EP0118200A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Anti-theft alarm device for video cassette recorder
Assignee: VAINAGA Ltd
•
Filing: 1984-02-01
•
Granted: —
•
Expires: 2004-02-01
Abstract
Abstract An anti-theft alarm device for a video cassette recorder comprises a housing (2) in which is mounted an abutment member (18) pivotal between an inoperative position within the housing (2) and an operative position projecting from the housing (2) by appropriate operation of an associated control mechanism (12,14,16). On location of the housing (2) in the cassette-receiving mechanism (30) of a recorder and with the abutment member (18) in its operative position, said member (18) co-operates with the recorder such as to prevent removal of the housing (2) other than by actuation of the control mechanism (12,14). Also mounted in the housing (2) is a battery-operated electrical switching mechanism including a movement-sensitive electric switch (N) movable between an inoperative position and an operative position and a warning mechanism (A) the circuit of which is completed on movement of the switch (N) to its operative position.
Inventors
- 👤 Heinz Jurgen Bernhard Fechner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 07:21
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
192 words
An anti-theft alarm device for a video cassette. ' recorder characterised by a housing (2) for location in the cassette-receiving mechanism (30) of the recorder, an abutment member (18) mounted in said housing (2) and movable, by means of a control mechanism (12,14) operable from externally of the housing (2), between an inoperative position within the housing (2) and an operative position projecting from the housing (2), and a battery-operated, movement-sensitive electrical switching mechanism contained within said housing (2) and including a switch (N) movable between an inoperative position and an operative position, and a warning mechanism (A) the circuit of which is completed on movement of said switch (N) to its operative position, the arrangement being such that, on location of the housing (2) in the cassette-receiving mechanism (30) of the recorder and with the abutment member (18) in its operative position, said member (18) co-operates with the recorder to prevent removal of the housing (2) from the cassette-receiving mechanism (30) other than by actuation of said control mechanism (12,14) to move the abutment member (18) to its inoperative position and subsequent withdrawal of the device from said cassette-receiving mechanism (30).
Claim 2
Dependent Claim
192 words
An anti-theft alarm device for a video cassette. ' recorder characterised by a housing (2) for location in the cassette-receiving mechanism (30) of the recorder, an abutment member (18) mounted in said housing (2) and movable, by means of a control mechanism (12,14) operable from externally of the housing (2), between an inoperative position within the housing (2) and an operative position projecting from the housing (2), and a battery-operated, movement-sensitive electrical switching mechanism contained within said housing (2) and including a switch (N) movable between an inoperative position and an operative position, and a warning mechanism (A) the circuit of which is completed on movement of said switch (N) to its operative position, the arrangement being such that, on location of the housing (2) in the cassette-receiving mechanism (30) of the recorder and with the abutment member (18) in its operative position, said member (18) co-operates with the recorder to prevent removal of the housing (2) from the cassette-receiving mechanism (30) other than by actuation of said control mechanism (12,14) to move the abutment member (18) to its inoperative position and subsequent withdrawal of the device from said cassette-receiving mechanism (30).
Claim 3
Dependent Claim
72 words
An anti-theft alarm device as claimed in claim 1 in which the control mechanism comprises a key-operated lock (12,14) including a movable member (16) co-operating with the abutment member (18) such that rotation of the key (14) in the lock (12) between a rest position and a displaced position effects displacement of said movable member (16) and consequential movement of the abutment member (18) between its inoperative position and its operative position.
Claim 4
Dependent Claim
59 words
An anti-theft alarm device as claimed in claim 2 in which the abutment member (18) is resiliently-biased towards its operative position such that said abutment member (18) can be displaced from its operative position to its inoperative position by the application thereto of a force opposing the resilient bias (28) and independently of actuation of the control mechanism (12,14).
Claim 5
Dependent Claim
82 words
An anti-theft alarm device as claimed in claim 2 or claim 3 in which the movable member of the lock further co-operates with the electrical switching mechanism in such a manner that, with the lock (12) in its rest position, the circuit of said switching mechanism is broken and, with the lock (12) in its displaced position, said circuit is primed for completion by the switch (N) on subsequent movement of said switch (N) from its inoperative position to its operative position.
Claim 6
Dependent Claim
58 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 (N) from its inoperative position to its operative position for a predetermined period after initial rotation of the lock (12) to its displaced position.
Claim 7
Dependent Claim
36 words
An anti-theft alarm device as claimed in any one of claims 2 to 5- in which the key-hole of the lock (12) projects inwardly of the housing (2) from the front face of said housing (2).
Claim 8
Dependent Claim
40 words
An anti-theft alarm device as claimed in claim 6 in which, in its operative position, the abutment member (18) projects downwardly through the bottom surface of the housing (2) and co-operates with an edge (32) of the cassette-receiving mechanism (30).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.