US4211990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch concealing hinge
Assignee: McKinney Manufacturing Co
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Filing: 1978-07-10
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Granted: 1980-07-08
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Expires: 1998-07-10
Abstract
Abstract A hinge is secured to the jamb of a door frame and to a door in the frame. Behind the jamb leaf of the hinge the jamb is provided with a hole that is concealed by the hinge. The back of the jamb leaf is provided with a recess facing the hole. An electric switch and its operating magnet are mounted in a housing that is held in the jamb hole and projects into the jamb leaf recess. The housing is not attached to the hinge. In case the hinge leaves are substantially parallel when the door is closed, a ferrous area of the door leaf will activate the switch. If the hinge leaves are at right angles to each other when the door is closed, a ferrous metal area of the edge of the door itself activates the switch.
Inventors
- 👤 Joseph W. Gwozdz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:20
CPC Classifications
H; H01; H01H; H01H36/00; H01H3/00; H01H3/02; H01H3/16; H01H3/161; H01H3/162
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
In combination with a door frame having a jamb and containing a normally closed door member, a hinge with a jamb leaf and a door leaf member, means securing the jamb leaf to said jamb, means securing the door leaf member to said door member, one of said members having a surface facing said jamb leaf in close proximity thereto when said door member is closed, the jamb having a hole extending into it from behind the jamb leaf of the hinge and concealed by said leaf, the back of said jamb leaf being provided with a recess facing the jamb hole and having a non-ferrous front wall, at least the area of said one member surface opposite said front wall being ferrous metal, and an electric switch housing secured in said jamb hole and projecting into said jamb leaf recess, the housing containing an electric switch and a permanent magnet for activating it when the door member is closed and attracts the magnet, said switch housing being concealed by and unattached to said hinge so that the hinge can be removed from said jamb without disturbing the housing.
Claim 2
Dependent Claim
189 words
In combination with a door frame having a jamb and containing a normally closed door member, a hinge with a jamb leaf and a door leaf member, means securing the jamb leaf to said jamb, means securing the door leaf member to said door member, one of said members having a surface facing said jamb leaf in close proximity thereto when said door member is closed, the jamb having a hole extending into it from behind the jamb leaf of the hinge and concealed by said leaf, the back of said jamb leaf being provided with a recess facing the jamb hole and having a non-ferrous front wall, at least the area of said one member surface opposite said front wall being ferrous metal, and an electric switch housing secured in said jamb hole and projecting into said jamb leaf recess, the housing containing an electric switch and a permanent magnet for activating it when the door member is closed and attracts the magnet, said switch housing being concealed by and unattached to said hinge so that the hinge can be removed from said jamb without disturbing the housing.
Claim 3
Dependent Claim
52 words
In the combination recited in claim 1, said hinge leaves being steel, and said recess being formed by an opening extending through said jamb leaf and by a non-ferrous disk forming said recess front wall, said disk being secured in said opening substantially flush with the surrounding surface of the hinge leaf.
Claim 4
Dependent Claim
42 words
In the combination recited in claim 1, said hinge leaves being non-ferrous, said surface of said one member being provided with a recess opposite said switch housing, and a ferrous metal disk rigidly mounted in said last-mentioned recess for attracting said magnet.
Claim 5
Dependent Claim
40 words
In the combination recited in claim 1, said door leaf member of the hinge being secured to one side of the door member and disposed at substantially a right angle to the jamb leaf when the door member is closed.
Claim 6
Dependent Claim
12 words
In the combination recited in claim 4, said door member being steel.
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) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |