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    • 6. 发明专利
    • USING IMPOSSIBILITY DISPLAYING DEVICE FOR PUBLIC TELEPHONE SET
    • JPS6318859A
    • 1988-01-26
    • JP16206286
    • 1986-07-11
    • TAMURA ELECTRIC WORKS LTD
    • ASADA KAZUOTAKEDA YOSHIAKIASANO HIROYUKI
    • H04M17/00
    • PURPOSE:To execute the miniaturization and low power consumption by masking the entry character of an indicator, changing the sending condition of a driving pulse in accordance with the case that a control part or a voltage detecting circuit sends the detecting output, and displaying the entry character while a driving circuit sends the mutually reverse phase driving bias to the indicator. CONSTITUTION:An indicator (LCD) 23 of a liquid crystal panel, etc., is provided to which a character 22 of 'using impossibility' is written to a displaying surface 21 such as glass, for example, by the black color. When a control part (CNT) 8 detects the using impossibility by the self-diagnosing. An output C of an interface (I/F) 26 comes to be an 'L,' in a pulse shape in accordance with the detecting output. For an LCD23, driving pulses P1 and P2 impressed to terminals T1 and T2 come to be the same phase, these are changed from the condition of the reverse phase, and then, these are transferred to a noncoloring condition, a ground color comes to be, for example, white, and therefore, the displaying condition to be able to clearly confirm the character 22 is obtained. Consequently, only by adding a number of the circuit, the displaying of the using impossibility, which is inexpensive, small-sized, light and is executed by the LCD 23, can be executed even after the power source is turned off.
    • 8. 发明专利
    • PUBLIC TELEPHONE SET
    • JPS61194967A
    • 1986-08-29
    • JP3368185
    • 1985-02-23
    • TAMURA ELECTRIC WORKS LTD
    • KINOSHITA TOSHIJITAKEDA YOSHIAKI
    • H04M17/00H04M17/02
    • PURPOSE:To prevent a no-charge call by driving a call compulsory disconnecting circuit when the next charging signal is not received within a specified time during a timer operation. CONSTITUTION:A CPU 109 starts a charging check timer that is provided utilizing a prescribed memory area and confirms that an answer flag which shows the presence/absence of reception of a first charging signal (including a dummy signal) is set or not. And next, the CPU 109 starts a charging timer. This is to perform a terminal multi-charging after a second charge. Afterwards, by monitoring the end flag of the charging timer, the timer is restarted at every setting of the end flag and a process is moved to a containing process. On the other hand, when a timer time elapses without the setting of the answer flag, after the charge checking timer is started, the CPU 109 judges that the reception of the charging signal is prevented by some reason and completes a containing decision process by setting a hook flag and moves to a hook process and therefore prevents a no-charge call by disconnecting the call compulsorily.
    • 9. 发明专利
    • PUBLIC TELEPHONE SET
    • JPS60137164A
    • 1985-07-20
    • JP24425383
    • 1983-12-26
    • TAMURA ELECTRIC WORKS LTD
    • KINOSHITA TOSHIJIOYAMADA TAKASHITAKEDA YOSHIAKI
    • H04M17/00H04M17/02
    • PURPOSE:To discount the telephone charge in a discount time zone automatically as to a public telephone set by calculating a charging constant on the basis of a destination area number detected from a dial origination number and data time and a day of the week obtained by a timer means. CONSTITUTION:The public telephone set detects the destination area number by the CPU7 from the dial oridination number after the handset 14 is put off the hook. A subordinate unit 20 and a storage mechanism 21 are put in operation with a signal from a polarity inversion receiving circuit 10 which operates when a called subscriber answers. The subordinate unit 20 refers to the table stored in EPROM24 on the basis of the destination area number detected by the CPU7 and data on time, a day of the week, etc., from a timer circuit 20. This table contains area numbers and the unit telephone charge and discount charge corresponding to the area numbers, and the telephone change corresponding to the time is displayed on a display device 19. Further, the unit 20 measures the material, diameter, thickness, etc., of each thrown-in coin by a measuring circuit 23 and controls the storage mechanism 21 to accept correct coins.