DE2051752A1 - Word number device coupled to a typewriter - Google Patents

Description

G 47 478

Emiko Yamashita, 6-50-315, 1-Chome, Akabanedai, Kita-Ku TOKYO (Japan)

Word counting device coupled to a typewriter

The invention relates to word counting apparatus coupled to a typewriter, and more particularly a device which continuously scans and counts the number of words written while sentences are being written

The basic principle of the invention is that an electronic Circuit controlled by the keystroke of the typewriter to identify each word and that a counter or a count indicator is connected to the electronic circuit, whichever indicates the word count.

When writing sentences with the help of typewriters, since a word consists of one or more characters or Consists of letters, the keys corresponding to the number of the

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ORIGINAL

Letters per word operated one or more times, and at the end of a word either the space bar is pressed to create a space or a carriage return and line toggle lever is operated to cause the carriage to reverse in conjunction with a line break. This allows every word to be identified. The electronic circuit must accordingly be constructed in such a way that it identifies each word by these typewriter functions as ^M a word "without using the key actuations assigned to each individual letter of the word as a switching criterion.

The device coupled to a typewriter according to the invention for counting words is characterized in that a counter by the combination of pressing the space bar or the carriage return and line shift lever and the actuation of type keys on the typewriter. In the following a preferred embodiment of the invention is explained in more detail with reference to the drawing. In the drawing shows:

Pig. 1 is a block diagram of an electronic circuit according to a preferred embodiment of the Invention; and

Pig. 2 is a diagram showing the at different points

the one in Pig. 1 circuit shown in an operating example occurring signal curves.

In Pig. 1, reference numeral 1 denotes a flip-plop with a set input 2 and a Hucksteileingang 3, which so is constructed so that it can be set or reset when a switch 4 or 5 is closed. Since the flip-flop 1 with the above-mentioned function represents a known component, will be referred to in the following on a detailed description of its No construction. The flip-flop 1 also has an output 6 at which an output signal is generated when the flip-flop 1 is reset. In the illustrated embodiment, the arrangement is made so that

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that the output signal at output 6 when flip-flop 1 is set drops from a higher signal level to a lower level, whereupon the output signal is fed to a differentiating circuit. The differentiating circuit 7 differentiates this negative going signal supplied by output 6 and generates a negative pulse when flip-flop 1 is set. A monostable multivibrator 8 is actuated by a negative pulse from the differentiating circuit 7. This monostable Multivibrator 8 is constructed in such a way that it can only be actuated by a negative input pulse. A The output signal of this monostable multivibrator 8 is fed to a counter 10 via a switch 9. The counter 10 can Any design, provided that when a pulse is received from the monostable multivibrator, it increases its count value by 1 elevated. So z. B. find an electromagnetic counter use.

When counting the number of words, since normally only the number of words consisting of letters has to be counted, the arrangement is made so that the switch 4 is closed only when a letter key is depressed and that the switch 5 is only closed when the space bar is pressed or the carriage return and return lever is closed . The switch 9 is normally closed, but is opened when type keys are pressed, which should not be included in the number of words counted, e.g. B. when actuating type levers which represent numbers or symbols. In this way, entry of posted numbers, symbols, etc. into the counter 10 is prevented even if a space bar has been pressed.

FIG. 2 is a diagram showing the points at corresponding points in the circuit shown in FIG. 1 in an example of operation occurring waveforms, where the first word consists of four letters. Although switch 4 corresponds to

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accordingly the four times pressing the letter keys is closed four times, the flip-flop 1 is only set with the first set pulse (closing of the switch 4) without changing its set state; the setting status is therefore not influenced by the number of letters contained in a word. Eb was of course assumed that the flip-flop 1 had been reset by pressing the space bar or the carriage return and line switch before pressing the first letter key. When the flip-flop 1 is set (at time t ^), the output signal at output 6 falls to the lower signal level, and the differentiating circuit 7 generates a negative pulse due to the negative signal or the falling edge at the end of the output signal, which triggers the monostable multivibrator 3 in such a way that its output signal increases the count of the counter 10 by 1 (as can be seen by the positive pulse at 8). The flip-flop 1 then receives three set pulses (waveform 4) depending on the subsequent actuation of the letter keys and is then _{reset when the space bar or the carriage return and line switch lever is actuated (at time t 2} ). At this moment a positive signal is developed at the output 6, and the differentiating circuit 7 generates a positive pulse. However, this positive pulse cannot actuate the monostable multivibrator 8. After pressing the space bar or the carriage return and line switch lever at time t _g , flip-flop 1 is set again if a letter key (sum time tj) is pressed, and the output signal at output 6 drops again to the lower level. Thereafter, the counter 10 is operated in the manner described above due to the negative going signal, so that its count is increased by one. This cycle is then repeated.

If necessary, the space bar can be pressed several times to create a certain distance. As if by a

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lint vomit line i-n Pig. 2 (at 5) is touched this repeated actuation of the space bar does not change the count of the counter, since the flip-flop 1 without any change in its Reset state is held. A math equation which appears within a written sentence can be excluded from the counting of the word number if the switch 9 is opened manually or automatically in conjunction with special keys.

The switch 4 can, for. B. in the following way in a typewriter be attached: Since a typewriter is generally equipped with a common bar or bracket is, which is operated when the selected key is pressed, the switch 4 can be used as a microswitch be mounted in the vicinity of this common rod or this bracket, so that it is closed by the rod or the bracket can be. It is also possible to use the holder 4 and 5 as semiconductor elements, e.g. B. as pressure sensitive diodes to form photoelectric elements, etc.

In the case of an electric typewriter, the corresponding switching contacts, which are activated by the letter keys the corresponding trip relays are actuated, common Actuation of the set switch 4 can be used, for example, by pressing the corresponding button contacts together via the associated Connecting decoupling diodes to a winding of a relay, deseen closing contacts serve as setting switches 4. In this case those keys that are not to be included in the count are of the common connection with the Set pulse relay switch 4 separated. In a similar way, the switching contacts for the space bar and the carriage return and line switch key together via the corresponding decoupling diode with a winding of another relay switch be connected, which serves as a reset input switch 5.

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Since the new device is designed to be very space-saving and operated either via a battery or an alternating current network its usefulness is not limited to electric typewriters, but can be used in the same way find use in an ordinary mechanical typewriter.

So far, counting the number of words has been carried out word for word after writing, i.e. in a very time-consuming and costly manner Way. However, using the new device, either The amount of work involved in counting the number of words can be avoided even though the number of words is precisely determined.

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Claims (6)

P at ent claims ; Device for counting words coupled to a typewriter, characterized that a counter (10) by the combination of the actuation (5) of the space bar or the carriage return and line switch lever and the actuation (4) of type keys of the typewriter is switched. 2. Apparatus according to claim 1, characterized in that the counter is only activated by the actuation combination advance by letter keys with the space bar or the carriage return and line shift levers will. 3. Device according to claim 2, characterized in that that in the signal connection to the counter (10) switched switch (9) is provided, the can be actuated by pressing a number or character key or independently to interrupt the signal connection is. 4. Device according to one of claims 1 to 3, characterized in that the counting input for the Counter (10) takes place via an electronic circuit, the input stage of which by a set input (2) and a reverse input (3) having flip-flop (1) is formed, the circuit being constructed so that a Counting input into the counter only with each first signal application of the set input (2) after the previous signal application of the reset input (3) takes place. 5. Apparatus according to claim 4, characterized in that the electronic circuit for counting input in the counter (10) has a monostable multivibrator (öj, which only Dei a change of state 10 9 8 19/1235 Flip-flops (1) send a count pulse to the in one direction Counter (10) delivers. 6. Device according to one of claims 1 to 5, d adurc marked that all letter keys the typewriter with a set input (2) of the flip-flop (1) connecting to a voltage source Switch (4) and the space bar and the carriage return and line shift lever with a rear part input (3) are coupled to the voltage source connecting switch (5).