Patent ID: 8141422
Filing Date: 2012-03-27
Classification: E05B,E05C,Y10T

Abstract:
1. A duct detector housing comprising: a housing cover; a housing body having a gas inlet and a gas outlet, said gas inlet in fluid communication with a gas conveying duct, said housing body adapted to have a detector therein and being complementary to said cover to form an interface therebetween; a gasket disposed at said interface; a binary mode securement mechanism for securing said cover to said housing body, with the gasket therebetween, in either only an open or closed position; a signal device controlled by said securement mechanism, normally activated when the securement device is in the open position to generate a cover removal alarm; and a manually activatable maintenance mode button extending from the cover and engaging a maintenance mode switch located within the housing body, the engagement of the mode switch allowing for positioning the securement device in the open position, and subsequent removal of the cover for a pre-allotted amount of time without triggering a cover removal alarm.