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US4670655A
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Alarm apparatus for spatial surveillance
Assignee: HIRCHMANN RICHARD
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Filing: 1985-07-01
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Granted: 1987-06-02
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Expires: 2005-07-01
Abstract
Abstract An alarm system for the surveillance of space, with at least one sensor of electromagnetic, in particular infrared radiation, located on the closed inner frontal surface of a rectangular tube having mirror surfaces on its internal surfaces, the use of focusing means, such as lenses, concave mirrors, objectives, and the like, is avoided by that the sensor is essentially adjacent at least in one direction to the opposing mirror surfaces. This yields an alarm system that is highly compact, has small dimensions, and may be produced cost effectively. The sensor preferably consists of two spaced apart sensor elements operated in a push-pull mode.
Inventors
- 👤 Hermann Zierhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:09
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/19; G08B13/193; Y; Y10; Y10S; Y10S250/00; Y10S250/01
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
102 words
An alarm apparatus for spatial surveillance comprising at least one sensor means for sensing electromagnetic radiation, a tube with a rectangular cross section wherein said tube is open at one frontal surface, has a first mirrored inner surface and a second mirrored inner surface wherein said first and second inner surfaces are opposing surfaces and a closed inner frontal surface, said sensing means is positioned in an axially symmetric manner such that the sensor occupies in a first direction or Y axis essentially the entire length bounded by the two opposing mirror surfaces of the closed inner frontal surface of the tube.
Claim 2
Dependent Claim
102 words
An alarm apparatus for spatial surveillance comprising at least one sensor means for sensing electromagnetic radiation, a tube with a rectangular cross section wherein said tube is open at one frontal surface, has a first mirrored inner surface and a second mirrored inner surface wherein said first and second inner surfaces are opposing surfaces and a closed inner frontal surface, said sensing means is positioned in an axially symmetric manner such that the sensor occupies in a first direction or Y axis essentially the entire length bounded by the two opposing mirror surfaces of the closed inner frontal surface of the tube.
Claim 3
Dependent Claim
13 words
The alarm apparatus of claim 1 wherein said electromagnetic radiation is infraed radiation.
Claim 4
Dependent Claim
56 words
The alarm apparatus of claim 1 further comprising a third and a fourth mirrored inner surface, said third and fourth surfaces are opposing surfaces and wherein said sensor means occupies only a part of the length bounded by the third and fourth inner surfaces in a second direction or X axis perpendicular to said first direction.
Claim 5
Dependent Claim
21 words
The alarm apparatus of claim 3 wherein said sensor means comprises two spaced apart sensor elements operated in a push-pull mode.
Claim 6
Dependent Claim
16 words
The alarm apparatus of claim 3 wherein said opposing inner surfaces are parallel to each other.
Claim 7
Dependent Claim
24 words
The alarm apparatus of claim 3 wherein said opposing mirror surfaces are placed at an angle with respect to the axis of the tube.
Claim 8
Dependent Claim
11 words
The alarm apparatus of claim 6 wherein said angle is variable.
Claim 9
Dependent Claim
13 words
The alarm apparatus of claim 3 wherein said tube is a telescoping tube.
Claim 10
Dependent Claim
13 words
The alarm apparatus of claim 3 wherein said tube is made of aluminum.
Claim 11
Dependent Claim
12 words
The alarm apparatus of claim 9 wherein said aluminum tube is extruded.
Claim 12
Dependent Claim
43 words
The alarm apparatus of claim 3 wherein the tube, the surface carrying said sensor means on the frontal inner surface, and an airtight radiation permeable window located on the open front wall of the tube, form a housing hermetically sealed to the outside.
Claim 13
Dependent Claim
17 words
The alarm apparatus of claim 11 wherein the housing is a galvanically metal coated synthetic plastic housing.
Claim 14
Dependent Claim
13 words
The alarm apparatus of claim 11 wherein the housing is a metal extrusion.
Claim 15
Dependent Claim
21 words
The alarm apparatus of claim 2 wherein said sensor means comprises two spaced apart sensor elements operated in a push-pull mode.
Claim 16
Dependent Claim
16 words
The alarm apparatus of claim 2 wherein said opposing inner surfaces are parallel to each other.
Claim 17
Dependent Claim
24 words
The alarm apparatus of claim 2 wherein said opposing mirror surfaces are placed at an angle with respect to the axis of the tube.
Claim 18
Dependent Claim
11 words
The alarm apparatus of claim 16 wherein said angle is variable.
Claim 19
Dependent Claim
13 words
The alarm apparatus of claim 2 wherein said tube is a telescoping tube.
Claim 20
Dependent Claim
13 words
The alarm apparatus of claim 2 wherein said tube is made of aluminum.
Claim 21
Dependent Claim
12 words
The alarm apparatus of claim 19 wherein said aluminum tube is extruded.
Claim 22
Dependent Claim
43 words
The alarm apparatus of claim 2 wherein the tube, the surface carrying said sensor means on the frontal inner surface, and an airtight radiation permeable window located on the open front wall of the tube, form a housing hermetically sealed to the outside.
Claim 23
Dependent Claim
17 words
The alarm apparatus of claim 21 wherein the housing is a galvanically metal coated synthetic plastic housing.
Claim 24
Dependent Claim
13 words
The alarm apparatus of claim 21 wherein the housing is a metal extrusion.
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |