When the key (10) is pressed, the pick holder rises, the pick picks up the end of the shank. When the key is released, the medal holder goes back down, and on the way down, it moves back a little, under the combined effect of the shark and the return spring, so that the pick no longer touches the rod. - The pick is stabilized by its wedge, while the shifter touches the end of the rod that it releases only when the holder is re-entered again, which allows to cut the sound at will,

Claims (3)

013021 CLAIMS 1. Mechanical piano with vibrating rods in which each sound is produced by a steel strap which vibrates under the excitement of a pick fixed to the base of a pick-up holder equipped with a crankshaft, a return spring , a damper and a stabilizing wedge. 2. Vibrating rod mechanical piano according to claim 1, characterized by vibrating steel rods, each of which has a stabilizing tail, a spiral portion, an elongated tip and a de-adjustment slider. 3. Mechanical piano vibrating rods according to any one of revenditation 1,2, characterized by a light frame on which exerceauea traction.