Duct smoke detector
First Claim
Patent Images
1. Apparatus for detecting gas and smoke flow in a duct comprising:
- a smoke detector;
a housing around the detector including inlet and outlet ports for communication with the duct and means directing gas flow on a path between the ports to and from the detector;
a vaned rotor on the path rotated by flow of gas to give a visual indication of the gas flow; and
a window into the housing for viewing the rotor.
9 Assignments
0 Petitions
Accused Products
Abstract
Apparatus for sensing smoke in a duct includes a housing with inlet and outlet ports and a flow chamber which directs gas flow on a path between the ports and to and from a smoke detector. A vaned rotor on the path is visible through a window in the housing gives a visual indication of the existence or nonexistence and direction of gas flow and thus whether or not normally flowing duct gas is being sensed.
-
Citations
6 Claims
-
1. Apparatus for detecting gas and smoke flow in a duct comprising:
-
a smoke detector; a housing around the detector including inlet and outlet ports for communication with the duct and means directing gas flow on a path between the ports to and from the detector; a vaned rotor on the path rotated by flow of gas to give a visual indication of the gas flow; and a window into the housing for viewing the rotor. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification