SU1427356A1 - Contactless symbol encoder for typewriter - Google Patents

Abstract

The invention relates to computing and can be used to enter information into a computer. The purpose of the invention is to simplify / contactless encoder characters for a typewriter containing a set of letter levers of the keyboard mechanism. The encoder contains permanent magnets attached to the typewriter letter arms, under each of which there is a microtransformer with a lightly mounted core, equipped with excitation windings, a clock signal and code signals. The excitation windings of all microtransformers are connected in series and connected to the source of sine-nusoidal voltage. The sync signal circuit is formed by the series-connected windings of the sync signal of all microtransformers, the windings of the code signals of which are connected to serial discharge circuits in accordance with the character codes of the letter levers. 3 il. with ((L

Description

11427356

The invention relates to computing and can be used to enter information into a computer.

The purpose of the invention is to simplify contactless encoder characters.

Figs 1 and 2 provide a constructive arrangement diagram for the interacting parts of the contactless symbol coder; in FIG. 3, an elec- tric functional scheme of the decimal digitizer, made according to the invention.

A permanent magnet 2.1 is fixed to the frame of the letter levers 1.1 (figure 1), the letter type levers of the typewriter included in the set, under which the code signal sensor is installed, made in the form of a micro permanent magnet 2 in the initial position of the letter lever 1.1 .i p is laid directly above the microtransformer 3.1 and saturates its core. Therefore, in the presence of alternating current in the windings 4.1-4.10, in the windings 5.1-5.10 of the signal sync and in the windings 6.1-6.10 of the signal codes, an emf of small amplitude appears.

When pressing a key of any character, the alphabetic lever 1.1, turning around the point of attachment, displaces the permanent magnet 2.1 and, as a result, the permanent magnet will be removed from the microtransformer 3.1. As a result, the core of the microtransformer 3.1 will be

thirty

transformer 3.1 with a light saturation- 20 den of the end, resulting in a core, equipped with a winding

4.1 excitation (Fig. 2), the winding 5.1 of the clock signal and the windings 6.1 code signals (where, ..., K, K is the number of letter levers equipped with permanent magnets, determined by the number of characters to be encoded).

The windings 4.1-4.10 of the excitation (Fig. 3) of the microtransformers 3.1-3.10 (for encoding the decimal digits, respectively, from O to 9) are connected in series and connected, for example, to an AC network.

The windings 6.1-6.10 of the code signals are connected between the pile with the code of the symbol of the corresponding letter lever in serial bit circuits. The output of each bit circuit is connected to the input of an operational amplifier 7 connected by its output to the trigger input 8 of the corresponding bit of the symbol code ..

the amplitude of the EMF of the windings 5 and 6.1- will increase. The EMF of the windings of 6.1 code signals is supplied by bit circuits to the inputs of the corresponding operating 25 np (amplifiers 7, and the signals at the outputs of these amplifiers trigger the triggering of the corresponding EMF of the winding 5.1 sync signal after amplification by the operational amplifier 9 to the one-vibrator 10 input; in zero state

After releasing the key, the alphabetic lever 1.1 with permanent magnet 2.1 returns to its initial position. In the synchronization signal winding 5.1, the amplitude of the electromotive force (EMF) decreases and the single vibrator 9 returns to the one state. As a result of this, during the first imaging unit 11 a pulse is generated, which is a signal of the symbol code readiness. By cutting a certain length of time on the output of the second driver 12, a reset pulse is generated, which sets the flip-flops 8 of the symbol to the initial zero state.

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The windings 5.1-5.10 of the sync signal of all microtransformers 3.1-3.10 are connected in series with a sync signal connected to the input of an operational amplifier 9 connected by its output to the input of a single vibrator 10. The output of the one-vibrator 10 is connected to the input of the first imager 11 connected by its output to the input of the second driver 12, the output of which is connected to the fault inputs of the flip-flops 8.

Contactless encoder characters works as follows.

.In the initial position of the letter lever 1.1, the permanent magnet 2.i is located directly above the microtransformer 3.1 and saturates its core. Therefore, in the presence of alternating current in the windings 4.1-4.10 of the excitation in the windings 5.1-5.10 of the sync signal and in the windings 6.1-6.10 of the code signals, an emf of small amplitude occurs.

When you press a key of any character, the letter lever 1.1 rotates around the attachment point and moves the permanent magnet 2.1 in an arc, as a result of which the permanent magnet 2.1 will be removed from the microtransformer 3.1. As a result, the core of the microtransformer 3.1 will be

den

the amplitude of the EMF of windings 5.1 and 6.1- will increase. The EMF of the windings 6.1 of the code signals is supplied to the inputs of the respective operational lines (amplifiers 7, and the signals at the outputs of these amplifiers trigger the corresponding triggers 8. The EMF of the winding 5.1 of the sync signal after amplification by the operational amplifier 9 is fed to the input of the one-oscillator 10, setting it is in the zero state.

After releasing the key, the alphabetic lever 1.1 with a permanent magnet 2.1 returns to its original position. In the synchronization signal winding 5.1, the amplitude of the electromotive force (EMF) is reduced and the single vibrator 9 returns to a single state. As a result, a pulse appears at the output of the first driver 11, which is a signal for the readiness of the character code. After a certain length of time, at the output of the second generator 12, a reset pulse is formed, which sets the triggers 8 of the symbol code to the initial zero state.

Claims (2)

Invention Formula A contactless character encoder for a typewriter containing a set of letter keys of the keyboard mechanism, including permanent magnets and code signal sensors, is hindered by the fact that, for the sake of simplicity, a permanent magnet is attached to each of the letter keys of the typewriter code signal sensor, made in the form of a microtransformer with light-sapping with a core and equipped with a winding winding, a winding of a clock signal and windings of the code signals, and connected in series excitation windings of all microtransformers are connected to a source of sinusoidal voltage, series-connected windings of the sync signal of all 427356 4 microtransformers form a sync signal circuit, the output of which is the control output of the encoder, and - the windings of the code signals of the microtransformers are connected in accordance with the character codes of the letter levers into successive discharge circuits, the outputs of which are informative jQ output of the encoder. Z N Zj FU8.2 2.S 2.S 2.8 27 2.6 2.5 2, 2.3 2.2 2.1 DDDDDDDDDD 5, B 5.7 .6 5.5 .eight J .6 .five f ////// EVIL Z.e 3.8 3.7 3.6 3.5 3. 3.3 3.2 3.1 3.1 Fi.Z 5L 5.3 5.2 5L YU . if.3 ff.Z t.J