Patent EP0464499A2 successfully refreshed from Google Patents.
US3908309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate products of combustion detector for closure frame
Assignee: Rixson Firemark Inc
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Filing: 1973-10-09
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Granted: 1975-09-30
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Expires: 1993-10-09
Abstract
Abstract A door frame having a head member defining the top of a door opening with the head member optionally supporting an electrically actuated door holder-closer. A module having a frame shell section and a detector for the particulate products of combustion supported on the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector. A socket formed in the head member receives the module so that any particulate products of combustion flowing through the door opening pass through the module access openings to actuate the detector. The detector is electrically connected to the door holder-closer to effect closing of an otherwise open door in response to the detection of the products of combustion. The detector may be either an ionization or photocell type detector.
Inventors
- 👤 Gordon L Coulter
- 👤 Duane D Pearsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:34
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; E; E05; E05F; E05F3/00; E05F3/22; E05F3/221; E05F3/222; E05F1/00; E05F1/002; E05F1/006; E05F15/00; E05F15/70; E05F15/72; E05F2003/228; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/46; E05Y2201/462; E05Y2201/47; E05Y2201/474; E05Y2201/482; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
In a closure frame having a head member defining the top of a closure opening with the head member supporting an electrically actuated closure holder-closer, the improvement comprising a module including a frame shell section providing a module base and a detector for the particulate products of combustion supported on the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, a socket formed in the head member to receive the module whereby particulate products of combustion passing through the closure opening pass through the module access openings to actuate thereby the detector, and means electrically connecting the detector to the closure holder-closer to effect closing of an otherwise open closure in response to the actuation of the detector upon the detection of the products of combustion.
Claim 2
Dependent Claim
146 words
In a closure frame having a head member defining the top of a closure opening with the head member supporting an electrically actuated closure holder-closer, the improvement comprising a module including a frame shell section providing a module base and a detector for the particulate products of combustion supported on the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, a socket formed in the head member to receive the module whereby particulate products of combustion passing through the closure opening pass through the module access openings to actuate thereby the detector, and means electrically connecting the detector to the closure holder-closer to effect closing of an otherwise open closure in response to the actuation of the detector upon the detection of the products of combustion.
Claim 3
Dependent Claim
146 words
In a door frame having a head member defining the top of a door opening with the head member supporting an electrically actuated door holder, the improvement comprising a module including a frame shell section providing a module base and a detector for the particulate products of combustion supported on the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, a socket formed in the head member to receive the module whereby particulate products of combustion passing through the door opening pass through the module access openings to actuate thereby the detector, and means electrically connecting the detector to the door holder to permit release of an otherwise open door in response to the actuation of the detector upon the detection of the products of combustion.
Claim 4
Dependent Claim
146 words
In a door frame having a head member defining the top of a door opening with the head member supporting an electrically actuated door holder, the improvement comprising a module including a frame shell section providing a module base and a detector for the particulate products of combustion supported on the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, a socket formed in the head member to receive the module whereby particulate products of combustion passing through the door opening pass through the module access openings to actuate thereby the detector, and means electrically connecting the detector to the door holder to permit release of an otherwise open door in response to the actuation of the detector upon the detection of the products of combustion.
Claim 5
Dependent Claim
36 words
The combination of claim 2 in which the frame shell section has a contour substantially identical to that portion of the head member adjacent to socket whereby the head member has a substantially continuous surface contour.
Claim 6
Dependent Claim
25 words
The combination of claim 3 in which the head member includes a horizontal jamb section, a casing or face section and a closure stop section.
Claim 7
Dependent Claim
25 words
The combination of claim 4 in which the access openings are formed in the frame shell section corresponding to the stop of the head member.
Claim 8
Dependent Claim
23 words
The combination of claim 4 in which the access openings are formed in the frame shell section corresponding to the horizontal jamb section.
Claim 9
Dependent Claim
24 words
The combination of claim 4 in which the access openings are formed in the frame shell section corresponding to the casing or face element.
Claim 10
Dependent Claim
21 words
The combination of claim 4 in which the access openings are formed in at least two of the frame member sections.
Claim 11
Dependent Claim
13 words
The combination of claim 4 in which the detector is an ionization detector.
Claim 12
Dependent Claim
124 words
In a closure frame having a head member defining the top of a closure opening, the improvement comprising a module including a frame shell section providing a module base and a particulate products of combustion detector in which detector an electrical current characteristic is altered in response to the detection of such particulate products of combustion, the detector being supported within the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, and a socket formed in the head member to receive the module whereby particulate products of combustion passing through the closure opening pass through the module access openings to actuate thereby the detector.
Claim 13
Dependent Claim
124 words
In a closure frame having a head member defining the top of a closure opening, the improvement comprising a module including a frame shell section providing a module base and a particulate products of combustion detector in which detector an electrical current characteristic is altered in response to the detection of such particulate products of combustion, the detector being supported within the interior of the frame shell section with access openings being formed in the shell section to enable particulate products of combustion to pass through the shell to the detector, and a socket formed in the head member to receive the module whereby particulate products of combustion passing through the closure opening pass through the module access openings to actuate thereby the detector.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |