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US 2012/0000898 A1Published application
Temperature controlled displays
AssigneeHolmes Catering Group Limited
InventorMartin Brown
Life of this patent
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Abstract
A heated counter for service of hot food has one or more hotplates, a light source illuminating each hotplate and a number of light sensors below each hotplate. When a sensor is obscured by a dish of food, power is supplied to that hotplate, and when no sensor is obscured, that hotplate is kept in stand-by mode.
Claims14
A temperature-controlled display counter comprises at least one temperature-controllable area;
- a power supply means for each temperature-controllable area to supply heating or cooling;
- above each temperature-controllable area a radiation source incident over substantially the whole of said area;
- and below each temperature-controllable area at least one radiation sensor;
- arranged so that when no radiation sensor below a temperature-controllable area is obscured, the power supply to that area is maintained at stand-by level, and when at least one radiation sensor is obscured, the power supply to that area is increased.
1 more element
(canceled)
Dependencies are inferred from the claim text.