SU91041A1 - Electric device for tuning the piano - Google Patents

Description

An electric piano tuner is available; Allowing yupshi to compare pa to the ear and using the arrow to indicate the frequency of oscillation of the scab piano.

An example of the proposed device is the use of two:) LSCtr Pl generators with electromechanical converters H, the beat indicator of their frequencies, one of which is determined by a piano string, and the other by oscillations of a reference vibrator. Such a device instrument makes it possible to perform tuning for people without training and tuning, as well as 1) to produce it silently and without any other side.

FIG. G depicts the nriptsnpialpa scheme iribor.a; in fig. 2-form of a vortex of the standard vibrator, on fng. 3-form vnolnen.i and holder-elekt1) omagnet.

The device consists of two electrical 1PP renejaypoB with an obgtsei stitch d.: 1 current measurement with a milliammeter / and a total 6aTj, peeii 2. In a hcpiioro generator, a small electromagnet L is attached above a tunable string 3 piano but with T1omopiu neighboring scabs.

In the penalty of the second (reference) generator is ana.chogichny electromagnet. And, which can be set against any of eighty-four (according to the number of Klavish;) steel ir) volchek, 1P, 1x and adjusted so that the frequency nx of the natural vibrations 1N1Y strictly corresponds necessary) stream forten but (from 27.5 to 3520,)

All wires are nomenued in a round box 4, outside of which)) Nahsdits l-inp pen 5 with a stainless steel indicator strip. The iroserki box pls, mbnr and is li) H, key; And; 1 switches 6

oscillation frequency of all

and designate 1 note of notes, accumulated by one vib) by the standard of piano 7 7 yenn each nz generator Al; 91041

NIN strings pl. P013 p; ki. Portspigometry. Ri R the magnitude of both currents is set approximately on the basis of a uniform and half a milliammeter 1 scale.

When the frequency of the stationary wave approaches the frequency of the reference, beats with a frequency, differences of both frequencies, and ir occur in the price of the iribor; the boron starts to fluctuate from 0 to the extreme. With the tuning of the string, the vibrations become progressively / slowly, and finally, completely cease with perfect tuning.

It is almost sufficient to achieve slow arrow oscillations, at low tones and fast - ;; and high. The telephones 8 are used for coarse tuning and for orienting the tuning direction (pull or release).

The holder .9 of the electromagnet 10. voz;, waiting for the strchporfortep but equipped with a bracket // with (for zak) warming it on adjacent strings.

FIG. 3 depicts three n.streyaeee 12.

PRED; LE; : and 3 about b} e e; - and

Claims (3)

1. Electric device d, 7g; tuning tuned but distinguished by the mingling of two electronic generators with electromechanical converters and indors; 1 with a beat beat generator, of which one is determined by a piano string, and the other by oscillations of a reference steel vibrator. 2. A form for performing a set of reference vibrators according to claim 1, characterized in that the vibrator (n. String string) is arranged circumferentially inside the sealed cylindrical box, and the electromagnet which is swelling them is installed using the output knob of any given vibrator outside. 3. An embodiment of an electromagnet holder which excites a piano scab, which is characterized by the use of a clip with a clip for fastening the holder to adjacent strings. h.LL Phage. 2