| 摘要 |
<p>1,209,245. Electric vehicles. J. JARRET, and J. JARRET. 21 March, 1968 [22 March, 1967; 7 April, 1967], No. 13781/68. Heading B7H. [Also in Divisions G1 and H2] A three wheeled vehicle having a castor wheel 10 is propelled and steered by controlling the energization of separate electric motors coupled to respective rear driving wheels, the controller comprising a ball mounted control lever 31. This may be coupled to the sliders of potentiometers (Fig. 4, not shown) connected in a bridge circuit across a battery and arranged to smoothly vary the frequency and polarity of pulses supplied from a separate battery to the motors, using known, undisclosed, circuits. In an alternative arrangement (Figs. 5, 6, not shown) the lever is linked to two pivoted plates having windows by which light reaching photodiodes is varied (see Division G1). The control devices are preferably mounted at right angles, but may be between 60 to 120 degrees, the arrangement being that forward and backward movement of the lever produces equal forward or reverse energization (for braking or reversing) of the motors while sideways movement energizes one motor more than the other. Backward movement may also apply mechanical brakes. The motors may be of the self-commutating, variable reluctance type described in Specification 1,105,767 (Heading H2A). Mention is made of the use of nutual inductors in place of the potentiometers or photo-electric devices described.</p> |
