Tilt detector for roll-up door
First Claim
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1. Tilt-detecting device, for use upon a hinged-slat type, raisable/lowerable door, the door having a front, back, top, bottom, and left and right sides, wherein:
- the device includes a housing, and includes a means for attaching the housing to the door, at or adjacent to the bottom of the door;
the device includes means for detecting when a slat of the door undergoes a tilt of more than a predetermined angle Q, in the left/right sense of the door, the angle Q lying in the plane of the door;
the device includes a means for arresting motion of the door upon detecting, and in response to, the said tilt.
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Abstract
The device is based on a tilt-sensing switch of the mercury-bridges-gap type. The device measures the tilt angle of the bottom slat of a roll-down door. If the slat becomes tilted, due for example to one end of the slat becoming snagged in the guideway at the side of the door, the sensor detects the tilt, and arrests the downwards movement of the door, before the slats can spill out and escape from the guideway.
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Citations
12 Claims
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1. Tilt-detecting device, for use upon a hinged-slat type, raisable/lowerable door, the door having a front, back, top, bottom, and left and right sides, wherein:
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the device includes a housing, and includes a means for attaching the housing to the door, at or adjacent to the bottom of the door; the device includes means for detecting when a slat of the door undergoes a tilt of more than a predetermined angle Q, in the left/right sense of the door, the angle Q lying in the plane of the door; the device includes a means for arresting motion of the door upon detecting, and in response to, the said tilt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification