Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For interpupillary distance measuring or lens positioning
Patent
1986-03-10
1987-09-15
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
For interpupillary distance measuring or lens positioning
33200, A61B 310
Patent
active
046935738
ABSTRACT:
An universal frame centering, holding and measuring device for use by an optician to transcribe and check a distance interpupillary distance a reading interpupillary distance, a segment height measured onto a customer, directly and precisely on a set of lenses mounted on a frame. The device comprises a base having a longitudinal axis, on which the frame may be positioned in flat position. A central pin supporting a vertical cylinder having such diameter as to fit within the bridge of the frame, projects from the base. A frame holder is slidably mounted onto the base. The frame holder is movable along the longitudinal axis of the base and comprises a vertical front wall extending perpendicularly to the longitudinal axis of the base. The frame holder is pressed toward the central pin in such a manner as to hold the frame in substantially rigid position between the vertical front wall of the frame holder and the vertical cylinder mounted onto the central pin, with this vertical cylinder inserted into the bridge portion of the frame. A pair of rulers are slidably mounted on the base, parallel to its longitudinal axis in such a manner as to extend under the two lenses mounted on the frame respectively. A set of vertical graduation is provided on each ruler, each vertical graduation indicating the distance separating it from the central pin and being useful for transcribing onto the lenses and checking the distance P.D. or reading P.D. of the customer. A set of horizontal graduations is also provided on each ruler, these horizontal graduations being useful for transcribing on the lenses the segments heights or progressive horizontal cross line of the customer.
REFERENCES:
patent: 2491312 (1949-12-01), Henry et al.
patent: 4252419 (1981-02-01), Padula, II et al.
Bovernick Rodney B.
Dzierzynski P. M.
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