Railway switches and signals – Train-position indication – Miniature model
Reexamination Certificate
2008-04-01
2008-04-01
Le, Mark Tuan (Department: 3617)
Railway switches and signals
Train-position indication
Miniature model
Reexamination Certificate
active
07350754
ABSTRACT:
An intelligent block controller for a model train is connected to receive detect signals from adjacent blocks of model railway track assemblies indicating that a model train is present on a respective block track assemblies. The controller provides one or more control outputs to automatically and independently control power to selected blocks of track, to operate one or more switches, or to operate other accessories. The detect signal may be provided by grounding an isolated portion of a rail to a ground rail or other voltage reference. The controller may also be configured to accept user input to select a preferred operating mode, or to deactivate automatic control.
REFERENCES:
patent: 5555815 (1996-09-01), Young et al.
patent: 5638522 (1997-06-01), Dunsmuir et al.
Le Mark Tuan
Lionel L.L.C.
O'Melveny & Myers LLP
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