With the
change from trams to trolley-buses, certain changes had to be made to the
system. Two negative wires had to be
fitted to the overhead, and turning circles had to be created. With a tram, if
you wanted to go the other way, you just got in the other end, but
unfortunately that does not apply to a trolley-bus. These circles were installed at
Additional
wiring was also provided through
The
so-called wire on the overhead was about half an inch in diameter with two
grooves to accommodate the securing clamps.I don't
know what the trolley heads were like on the trams and early trolleys, butlatterly they were carbon shoes clamped into bronze
housings. These were examined andreplaced almost
daily.
The heads
were a very substantial size, and it was arranged that, in the case of a dewirement, they would slide off the end of the pole before
they did any damage to the overhead, and a safety cord prevented them from
falling into the street. The electric supply in the early days was from the
Tramway's own generating station near Parker Rd. but in 1936 they changed over
to the Municipal supply.
I see that
you are all fidgeting with your gauntlets, and I did promise that I would teach
you how to drive a trolley-bus so here goes! Hoist yourself into the cab and
make yourself comfortable. The handbrake is to your right hand side. There are
two pedals, the right hand one which is about the size of a wellington
boot is the controller. The left pedal is the brake. You have only to touch this one and the power
to the motor goes off. Normal pressure gives electrical braking, but ifyou use heavy pressure you come on to the air-brake and
in an emergency it can almost pull the chassis off - believe me.
Forward
and to your left hand is a pillar with an on/off lever This is the coasting
brake which is an MOT requirement for gradients of a certain steepness with
junctions at the bottom. Locally this was used at the bottom of Harold Rd. and
between the Langham and the Park Gates. To your left
side is the forward, neutral, and reverse lever, and further to your left is a
big metal case a bit like a fish-fryer. This houses the relays but we don't
have to worry about that. Finally, just a couple of inches from your left ear,
is the main contact-breaker. When that trips out you will think it is the end
of theworld!
Those are
the controls, but there is just one more thing. You will want to know if your
trolley poles have come off. If you are in an AEC there is a neon lamp which
goes out, and if you are in a Sunbeam you will hear a buzzer. You will then have to fill in a dewirement form and go to see the boss Mr. Pettican who will shout at you and tell you that you were
going too fast!
Right, I
think we are ready to move off. Hold on the hand-brake and give the controller
one notch. When you feel the motor respond, slowly release the hand-brake and
creep away. Build up your speed on the
controller and we are off. We now come
to a road junction. If we want to go right, we take our foot off the controller
and coast over the points, but if we want to turn left, we give the controller
a couple of notches and hold the bus back with the hand-brake. This causes us
to take a lot of current through a solenoid which is on the overhead switch and
it snaps over.
Remember
that when you are going along a road with bends, always drive under or outside
the wiring. If you drive inside it gives the same effect as whirling a weight
round your head on a piece of string, and the trolleys may come off. One more
thing, always drive smoothly. You have a colleague behind you with a ticket
machine and a bag of money. He will not take kindly to being thrown to the
floor!
There was
only one major difference between the AEC and the Sunbeam. On the Sunbeam, when
you eased back on the controller, you free-wheeled, but the AECs
were fitted with regeneration and when you eased back, the motor became a
generator and current was fed back into the system. This did, however, make the ride less
smooth.
I was told
by some of the old hands that in the days of the single and double-deck Guys,
if you wanted to learn to drive, you had to find a driver who was willing to
let you have a go. Your tuition then took place in your own time with
passengers on board! When I learned to
drive in the 1950s I did have proper lessons in an empty bus, but I didn't get
paid for it.
Incidentally,
a trolley-bus was not classed as a Public Service Vehicle and we drove on an
ordinary driving licence. In about 1953, Sunbeam had an order from a third
world country where the drivers were a little on the heavy-footed side, so they
designed a controller where you put your foot right down to the floor when
moving off and a black box operated the notches automatically. One of these
boxes was fitted to bus 40 for test purposes and, so far as I know it was never
removed.
In the
concluding article, anecdotes, personalities, and Albert's reign of
terror.
The late Stan
Simpson G4ITM