Patents Assigned to ARMCO KEY SECURITY LIMITED
  • Window alarm
    Patent number: 9947209
    Abstract: The invention relates to an alarm for detecting damage to a multiple glazed unit comprising: a humidity sensor; and a movement sensor in which, when the movement sensor detects movement of the glazed unit, the humidity sensor compares the current detected humidity in the glazed unit with a previously stored detected humidity, and if the humidity has changed by a predetermined threshold, a damage alarm is triggered.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: April 17, 2018
    Assignee: ARMCO KEY SECURITY LIMITED
    Inventors: Yang Mu, ZhenYan Chen, David Foster, George Schaar