Patent GB-145139-A (GB)
Title: Improvements in or relating to taximeters
IPC: G07B13/00
Filed: 1919-03-22
Abstract: 145,139. Phillips, F. W. March 22,1919. Taximeters.-The flag-shaft is rotatable in one direction only and is interlocked with a releasing- spindle to prevent the flag-shaft from being rotated through more than one step at a time. Cams on the flag-shaft are arranged to control a cover for the fare dials, a plate exhibiting the " hired " or other condition, and mechanism for stopping the clock during vehicle stoppages, for disconnecting the road and time drives and for zeroizing the fare dials. Counters are provided for totalizing the number of hirings, the fare increments and the distances run. Flag-mechanism.-Movement of the flag-shaft 62 in one direction only is ensured by a pawl and ratchet-wheel 74, 73 and correct setting of the shaft in each of its three positions is obtained by a spring-controlled roller 77 engaging a trefoil cam 75 on the shaft. Forward motion of the shaft is normally prevented by a pawl 79 engaging a notched disk 83 but adapted to be tripped by a pin 89 on a disk 88 fixed to the releasing-spindle 84. When, in order to permit the flag to be moved, this spindle is rotated clockwise, a nose 92 on the disk 88 enters between two pins 90, 91 on the disk 83 and the pin 89 engages the pawl 79 and releases it from the notched disk 83. The shaft may now be turned anti-clockwise, and in so doing the pin 91 rotates the disk 88 sufficiently to cause the pin 89 to pass the pawl 79 so that the latter is free to engage the succeeding notch 82 in the disk 83. While the pawl 79 is out of engagement, the disk 88 is prevented from effective rotation owing to the pawl raising a catch 94 into engagement with a shoulder on the disk. Each setting of the flag shaft is signalled audibly by operation of a bell-hammer by means of one of the three projections on the shaft. The positions of the flag are indicated on the front face of the instrument by a sliding plate bearing the necessary wording and moved with relation to the reading aperture by a slotted lever 142 operated by a pin 144<a> on a lever 144 positioned by a threestepped cam 145 on the flag-shaft. Arresting clock during stoppages.-When the flag is set to " stopped,'' the balance-wheel of the clock is held by a blade spring 109 on a lever 108 operated by a cam on the flag-shaft. Movable shutters for fare-reading apertures.- The shutter 22 is carried by a spring-controlled lever 110 bearing on a cam 114 on the flag-shaft so that the apertures are covered when the flag is in the " for hire " position. Resetting-mechanism, arrangement of.-Various cams for resetting the fare dials and controlling the driving elements are mounted on the flagshaft and some of these are screwed upon the shaft in juxta position. A cam 115 operates a lever 116 so as to raise the vehicle-motion transmitting lever 18 into inoperative position, this also lifting a pinion t so as to disconnect the clock drive, and through a roller 43 disengaging a feed-pawl lever 36 from the shillings dial. A pin 122 on the lever 36 simultaneously rocks a lever 33 so as to disengage a detent 32 from the dial. The same movement of the lever 18 raises a pin 17 so that a lever 9 rocks to disengage its driving-pawl 10.from the pence-dial ratchet-wheel. The zeroizing of the various dials is performed bv levers carrying rollers which co-operate with heart-cams on the dial spindles. In the case of the concentric shillings and pounds dials, a bifurcated lever 130, 131 is rocked by a cam 133 and carries rollers for engaging heart-cams on the shillings and pounds spindles. A projection 139 on the lever raises the lever 50 to disengage the transfer pawl 52 for the pounds dial during the zeroizing movement. The Specification refers to concurrent Specifications 145,381 and 145,382.