GB824876A - Improvements in or relating to trial frames - Google Patents

Improvements in or relating to trial frames

Info

Publication number
GB824876A
GB824876A GB851857A GB851857A GB824876A GB 824876 A GB824876 A GB 824876A GB 851857 A GB851857 A GB 851857A GB 851857 A GB851857 A GB 851857A GB 824876 A GB824876 A GB 824876A
Authority
GB
United Kingdom
Prior art keywords
bar
strip
serrated
horizontally
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB851857A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DONALD CHARLES STOWERS HILLMAN
DOUGLAS MELSON WINGATE
MELSON WINGATE Ltd
Original Assignee
DONALD CHARLES STOWERS HILLMAN
DOUGLAS MELSON WINGATE
MELSON WINGATE Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DONALD CHARLES STOWERS HILLMAN, DOUGLAS MELSON WINGATE, MELSON WINGATE Ltd filed Critical DONALD CHARLES STOWERS HILLMAN
Priority to GB851857A priority Critical patent/GB824876A/en
Publication of GB824876A publication Critical patent/GB824876A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C13/00—Assembling; Repairing; Cleaning
    • G02C13/001—Assembling; Repairing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/04—Trial frames; Sets of lenses for use therewith

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eyeglasses (AREA)

Abstract

824,876. Sight-testing apparatus. WINGATE Ltd., M., WINGATE, D. M., and HILLMAN, D. C. S. March 21, 1958 [March 14, 1957], No. 8518/57. Class 97(1) A sight testing trial frame includes two side arms, each carrying resilient means adapted to grip the head in the region of the temples. As shown, the trial frame comprises a main bar 12, having hinged thereto at 16 side arms 17 in the form of a length of stainless steel spring wire bent to elongated U-shape. Extending forwardly from the rear end of each arm is a resilient arm 24 also of stainless steel spring wire, this arm terminating in a plastic pad 25 for gripping the head of the wearer near the temples. Adjustable horizontally and vertical on the main bar 12 are trial lens holders, each comprising a ring 61 and spaced part rings 63. Integral with each ring 61 is an upstanding bar 27, which passes through slots in a channel member 29, the upper and lower sides of which extend over the bar 12. This member is clamped on the bar by a screw 38, passing through a tubular nut 35 having lugs 36 engaging slots 37 of the channel member, and pressing against a clamping piece 40. Attached to the bar 27 is a strip 43 having vertical serrations and between this strip and a horizontally serrated strip 45 attached to the bar 12, are two members 47 one being horizontally serrated and the other vertically serrated.
GB851857A 1957-03-14 1957-03-14 Improvements in or relating to trial frames Expired GB824876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB851857A GB824876A (en) 1957-03-14 1957-03-14 Improvements in or relating to trial frames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB851857A GB824876A (en) 1957-03-14 1957-03-14 Improvements in or relating to trial frames

Publications (1)

Publication Number Publication Date
GB824876A true GB824876A (en) 1959-12-09

Family

ID=9853974

Family Applications (1)

Application Number Title Priority Date Filing Date
GB851857A Expired GB824876A (en) 1957-03-14 1957-03-14 Improvements in or relating to trial frames

Country Status (1)

Country Link
GB (1) GB824876A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912613A1 (en) * 1978-03-30 1979-10-11 American Optical Corp ARRANGEMENT FOR MEASURING OPHTHALMIC REFRACTION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912613A1 (en) * 1978-03-30 1979-10-11 American Optical Corp ARRANGEMENT FOR MEASURING OPHTHALMIC REFRACTION
FR2422378A1 (en) * 1978-03-30 1979-11-09 American Optical Corp OPHTHALMIC REFRACTION DEVICE

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