Patent ID: 8289176

Claim:
A recess-mounted detector assembly comprising: a housing configured to be recess mounted in an opening formed in a surface of a structure located in a preselected zone, the housing having a base portion bounded by a sidewall portion to define an interior space having an open end and configured to receive at least one detecting device for detecting a prescribed condition in an airstream in the preselected zone; a cover removably covering the opening of the structure, the cover having at least one aperture therein for allowing an airflow of air from the airstream in the preselected zone into the interior space of the housing; and a base plate connected to an inner surface of the sidewall portion of the housing for undergoing pivotal movement between a first position, in which the base plate separates the interior space of the housing into a first compartment configured to receive the detecting device and a second compartment disposed between the open end of the housing and the base plate, and a second position in which the base plate is pivoted toward the open end of the housing to enable access to the first compartment from the open end of the housing, the base plate having a first main surface, a second main surface opposite the first main surface and configured to removably support within the second compartment an air inducing device operable to induce the air flow in through the aperture of the cover from the preselected zone and into the second compartment, and at least one air opening extending from the first main surface to the second main surface and positioned so that in the first position of the base plate, the induced air flow in the second compartment passes through the air opening and into the first compartment to allow the airflow to reach the detecting device to detect the condition in the airstream; wherein the sidewall portion of the housing has a through-hole communicating the interior space to an exterior of the housing and through which electrical wiring is configured to extend for electrically connecting the air inducing device to an external source of electrical power so that the base plate is allowed to pivot from the first position to the second position without requiring disconnection of the electrical wiring from either the air inducing device or the external source of electrical power.