Ionization type smoke sensing chamber
AssigneeHoneywell International Inc.
InventorsWilliam MacPherson, Gregory A. Wischstadt
Life of this patent
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Abstract
A modular smoke detector has a sensing electrode carried by an insulator module. The insulator module also carries an ionization source and a field effect transistor. The insulator module lockingly engages a printed circuit board. A conical smoke deflector and exterior electrode are assembled to the insulator module. The deflector and exterior electrode are spaced apart providing a space for inflow and outflow of airborne particles of combustion.
Claims56
A smoke detector comprising:
- a sensing chamber for ambient smoke, the sensing chamber incorporating a tapered, insulative structure with a region adjacent to a selected electrode whereby the tapered structure directs smoke toward the selected electrode.
A detector for monitoring a region for airborne particles of combustion comprising:
- an ionization source;
- a sensing electrode;
- a sensing chamber wherein the sensing chamber is bounded at least in part by a cylindrical member and an end conductive member wherein the cylindrical member has a generally conically shaped end section and wherein the end conductive member is displaced from the end section by a separation such that airborne particles of combustion enter the sensing chamber through the separation and can be sensed by the sensing electrode.
An ionization-type smoke detector comprising:
- a modular ionization source having an adjacent metallic member which carries at least a first biased connector member which extends therefrom;
- an insulating member which carries the source;
- and
- a sensing electrode spaced from the source by an insulating member.
A detector comprising:
- a housing which includes first and second spaced apart electrodes and an ionization source located adjacent to one of the electrodes wherein the other electrode defines an internal opening therethrough with a predefined periphery, the periphery is distorted by at least one surface that is adjacent to the opening.
A detector comprising:
- a two part sensing chamber wherein one part includes an insulating support which carries first and second spaced apart conducting electrodes and a solid state buffer, wherein one of the electrodes is coupled to a spring biased contact and the other is coupled to the buffer and wherein the other part comprises a hollow housing which receives the one part.
A detector comprising:
- a sensing chamber which includes an insulating support which carries first and second spaced apart conducting electrodes and a solid state buffer, wherein one of the electrodes is coupled to a spring biased contact and the other is coupled to the buffer and a hollow housing which receives the support.
Dependencies are inferred from the claim text.