Abstract: Disclosed is an alarm unit having an alarm controller, the alarm controller being operatively connected to a plurality of implements within the alarm unit having a mechanical actuator and a magnetic sensor and at least one of a visual source and an audible source, wherein the alarm unit: monitors for input to initiate one of a plurality of self-tests including: a first test, initiated by actuation of the mechanical actuator without actuation of the magnetic sensor, and a second test, initiated by actuation of the mechanical actuator with actuation of the magnetic sensor, and wherein the first test differs from the second test.

Abstract: A heat alarm unit includes a housing and a button assembly. The housing has a central axis and defines an opening disposed substantially normal to like housing. The button assembly is exposed through the opening and is constructed and arranged to move with respect to the housing. The button assembly has a support structure and a heat sensor supported by the support structure.

Abstract: Disclosed is an alarm unit having an alarm controller, the alarm controller being operatively connected to a plurality of implements within the alarm unit having a mechanical actuator and a magnetic sensor and at least one of a visual source and an audible source, wherein the alarm unit: monitors for input to initiate one of a plurality of self-tests including: a first test, initiated by actuation of the mechanical actuator without actuation of the magnetic sensor, and a second test, initiated by actuation of the mechanical actuator with actuation of the magnetic sensor, and wherein the first test differs from the second test.

Abstract: A heat alarm unit includes a housing and a button assembly. The housing has a central axis and defines an opening disposed substantially normal to like housing. The button assembly is exposed through the opening and is constructed and arranged to move with respect to the housing. The button assembly has a support structure and a heat sensor supported by the support structure.

Abstract: A dome lens extending upwardly about a center axis A and outwardly in a radial direction R, having: a first portion forming a first annular ring about the center axis A that includes a first inner surface that is convex, and being oriented so that a first tangent to the first inner surface is at a first angle to the center axis A that is less than forty-five degrees; a second portion being continuous with the first portion and forming a second annular ring about the center axis A and including a second inner surface that is convex, and being oriented so a second tangent to the second inner surface is canted toward the center axis A; a third portion being continuous with the second portion to enclose the lens, forming an annular solid disk about the center axis A, and including a third inner surface that is convex.

Abstract: A life safety device including a housing, a detector associated with the housing for detecting one or more conditions, and an actuatable mechanism coupled to the housing. The actuatable mechanism is movable in response to a force to engage a switch. The actuatable mechanism includes a light assembly operable in response to detection of at least one of the one or more conditions by the detector.

Abstract: A life safety device including a housing, a detector associated with the housing for detecting one or more conditions, and an actuatable mechanism coupled to the housing. The actuatable mechanism is movable in response to a force to engage a switch. The actuatable mechanism includes a light assembly operable in response to detection of at least one of the one or more conditions by the detector.