| 摘要 |
A coin operated electric lamp, including an electric circuit, having a plug for connection to a household electric power supply; the circuit including a switch activated by a deposited coin, so to close the circuit to an incandescent lamp bulb and to a motor in parallel to the lamp, the motor driving a spiral cam which, upon completing a rotation, pushes the switch into an open position so to stop the motor and turn out the light bulb.
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