Abstract
The invention relates to a device for tightening the strings of a keyboard musical instrument. The device provides for rigidly securing a tuning pin in position by means of a collet pressing into a cast-iron frame, an elastic ring being mounted on windings of a string. The present technical improvements increase tuning stability and tuning retention, increase string resistance to breaking, and increase the service life of a musical instrument.
Claims
1. A device for tightening piano strings, the device comprising a cast-iron frame, an outer rim and a sound board connected to each other via large screws and bolts, wherein a wooden plug is pressed into the opening of the cast-iron frame, tuning pins are pressed into the wooden plug and into a wooden sound board, and string windings are wound on the tuning pins, characterized in that a collet with a lip is pressed into the cast-iron frame with corrugation, the tuning pin is installed in the collet, and an elastic ring is sleeved onto the string windings.
2. A device for tightening piano strings, the device comprising a cast-iron frame, an outer rim and a sound board connected to each other via large screws and bolts, wherein a wooden plug is pressed into the opening of the cast-iron frame, tuning pins are pressed into the wooden plug and into a wooden sound board, and string windings are wound on the tuning pins, characterized in that a collet is pressed into the cast-iron frame with corrugation, the tuning pin is installed in the collet, the tuning pin is pressed into the sound board, an elastic ring is sleeved onto the string windings, and a string winding is wound on the blades of the collet.
3. A device for tightening piano strings, the device comprising a cast-iron frame, an outer rim and a sound board connected to each other via large screws and bolts, wherein a wooden plug is pressed into the opening of the cast-iron frame, tuning pins are pressed into the wooden plug and into a wooden sound board, and string windings are wound on the tuning pins, characterized in that a lock pin is pressed into the wooden plug and the sound board, and an elastic ring is sleeved onto the string windings.
4. A device for tightening piano strings, the device comprising a cast-iron frame, an outer rim and a sound board connected to each other via large screws and bolts, wherein a wooden plug is pressed into the opening of the cast-iron frame, tuning pins are pressed into the wooden plug and into a wooden sound board, and string windings are wound on the tuning pins, characterized in that lock pins are pressed into the wooden plug and the sound board, and an elastic ring is sleeved onto the string windings.
5. A device for tightening piano strings, the device comprising a cast-iron frame, an outer rim and a sound board connected to each other via large screws and bolts, wherein a wooden plug is pressed into the opening of the cast-iron frame, tuning pins are pressed into the wooden plug and into a wooden sound board, and string windings are wound on the tuning pins, characterized in that a washer with corrugation is pressed into the cast-iron frame, the tuning pin is installed in the opening of the washer, and an elastic ring is sleeved onto the string windings.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1 shows a view of a tightening device with a mounted collet with a lip in the cast-iron frame and with a ring made of an elastic material mounted on string windings.
(2) FIG. 2 shows a view of a tightening device with a mounted collet with blades and string windings wound thereon and with a ring made of an elastic material mounted on the string windings.
(3) FIG. 3 shows a view of a tightening device with a lock pin in the wooden plug and with a ring made of an elastic material mounted on string windings.
(4) FIG. 4 shows a view of a tightening device with additional lock pins in the wooden plug and with a ring made of an elastic material mounted on string windings.
(5) FIG. 5 shows a view of a tightening device with a washer in the cast-iron frame and with a ring made of an elastic material mounted on string windings.
DETAILED DESCRIPTION OF THE INVENTION
(6) A device for tightening the strings of a keyboard musical instrument of embodiment 1 (see FIG. 1) comprises: a cast-iron frame 1 with a nut 2, a collet 3 with a lip 5 pressed into the cast-iron frame with corrugation 4, a lock nut 7 screwed onto the thread of blades 6 on the other side of the collet 3, a tuning pin 8 installed in the collet 3, a string 9 installed in the opening (not shown in the figure) of the tuning pin 8, windings 10 of the string 9 wound on the tuning pin 8, an elastic ring 11 sleeved onto the windings 10, and a screw 12 with a clamping plate 13 for the string 9 installed in the cast-iron frame 1.
(7) The elastic ring 8 can be made of any soft material, such as nylon, polyvinyl chloride, silicone, polyurethane, etc.
(8) The device is operated as follows.
(9) A tuning key (not shown in the figure) is placed on the tuning pin 8 (see FIG. 1), the tuning key is turned to tune string 9 to a required pitch; when the hammer strikes string 9 (the hammer not shown in the figure), string 9 does not detune; stable retention of the set pitch is ensured by compressing the windings 10 of the string 9 by means of the elastic ring 11. Upon repeated strikes of the hammer on the string 9, collet 3 ensures reliable retention of the tuning pin 8, preventing it from tilting towards the direction of string 9 tightening, and string 9 is held due to the frictional force between the tuning pin 8 and the blades 6 of the collet 3. The friction between the tuning pin 8 and the blades 6 of the collet 3 is adjusted by tightening or loosening the lock nut 7.
(10) A device for tightening the strings of a keyboard musical instrument of embodiment 2 (see FIG. 2) comprises: a cast-iron frame 1 with a nut 2, a sound board 3, a collet 4 with blades 6 pressed into the cast-iron frame with corrugation 5, a tuning pin 7 installed in the collet 4, a string 9 installed in the opening 8 of the tuning pin 7, windings 10 of the string 9 wound on the tuning pin 7, a winding 11 wound on the blades 6 of the collet 4, an elastic ring 12 sleeved onto the windings 10, and a screw 13 with a clamping plate 14 for the string 9 installed in the cast-iron frame 1.
(11) The device is operated as follows.
(12) A tuning key (not shown in the figure) is placed on the tuning pin 7 (see FIG. 2), the tuning key is turned to tune string 9 to a required pitch; when the hammer strikes string 9 (the hammer not shown in the figure), string 9 does not detune; stable retention of the set pitch is ensured by compressing the windings 10 of the string 9 by means of the elastic ring 12. Upon repeated strikes of the hammer on the string 9, collet 4 ensures reliable retention of the tuning pin 7, preventing it from tilting towards the direction of string 9 tightening, and string 9 is held due to the frictional force between the tuning pin 7 and the blades 6 of the collet 4 and the sound board 3; an increase in frictional force of the tuning pin 7 is accomplished by increasing the number of windings 10 on the blades 6 of the collet 4, and a decrease in frictional force of the tuning pin 7 is accomplished by reducing the number of windings 10 on the blades 6 of the collet 4.
(13) A device for tightening the strings of a keyboard musical instrument of embodiment 3 comprises: a cast-iron frame 1 with a nut 2, a sound board 3 (see FIG. 3), a wooden plug 4 pressed into the cast-iron frame 1, a tuning pin 5 pressed into the wooden plug 4 and the sound board 3, windings 6 of the string 7 wound on the tuning pin 5, an elastic ring 8 sleeved on windings 6, a screw 9 with a clamping plate 10 for the string 7 installed in the cast-iron frame 1, and a lock pin 11 pressed into the wooden plug 4 and the sound board 3.
(14) The device is operated as follows.
(15) A tuning key (not shown in the figure) is placed on the tuning pin 5, the tuning key is turned to tune string 7 to a required pitch (see FIG. 3); when the hammer strikes string 7 (the hammer not shown in the figure), the string 7 does not detune; stable retention of the set pitch is ensured by compressing the windings 6 of the string 7 by means of the elastic ring 8; upon repeated strikes of the hammer on the string 7 (the hammer not shown in the figure), lock pin 11 pressed into the wooden plug 4 and the sound board 3 ensures reliable retention of the tuning pin 5, preventing it from tilting towards the direction of string 7 tightening; the string 7 is prevented from unwinding from the tuning pin 5 due to frictional force of the tuning pin 5 being compressed by the wood of the sound board 3 and of the wooden plug 4.
(16) A device for tightening the strings of a keyboard musical instrument of embodiment 4 comprises: a cast-iron frame 1 with a nut 2, a sound board 3 (see FIG. 4), a wooden plug 4 pressed into the cast-iron frame 1, a tuning pin 5 pressed into the wooden plug 4 and the sound board 3, windings 6 of the string 7 wound on the tuning pin 5, an elastic ring 8 sleeved on windings 6, a screw 9 with a clamping plate 10 for the string 7 installed in the cast-iron frame 1, and lock pins 11 pressed into the wooden plug 4 and the sound board 3.
(17) The device is operated as follows.
(18) A tuning key (not shown in the figure) is placed on the tuning pin 5, the tuning key is turned to tune string 7 to a required pitch (see FIG. 4); when the hammer strikes string 7 (the hammer not shown in the figure), the string 7 does not detune; stable retention of the set pitch is ensured by compressing the windings 6 of the string 7 by means of the elastic ring 8; upon repeated strikes of the hammer on the string 7, lock pins 11 pressed into the wooden plug 4 and the sound board 3 ensure reliable retention of the tuning pin 5, preventing it from tilting towards the direction of string 7 tightening, thus providing a rigid position for the tuning pin 5; the string 7 is held due to frictional force of the tuning pin 5 being compressed by the wood of the sound board 3 and of the wooden plug 4.
(19) A device for tightening the strings of a keyboard musical instrument of embodiment 5 comprises: a cast-iron frame 1 with a nut 2, a sound board 3 (see FIG. 5), a wooden plug 4 pressed into the cast-iron frame 1, a tuning pin 5 pressed into the wooden plug 4 and the sound board 3, windings 6 of the string 7 wound on the tuning pin 5, an elastic ring 8 sleeved on windings 6, a screw 9 with a clamping plate 10 for the string 7 installed in the cast-iron frame 1, and a washer 12 with corrugation 13 pressed into the cast-iron frame 1 with the tuning pin 5 installed in the opening of the washer 12 (the opening not shown in the figure).
(20) The washer 12 with corrugation 13 can be pressed into the cast iron frame 1 and installed between the wooden plug 4 and the sound board 3 (not shown in the figure).
(21) The device is operated as follows.
(22) A tuning key (not shown in the figure) is placed on the tuning pin 5 (see FIG. 5), the tuning key is turned to tune string 7 to a required pitch; when the hammer strikes string 7 (the hammer not shown in the figure), string 7 does not detune; stable retention of the set pitch is ensured by compressing the windings 6 of the string 7 by means of the elastic ring 8. Upon repeated strikes of the hammer on the string 7, the tuning pin 5 installed in the opening of the washer 12 is securely held by the washer 12, preventing the tuning pin 5 from tilting towards the direction of string 7 tightening; the string 7 is held due to frictional force of the tuning pin 5 being compressed by the wood of the sound board 3 and of the wooden plug 4.
(23) The technical improvements introduced into the tightening device increase tuning stability and tuning retention, reduce the frequency of periodic re-tuning, prevent additional micro-cracks in places where the string is fractured, thus increasing string resistance to breaking and prolonging the service life of the musical instrument.
INDUSTRIAL APPLICABILITY
(24) The invention can be used in manufacturing of keyboard musical instruments and in modernizing previously available models of pianos, grand pianos, clavichords, harpsichords and gush.
