US4040143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Releasable door hold-open device
Assignee: Schlage Lock Co LLC
•
Filing: 1976-08-06
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Granted: 1977-08-09
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Expires: 1996-08-06
Abstract
Abstract A releasable door hold-open device or assembly is mounted on the header over a door panel. The assembly has a track channel with a top web and depending flanges. A door panel connector arm has a traveller movable in the track channel. A solenoid operates a detent in the track channel near the hinge end of the traveller path. A conductor channel is fastened to the top web and communicates with the track channel through an opening. A connector block releasably adjoins the track channel and the conductor channel at the hinge end thereof. A smoke detector underlies the connector channel at the other end of the track channel. Conductors from outside extend through the connector block, through connecting plugs in the block and track channel and to the solenoid and through the conductor channel to the smoke detector.
Inventors
- 👤 Thomas R. Lasier
- 👤 William G. Rodseth
- 👤 Raymond H. Schnarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:01
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/22; E05F3/221; E05F3/222; E05F2003/228; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/46; E05Y2201/462; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/2935; Y10T292/294
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A releasable door hold-open device comprising an elongated channel defining an internal guide, a door connector, a traveller on said door connector adapted to travel in a predetermined path in said guide, holding means on said channel movable between a first position in engagement with said traveller and a second position out of engagement with said traveller, a solenoid adapted when energized to hold said holding means in said first position, means for mounting said solenoid at one end of said elongated channel, an electric smoke detector, means for mounting said detector at the other end of said elongated channel, at least one electrical conductor connected to said detector and to said solenoid, and means for disposing said conductor along said channel at one side of but out of said path.
Claim 2
Dependent Claim
131 words
A releasable door hold-open device comprising an elongated channel defining an internal guide, a door connector, a traveller on said door connector adapted to travel in a predetermined path in said guide, holding means on said channel movable between a first position in engagement with said traveller and a second position out of engagement with said traveller, a solenoid adapted when energized to hold said holding means in said first position, means for mounting said solenoid at one end of said elongated channel, an electric smoke detector, means for mounting said detector at the other end of said elongated channel, at least one electrical conductor connected to said detector and to said solenoid, and means for disposing said conductor along said channel at one side of but out of said path.
Claim 3
Dependent Claim
21 words
A device as in claim 1 in which said disposing means is a conductor channel removably secured to said elongated channel.
Claim 4
Dependent Claim
34 words
A device as in claim 2 in which said conductor channel has an overhang at said other end of said elongated channel, and said detector mounting means engages said overhang of said conductor channel.
Claim 5
Dependent Claim
38 words
A device as in claim 3 including a protecting screen disposed partially around said detector, said screen substantially continuing said elongated channel at said other end thereof and terminating substantially at said other end of said conductor channel.
Claim 6
Dependent Claim
31 words
A device as in claim 4 including a circuit board for said detector, and in which said detector mounting means suspends said circuit board and said screen from said conductor channel.
Claim 7
Dependent Claim
36 words
A device as in claim 2 in which said conductor channel stops short of said one end of said elongated channel, and a connector block at said end of said elongated channel engages said conductor channel.
Claim 8
Dependent Claim
36 words
A device as in claim 6 in which said conductor channel has walls defining a pair of grooves open at said end, and said connector block has a pair of prongs engageable with said groove walls.
References Cited (Backward Citations)
US2887194A
Cited
US3164404A
Cited
US3415562A
Cited
US3648326A
Cited
DE2128925A1
Cited
US3729770A
Cited
US3777423A
Cited
US3905063A
Cited
US3908309A
Cited
US3771823A
Cited
US3729771A
Cited
US3964125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |