US6734801B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch frame electronic air filter alarming device
Assignee: Nokia of America Corp
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Filing: 2002-06-26
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Granted: 2004-05-11
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Expires: 2022-06-26
Abstract
Abstract An alarming apparatus and methods for use with an air filter are disclosed herein. A filament can be stretched across a portion or section of an air filter frame, wherein the portion or section comprises a first locus and a second locus located diagonally opposite the first locus. The filament can be attached at a first end of the filament to the air filter frame at the first locus. A micro-switch can be attached to a second end of the filament at the second locus. Additionally, an alarm can communicate through a communications device (wired and/or wireless) with the micro-switch, such that when the air filter becomes loaded with debris, the air filter deflects thereby causing a force to be exerted on the filament, which in turn triggers the micro-switch to transmit a signal to the alarm indicating that the air filter requires proper attention thereof. The filament can be stretched facing either an upstream or a downstream side of airflow thereof.
Inventors
- 👤 William H. Scofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:39
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0084; B01D46/0086; B01D46/42; B01D46/429; B01D46/44; B01D46/446; F; F24; F24F; F24F11/00; F24F11/30; F24F11/32; F24F11/39; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
156 words
An alarm apparatus for use with an air filter, said apparatus comprising: a filament stretched across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus; a switch attached to a second end of said filament, said switch mounted to said air filter at said second locus of said at least one portion of said air filter frame; and an alarm that communicates with said switch, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.
Claim 2
Dependent Claim
156 words
An alarm apparatus for use with an air filter, said apparatus comprising: a filament stretched across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus; a switch attached to a second end of said filament, said switch mounted to said air filter at said second locus of said at least one portion of said air filter frame; and an alarm that communicates with said switch, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said filament is stretched across said at least one portion of said air filter frame facing an upstream side of airflow thereof.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 wherein said filament is stretched across said at least one portion of said air filter frame facing a downstream side of airflow thereof.
Claim 5
Dependent Claim
37 words
The apparatus of claim 1 wherein said switch is attached to said air filter frame by a wire which joins said switch to said second locus of said at least one portion of said air filter frame.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1 wherein said alarm communicates with said switch through an electrical circuit thereof.
Claim 7
Dependent Claim
16 words
The apparatus of claim 1 further comprising a fan unit alarm card connected to said alarm.
Claim 8
Dependent Claim
21 words
The apparatus of claim 6 wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.
Claim 9
Dependent Claim
11 words
The apparatus of claim 1 wherein said switch comprises a micro-switch.
Claim 10
Dependent Claim
167 words
An alarming apparatus for an air filter, said apparatus comprising: a filament stretched across at least one section of an air filter frame of said air filter, wherein said at least one section comprises a first corner and a second corner located diagonally opposite said first corner, such that said filament is attached at a first end of said filament to said air filter frame at said first corner; a micro-switch attached to a second end of said filament and mounted at said second corner of said at least one section of said air filter frame, wherein said micro-switch is electrically connected to a wire which is connected to a communications device; and an alarm that communicates with said communications device, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said micro-switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.
Claim 11
Dependent Claim
167 words
An alarming apparatus for an air filter, said apparatus comprising: a filament stretched across at least one section of an air filter frame of said air filter, wherein said at least one section comprises a first corner and a second corner located diagonally opposite said first corner, such that said filament is attached at a first end of said filament to said air filter frame at said first corner; a micro-switch attached to a second end of said filament and mounted at said second corner of said at least one section of said air filter frame, wherein said micro-switch is electrically connected to a wire which is connected to a communications device; and an alarm that communicates with said communications device, such that when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament, which in turn triggers said micro-switch to transmit a signal to said alarm indicating that said air filter requires proper attention thereof.
Claim 12
Dependent Claim
45 words
The apparatus of claim 9 further comprising: a fan unit alarm card connected to said alarm, wherein said alarm communicates with said micro-switch through an electrical circuit thereof; and wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.
Claim 13
Dependent Claim
144 words
An alarm method for providing an alarm associated with an air filter, said method comprising the steps of: stretching a filament across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus; attaching a switch to a second end of said filament at said second locus of said at least one portion of said air filter frame; and automatically triggering said switch to transmit a signal to an alarm indicating that said air filter requires proper attention thereof, when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament.
Claim 14
Dependent Claim
144 words
An alarm method for providing an alarm associated with an air filter, said method comprising the steps of: stretching a filament across at least one portion of an air filter frame of said air filter, wherein said at least one portion comprises a first locus and a second locus located opposite said first locus, such that said filament is attached at a first end of said filament to said air filter frame at said first locus; attaching a switch to a second end of said filament at said second locus of said at least one portion of said air filter frame; and automatically triggering said switch to transmit a signal to an alarm indicating that said air filter requires proper attention thereof, when said air filter becomes loaded with debris, said air filter deflects thereby causing a force to be exerted on said filament.
Claim 15
Dependent Claim
31 words
The method of claim 11 further comprising the step of: stretching said filament across said at least one portion of said air filter frame facing an upstream side of airflow thereof.
Claim 16
Dependent Claim
31 words
The method of claim 11 further comprising the step of: stretching said filament across said at least one portion of said air filter frame facing a downstream side of airflow thereof.
Claim 17
Dependent Claim
40 words
The method of claim 11 further comprising the step of: attaching said switch to said air filter frame by a wire that joins said switch to said second locus of said at least one portion of said air filter frame.
Claim 18
Dependent Claim
23 words
The method of claim 11 further comprising the step of: permitting said alarm to communicate with said switch through an electrical circuit thereof.
Claim 19
Dependent Claim
19 words
The method of claim 11 further comprising the step of: connecting a fan unit alarm card to said alarm.
Claim 20
Dependent Claim
21 words
The method of claim 16 wherein said fan unit alarm card communicates with a Heating, Ventilating and Air Conditioning (HVAC) system.
Claim 21
Dependent Claim
17 words
The method of claim 11 further comprising the step of: configuring said switch to comprise a micro-switch.
Claim 22
Dependent Claim
24 words
The method of claim 11 wherein said at least one portion of said air filter frame comprises a section of said air filter frame.
Claim 23
Dependent Claim
37 words
The method of claim 19 wherein said first locus comprises a first corner of said section and said second locus comprises a second corner of said section, wherein said first corner is located opposite said second corner.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-05-11 | 2007-11-10 | 2008-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-11 | 2011-11-10 | 2012-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-11 | 2015-11-10 | 2016-05-11 | $7700.00 | Window Closed / Lapsed |