| 摘要 |
<p>A random timer for home protection lighting including a reversible electric drive motor (22) an output means (28) and a power circuit (10) connecting a power supply (12) to the drive motor and output means and where two dissimilar cam-type timing elements (94, 96) are controlled by the drive motor to provide irregular non-continuous operative phases of output energy, and the power circuit of the motor includes a switch (44, 48, 50) which is opened temporarily by each power phase actuation of the timing elements to provide an opportunity for the drive motor to reverse and change the timer cycle. </p> |
