Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With vertical adjustment of multifocal lenses
Patent
1989-03-29
1990-05-15
Dzierzynski, P. M.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With vertical adjustment of multifocal lenses
351128, G02C 706
Patent
active
049252909
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an adjustable spectacle frame having an accessory, and includes improvements in the adjustable spectacle frame described in our Australian Patent Application No. 16351/83, based on the provisional specification PF 4901.
BACKGROUND OF THE INVENTION
In the specification which accompanied that application, there was claimed an adjustable spectacle frame having a lens frame assembly and a nose piece assembly, the lens frame assembly comprising a pair of lens frames, a frame bridge connecting the lens frames, and a pair of parallel guides depending from the frame bridge, each being of general "U" shape in cross-section.
The nose piece assembly was described as comprising a slide having a pair of parallel slide legs joined at their upper ends by a slide bridge, the slide legs being in slidable engagement with the concave surfaces of respective guides with sufficient friction to retain relative positions of the slides and guides, a pair of downwardly directed nose pad supports extending upwardly from the lower ends of the slides, and nose pads releasably retained by the supports. This arrangement made it possible to raise or lower the spectacle frame with respect to the nose pads, this being particularly convenient for persons who wanted to vary the elevation of their line of sight.
PRIOR ART STATEMENT
The closest prior art known to the applicant is British Specification 492569 (Bausch & Lomb). Other relevant art may be found in British Specifications 427831, 509979; U.S. No. 2184147; Japanese Specifications 56-34885, 59-13606, 50-157250, 55-147016, 53986, 5643769, and Australian Specification 67067/81, some of which relate to height adjustment means, but none of which comprises an accessory carried by a nose piece assembly, to which can be readily attached, or detached, a lens frame assembly of a pair of spectacles.
This invention is directed to improvements whereby accessories will be readily usable without damaging a pair of spectacles. For example, heretofore when a sunglasses accessory is used in conjunction with a pair of spectacles, it frequently clips to the spectacle frame or the lens adjacent the frame, and the clips inflict damage on the frame, the lens or both. The same can be said for lenses giving increased magnification, as for example may be worn by a watch-maker or a surgeon.
The main object of this invention is to provide improvements whereby accessories can be utilised in conjunction with a lens frame assembly.
BRIEF SUMMARY OF THE INVENTION
Briefly in this invention a spectacle frame comprises three assemblies; a lens frame assembly, a nose piece assembly and an accessory, the lens frame assembly comprising a pair of lens frames connected by a frame bridge, the accessory comprising an accessory frame which includes an accessory bridge, and the nose piece assembly having mounting means thereon which includes a hinge carried by the bridge of the nose piece assembly, which hinge supports the accessory bridge so that the accessory can be in the line of vision or retraced upwardly therefrom, the mounting means also comprising engagement means which can releasably engage the lens frame, so that the lens frame can be snapped into or out of position on the nose piece assembly.
With this arrangement the nose piece assembly can selectively engage different lens frame assemblies, and in some instances engage alternative accessories, while in other instances each accessory can itself include a nose piece assembly. If the releasable lens frame engagement means on the nose piece assembly embodies a channel section guide and the lens frame assembly is engaged by spaced slide legs depending from the nose piece bridge, the accessory together with its nose piece assembly can be quickly and easily snapped into position or released from engagement with the "U" section guides of the lens frame assembly. This provides a very convenient and very effective means whereby an accessory can be attached to a lens frame assembly or replaced with another accessory without danger of damage
REFERENCES:
patent: 2685819 (1954-08-01), Page
patent: 2842029 (1958-07-01), Roth
patent: 4113365 (1978-09-01), Koketsu
patent: 4542965 (1985-09-01), Shedrow
Dzierzynski P. M.
R. Engelhardt Nominees Pty. Ltd.
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