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New Ideas in Trolleybuses for Montreal

22nd May 1936, Page 49
22nd May 1936
Page 49
Page 49, 22nd May 1936 — New Ideas in Trolleybuses for Montreal
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Rear mounted Electrical Equipment an Important Departure from Normal Practice in A.E.C.-E.E.C.

Single-deckers

DESIGNED in conjunction with the Montreal Tramways Co., a new type of six-wheeled single-deck trolleybus is in course of production by the Associated Equipment Co., Ltd., Southall. The new machine is notable for its rear-mounted electrical equipment, which permits the provision of a wide front entrance on the off side, as well as a central entrance.

Another important advantage obtained by placing the contactors and resistances at the rear is that they may be quickly detached for repair or overhaul. Mounted as a compact unit, the equipment is carried on a subframe with insulated mountings. Permanent cable connections are provided.

The chassis follows the latest A.E.C.-E.E.C. design, modifications being made where necessary to suit the operating conditions in Montreal. For this reason the forward end of the off-side frame member is dropped to provide for a large entrance platform. Another modification concerns the rear bogie: the distance between the rearwheel centres has been increased to 4 ft. 4 ins, to allow clearance for snow chains. Mounted amidships on Floatex rubber bushes, the motor is carried on a tubular sub-frame, the drive being transmitted to the rear axle by a large-diameter propeller shaft equipped with Hardy-Spicer needle-roller couplings.

The electrical equipment provides for regenerative and rheostatic braking, whilst the foot-brake operates, through the compressed-air system, brakes on all six wheels.

Of all-metal construction, the 38seater body is a product of the M.C.W.

concern. As previously mentioned, two entrances are provided on the off side, both of which have double jack knife doors. A low-voltage treadle plate is incorporated in the bottom step of the centre exit. It is arranged so that the normal operating position of the control valve will open the front doors, which, when fully open, will make electrical contact with the treadle plate at the centre exit to permit operation by the passengers.

Alternative positions of the control valve set the treadle plate without opening the front door, whilst an emergency switch allows the doors to be opened independently of treadle operation. The whole of the door equipment has been made by G. D. Peters and Co., Ltd., Slough.

Electric heating is installed, with thermostatic control, and other features of the vehicle include low-voltage lighting, tubular-frame seats, with Dunlopillo upholstery, and Widney Stuart half-drop windows.

The wheelbase is 16 ft. 2 ins, and the overall width is 8 ft. In addition to the seating accommodation for 38 " passengers, room is available for a further 35 standing passengers, the springs having been designed to carry this overload.

This machine is one of a fleet being constructed for use in Montreal, where a number of A.E.C. Ranger single-deck buses is already in operation.

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Locations: Slough, Montreal

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