Anti-theft device for spectacle frames
Patent 5144820 Issued on September 8, 1992. Estimated Expiration Date: 
February 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAttachment device Antitheft device for articles having at least an arm element, in particular spectacles Patent #: 4991413 InventorAssigneeApplicationNo. 655404 filed on 02/18/1991US Classes:70/57.1, For antitheft signaling device on protected article70/34, Single stem or shank351/111TemplesExaminersPrimary: Luebke, Renee S.Assistant: Boucher, D. Attorney, Agent or FirmForeign Patent References
International ClassG02C 011/00AbstractThe invention relates to an anti-theft device for spectacle frames, which consists of an elongate body (10, 11) to be clamped to one bow of the spectacle frame, said body comprising a sleeve (10) open at one end thereof and having a transverse aperture (12) to receive therein the bow. Furthermore, said body is provided with a sensor (33) affecting an anti-theft system. A slide (15) displaceable longitudinally of the sleeve can be adjusted for engagement and disengagement of the bow by a screw (18) locked against axial displacement in the sleeve. The screw can be operated manually when the anti-theft device is to be mounted and demounted by a special tool only, which can be inserted into the sleeve through the open end thereof to engage an engagement element (22) of the screw located inside the sleeve. | |
