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US 4,012,019 AGranted
Car signaling system
AssigneeHitachi, Ltd.
InventorsHisakatsu Kiwaki, Hiroshi Okubo
Life of this patent
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Abstract
A signaling system for cars having wheels adapted for running along a track, in which a signal wire is disposed to extend along the track, a pantograph is provided on each car to make sliding engagement with the signal wire, and a detector apparatus responsive to the sliding movement of the pantograph along the signal wire is provided to detect the relative interval between the cars.
Claims18
A signaling system for cars having wheels adapted for running along a track, said signaling system comprising:
- at least two signal wires disposed to extend along said track;
- main pantograph means mounted on each of said cars for making sliding engagement with one of said signal wires;
- subsidiary pantograph means mounted on each of said cars for making sliding engagement with the remainder of said signal wires, said main and subsidiary pantograph means being connected electrically;
- and
- first means for detecting the relative interval between said cars in response to the sliding movement of said main and subsidiary pantograph means along said signal wires.
2 more elements
Dependencies are inferred from the claim text.