Apparatus for locating inter-pupilary of nose bridge mounted spe

Details Apparatus for locating inter-pupilary of nose bridge mounted spe Apparatus for locating inter-pupilary of nose bridge mounted spe

1977-06-13

1978-07-04

Phillips, Charles E.

Geometrical instruments

Gauge

Spectacle

33174A, 356127, A61B 310

Patent

active

040980022

ABSTRACT:
In combination with a lens meter for measuring along a single optical path the power of suspect optics, an apparatus for positioning nose bridge mounted spectacles is disclosed. At least one nose locator piece simulating the shape and location of the human nose is mounted for sliding movement on a bar. A bar locks vertical lens movement on the base of the lens frame at the bottom of the lenses to establish the elevation of the visual center on each lens for each eye. The transverse spacing of the nose locator piece locates the remaining coordinate of the visual center of the suspect lens. The nose locator piece, when registered to the spectacles at the nose bridge, is read through an attached and typically magnified scale to indicate nose bridge to visual center distance. By using paired nose locator pieces and paired scales, rapid measurement of nose frame mounted spectacles can occur at the spaced visual centers for the right and left eye lens to a lens meter having a monocular light path. The bar locking vertical lens movement preferably includes a pressure sensitive portion to indicate a positioned lens for measurement as well as to provide identification (left or right suspect lens) of the particular nose bridge mounted suspect lens being measured.

REFERENCES:
patent: 397744 (1889-02-01), Meylowitz
patent: 1383678 (1921-07-01), Tillyer
patent: 2481716 (1949-09-01), Black

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