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Added pictures to Token Instruments section
== The Token Instruments ==
[[File:HYTokenInstrClose.jpg|thumb|200px|right|Close-up of a token instrument, with telegraph needle at the top, and indicator, commutator and bell plunger below.]]
[[File:TokenCarrier.jpg|thumb|200px|right|A token in a carrier.]]
The largest part of each token instrument is a 'magazine' consisting of four vertical channels, which stores each machine's stock of tokens. Because each token has a large head, wider than each channel, they can be moved around inside the magazine but not removed. Above the magazine is a lock mechanism called a 'commutator'. This is the only route by which tokens may be taken from or placed into the instrument, by turning the token like a key in a lock.