Patent GB-310778-A (GB)
Title: Improvements in taximeters
IPC: G07B13/00
Filed: 1928-01-30
Abstract: 310,778. Waddington Tamperproof Taximeters, Ltd., and Waddington, A. S. Jan. 30, 1928. Taximeters &c.-In a taximeter a single lever actuated by movement of the flag is provided for controlling the operation of the meter actuating devices, the operation of the shutter for the fare indicators, the actuation of the additional charge indicators, and the actuation of the distance and operation registering mechanism. Means are also provided for effecting a rapid movement of the control lever to render the meter operative or inoperative. Flag and setting spindle mechanism. -The flag spindle 4, Figs 4 and 5, has secured thereto a positioning cam 5 engaged by a roller 6 on a spring controlled lever 7 a ratchet wheel 10 engaged by a pawl 11 for preventing reverse movement, and a cam 13 with which engages one arm 14 of a threearmed lever 14, 16, 18. The second arm 16 is attached to one end of a spring 17 and the other arm 18 has a projection co-operating with an arm 20 of a lever 20, 22, the arm 22 of which has a pin 23 engaging the slot 24 of a control lever 25, 27 normally held in the position shown in Fig. 3 by a projection 28 on the cam 13. Passing through the flag spindle 4 is a spindle 35, Fig. 7, with a hand knob 36, Fig. 4, and a pin 34 co-operating with a trip 33 on a spring controlled pawl 31. The pawl 31 normally engages a proiection 29 on the boss of the cam 13 to lock the flag in the " For Hire '' position. When it is desired to move the flag to the " Hired " position the knob 36 must be rocked clockwise until the pin 34 is below the trip 33 and then returned so as to raise the pawl 31 and free the projection 29 to permit the flag to be moved. This movement rotates the cam 13 to rock the three armed lever so as to move the projection 19 clear of the arm 20. At the same time the projection 28 of the cam 13 moves clear of the control lever which under spring action moves from the position of Fig. 3 to that of Fig. 5. On the movement of the flag to the " For Hire " position the portion 13<a> of the cam 13 causes a sudden return movement of the three armed lever, through the action of the spring 42', and that of the shutter, the projection 19 thereof rocking the lever 20, 22 to restore the control lever 25, 27 which is held in normal position by the pin 28 while the pawl 31 is moved to engage the projection 29. Actuating details.-Movement of the control lever releases a pivoted arm 37, Fig. 2, and permits downward movement of an arm 42 pivotally mounted on a spring controlled arm 44, the arm 42 carrying a pawl 41 with a pin 40 resting on the arm 37. A projection 46 is thereby moved into engagement with a toothed wheel actuated in a known manner from the vehicle wheel or clock drive. The movement imparted to the arm 42 is transmitted by the pawl 41 to a ratchet wheel associated with the units fare drum loosely mounted on the shaft 50. The rate of movement is controlled by an air brake (not shown) the arm 59, of which is slotted to engage a pin 57 on the arm 44. Shutter mechanism.-Freely mounted on the shaft 50 is a spring controlled shutter 53 with a slotted extension 55 engaging a pin 56 on the arm 37 so that the movement thereof displaces the shutter to expose the fare drums. Additional charge register.-The setting of the " Extras " indicator, 116, Fig. 1, is effected by the rocking movements of a hand lever 96, Fig. 2, through a shaft 91, arms 99, 101, pawl 103, and ratchet wheel 107, the maximum charge being reached when a pin 108 on the wheel moves to the other side of a fixed pin 109 opposite to that shown in Fig. 1. This setting movement is not permitted until the control lever has been moved as the said lever controls the position of a lever 85 the lower end of which engages a sliding clutch on the shaft 91, a movement of which clutch is necessary to couple the shaft to the hand lever 96. At the same time, through a projection 115 on the arm 44, a pin 113 on a pawl 111, that is connected by a spring 110 to the pawl 103, is moved into engagement with the ratchet wheel 107. Movement of the flag to the " For Hire " position disengages the clutch and withdraws the pawl 111 to permit the indicator 116 to return under spring action. With fare and distance totalizers.-A counter 132, Fig. 12, is provided for indicating the number of times the units fare drum has been actuated and is actuated by a pawl 133 on a lever 134 through a lever 135, Fig. 2, controlled by a pin 139 on the pawl 41. The counter 140 for registering the number of times the " extras " mechanism is operated is actuated by a pawl 141 controlled by an arm 144 secured to the spindle 91. The trip mileage counter 149 is actuated by a pinion 151 on a rocking frame 152 movable under the control of a projection 153 on the arm 44 into engagement with a pinion on the total mileage counter 145 driven in the usual manner by the road wheels. The number of times the flag is moved to the " Hired " position is registered on a counter 154 actuated by a pawl 155 on a lever 156 controlled by the projection 153 on the lever 44.