Patent GB-190602329-A (GB)
Title: Improvements in or relating to Electrically Propelled Vehicles.
Inventor: PEATISCHER MATHIAS
Filed: 1906-01-30
Granted: 1907-01-30
Abstract: 2329. Pfatischer, M. Jan. 30. Electric locomotives and motor-vehicles; collectors. -Relates to that class of electrically propelled vehicles which can be driven directly by current supplied from an overhead wire or the like, and can also be driven along a trackless road by electric energy stored in an accumulator, as described in Specification No. 11,264, A.D. 1904, and consists in providing a direct-current rotary transformer receiving current at high voltage from the supply system and giving out current at a lower voltage to the motors, which are arranged in parallel with the accumulator in the secondary circuit. The output of the transformer is maintained substantially constant by a governor adapted to cut out resistances from the primary circuit. Fig. I shows the electric connexions for one modification, Fig. II showing the arrangement of the parts on the vehicle. The primary circuit of the trans- . former is completed through a switch 8 and contact 9, and passes through an automatic starting- resistance 12, resistance coils 17 adapted to be cut out by the governor 39 and the transformer armature 22, to earth. The resistances 12 are cut out by a solenoid 29, the core of which carries a switch bar 13 and dash-pot plunger 27. The switch lever 8 is also adapted to bridge the terminals 67, 68 and close the circuit of the field coil 71 and accumulator 73. The accumulator terminals are also connected through the resistance 56 and switch 46 to the commutator 52 of the transformer. The permanent resistance 56 checks any tendency of the current suddenly to increase by reason of its resistance increasing with its temperature, and the switch 46 automatically closes the circuit when the switch-lever 8 is operated, the lever 43 being knocked over by the solenoid core 28. The controller 58, which is arranged to put the motors 63, 64 in series or in parallel and to reverse, is connected to the accumulator terminals by wires 55, 59. Any increase in speed of the armature shaft of the transformer causes resistances to be placed in the primary circuit, so that the current in the secondary circuit is maintained substantially constant. Referring to Fig. II, the transformer 89 is supported beneath the driver's seat, and the controller 58 is arranged on the platform. The accumulator 73 is carried under the body of the vehicle. The trolly pole 2 is hinged on a pin 95 on the standard 96, and is raised and lowered by vertical movements of a collar 98 having a flexible connexion to a hand-lever 101, which also controls the movement of the contact-wheel 4. In , a modification, shown in Fig. III, four motors 134 are used and are adapted to be driven directly from the supply wire 112 without the intervention of the transformer. The transformer in this case is of the motor-generator type, and the governorcontrolled resistance 147 is placed in the field circuit 145 of the generator member of the transformer. A switch 126 is adapted, when in the position shown in full lines, to complete the direct circuit from the supply wire to the controller, and, when in the position indicated in dotted lines, to complete the circuit from the transformer to the controller. The controller handle may be arranged to operate the switch so that, when the latter is in the position shown, the motors 134 are connected in series. Resistance switches 201, 120 are arranged to control the speed of the vehicle. The four motors may be arranged in operative relation with the four wheels of the vehicle.