Fire detector with replacement module
First Claim
Patent Images
1. A radiant energy fire detector, comprising:
- a housing base comprising a housing wall defining a cavity;
means for securing the housing base to a fixed object;
a removable housing lid having a window;
a removable electronics module comprising radiant energy detection sensors and electronics enclosed within a self-contained enclosure, said removable electronics module adapted in size and shape to fit within said cavity; and
means for securely fastening said housing lid to said housing base such that the electronics module resides completely within the cavity and such that said radiant energy detection sensors align with said window to provide a viewpath for said radiant energy detection sensors through said window, said window being substantially transparent to radiant energy having wavelength components in a predetermined range.
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Abstract
A process and system for flame detection includes a microprocessor-controlled detector with at least three sensors. A wide band infrared sensor is used as the primary detector, with near band and visible band sensors serving to detect false-alarm energy from nonfire sources. Digital signal processing is used to analyze sensed data and discriminate against false alarms. A multistage alarm system can be provided, which is selectively triggered by the microprocessor. Spectral recording and analysis of prefire data is provided for. The detector can be housed in an enclosed, sealed, removable, plastic housing that may include an integral plastic window lens.
51 Citations
15 Claims
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1. A radiant energy fire detector, comprising:
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a housing base comprising a housing wall defining a cavity;
means for securing the housing base to a fixed object;
a removable housing lid having a window;
a removable electronics module comprising radiant energy detection sensors and electronics enclosed within a self-contained enclosure, said removable electronics module adapted in size and shape to fit within said cavity; and
means for securely fastening said housing lid to said housing base such that the electronics module resides completely within the cavity and such that said radiant energy detection sensors align with said window to provide a viewpath for said radiant energy detection sensors through said window, said window being substantially transparent to radiant energy having wavelength components in a predetermined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radiant energy fire detector, comprising:
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a fire detector housing base, said fire detector housing base comprising a backplate adapted for mounting on a fixed surface;
a removable fire detector housing lid having a window, said fire detector housing lid adapted to securely fasten to said fire detector housing base;
a removable electronics/optics module having a size and shape to fit within an enclosed cavity defined by said fire detector housing base and said fire detector housing lid when fastened to said fire detector housing base, said removable electronics/optics module comprising a self-contained enclosure defining a chamber in which are located at least one radiant energy detection sensor and electronics for processing sensor output signals, said self-contained enclosure preventing manual contact with said electronics during installment or replacement of said electronics/optics module; and
a plug-in connector for connecting a set of wires to the removable electronics/optics module;
wherein said at least one radiant energy detection sensor aligns with said window to provide a viewpath for said at least radiant energy detection sensor through said window when said removable electronics/optics module is positioned within said cavity and when said fire detector housing lid is fastened to said fire detector housing base, said window being substantially transparent to radiant energy having wavelength components in a predetermined range. - View Dependent Claims (12, 13)
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14. A fire detector, comprising:
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a fire detector housing base;
means for securing said fire detector housing base to a solid surface;
a removable fire detector housing lid, said removable fire detector housing lid adapted to securely fasten to said fire detector housing base; and
a removable inner detector module comprising a self-contained enclosure, at least one energy detection sensor, and electronics for processing sensor output signals, said at least one energy detection sensor and said electronics for processing sensor output signals located within said self-contained enclosure;
wherein said self-contained enclosure prevents manual contact with said at least one energy detection sensor and said electronics during installment or replacement of said removable inner detector module; and
wherein said removable inner detector module is securable to the interior of said removable fire detector housing lid, said removable inner detector module being entirely encapsulated by said removable fire detector housing lid and said fire detector housing base when said removable fire detector housing lid is securely fastened to said fire detector housing base. - View Dependent Claims (15)
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Specification