Time-delay outdoor lighting control systems

  • US 4,991,054 A
  • Filed: 05/13/1988
  • Issued: 02/05/1991
  • Est. Priority Date: 05/13/1988
  • Status: Expired due to Fees
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First Claim
Patent Images

1. A control, comprising:

  • a switch for use in an electric line;

    operating means for operating said switch and responsive to ambient light in a first light range at a slower rate than to ambient light in a second light range dimmer then the first light range and ambient light in a third light range brighter than the first light range.

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