Patent US3087055A successfully refreshed from Google Patents.
Patent US4563673A successfully refreshed from Google Patents.
US4563673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-theft alarm device for video cassette recorder
Assignee: VAINAGA Ltd A Co OF GREAT BRITIAN AND NORTHERN IRELAND
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Filing: 1984-04-03
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Granted: 1986-01-07
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Expires: 2004-04-03
Abstract
Abstract An anti-theft alarm device for a video cassette recorder comprises a housing in which is mounted an abutment member pivotal between an inoperative position within the housing and an operative position projecting from the housing by appropriate operation of an associated control mechanism. On location of the housing in the cassette-receiving mechanism of a recorder and with the abutment member in its operative position, said member co-operates with the recorder such as to prevent removal of the housing other than by actuation of the control mechanism. Also mounted in the housing is a battery-operated electrical switching mechanism including a movement-sensitive electric switch movable between an inoperative position and an operative position and a warning mechanism the circuit of which is completed on movement of the switch to its operative position.
Inventors
- 👤 Heinz J. B. Fechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:40
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/149; G11; G11B; G11B33/00; G11B33/005; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
An anti-theft alarm device for a video cassette recorder comprising a housing for location in the cassette-receiving mechanism of the recorder, an abutment member mounted in said housing, a control mechanism operable from externally of the housing for moving the abutment member between an inoperative position within the housing and an operative position projecting from the housing, and a battery-operated, movement-sensitive electrical switching mechanism contained within said housing and including a switch movable between an inoperative position and an operative position, and a warning mechanism the circuit of which is completed on movement of said switch to its operative position, the arrangement being such that, on location of the housing in the cassette-receiving mechanism of the recorder and with the abutment member in its operative position, said member co-operates with the recorder to prevent removal of the housing from the cassette-receiving mechanism other than by actuation of said control mechanism to move the abutment member to its inoperative position and subsequent withdrawal of the device from said cassette-receiving mechanism.
Claim 2
Dependent Claim
169 words
An anti-theft alarm device for a video cassette recorder comprising a housing for location in the cassette-receiving mechanism of the recorder, an abutment member mounted in said housing, a control mechanism operable from externally of the housing for moving the abutment member between an inoperative position within the housing and an operative position projecting from the housing, and a battery-operated, movement-sensitive electrical switching mechanism contained within said housing and including a switch movable between an inoperative position and an operative position, and a warning mechanism the circuit of which is completed on movement of said switch to its operative position, the arrangement being such that, on location of the housing in the cassette-receiving mechanism of the recorder and with the abutment member in its operative position, said member co-operates with the recorder to prevent removal of the housing from the cassette-receiving mechanism other than by actuation of said control mechanism to move the abutment member to its inoperative position and subsequent withdrawal of the device from said cassette-receiving mechanism.
Claim 3
Dependent Claim
65 words
An anti-theft alarm device as claimed in claim 1 in which the control mechanism comprises a key-operated lock including a movable member co-operating with the abutment member such that rotation of the key in the lock between a rest position and a displaced position effects displacement of said movable member and consequential movement of the abutment member between its inoperative position and its operative position.
Claim 4
Dependent Claim
56 words
An anti-theft alarm device as claimed in claim 2 and including resilient means biasing the abutment member towards its operative position such that said abutment member can be displaced from its operative position to its inoperative position by the application thereto of a force opposing the resilient bias and independently of actuation of the control mechanism.
Claim 5
Dependent Claim
72 words
An anti-theft alarm device as claimed in claim 2 in which the movable member of the lock further co-operates with the electrical switching mechanism in such a manner that, with the lock in its rest position, the circuit of said switching mechanism is broken and, with the lock in its displaced position, said circuit is primed for completion on subsequent movement of said switch from its inoperative position to its operative position.
Claim 6
Dependent Claim
56 words
An anti-theft alarm device as claimed in claim 4 in which the circuit of the electrical switching mechanism includes a time delay such that said circuit cannot be completed by movement of the switch from its inoperative position to its operative position for a predetermined period after initial rotation of the lock to its displaced position.
Claim 7
Dependent Claim
28 words
An anti-theft alarm device as claimed in claim 2 in which the key-hole of the lock projects inwardly of the housing from the front face of said housing.
Claim 8
Dependent Claim
36 words
An anti-theft alarm device as claimed in claim 6 in which, in its operative position, the abutment member projects downwardly through the bottom surface of the housing and co-operates with an edge of the cassette-receiving mechanism.
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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |