Coin Slot

Coin Slot Magazine - #083 - 1982 - January [International Arcade Museum]
RESTORATION & REPAIR
carousel, which advances counterclockwise one space
with each play. When a payout situation occurs, the
Groetchen
carousel backs up in a clockwise direction the appro
priate number of spaces to deliver coins to the payout
cup. Coins which are not payed out are eventually
Columbia
rotated to the far end of the carousel, where they are
released one-at-a-time into the take. This clever design
provides a positive method of coin movement and
discourages slugging by paying out the most recently
played coins.
When a payout is needed, the carousel is rotated
clockwise by a concentrically mounted arm and pinion
assembly. Rotation of this assembly is controlled by a
payout finger attached to a rack, which is engaged with
the payout arm pinion. The distance moved by the
payout finger and rack is determined by which disc
holes the finger enters and then regulated by an
adjustable stepped stop-plate which limits the exact
distance traversed. This lateral movement is converted
to rotational movement by the rack and pinion, whose
arm is allowed to engage the toothed undersurface of
the carousel and rotate it the number of spaces
required.
Before the payout and carousel adjustments can be
made, the reel assembly must first be correctly posi
tioned. The reel axle is supported at either end by two
bushings, one on the left which is fully adjustable and
one on the right whose position is fixed but which has
an adjusting screw and locknut in its center. Release
the locknuts on the left bushing and the right adjusting
crew, and push the reel assembly to the left firmly
against the bushing. Insert the mechanism in the
Regarded by many as a poorly working and undesir
able example of a slot machine, the Columbia is indeed
a radical departure from conventional bell machine
construction. Despite its limited success, it represents
a most ingenious design approach which incorporates
many interesting features, and when properly adjusted
in accordance with the following instructions, it can
give long and trouble-free service.
An inspection of the Columbia mechanism will reveal
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its distinctive central feature, a large 80 position coin
carousel, which serves as the heart of the mechanical
operation. When a coin is inserted into the machine, it
is first carried around in a small octagonal turret, which
serves the same function as an escalator. After advanc
ing to the eighth position of the turret, the coin is
dropped into an unfilled slot at the beginning of the
54 International
—THE COIN
SLOT
© The
Arcade
Museum
cabinet and observe how the reels register in the
windows. The reels can be moved further left by
backing out the left bushing or moved right by backing
out the right adjusting screw and turning the left
bushing inwards. When the reels are hard against the
left bushing and centered in the windows, tighten the
left locknut first then turn the right adjusting screw in
until there is no endplay in the reel axle, then back the
screw out Vi turn to provide working clearance and
tighten the locknut.
The second adjustment to be made is to position the
semi-circular payout arm guide plate. One end of the
payout arm rests on this plate as it travels through its
arc until it reaches the end of the plate, where it drops
off the edge, forcing the opposite end upwards to
engage the carousel and rotate it. The mounting holes
of this plate are slotted, allowing its movement through
a small arc for adjusting purposea When the reels are
January 1982
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