| 摘要 |
An electric motor driven timing relay has a speed-reducing gear train having input and output gears and with all of its gears journaled on shafts fixed to a base plate, the electric motor driving the input gear when energized and the output gear having an element fixed on it which rotates with it through a circular path, an electric switch being provided with an actuator positioned in this rotative path and a setting wheel being provided which releasably connects with the output gear for moving the latter to any of a range of rotative positions from which to start its rotation when the motor is energized. To facilitate assembly of these various parts of the relay, the gear journaling shafts are fixed to the base plate to project from only one side of the base plate and the motor and its connecting means, the switch and its actuator, and the setting wheel are also all positioned on this same side. This permits all of the relay parts to be assembled without reversing the base plate or working on its opposite sides, thus facilitating manual and particularly automated assembling operations.
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