SI25098A - New tensioning system and quick change of drum membrane, its components, the drum with a new system and method of tensioning and rapid exchange membrane of the drum - Google Patents

Abstract

The present invention discloses a new system for tensioning and rapidly replacing the drum (9) of the drum consisting of a tension ring (4) which has uniformly arranged attachment ears (41), tensioners (6.60), the base body of the drum (2) , a resonant ring consisting of the same or different segments (3, 33), wherein the membrane tensioners (6) are fixed to the base body of the drum (2) by means of the screw joints (80), and wherein the base body of the drum (2) 9) on the annular frame, where the tension ring (4) is placed on said annular frame so that the axis of each fixing eyelet (41) coincides with the vertical axis of the corresponding mast tensioner (6). The invention furthermore discloses a new tensioner (6, 60) of the mast (9), as well as the process of tensioning and rapidly changing the membrane (9) of the drum.

Description

Manik Manija d.o.o. MIP-8717-SI

1210 Ljubljana - Sentvid, SI

New system for straining and fast changing of the drum drum, its components, drum with a new system and the process of straining and quick replacement of the drum drum

FIELD OF THE INVENTION

The present invention falls within the field of musical instruments, more specifically drums.

The subject of the invention

The subject of the invention is a new system for tensioning and fast changing of the membrane of the drum, its components, as well as the drum with a new system of straining of the membrane and the process of tensioning and rapid replacement of the membrane drum.

The state of the art

Various drums are known in the art, that is, in the field of musical instruments, but in their essential characteristics they are similar to each other. A drum is a percussion in which sound is produced by a membrane. The fins were once made of animal skin, but today they are made primarily of artificial materials. The basic body of the drum is essentially a tube, or rather a hollow cylindrical body, which has two, usually parallel, base planes, or parallel base edges, on which the abutments are mounted and tensioned. The user, by tapping on the tensile membrane, produces a sound whose frequency or tone depends on the voltage level of the membrane.

A particular type of drum, known in the art as "the small drum" or "snare drum", has a lower membrane called a resonant membrane, and below it has a strained mesh that produces a characteristic noise. During the use of the drum, the tensioning of the membrane, or the manipulation of the drum, wear and damage to the membrane can also occur. Drum with damaged membrane is unusable, so the only solution is to replace the membrane.

Technical problem • · · ·

Drums according to the state of the art have a membrane fastened to the body of the drum with a retaining ring having evenly spaced holes around the circumference through which we push the tensioning screws and screw them into the corresponding threaded nuts secured to the outer jacket of the drum body. The rings have a different number of holes, usually between 4 and 12.

In the case of changing the membrane, the user must unscrew all, ie at least four tensioning screws, remove them from the ring, remove the ring, replace the membrane, reinstall the ring and tighten all the tensioning screws, then adjust the tensioning screws by adjusting the tightening of the tensioning screws.

It is often necessary to change the membrane in the studio just before or even during the concert, which in the present way is almost impossible since it requires too much time. The time required to change one membrane as described above ranges between 5 and 20 minutes.

A technical problem that the present invention is concerned with is a system that makes it possible to quickly and easily change the lining of the drum as well as its tuning.

BRIEF DESCRIPTION OF THE INVENTION

The present invention solves the described technical problem by introducing a system for strapping the drum drum, which enables extremely fast replacement of the drum drum as well as its tuning.

Short description of the pictures

The following is an object of the invention by means of the accompanying drawings, which show:

Figure 1: Drum with new dismantled drum tensioning system, in disassembled form,

Figure 2A: Detail of the point of engagement of the tension ring,

Figure 2B: Drum with new composite drum system, in composite form,

Figure 2C: Basic drum body in vertical section, with base of tensioner,

Figure 3A: segment of the resonant ring in the first embodiment,

Figure 3B: segment of resonant ring in another embodiment,

Figure 4: Tension ring,

Figure 5A: depiction of a ring-segment screw joint,

Figure 5B: assembly of a bass drum tension and resonant ring,

Figure 5C: mounting of the bass drum support plate,

Figure 6A: Figure 6B: Figure 6C: Figure 6D: Figure 6E: Figure 6F: Figure 6G: Figure 6H: Figure 61: Figure 7:

dismantled tensioner, first embodiment, tensioner base shown in Figure 6A, from the front, tensioner base shown in Figure 6A, rear, composite strap according to Figure 6A, from the front, 6A membrane tensioner composite form, rear, membrane tensioner in front, second embodiment, membrane tensioner shown in Figure 6F, rear, base of the membrane tensioner shown in Figure 6F, front, base of the membrane tensioner shown in Figure 6F , at the rear, a drum with a sheath tensioning system according to the state of the art,

Description of the drum bracing system according to the prior art

Figure 7 shows a drum 70, in this case a "small drum", with a sheath tensioning system 71 A, 71B drum 70 according to the prior art. The drum 70 consists of a basic upright cylindrical body 72 which has two parallel base faces on which the upper lining 71A and the lower lining 71 B. are mounted and tensioned. annular subframe whose inner diameter fits loosely to the outer diameter of the base body 72 of the drum 70.

The sheaths 71A, 71B are pressed onto the base body 72 of the drum 70 by the rings 73A, 73B, which have perpendicular ears with holes through the periphery 731 at the perimeter. 72 nuts 74. Through said holes 731, screws 732 are inserted vertically, upwards or downwards, with a washer 733, which are screwed into their respective nuts 74.

In this way, the annular frame of the membrane 71A, 71B is pushed to the base body 72 of the drum 70. By tightening the screws 732, the membrane 71A, 71B is tensioned and the degree of tensioning of the membrane is also adjusted to the desired frequency or tone.

The described sheath tensioning system 71A, 71B is substantially the same regardless of the sheathing material.

Figure 7 also shows a clamp 75 for tensioning the resonant mesh that runs below the bottom 7IB. As the mesh of the bottom face 71B must touch, the bottom ring must

73Β have two diametrical slots through which a strap or string is used to tighten the lower mesh. As a result, the "small drum" rings 73A and 73B are not the same.

When replacing the liner 71 A, 71B, all screws 732 are required, which replace the liner we want to replace, tighten, unscrew and remove, then remove the ring 73A and 73B, then replace the liner and repeat the process in the opposite direction, followed by tuning the drum 70.

DETAILED DESCRIPTION OF THE INVENTION

The present invention solves the described technical problem by introducing a system for straining the drum drum, as described below with the help of the embodiment shown in the accompanying drawings.

Hereinafter, the present invention is described by way of the embodiment of a small drum, and the system is essentially the same for all sizes or types of drums. The difference is only with the bass drum, where the resonant ring takes on the role of a support or support ring for the plate, to which a pedal is attached, by which the drum moves the bar striking the drum base with the foot.

Figure 1 shows a drum 1 with a system for straining a drum drum according to the present invention. The drum 1 shown consists of the base body of the drum 2 having holes 21 attached to the outer circumference 21 for fixing the tensioners of the membrane 6. As shown in Figure 2C, the base body of the drum 2 has an upper and lower edge 22 so that the contact surface of the membrane 9 the base body of the drum 2 is minimized, which provides a better vibration of the membrane.

The base body 2 of the drum 1 is loosely positioned on the annular frame 9, and on the annular frame, the tensioning ring 4 is positioned such that the axis of each attachment ear 41 coincides with the upright axis of the corresponding annular tensioner 6. The resonant segments are optionally attached to the attachment ring 4. ring 3.

The same sequence of elements has the shown drum 1 also on the underside, except that between the tensioning ring 4 and the optional segments of the resonant ring there is a resonant mesh 7A, which is fixed on one side to the base body 2 of the drum 1, and on the other side clamped in tensioner 7B.

The attachment and tensioning of the resonant mesh is known in the art, so it is not described in more detail. An essential novelty of the system of the present invention with respect to the resonant mesh 7A is that it passes through the gap between the tension ring 4 and the segments of the resonant ring 3.

In the example shown, the sheath 9 is fixed to the base body 2 of the drum 1 by means of ten sheath tensioners 6, which are evenly spaced and fixed to the circumference of the drum, in the present case, therefore, at a distance of 36 ° from each other. The number of N tensioners 6 for tensioning one membrane 9 depends on the type of drum. In the embodiment shown, this is a small drum where the nominal diameter of the membrane 9 is 14 inches (about 355 mm). The number of tensioners 6 can be adjusted to the wishes of the client and usually ranges from 4 to 12, but of course smaller and especially larger numbers are possible.

Tension ring

Figure 4 shows a tension ring 4 which is flat and has an inner radius R1 and an outer radius R2. Along the outer circumference, the ring 4 has a number N equal to the flat plate 41, extending radially from the outer shell of the ring 4 to the radius R3. In the example shown, the number of ears is 41 ten, at an angular distance of 36 °. The mounting ear 41 consists of two flat, laterally symmetrical, lateral projections 41 A through a radius, through which holes 41B of diameter Dl, which are located at the axial distance XI and the angular angular distances al, and whose centers are located on the circle, pass in the axial direction. with Rvl radio. Between said lateral projections 41A is a groove 41 C having a tapered mouth 4ID. The centers of the closest holes 41B of the two adjacent ears 41 are located at an angular distance βΐ.

Said axial distance XI between holes 41B is substantially the same, regardless of the nominal diameter of the membrane 9 and is between 22 and 28 mm, in a preferred embodiment, the wheelbase XI is 25 mm. The angular distance al between holes 41B depends on the nominal diameter of the membrane 9 and in the present case is about 7 °, since the diameter of the membrane 9, the wheelbase XI does not change, it is clear that the angular distance al increases with increasing of nominal diameter 9, smaller, and vice versa.

The inner radius R1 of the tension ring 4 depends on the nominal diameter of the membrane 6 and in the present case is approximately 180 mm. In the embodiment shown, the outer radius R2 is larger by about 7 mm from the inner radius R1, the radius Rvl is larger by about 10 mm from the inner radius R1, and larger by about 18 mm from the inner radius R1.

The thickness of the described tensioning ring 4 in the embodiment shown is approximately 4 mm, but may be larger or smaller, depending on the required tensioning force. The tensioning ring is made of suitable metal, preferably stainless steel, but may also be made of wood or plastics with appropriate strength properties.

The segment of the resonant ring

Figure 3 shows a segment of resonant ring 3 describing an arc with angle δ and having an inner radius R4 and an outer radius R5. Four identical, symmetrical, flat mounting flat ears 31 extend radially from the outer circumference of segment 3 extending radially from the outer shell of segment 3 to radius R6, where they are rounded off. Through the aforementioned ears 31, holes D2 in diameter, whose centers are located on a circle with radius Rv2, pass in the axial direction. The angular distance between the centers of the holes 32 of the two closest ears 31 is a2 and their axial distance is X2. The angular distance between the center of the hole 32 of any extreme ear 31 and the center of the hole 32 of its closest ear 31 is β2.

Said angle a2 of segment 3 equals angle al of tension ring 4, said angle β2 of segment 3 equals angle βΐ of tension ring 4, and also the wheelbase X2 equals the wheelbase XI between the holes 41B of the ear 41 of the tensioning ring 4. Radius Rv2 of the segment 3 is equal to the radius Rvl of the tensioning ring 4. The diameter of the D2 holes 32 of the ears 31 of segment 3 is larger than the diameter D1 of the holes 41B of the tensioning ring 4.

It follows from the above that the sum of the angles al and βΐ of ring 4 is equal to the sum of the angles a2 and β2 of segment 3, namely, that sum depends on the number N (hereinafter: division), which represents the number of tensioning clips 5 and, consequently, the fixing ears 41 of the ring 3 and is 360 ° / N. As described above, the wheelbase XI, which is equal to the wheelbase X2, is substantially the same, regardless of the nominal diameter of the membrane 9 and is between 22 and 28 mm, in a preferred embodiment, the distance XI is 25 mm.

Said sum of the angles al and βΐ and a2 and β2 respectively determines the division of the fixing points or their angular distance, and in the described embodiment is 36 °.

Said angle δ of segment 3 is less than two divisions, so in the embodiment described here it is less than 72 °.

The thickness of the described segment 3 in the embodiment shown is approximately 4 mm. In the preferred embodiment, the inner radius R4 of segment 3 is smaller than the inner radius R1 of ring 4 and in the embodiment described is 350 mm, the outer radius R5 of segment 3 is larger by about 10 mm from the inner radius R4 and the radius R6 is larger by about 22 mm. As mentioned above, the radius Rv2 of segment 3 is equal to the radius Rvl of the tension ring 4.

In the embodiment described, the resonant ring consists of five equal segments 3. It is also possible to perform a resonant ring with any number of segments that may be different depending on the user's preferences.

Figure 3B shows a second embodiment of the resonant ring segment 33 extended by one division, which in the embodiment described is 36 °. All the radii Rv2, R4, R5 and R6 are the same as in segment 3, and the mounting flat ears 31, angles a2 and β2, as well as the wheelbase X2 are the same. It follows from the foregoing that the angle 62 of segment 33 is greater than the angle of segment 6 by one division. Therefore, 62 = δ + 36 °. In the manner described, the segment of the resonant ring can be extended by any number of divisions.

In the manner described, segment 3 of the resonant ring can be shortened by one division or extended by one, two or three divisions. In a preferred embodiment, the segment of the resonant ring 3 is no shorter than that shown in Figure 3A.

Description of the coupling of the resonant segments to the ring and the assembly process

The joint of the resonant segment 3 and the ring 4 is shown in Figure 5A and consists of a spacer 10A, a threaded bushing 10B, a screw 10C, a spring washer 10D and a spacer 10E. As shown in Figure 5A, place the resonant segment 3 on ring 4 by positioning all the holes 32 of the resonant segment 3 coaxially above the positionally corresponding holes 41B of the tension ring 4. The distance between the upper plane of the tension ring 4 and the lower plane of the segments of the resonant ring 3, defined by the length of the spacer 10A is between 8 and 15 mm, preferably between 10 and 13 mm. A spacer 10A is coaxially inserted between the ring and the resonant segment at the locations of holes 32, 41B, and then a threaded sleeve 10B is inserted from the upper side into the hole 32 of segment 3. Insert a screw 10C from the underside into the hole 41B of ring 4, on which the 10D spring washers and the spacer 10E are located. Screw 10C, the thread of which corresponds to the thread of threaded bushings 10B, screwed into threaded bushings 10B. When screwed in, the screw 10C does not reach the upper end of the threaded sleeve 10B by about 2 mm.

Mentioned 10C bolt, 10D spring washer, and 10B threaded sleeve are standard items that are commercially available for sale. All of the above elements are preferably made of stainless steel, or they can also be made of plastic, with appropriate strength properties.

By mounting five resonant segments 3 on ring 4 in the manner described, we obtain a resonant ring assembly consisting of five resonant segments 3 that do not contact each other laterally and a tension ring 4..

In the same way, the assembly of segment 33 on ring 4 is carried out. As mentioned, it is also possible to carry out a resonant ring with any number of segments that may be different from one another. Thus, for example, the resonant ring can be made up of two segments 3 and 33, which can be optionally applied along the tension ring 4. The distance between the flanks of the two adjacent segments 3,33 is at least 2 mm.

With the bass drum standing or lying on the floor, the user presses the pedal with his foot, which moves the stick, which hits the bar. In this case, it is not necessary for the resonant ring to be composed of segments, since the resonant ring assumes the role of a support ring 30A or a support ring 3 A for the violent plate 3C to which the pedal is attached. For the bass drum, a 3A support ring is used on the side where the pedal is mounted, and a 30A support ring is used on the opposite side.

As shown in Figure 5B, on the side where the pedal is mounted, a tension ring 4A is used, which is identical in all elements to the tension ring 4 described above, except that there is a hole 49 in the middle between the two adjacent attachment ears 41, to which a support ring 3A is made, which is made of a single piece, which is broken in place 3B. At break point 3B, a support plate 3C is inserted and attached to the gap, to which the bass drum pedal is then attached (not shown).

• · · ·

..... ···

On the opposite side of the bass drum, a tension ring 4 is used, as described above, to which a support ring 30A is attached, which in all elements is the same as the support ring 3A, except that it has no interruption and therefore runs continuously throughout the circumference.

The method of fixing the 3C plate to the rings 4 and 3A is illustrated in Figure 5C. Plate 3C is secured to ring 3A by two screws 50A and to ring 4 by one screw 50, where it is important that the screw 50 has a recessed head and the hole 49 has a properly taped edge and does not protrude from ring 4 after assembly.

In other details, the rings 3A, 30A are the same as the above-described segment of the resonant ring 3, 33. The joint of the ring 4, 4A and the ring 3A, 30A is the same as that described above of the joint of ring 4 and the segments of the resonant ring 3, 33.

In the mounted state, from the underside of the assembly of the ring 4 and the ring 3, 33, 3A extend the spacers 10E and the screw heads 10C, which represent the center of the point when the assembly of the ring 4 and segments 3, 33, 3A is placed on the base 9, previously laid on the base the body of the drum

2.

Description of the tensioner of the membrane

The first embodiment of the sheath tensioner 6 is disassembled in Figure 6A. The tensioner 6 consists of a base 61, a tensioning handle 62, two levers 63, a lower twist 67, with associated lugs 67A, a middle lug 66, with associated lugs 66A, a tightening screw 64 with a washer 64A, and a top lug 65 with associated lugs 65A, where a hole 65B, perpendicular to its longitudinal axis, is threaded through a thread 65B into which screw 64 fits.

Figure 6 clearly illustrates how the above parts of the tensioner are assembled, first by means of the middle strap 66, the base 61 and the handle 62 are assembled, where the strap 66 passes through the openings 62A on the handle 62, and the associated spacer 66A is mounted on the strap 66. Then the upper portions of the levers 63 are inserted on both ends of the upper strap 65 and the associated snap-in fittings 65A are fitted to the upper strap 65. The levers 63 and the catfish 65 thus assembled are placed on the upper groove 61C of the base 61, and the lower portions of the levers 67 are inserted into the two portions of the levers 63, and the associated clamp 67A is mounted thereon. At • * ·

the bottom catcher must then pass through the lower groove 62B of the arm 62 and the lower opening 61A of the base 61. Then screw a screw 64 on which a washer 64A is mounted in the threaded hole 65B of the upper catcher 65. The combination of the screw 65 and the threaded holes 65B enables the screw 64 to be circularly moved about the axis 65.

This puts the tensioner together. The handle 62 is rotatable about the base 61 in relation to the base 61. The arms 63, which are connected above to the upper catfish 65, and below to the lower catfish 67, form part of the tensioning mechanism. Given that the catfish 65, 67 are not fixedly clamped but move freely in the beds, the entire tensioning mechanism of the tensioner 6 is provided with maneuvering space for mounting and tensioning the system for straining the drum and for tuning the drum.

Figures 6B and 6C show the base 61, where the lower opening 61A of the base 61 is shown more clearly. As described above, the lower catfish 67 passes through. When the tensioner 6 is in the open or open state, the catfish is in the upper part 61D of the opening 61 A. When the handle 62 of the tensioner 6 is pushed towards the base 61, the handle 62 rotates about the middle snap 66, and the lower snap 67 travels down to the toothed portion 61E of the opening 61 A. In Fig. 6B, it shows a gear allowing three positions of the tensioner 6, thereby giving three levels of tension to the membrane 9, which is most strained when the lower catfish 67 is in a position furthest from the upper portion 61D of the opening 61 A. The base 61 has two holes 61B for fixing on the lower side. to the base body of the drum 2.

The assembled tensioner 6 is illustrated in Figures 6D and 6F.

Screw 64 and snap hooks 65A, 66A, 67A are standard elements as well as catfish 66, 67 and are commercially available or known in the art. All of the catfish mentioned have a groove at the ends that fits into the attachment. In the embodiment described, a quadrilateral screw with an M6 dimension of appropriate length of between 40 and 100 mm in the preferred embodiment is used. All parts of the described sheath tensioner 6, with the exception of the washer 64A, which is made of plastic, and the snap-ins 65A, 66A, 67A are made of metal, and in the preferred embodiment of stainless steel, they can also be made of plastic, with appropriate strength properties.

• ·

Another embodiment of the sheath tensioner 60 is shown in compound form in Figures 6F and 6G. The tensioner 60 consists of a base 610, which is essentially a double base 61 of the tensioner 6 after the first embodiment. The base 610 has the same elements as the one above mounted on the base 61, except that there are two tensioners assembled on one base, each looking in their own direction.

The base 610, which is shown in more detail in FIGS. 6H and 61, has three OB holes at the rear, for mounting the tensioner 60 to the base body of the drum 2. The number of confirmation holes 61 OB is from 2 to 4, in the preferred embodiment, the base 610 three holes 61 OB. With the tensioner 60, we can independently tension the two drums 9 of the drum 1. The base 610 has a double toothed 610E, 610F, which allows for several mutually independent voltage levels of the individual membrane 9.

The sheath tensioner 6 is secured to the base body of the drum 2 by a base, where screw connections 80 pass through the corresponding holes 21 (the upper two holes or the lower two holes on the base body of the drum 2 above each other) and the holes 61B in the base 61. , where each screw joint 80 consists of a threaded sleeve 10B which is the same as the aforementioned threaded sleeve 10B, screws 10F, washers 10D (which are the same as above) and wide washers 10G.

Figure 2B shows schematically the attachment of the base 61 of the tensioner 6 to the base body of the drum 2. All of the above elements of the screw joint 80 are standard and preferably made of stainless steel.

In the case of a tensioner 60, only three holes are arranged vertically at the base of the drum, at the same distance from each other as the holes 61 OB at the base 610.

In the embodiment described above, standard M5 hex screws, suitable lengths, corresponding washers and the mentioned threaded bushes 10B are used, which is a so-called flat head M5 with a flat head and a ribbed neck of approx. 14 mm. Such screw joints are known in the art, so we do not describe them in more detail.

Drum assembly with a lining system according to the invention

First assembly

The tensioners of the sheath 6, 60 are attached to the outer circumference of the base body of the drum 2. The arrangement of the fastening of the tensioners 6 is shown in Figure 2A, and in the case of the use of the tensioners 60, the arrangement of the fastening is analogous.

The levers 62 of the tensioners 6, 60 are pushed radially in the extremely open position and the screws 64, which are screwed into the holes with the thread 65B of the screws 65, are tilted outwards.

Put a sheath 9 on the upper frame 22 of the base body of the drum 2 such that the membrane 9 sits on the edge 22 and the frame fits loosely to the outer diameter of the base body of the drum 2. On the base frame 9, a tension ring 4 or a ring assembly 4 and a resonant ring are placed. ring 3, or assembly of tension ring 4A and ring 3A (hereinafter referred to as ring assembly) such that the tension ring 4, 4A sits on the subframe 9. Thus, the spacers I0E and the screw heads 10C hug and center the said assembly with respect to the subframe 9, or disable incorrect installation.

Said tension ring 4, or ring assembly, is rotated so that the middle of the fixing ears 41 coincides with the center of the corresponding tensioner 6, 60. Move the screw 64 on which the washer 64A, tensioner 6, 60 is vertically positioned through the narrowed mouth 4ID. into a groove 41 C having a tapered mouth 41D of the tension ring so that there is a washer 64A between the tension ring 4 and the screw head 64.

Move the levers 62 of the tensioners 6 radially toward the center of the base body of the drum 2 to the fully closed position, and then tighten the screws 64 alternately until all the screws with the desired force press the tensioning ring 4, which also tightens the membrane.

Drum users will be able to know when it is properly tensioned by hitting the base 9 and based on the tone the device emits. By tightening the screws 64, with the tensioners 6 completely closed, 60 the membrane 9 is tensioned to the highest desired tone. By moving the lever 62 of one or more tensioners 6, 60 towards the fully open position, the catcher 67 slides along the toothed portion 61E of the base 6, 60 and the tension of the membrane decreases. The combination of the catfish 67 and the toothed portion 61E of the base, in the example shown, allows for three positions of the tensioner 6, 60 and thus three levels of tension of the membrane 9. The number of positions of the tensioner in the preferred embodiment is 2 or 3.

• · · ·

The process of changing the membrane

When we want to replace the membrane 9, lay the drum 1 on a flat surface so that the membrane 9 that we want to replace above. Then we open all the tensioners 6, 60, which tighten this element 9 by pushing the handles 62 outwards, while tilting all the screws 64 by approx. 90 ° outwards. In this way, the assembly is a tension ring 4, or rings, released and can be removed and the membrane 9 replaced.

The ring assembly is then replaced, all screws 64 erected in the upright position of the opening 41C of the ears 41 of the tensioning ring 4, and all the grips 62 of the open tensioners 6, 60 are closed or pushed into position.

This installs a new membrane 9, which is already tuned. Additional tuning is only required if the new membrane 9 is not the same as the previous one. The procedure described here allows for a quick change of membrane 9 between 40 and 120 seconds.

The present invention is described and illustrated by way of a specific embodiment, but in no way limited thereto. It will be readily apparent to those skilled in the art that various modifications may be made to the individual details and / or elements of the described membrane tensioning system, its components, as well as the drum with the new membrane tensioning system. All such modifications are self-evident and are widespread in the present invention.

Claims (11)

Patent claims 1. Drum tensioning system, characterized in that it consists of: the flattening ring (4), which is flat, has an inner radius R1, an outer radius R2 and has a number of N equal fixing ears (41) extending radially from the outer shell of the ring (4) to the radius R3, where each attachment ear (41) consists of two lateral, symmetrically symmetrical, projections (41 A) through which holes (41 B) of diameter Dl, in the axial direction, whose centers are located on a circle with radius Rvl where the holes are (41B) are located at the axial distance XI and at the angular distance al, where, between the projections (41 A), there is a hole (41 C) with a narrowed mouth (41D), where the nearest holes (4IB) of two adjacent ears (41) are closest. are located at an angular distance βΐ, where the sum of the angles al + βΐ = 360ΎΝ; - a certain number of N tensioners (6), for tensioning one membrane, consisting of a base (61), a tensioning handle (62), two arms (63), augers (66, 67) with associated snaps (66A, 67A), a tensioning screw (64) with washer (64A), and a bolt (65) through which a threaded hole (65B) perpendicular to its longitudinal axis into which the screw (64) fits ); - the basic body of the drum (2) having holes (21) arranged along the outer circumference for attaching the tensioners of the membrane (6) and the upper and lower edges (22) recorded; wherein the sheath tensioners (6) are fastened to the base body of the drum (2) by means of screw connections (80), and where the sheath (9) is placed on the base body of the drum (9) on the annular frame, where a tension ring is placed on said annular frame (4) such that the axis of each fixing ear (41) coincides with the upright axis of the corresponding tensioning strap (6). Drum tensioning system according to claim 1, characterized in that it further comprises: a resonant ring consisting of the same or different segments of the resonant ring (3, 33), wherein said segments of the resonant ring describe an arc of angle δ, δ2 and have an inner radius R4 and an outer radius R5, and • fixing ears (31) arranged along the outer circumference ) extending radially from the outer jacket of segment (3, 33) to radius R6, where they are rounded, where holes (32) of diameter D2, whose centers are located on a circle with radius, pass through said ears (31) in an axial direction. Rv2, wherein the angular distance between the centers of holes (32) of the two closest ears (31) is a2 and their axial distance is X2 and where the angular distance between the center of the hole (32) of any extreme ear (31) and the center of the hole (32) the closest ear (31) to it is β2; where: angle of a2 of segment (3, 33) equal to angle of al tension ring (4); the angle β2 of the segment (3, 33) is equal to the angle βΐ of the tension ring (4), - the radius Rv2 of the segment (3, 33) is equal to the radius Rvl of the tension ring (4); the axial distance X2 of the segment (3, 33) is equal to the axial distance XI of the tensioning ring (4); the diameter of the D2 holes (32) of the segment (3, 33) is larger than the diameter D1 of the holes (4IB) of the ring (4); and - the inner radius R4 of the segment (3, 33) is smaller than the inner radius R1 of the tension ring (4); wherein the resonant ring segments (3, 33) are secured to said tensioning ring (4) by means of screw connections (10A, 10B, 10C, 10D, 10E) such that all the holes (32) of the resonant segment (3) are coaxially above the positioning holes (4IB) of the tension ring (4) and so that the resonant ring segments do not touch laterally, where the distance between the upper plane of the tension ring (4) and the lower plane of the resonant ring segments (3, 33) is between 8 and 15 preferably between 10 and 13 mm. Drum tensioning system according to claim 1, characterized in that it comprises: a tensioning ring (4A) which is identical to the tensioning ring (4) described in claim 1 only to have a hole (49) with a tapered edge in the middle between two adjacent fixing ears (41); and a support ring (3A) made of one piece and interrupted in place (3B) by inserting a support plate (3C) for the bass drum pedal at the interruption point, where the support plate (3C) is attached to the support ring (3 A) with two screws (50A) and a tension ring (4) with a screw (50); wherein the tension ring (4A) and the support ring (3A) are interconnected by means of a helical joint (10A, 10B, 10C, 10D, 10E) as described in claim 2. 4. The membrane tensioner (6) as described in claim 1, characterized in that the base (61) has an opening (61 A) with a toothed rack (61 E), where the toothed rack (61 E) allows more positions of the tensioner of the membrane (6). ) and thus several levels of tension of the membrane (9), where the membrane (9) is most strained when the catfish (67) is in the position furthest from the top (6 ID) of the opening (61 A), where is the number of positions of the sheath tensioner (6) 2 or 3. 5. The membrane tensioner (60), characterized in that it consists of a base (610) and a double number of elements (62, 63, 64, 64A, 65, 65A, 66, 66A, 67, 67A), which comprise a membrane tensioner (6). 6) is described in claim 1, wherein the base (610) has a double toothed rack (610E, 610F) and, by means of a tensioner (60), independently of each other, both drums (9) of the drum (1), where said double toothed rack (610E, 610F) allows for several mutually independent voltage levels of each membrane (9), 6. Drum (1) having a membrane tensioning system, characterized in that it contains: - the basic body of the drum (2) having holes (21) arranged along the outer circumference for attaching the tensioners of the membrane (6) and the tapered top and bottom edges (22); two identical or different drum (9) drums (1); around the circumference of the base body (2) of the drum (1), into the corresponding holes, by means of screw joints (80), the number of 2N sheath tensioners (6) or the number N of sheath tensioners (60) is fixed; two tension rings (4) as described in claim 1. Drum (1) with a sheath tensioning system according to claim 6, further comprising: two identical or different resonant rings consisting of the same or different segments of the resonant rings (3, 33) described in claim 2, wherein the segments of the resonant rings (3, 33) are attached to the tensioning rings (4) as described in claim 2; and / or - one resonant mesh (7A) extending over the entire diameter of the membrane (9) and secured to the base body (2) of the drum (1) on one side and clamped to the tensioner (7B) where said resonant the mesh (7A) is positioned so that it contacts the lower membrane (9) and passes through the gap between the tension ring (4) and the resonant ring segments (3, 33). 8. Drum (1) having a membrane tensioning system, characterized in that it contains: - the basic body of the drum (2) having holes (21) arranged at the outer circumference for attaching the sheath tensioners (6) and the tapered upper and lower edges (22), two identical or different sheaths (9) of the drum (1); - the circumference of the base body (2) of the drum (1), into the corresponding holes, by means of screw joints (80), the number of 2N sheath tensioners (6) or the number N of sheath tensioners (60) are fixed; one tension ring (4A) and one support ring (3A) with the bass drum pedal support plate (3C) attached and inserted, as described in claim 3, which are interconnected by means of helical joints (10A, 10B, 10C, 10D, 10E) as described in claim 2; - one tensioning ring (4) as described in claim 1 and one bearing ring (30A), wherein said bearing ring (30A) is the same as the bearing ring (3A), except that it has no interruption and runs continuously over the entire circumference, which are connected to one another by means of screw connections (10A, 10B, 10C, 10D, 10E) as described in claim 2. 9. A process for changing the drum (9) of a drum (1), characterized in that it comprises the following steps: a) loosening all the grips (62) of the tensioners (6, 60) of the particular membrane (9); b) tilting all the screws (64) of the tensioners (6, 60) of the particular membrane (9) by about 90 ° outwards; c) lifting the tension ring (4) or assembly of the hoops (9); d) changing the membrane (9) with a new, preferably identical membrane (9); e) reinstalling the tension ring (4) or the ring assembly (9); f) returning all the screws (64) of the tensioning bracket (6, 60) of the particular membrane (9) to the vertical position so that the head of each screw (64) with the washer (64A) sits on the upper surface of the ear (41) of the tension ring (4); and g) retightening all the grips (62) of the tensioners (6, 60) of the particular membrane (9) which we removed in step a). The method of claim 9, characterized in that before step a) comprises the step of opening and removing the resonant mesh (7A) and after step g) comprising the step of reinstalling and tensioning the mesh of the resonant mesh (7A). A method according to claim 8 or claim 9, characterized in that after the completion of the process of the membrane (9) there is no need to re-tune and the whole process takes from 40 to 120 seconds.