RU61922U1 - WRAPPED STRING FOR MUSICAL INSTRUMENTS - Google Patents

Abstract

The invention relates to the construction of strings for musical instruments, namely, to strings for plucked and bowed musical instruments. The essence of the utility model is that the string for musical instruments contains a core made of steel wire and a twisting of wire wound uniformly and continuously around the core along its entire length. In this case, the core has a cross section along its entire length in the form of a figure obtained from a regular polygon with an even number of angles, the non-adjacent sides of which are made in the form of arcs of a circle described around this polygon. The use of a core having a cross-section of such a shape allows one to obtain a more snug fit of the winding wire turns to the core surface without additional crimping of the winding material, as well as reliable fixation of each winding coil at all bending points while reducing the degree of its deformation during winding. This allows you to increase the service life and reduce the inharmonious sound of the string.

Description

The utility model relates to the construction of strings for plucked and bowed musical instruments.

Known entwined string for plucked instruments, containing a round core and twisting (A.M. Gorlov, A.N. Leonov, "Production and repair of bowed musical instruments, 1975, p. 154, Fig. 86b, and N. A. Komarov, S. N. Fedyushkin, “Production and repair of plucked musical instruments”, Moscow, Legprombytizdat, 1998, p. 109; Fedosov MV and other RF Patent No. 2070340 C 1 “entwined string for musical tools and the method of its manufacture. ”Patents of the Russian Federation for the invention RU BI No. 34 12/10/96). The drawback of the design of such a string is that due to the elastic deformations that occur in the winding wire at the time of winding, it is difficult to ensure a tight and constant fit of the winding coils to the core, as well as the reliable fixation of each coil of coiling along the entire length of the core in the manufacture of the string. When operating such a string, loosely adjacent winding turns create additional overtones, manifested in increased inharmoniousness of the reproduced tone. In addition, to prevent the development of the winding wire during operation of the string, it is necessary to fasten the ends of the wrapping wire to the core by soldering, winding with a special thread or in any other known manner, which increases the string manufacturing time and reduces productivity.

A twisted string is also known (US Pat. No. 2,10172), which refers to piano strings coated or entwined with a wire whose construction uses a steel wire or core with a cross section of oval, triangular, rectangular or polygonal (except for round and flattened round) forms for the purpose of solid solid fixation of each coil of curling wire wound around such a steel wire. This string design is the closest to the claimed utility model, so it will be considered as a prototype.

The disadvantage of this string design is that the winding is fixed on the core at points formed by sharp ribs connecting the faces of the core, which leads to deformation of the material of the wrapping wire in contact with the core ribs and reduce the life of the string during operation. In addition, the winding wire turns fit snugly on the core only at the fixation points on the ribs

core, and on the rest of the turns of the upholstery there is a gap between the turns of the upholstery and the core, which violates the integrity of the string and leads to an increase in the harmony of sound.

The purpose of this utility model is to create a design that provides an increase in the service life and reduction of the inharmonious sound of the string.

The proposed utility model is a twisted string containing a core of steel wire and a twisting of wire, wound uniformly and continuously around the core along its entire length. In this case, the core has a cross section along its entire length in the form of a figure obtained from a regular polygon with an even number of angles, the non-adjacent sides of which are made in the form of arcs of a circle described around this polygon. The use of a core having a cross section of the described shape allows to obtain a more snug fit of the turns of the entwine wire to the surface of the core while reducing the degree of its deformation during winding, which will inevitably lead to an increase in the service life and decrease in the harmony of the sound of the string.

The advantages and new features of the present utility model will become more apparent from the following detailed description with reference to the attached drawings.

Figure 1 shows a General view of an entwined string containing a core 2 of steel wire and an entwining 1, wound uniformly and continuously around the core along its entire length with the beginning of the entanglement 4 being fastened at one end for a loop 3 of the string.

Figure 2 shows a cross section aa of a twisted string. As shown in figure 2, the core 2 of steel wire has a cross section along the entire length in the form of a figure obtained from a regular polygon with an even number of angles, the non-adjacent sides of which are made in the form of arcs of a circle described around this polygon. The turns of the upholstery 5 fit snugly to the surface of the core exactly repeating the shape of its cross section. In sections A-A *, B-B *, B-B *, G-G *, D-D * and E-E *, which have the shape of arcs described around a polygon of a circle, as well as on straight-line sections of the sides of the polygon, a dense the fit of the turns of the winding 5 to the core 2 due to the smooth bending of the winding material due to its standard tension without additional crimping of the winding material in the process of winding on a stringing machine. At the same time, at points A, A *, B, B *, C, B *, G, G *, D, D *, E, and E *, there is a sharp bending of the winding material, due to which local fixation is ensured at these points each coil upholstery to the core. Thus, when

the presence, for example, of six faces at the core, the fixation of each coil round occurs at 12 points.

A core having a cross-section in accordance with the proposed utility model can be obtained by one of the known methods for manufacturing shaped wire - broaching, rolling or otherwise. The upholstery can be made of soft wire of flat or round cross-section. The proposed string can be made on stringing machines that do not require special conversion.

Thus, as can be seen from the above, it is the claimed combination of structural features that ensures the achievement of a technical result that cannot be obtained in prototypes and other known devices.

Claims (1)

A twisted string for musical instruments, containing a core made of steel wire and a wrapping made of wire, uniformly and continuously wound around the core, characterized in that the core has a cross section along its entire length in the form of a figure obtained from a regular polygon with an even number of angles, non-adjacent sides which are made in the form of arcs of a circle described around a given polygon.