Patent US562719A successfully refreshed from Google Patents.
Patent US4890092A successfully refreshed from Google Patents.
US4890092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door stop alarm
Assignee: Individual
•
Filing: 1988-10-11
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Granted: 1989-12-26
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Expires: 2008-10-11
Abstract
Abstract A wedge-shaped housing mounts a reciprocating elongate switch medially positioned and resiliently biased through an upper face of the wedge. Upon depression of the wedge by a door opening, a circuit is completed to actuate an included alarm. A variety of friction surfaces can be removably secured to an underlying surface of the housing.
Inventors
- 👤 Virgil A. Grimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:26
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/54; E05B; E05B45/00; Y; Y10; Y10T; Y10T292/00; Y10T292/65; Y10T292/67
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A portable door-securing and alarm apparatus for positioning in contiguous relationship with a door comprising, a wedge-shaped housing including a top wall, a rear wall, a plurality of side walls joining said rear and top wall and a bottom friction insert releasably secured to said side walls, and a reciprocating switch positioned interiorly of said housing and extending outwardly of said top wall and in electrical communication with an internal switch to activate an alarm upon movement of said door over said top wall.
Claim 2
Dependent Claim
84 words
A portable door-securing and alarm apparatus for positioning in contiguous relationship with a door comprising, a wedge-shaped housing including a top wall, a rear wall, a plurality of side walls joining said rear and top wall and a bottom friction insert releasably secured to said side walls, and a reciprocating switch positioned interiorly of said housing and extending outwardly of said top wall and in electrical communication with an internal switch to activate an alarm upon movement of said door over said top wall.
Claim 3
Dependent Claim
53 words
A portable door-securing and alarm apparatus as set forth in claim 1 wherein said reciprocating switch is of a "T" shaped configuration reciprocatably positionable within a complementary recess formed in said housing including a slot in said top wall wherein said reciprocating switch is normally biased to extend outwardly of said top wall.
Claim 4
Dependent Claim
27 words
A portable door-securing and alarm apparatus as set forth in claim 2 wherein said reciprocating switch includes a tapered forward portion to slidingly accept the door thereover.
Claim 5
Dependent Claim
32 words
A portable door-securing and alarm apparatus as set forth in claim 3 wherein said reciprocating switch is normally biased outwardly of said top wall by an elongate spring underlying said reciprocating switch.
Claim 6
Dependent Claim
24 words
A portable door-securing and alarm apparatus as set forth in claim 4 wherein a battery is positioned within said housing to activate said alarm.
Claim 7
Dependent Claim
24 words
A portable door-securing and alarm apparatus as set forth in claim 5 wherein said alarm comprises an audible alarm mounted onto said rear wall.
Claim 8
Dependent Claim
43 words
A portable door-securing and alarm apparatus as set forth in claim 6 wherein said bottom friction insert is slidably mounted to said housing by a plurality of dovetail projections integrally formed to said insert and received within complementary recesses formed in said housing.
Claim 9
Dependent Claim
25 words
A portable door-securing and alarm apparatus as set forth in claim 7 wherein said insert is resilient and includes a series of spaced traction projections.
Claim 10
Dependent Claim
23 words
A portable door-securing and alarm apparatus as set forth in claim 8 wherein said friction insert includes a plurality of fabric hook fasteners.
Claim 11
Dependent Claim
26 words
A portable door-securing and alarm apparatus as set forth in claim 7 wherein said insert includes a plurality of nails for frictionally engaging a support surface.
References Cited (Backward Citations)
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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) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |