US3873811A - Taximeter having device for electronically setting increased base fare rate - Google Patents

Taximeter having device for electronically setting increased base fare rate Download PDF

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Publication number
US3873811A
US3873811A US415680A US41568073A US3873811A US 3873811 A US3873811 A US 3873811A US 415680 A US415680 A US 415680A US 41568073 A US41568073 A US 41568073A US 3873811 A US3873811 A US 3873811A
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United States
Prior art keywords
fare
taximeter
motor
rate
increased base
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Expired - Lifetime
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US415680A
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English (en)
Inventor
Noboru Ozaki
Masatoshi Shimizu
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Yazaki Corp
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Yazaki Corp
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Publication date
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B13/00—Taximeters
    • G07B13/02—Details; Accessories
    • G07B13/08—Tariff-changing arrangements

Definitions

  • ABSTRACT A taximeter having no speed governor and provided [30] Foreign Application Priority Data Dec. 1, 1972 with a device for electronically setting an increased base fare rate, comprising an electronic oscillation circuit for generating a train of pulses for driving a taximeter drive motor, and means for varying the time constant of the oscillation circuit thereby counting the fare at a selected increased base fare rate.
  • Prior art taximeters employ a clock mechanism which consists essentially of a power source means such as a hand-actuated power spring, a solenoid or a drive motor, a speed governor and a train of geared wheels.
  • a power source means such as a hand-actuated power spring, a solenoid or a drive motor, a speed governor and a train of geared wheels.
  • the inherent complexity of this clock mechanism has been disadvantageous in respect of production costs and has resulted in an increased tendency toward possibility of mal-operation and trouble.
  • some taximeters are designed for counting the fare on the basis ofa predetermined time and various increased base fare rates are approved in some districts.
  • the prior art clock mechanism adapted for merely counting the increased base fare on the basis of the predetermined time is not suitable for the purpose and some means for counting, for example, a 20 percent increased base fare and a 30 percent increased base fare must be added to the taximeter.
  • the clock mechanism has the inherent property of punctuality due to the fact that the speed governor is employed therein. Therefore, means for setting these increased base fare rates must be disposed in the stage after the stage including the speed governor,
  • provision of such means consisting of mechanical parts adds another complexity to the taximeter and is difficult in view of the limited space available for the taximeter presently widely used.
  • FIG. I is a wiring diagram of an electronic circuit in a taximeter according the present invention.
  • FIG. 2 is a diagrammatic view showing the arrangement of a gear train for transmitting power from a drive motor to a clutch means;
  • FIG. 3 is a schematic perspective view showing the arrangement of the drive motor, gear train, clutch means and fare display drum;
  • FIG. 4 is a schematic perspective view of part of the taximeter when viewed from the side opposite to that shown in FIG. 3;
  • FIG. is a schematic sectional view showing the driving connection between a drum advancing ratchet wheel and the fare display drum.
  • a taximeter according to the present invention includes a clock mechanism which comprises a pulse generator as shown in FIG. 1, a gear train as shown in FIGS. 2 and 3, a clutch means as shown in FIGS. 3 and 4, and fare counting means as shown in FIGS. 3 to 5.
  • the electrical circuit shown in FIG. 1 is printed on a printed circuit board and is divided into a plurality of sections A to F surrounded by the dotted lines.
  • the section A is a constant-voltage power supply means which is composed of a stabilizing resistor Rs and a Zener diode ZD and regulates the variable voltage of the power supply in the vehicle to a constant voltage for supplying this constant voltage to the section B.
  • the section B is an astable multivibrator which is composed of transistors T T capacitors C C C C resistors R,, R R R and semi-fixed resistors VR VR VR for generating a train of clock pulses.
  • An externally actuated changeover contact 10 is provided in the section B for selectively connecting one of the variable resistors VR,, VR and VR in series with the resistor R
  • the time constant determined by this resistor R selected variable resistor and capacitor C determines the oscillation frequency of the astable multivibrator. Therefore, the'base fare rate such as the non-increased base fare rate, 20 percent increased base fare rate or 30 percent base fare rate can be set as desired by selecting one of these semi-fixed resistors and varying the frequency of the clock pulses.
  • the rectangular waveform collector output of the transistor T g in this astable multivibrator is applied to the section C.
  • the section C includes a differentiator which is composed of a capacitor C and a resistor R for differentiating the rectangular waveform collector output of the transistor T
  • the output of the differentiator is applied to the section D through a steering circuit which is composed of diodes D D and D
  • the section D is a bistable multivibrator which is composed of transistors T T capacitors C C C and resistors R R R R R
  • the section D delivers an output having a waveform such that the frequency of the output of the section B is divided into [2.
  • the section D is provided for obtaining a waveform having a 0" level and a "1 level of equal duration due to the fact that the 0 level and l level in the output waveform of the section B are not equal to each other and this output waveform is not suitable for causing rotation of a drive motor 16.
  • the section E is a motor driving circuit which acts to amplify the output of the section D (appearing at the collector of the transistors T,;, and T,.,) by transistors T to T for driving the motor 16.
  • Diodes D and D are provided for preventing application of a surge voltage.
  • the section F includes the winding M of the motor 16.
  • the motor 16 is rotated by alternately flowing current through the portions on opposite sides of the central point, and the number of revolutions of the motor 16 is proportional to the frequency of the current supplied to the winding M.
  • This motor 16 is of the type which is commonly called a bifilar timing motor in the art.
  • the drive motor 16 having a structure as above decribed rotates at one of a plurality of speeds depending on the position of the externally actuated changeover contact 10 in the oscillator mounted in the taximeter. For example, the motor 16 rotates at a speed of 250 rpm.
  • This drive motor 16 is reduced by a train of gears Z to Z which are supported together with the motor 16 on a mounting plate 12 fixed to another mounting plate 13 as shown in FIGS. 2 and 3, and the increased torque is transmitted to a clutch means 15.
  • This clutch means 15 is selectively actuated depending on the running condition of the taxi sothat the fare can be counted on the basis of the distance run by the taxi or on the basis of the time lapsed during running. Taximeters presently widely employed are designed to count the fare onthe basis of the time when the running speed of the taxi is reduced to less than Km/h in the district in which the fare is counted on the basis of both the distance and the time.
  • the rotation of the clutch means causes rotation of a cam 19 in a direction shown by the arrow in FIG. 4 for counting the fare.
  • a drum advancing lever 17 having a pawl 23 at one end thereof is pivoted at the other end thereof to a mounting plate 11 as shown in FIG. 4.
  • a counter lever spring 21 is anchored at one end thereof to the plate 11 and at the other end thereof to a pin fixed to the lever 17 so as to ensure rolling engagement between a roller 18 pivoted to the lever 17 and the cam 19.
  • the rotation of the cam 19 in the direction shown by the arrow in FIG. 4 causes vertical swinging movement of the lever 17 in directions shown by the arrows.
  • This vertical swinging movement of the lever 17 causes rotation of a ratchet wheel 22 in a direction shown by the arrow by the action of the pawl 23 engaging with the ratchet wheel 22.
  • a gear 24 is mounted on the shaft of the ratchet wheel 22 for unitary rotation therewith and is in meshing engagement with a gear 25 mounted on the shaft of a fare display drum 14 as shown in FlG. 5.
  • the rotation of the ratchet wheel 22 causes rotation of the fare display drum 14 which counts the fare.
  • the taximeter of the present invention having a structure as above described, mechanical means for setting the increased base fare rate are utterly unnecessary due to the fact that such increased base fare rate can be set electronically. Further, the presentinvention is advantageous in that the speed governor is entirely unnecessary and a small-sized assembly having a simple construction can attain the complex function of setting the increased base fare rate. Thus, the taximeter according to the present invention can operate with very high precision and reliability.
  • a taximeter having fare indicating means and a device for electronically controlling a time signal generating mechanism to establish a base fare rate comprising:
  • an astable multivibrator including a plurality of variable resistors selectively in connection with a capacitor through an operator-actuatable switch;
  • a differentiator connected to the astable multivibrator, receiving and differentiating the output thereof;
  • a bistable multivibrator connected to said differentiator and receiving the output thereof and accordingly producing a symetrical square wave
  • a motor driving circuit interconnected between the motor and the bistable multivibrator for driving said motor at a rate commensurate with the frequency of the signal from the bistable multivibratOl'.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
US415680A 1972-12-01 1973-11-14 Taximeter having device for electronically setting increased base fare rate Expired - Lifetime US3873811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972137578U JPS49105157U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-12-01 1972-12-01

Publications (1)

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US3873811A true US3873811A (en) 1975-03-25

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US415680A Expired - Lifetime US3873811A (en) 1972-12-01 1973-11-14 Taximeter having device for electronically setting increased base fare rate

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US (1) US3873811A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS49105157U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU463296B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2209473A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1441795A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512621B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1975-02-12 1980-04-03

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249296A (en) * 1962-01-20 1966-05-03 Kienzle Apparate Gmbh Tariff setting arrangement for taximeters
US3703985A (en) * 1970-08-07 1972-11-28 Haldex Ab Taximeter arrangements
US3708762A (en) * 1970-06-02 1973-01-02 Ericsson Telefon Ab L M Electronic oscillator using r-c filter in which frequency is controlled by one resistor
US3764782A (en) * 1971-06-24 1973-10-09 Kienzle Apparate Gmbh Taxi meter with electronic fare computer
US3803828A (en) * 1972-10-12 1974-04-16 Timex Corp Resistor trim for quartz oscillator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249296A (en) * 1962-01-20 1966-05-03 Kienzle Apparate Gmbh Tariff setting arrangement for taximeters
US3708762A (en) * 1970-06-02 1973-01-02 Ericsson Telefon Ab L M Electronic oscillator using r-c filter in which frequency is controlled by one resistor
US3703985A (en) * 1970-08-07 1972-11-28 Haldex Ab Taximeter arrangements
US3764782A (en) * 1971-06-24 1973-10-09 Kienzle Apparate Gmbh Taxi meter with electronic fare computer
US3803828A (en) * 1972-10-12 1974-04-16 Timex Corp Resistor trim for quartz oscillator

Also Published As

Publication number Publication date
JPS49105157U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-09-09
GB1441795A (en) 1976-07-07
AU6304473A (en) 1975-05-29
FR2209473A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-06-28
AU463296B2 (en) 1975-07-24

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