RU1794259C - Bell - Google Patents

Abstract

The invention relates to acoustics and can be used in fishing, animal husbandry, and musical instruments. SUMMARY OF THE INVENTION: Slots are made in the bell housing from the edge of the housing, the depth of which is 2 / 4-2 / 3 of the height of the housing. In addition, the slots are made curly, in the form of a zigzag. 4 ill.

Description

The invention relates to acoustics and can be used in fishing, animal husbandry, and musical instruments.

A bell is known (U.S. Patent No. 4,619,846), in which gaps were made in the body of the mantle to replace expensive bell bronze with cheap aluminum alloys.

The purpose of the invention is to achieve maximum bell volume.

To do this, cuts from 2 to 4 to a depth of 1/4 of the height of the body to 2/3 were made from the flange (edge of the bell housing). This divides the flange into 2-3 or 4 parts.

The slots go exclusively parallel to the longitudinal axis of the bell.

An increase in sound power is achieved by increasing the amplitude of the vibration (after impact) of the separated parts of the flange and greater vibration.

For a pleasant timbre and tonality, figured slots are made in the form of a zigzag.

The step and amplitude of the zigzags of curly slots depends on the diameter of the case, measured in the middle part of the bell, for which the formula is used

1) W

2) A

 5

SI

10

where W is the step of the figured slot;

A is the amplitude of the figured notch;

 - the diameter of the middle part of the body.

The figured slots extend in their direction from the edge of the bell to the hook and extend exclusively parallel to the longitudinal axis of the bell.

The experiments performed on bells after calculating the zigzags of curly slots according to the mathematical formula showed that the slots correspond to technical standards

Figure 1 shows a fishing bell, a general view with rectilinear slots; figure 2 is the same, a top view; Fig. 3 - the same, with curly slots, a general view; figure 4 is the same, top view.

Figure 1-4 marked: 1 - body, 2 - holder (hook), 3 - drummer, 4 - slots.

Sound power was determined by ear, deviation from the sound source, measures meters.

Holding the holder (hook) rocked the body, drummer, hit the body, made a sound.

a 3

(g

2

4b y

ate about

CA

Bell No. 1 of craft manufacture was tested: alloy - brass, case diameter at the bottom 10 mm, case height 8 mm. For this bell, it was necessary to make three rectilinear slots to a depth of 2/3 of the body height, 0.5 mm wide. Only under these technical conditions the bell rang loudly.

Bell No. 2 was tested (Fig. 1): alloy - stainless steel, TU 221 RSFSR.03-40-82 art. MO-049-01-220, the diameter in its lower part is 25 mm, the height of the housing is 17 mm. For this fishing bell, to achieve the highest volume, it was necessary to make three slots to a depth of 2/3 of the height of the hull. Slots pr are linear. Slot width 0.5 mm

Under such full technical conditions, the bell rang loudly.

Bell No. 3 of craft manufacture was tested: alloy - brass, diameter in its lower part 25 mm, case height 25 mm.

To achieve the highest volume, it was necessary to make four straight slots to the depth of the holder (hook), with a slot width of 0.6 mm. Only when these specifications were met did the bell ring very loudly.

Bell No. 4 was tested (Fig. 3), TU-25-06-936-74, art. KK-049-7887; alloy - steel PK-98. For this bell, to achieve the highest volume and melodic tone, it was necessary to do

and

YU

fifteen

twenty

25

thirty

35

two diametrically located shaped slots to a depth of 2/3, the width of the slot is 0.9 mm.

Only under such technical filled conditions did the bell ring in a loud and melodic tone.

Bell N 5 was tested: alloy - stainless steel, TU 220-RSFSR 0440- 82. art. MO No. 049-03-228.

For this bell, it was required to make two rectilinear slots to a depth of 1/4 of the height of the body, the width of the slot was 1 mm. Under these technically fulfilled conditions, the bell rang loudly ..

We tested a bell N ° 6 of handicraft manufacture (Fig. 3): alloy - copper, diameter in its lower part 50 mm, body height 50. mm.

For this bell, it was required to make two curly slots to a depth of 1/2 the height of the body, the width of the slot was 1 mm.

Thus, the number of slots, their depth, and configurations provide the maximum range of audibility with a pleasant melodious timbre in conditions typical for the operation of fishing bells.

. In order to adjust the bell to the desired timbre and tone, it is possible to arrange slots in the bell casing that are linear with curly ones. For example, one slit of garbage, one pr is linear or two curly and two prilinear, etc.

Claims (2)

1. A bell containing a housing with diametrically arranged slots and a drummer, characterized in that, in order to increase the sound volume, a the cuts are made from the kral of the body, the depth of which is 1 / 4-2 / 3 of the height of the body. . 2. The bell according to claim 1, on the basis of which the slots are made zigzag. Figure 1