信号扱所
A separate button/switch is provided for each signal and for each set of points. This type of panel is operated in a similar manner to a lever frame. The signalman must move each set of points to the desired position before operating the switch or button of the signal reading over them.
This type of panel needs the least complex circuitry but is not suited to controlling large or busy areas.
This type of panel has one switch/button provided for every signalled route (except that some panels have separate 'entrance' and 'exit' devices). To set a route, the signalman operates the device for the 'entrance' signal, followed by the device for the 'exit' (destination) signal. All points within the route are automatically set to the required position.
Individual points switches are provided, but they are normally left in the central position, which allows the points to be automatically set by the action of setting a route.
上記と同様の原理による装置が世界中で使われている。