초록 ▼

A housing for a fire detector has a circumferential area including a series of vanes or slats, each positioned at an angle with respect to the tangent at the periphery of the housing. The angle is about 45°, which not only allows ready entrance of gases through the major portion of the “window”defin

A housing for a fire detector has a circumferential area including a series of vanes or slats, each positioned at an angle with respect to the tangent at the periphery of the housing. The angle is about 45°, which not only allows ready entrance of gases through the major portion of the “window”defined by the vanes, but also prevents particles from passing straight through the housing and out the other side. This effects good mixing of the gases, better detection of combustion particles, and also decreases the likelihood of spurious or incorrect signals due to extraneous air currents.

대표청구항 ▼

A fire detector housing having a peripheral area including a plurality of vanes spaced around the peripheral area to admit gases and smoke particles into the housing, each vane being aligned at an acute angle relative to a tangent at the peripheral area, such that the vanes both provide an effective

A fire detector housing having a peripheral area including a plurality of vanes spaced around the peripheral area to admit gases and smoke particles into the housing, each vane being aligned at an acute angle relative to a tangent at the peripheral area, such that the vanes both provide an effective entrance area for the gases and smoke particles and prevent passage of such combustion products directly through the housng in a straight line, in which the vanes are disposed in a circular pattern, and the vanes collectively define a window area, the acute angle of the vanes ensuring that gases are readily admitted over substantially more than half the window area.