US3696234A - Word number counting device - Google Patents

Word number counting device Download PDF

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Publication number
US3696234A
US3696234A US82441A US3696234DA US3696234A US 3696234 A US3696234 A US 3696234A US 82441 A US82441 A US 82441A US 3696234D A US3696234D A US 3696234DA US 3696234 A US3696234 A US 3696234A
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Prior art keywords
input
output
circuit
counter
depression
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Expired - Lifetime
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US82441A
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English (en)
Inventor
Emiko Yamashita
Kyohei Fujimoto
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/20—Arrangements of counting devices
    • B41J29/24—Word counters

Definitions

  • ..H03k 21/04 circuit activated to advance a counter "P the 5 Fie
  • the basic principle of the present invention exists in that an electronic circuit is associated with the key operation of the typewriter to identify each word, and that an indication of the word number is obtained in a counter or on a count display device connected to said electronic circuit.
  • FIG. 1 is a block diagram of an electric circuit in one preferred embodiment of the present invention
  • FIG. 2 is a diagram showing various waveforms appearing at various points in the circuit illustrated in FIG. 1 for exemplifying one example of operation of the device.
  • reference numeral 1 designates a flip-flop which has a set input 2 and a reset input 3 and which is constructed in such manner that when a switch 4 or 5 is closed said flip-flop 1 may be set or reset, respectively.
  • the flip-flop circuit per se is well known and it is also well-known that the flip-flop 1 can be constructed in the above described manner, a more detailed description with respect to the circuit will not be given here.
  • the flip-flop l is further provided with an output terminal 6, from which an output can be obtained when said flip-flop 1 is reset. In the illustrated example, the arrangement is such that when said flip-flop l is set, the output at the terminal 6 may fall from a higher level to a lower level, and then this output is applied to a differentiator circuit 7.
  • the differentiator circuit 7 differentiates the negative-going signal emitted from the terminal 6 to produce a negative pulse when said flipflop l is set, and thereby actuates a mono-stable multivibrator 8.
  • This mono-stable multivibrator 8 is constructed in such manner that it may be actuated only by a negative pulse input.
  • An output of said mono-stable multivibrator 8 is connected to a counter 10 via a switch 9.
  • the counter 10 may be of any type, so far as it is designed so that it may increase its count by one upon each receipt of one pulse from the mono-stable multivibrator, and for example, an electromagnetic type of counter may be employed.
  • the arrangement is such that the switch 4 may be closed only when a character key is depressed, and that the switch 5 may be closed only upon the actuation of the space bar or the carriage return and line space lever. Provision is made such that the switch 9 is normally closed but is opened upon operation of type keys which is not wanted to be counted into the number of words, for instance, upon typing of numerals or symbols, whereby when the nu merals, symbols, etc. have been typed, even if the space bar is actuated, it is enabled to prevent these from being counted in the counter 10.
  • FIG. 2 is a diagram showing waveforms at the respective points in the circuit illustrated in FIG. 1 for exemplifying one example of operation, in which the first word consists of four characters. Then, although the switch 4 is closed four times in response to the actuation of the character keys of four times, the flip-flop l is set by the first set-input (closing of the switch 4) and not changed in state, so that the set state is not affected by the number of characters contained in one word. In this connection, of course, we have assumed that prior to the actuation of the first character key, the flip-flop 1 has been reset by the actuation of the space bar or the carriage return and line space lever.
  • the flip-flop 1 When the flip-flop 1 is set (at time t,), the output at the terminal 6 falls to the lower level and due to the negative-going signal at this moment, that is, due to the descending end of the output the differentiator circuit 7 generates a negative pulse, which triggers the mono-stable multivibrator 8 so that its output may increase the count in the counter 10 by one (as shown by a positive wide pulse at 8). Thereafter, the flip-flop 1 receives three set-inputs (shown as pulses at 4) in response to the succeeding actuation of the characters keys as illustrated in FIG. 2, and then again in response to the actuation of the space bar or the carriage return and line space lever (at time t the flip-flop l is reset.
  • the space bar could be actuated repeatedly to reserve a desired length of space. As illustrated by a broken line in FIG. 2 (at 5), since the flipflop l is kept in the reset state without change, such a repeated actuation of the space bar does not affect upon the count at all.
  • the switch 9 is opened manually or automatically in a linked manner with specific keys, then the mathematical equation or the like can be omitted from the counting of the word number.
  • a typewriter since a typewriter is generally provided with a common bar or bail to be actuated by the key depressed for typing in order to select the desired type, it can be simply mounted by disposing a compact microswitch adjacent to this bar or bail so that the switch 4 may be closed by this bar or bail.
  • a compact microswitch adjacent to this bar or bail so that the switch 4 may be closed by this bar or bail.
  • the respective switch contacts actuated by the character type keys for energizing the respective typing relays may be commonly used for actuating the set-input switch 4, as by connecting the respective key contacts commonly but through respective decoupling diodes to a winding of a relay whose make contacts serve as said set-input switch 4.
  • the keys for which the counting is to be omitted are removed from the common connection to the set-input relay switch 4.
  • the switch contacts for the space key and the carriage return and line space key can be connected together through the respective decoupling diode to a winding of another relay switch which serves as the reset-input switch 5.
  • the device according to the present invention can be formed compactly and can be operated either by a battery or by an AC. power supply line, the utility thereof is not limited to an electromotive typewriter, but it can be equally applied to a common mechanical typewriter.
  • a word number counting device for use in conjunction with a typewriter comprising:
  • a flip flop circuit having a first and second input, said first input being activated by the depression of a type key in the typewriter and said second input being energized by the depression of the space bar or the carriage return, such that upon energization of said second input the flip flop circuit is reset;
  • said circuit also having an output, said output being a negative signal when the first input is activated at least once and a positive signal when the second input is energized once,
  • a difl'erentiator circuit being activated by said negative signal to emit a negative pulse and by said positive signal to emit a positive pulse
  • a mono-stable multivibrator activated to generate and output only by the negative pulse from said differentiator circuit
  • said disconnecting means comprises a switch linked to at least one of said type keys such that upon the depression of said key said counter will not be advanced.

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Input From Keyboards Or The Like (AREA)
US82441A 1969-10-25 1970-10-20 Word number counting device Expired - Lifetime US3696234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8500969 1969-10-25

Publications (1)

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US3696234A true US3696234A (en) 1972-10-03

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Application Number Title Priority Date Filing Date
US82441A Expired - Lifetime US3696234A (en) 1969-10-25 1970-10-20 Word number counting device

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US (1) US3696234A (enrdf_load_stackoverflow)
DE (1) DE2051752A1 (enrdf_load_stackoverflow)
GB (1) GB1305576A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853266A (en) * 1973-12-19 1974-12-10 H Chaskin Counting system for printed material

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1617774A (en) * 1926-01-26 1927-02-15 Steven J Smith Typewriter word counter
US1798707A (en) * 1927-04-30 1931-03-31 Underwood Elliott Fisher Co Typewriter word counter
US2297180A (en) * 1941-07-21 1942-09-29 Walsh Edward Arthur Typewriter word counter
US2421683A (en) * 1944-03-20 1947-06-03 Chaskin Harold Typewriter word counter
US2435450A (en) * 1945-05-02 1948-02-03 Carl W Lamb Word counter for typewriters
US2907519A (en) * 1953-12-22 1959-10-06 Rca Corp Apparatus for and method of counting perturbations in a field
US3346725A (en) * 1964-07-10 1967-10-10 Gen Motors Corp Commutator pulse counting apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1617774A (en) * 1926-01-26 1927-02-15 Steven J Smith Typewriter word counter
US1798707A (en) * 1927-04-30 1931-03-31 Underwood Elliott Fisher Co Typewriter word counter
US2297180A (en) * 1941-07-21 1942-09-29 Walsh Edward Arthur Typewriter word counter
US2421683A (en) * 1944-03-20 1947-06-03 Chaskin Harold Typewriter word counter
US2435450A (en) * 1945-05-02 1948-02-03 Carl W Lamb Word counter for typewriters
US2907519A (en) * 1953-12-22 1959-10-06 Rca Corp Apparatus for and method of counting perturbations in a field
US3346725A (en) * 1964-07-10 1967-10-10 Gen Motors Corp Commutator pulse counting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853266A (en) * 1973-12-19 1974-12-10 H Chaskin Counting system for printed material

Also Published As

Publication number Publication date
GB1305576A (enrdf_load_stackoverflow) 1973-02-07
DE2051752A1 (de) 1971-05-06

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