Security lock for cassette recorders and cassette players or theft discouragement device for cassette recorders and cassette players
US4527405A · kind A · utility
74Cited by
2References
3Claims
0Family size
Inventors
Key dates
| Filing date | Apr 25, 1983 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Apr 25, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A key-driven mechanism 14 that locks into the cassette-insert opening 12 of an audio/video cassette recorder or cassette player 10. After insertion into the cassette recorder or player, rotation of a key 16 extends cams from within the device to prevent removal of the device. The device includes a lock 20 mechanism with removable key, a helical turn screw and screw sleeve by which key rotation is translated into lineal movement, a cam-actuator affixed to the screw and which is moved by the turning of the key and cams 24 that are coupled to the actuator and which extend from the device or retract as a result of key rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.