Mechanical Memories Magazine

Issue: 2010-January - Issue 41

Inside Electro-mech.
By Robert Rowland
Welcome to my new article, a mini series called inside electro-mech. We will be looking
at and studying how some of these machines worked, and if there was any chance of
working out a reliable system on them.
We kick off with Twinkle Toes. The game is played by inserting a coin in one of
five slots, each corresponding to a different colour, looking from left to right: yellow,
blue, orange, red and green. When the start button is pressed, the coloured lights will
start to flash in apparently random order, and the payouts (12d, 6d, 4d and 2d) will also
flash. When the machine stops, one colour and one payout amount will remain lit. If the
colour is the one you bet on, you win the amount indicated.
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Any number of colours can be bet on each game, right up to the full five. The machine
has no lost; we have a genuine winner every go. No switches or relays to prevent the 12d
win from coming up, and a reliable system could be worked out on this machine. It's
easy to work out now, but back in the 1960s you would really have needed to see inside
the machine to see what was actually happening, and as twelve year old kids, that was
never going to happen!
Flasher Unit
This is a GPO 25-way uniselector, which simply does one full turn each time the
machine is played, and flashes the coloured stars and payout amounts. It's the same
flashing sequence every time, and this unit has no bearing on the final winning colour or
payout. When the uniselector completes its cycle and the machine stops, the final
winning colour has already been selected.
Above, the selector unit- a GPO 25-way uniselector.
Opposite page, Robert's Twinkle Toes. These machines were supplied by Ru.ff/er &
Walker and are in exactly the same cases as the R&W al/wins (Many Happy Returns,
Fill-em-Up etc). The R&W al/wins were manufactured by Corteen Ltd, of Erith, Kent.
I wonder whether they also produced Twinkle Toes?
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Future scanning projects are planned by the International Arcade Museum Library (IAML).

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