Visual buffering element for hazard detector internal components

• US 9,689,853 B2
• Filed: 05/15/2015
• Issued: 06/27/2017
• Est. Priority Date: 05/15/2015
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Mittleman, Adam, Schmidt, Mathias, Dong, William, Shih, Poll, Webb, Nicholas
• Primary Examiner(s): Caputo, Lisa
• Assistant Examiner(s): WILLIAMS, JAMEL E
• Application Number:
  US14/714,065
• Publication Number:
  US 20160334379A1
• Time in Patent Office: 774 Days
• Field of Search: 73431
• CPC Class Codes: G01N 33/0036 Specially adapted to detect a particular component all the other sub-groups of G01N33/0004 take precedence

Abstract

A hazard detector includes a chassis configured to house components of the hazard detector. The chassis includes a front defining a central aperture. The front has a domed contour such that an outer edge of an inner portion extends beyond an outer periphery of the front. The inner surface tapers from the outer edge toward the inner portion. The detector includes a mesh formed to the contour of the front so the mesh is flat against the front. The mesh defines an aperture corresponding to the central aperture. The detector includes a grille secured to the chassis that defines an aperture corresponding to the central aperture and defines openings positioned along the grille. An inner surface of the grille includes a contour corresponding to the contour of the front so the mesh is flat against the inner surface. The mesh is positioned between the grille and the chassis.

Claims

1. A hazard detector comprising:

a chassis;

one or more hazard sensors housed within the chassis;

a grille that defines a plurality of holes, wherein an inner surface of the grille has a three-dimensional contour and the grille is secured to the chassis; and

a porous mesh that is formed to match the three-dimensional contour of the inner surface of the grille, the porous mesh being positioned against the inner surface of the grille, wherein the porous mesh obscures viewing, through the plurality of holes, of internal componentry of the hazard detector.

2. The hazard detector of claim 1, wherein the chassis comprises a three-dimensionally contoured front surface and the porous mesh is positioned between a front surface of the chassis and the inner surface of the grille.

3. The hazard detector of claim 1, wherein the porous mesh is molded in a three-dimensional shape.

4. The hazard detector of claim 1, wherein:

the chassis further defines an aperture, larger than a hole of the plurality of holes; and

the aperture is at least partially encompassed by a conically-shaped surface of the chassis.

5. The hazard detector of claim 4, wherein the porous mesh defines a mesh central aperture corresponding to the aperture of the chassis and the porous mesh comprises a plurality of flexible tabs formed radially at least partially around the mesh central aperture.

6. The hazard detector of claim 5, wherein at least some of the plurality of flexible tabs are secured to the conically-shaped surface of the chassis.

7. The hazard detector of claim 1, wherein the porous mesh comprises woven fibers having diameters between about 50 and 75 microns.

8. The hazard detector of claim 7, wherein the woven fibers are spaced apart by between about 100 and 200 microns.

9. The hazard detector of claim 1, wherein the grille has a domed contour.

10. The hazard detector of claim 1, wherein the porous mesh has an air permeability of at least 5000 L/m²s such that an audible signal of approximately 85 decibels may be emitted from the hazard detector that is audible at least 3 meters from the hazard detector and such that the porous mesh is penetrable by a particulate matter detectable by a hazard sensor of the one or more hazard sensors of the hazard detector.

11. A method of securing a porous mesh of a hazard detector, the method comprising:

aligning the porous mesh with a front surface of a chassis;

flexing a plurality of tabs of the porous mesh to conform to a portion of the chassis;

adhering the plurality of tabs to the portion of the chassis such that the porous mesh is secured to the chassis;

applying heat and pressure to the porous mesh to mold the porous mesh to conform to a three dimensional shape of the front surface of the chassis; and

coupling a grille to the chassis, such that the mesh is disposed between the grille and the chassis and the porous mesh obscures view through a plurality of holes of the grille of internal componentry of the hazard detector.

12. The method of securing the porous mesh to the chassis of the hazard detector of claim 11, wherein applying heat and pressure to the porous mesh comprises:

pressing a heated mold against the porous mesh, a surface of the heated mold having a contour conforming to the three-dimensional shape of the front surface of the chassis such that the porous mesh is molded to conform to the three-dimensional shape.

13. The method of securing the porous mesh to the chassis of the hazard detector of claim 12, wherein:

the heated mold is heated to between about 70 and 90°

C. and is pressed against the porous mesh and the chassis at a pressure of between about 2 and 5 kgf/cm².

14. The method of securing the porous mesh to the chassis of the hazard detector of claim 11, wherein the porous mesh has an air permeability of between about 5000 and 6500 L/m²s.

15. The method of securing the porous mesh to the chassis of the hazard detector of claim 11, wherein:

the porous mesh comprises woven fibers have diameters between about 50 and 75 microns; and

the woven fibers are spaced apart by between about 100 and 200 microns.

16. The method of securing the porous mesh to the chassis of the hazard detector of claim 11, wherein:

the porous mesh has a thickness between about 75 and 200 microns.

17. A hazard detector comprising:

a chassis configured to house components of the hazard detector;

a grille secured to the chassis, the grille defining a plurality of openings, wherein an inner surface of the grille comprises a three-dimensional contour;

a three-dimensionally molded porous mesh secured against the inner surface of the grille, wherein;

the three-dimensionally molded porous mesh conforms to the three-dimensional contour of the inner surface of the grille such that the three-dimensionally molded porous mesh lies flat against the inner surface of the grille; and

the three-dimensionally molded porous mesh comprises woven fibers having diameters between about 50 and 75 microns, the woven fibers spaced apart from one another by between about 100 and 200 microns.

18. The hazard detector of claim 17 wherein the three-dimensionally molded porous mesh has an air permeability of at least 5000 L/m²s.

19. The hazard detector of claim 18 wherein an audible signal of approximately 85 decibels is emitted from the hazard detector that is audible at least 3 meters from the hazard detector.

20. The hazard detector of claim 19 wherein the three-dimensionally molded porous mesh is penetrable by particulate matter detectable by a hazard sensor of the hazard detector.