Патент USA US2410272код для вставки
" Octp29, 1946. ‘ G. v. DE LERY - 2,410,272‘ POCKET READING GLASS Filed April 5, 1944 INVENTOR Gamma v. DE LERY _' ATTORNEY Patented Oct. 29, __1946 2,410,272 11; T3711 1 f"."_"jr'o_oKE'r READING GLASWS ' George-dc Lery,'New York, N. Y. I‘ : I ' " Application April 5, 1944, serial no; 529,878 ' 4 Claims. 1 This invention relates to reading glasses. (01. 88-39) one short side 13 and ?nger notch M on the op posite long side I5 and spaced further away from Broadly, it is an object of my invention to pro short side l3 than ?nger notch I I. vide a reading glass with comfortable thumb and My preferred dimensions for the reading glass ?nger notches so that the reading glass can be is the exact size shown in the drawing; that is, easily held for a great length of time without 3%" long by 11/8" wide with notch ll between tiring the user; the notches being disposed so 2A3" to 1/2” from short side Hi to the center of as not ‘to interfere with the visual ?eld of the the notch, and notch 14 is 3A” to the center of lens. the notch from short side l3. The thickness at More particularly, it is an object of my inven tion to provide a reading glass or lens for easy 10 the top (Fig. 2) in the center I6 is 10 millimeters graded towards each end in variances of 1&4. of handling as an aid to the eyes in their adjust v a degree. The curvature of the glass totals 5.50 ments from distance to near-vision needs with dioptres making it possible for practically any out strain and without the need for the use of variation of a person’s eyes to bene?t by the spectacles. However, if spectacles are worn it 15 different adjustments suitable to the proper read will enhance the efficiency of the lens. ing of print. A further object of my lens is to eliminate the It should be noted that the reading glass curves both longitudinally as shown at H and laterally as shown at [8, and is bisymmetric in shape. It is important that the glass be annealed of prop er mixtures of ingredients to form a?ue crown nify without distortion due to spherical and glass of a malleability and a de?nition in the chromatic aberration. index of refraction equal to a uniform ?gure of Still a further object is to provide a lens of 1.5230. The glass is properly annealed before a focal strength graduated over the entire length and after moulding to the shape shown under and width without variation of more than one 25 predetermined temperatures and ground and pol quarter of a degree from any edge, thus provid ished with the ?nest of abrasives. ing an even distribution of spreading power and The preferred method of holding my glass is presenting parallel reading lines to the eye of to place the index ?nger in notch H at right the user. angles to the glass with the thumb in notch M A further object is to provide a reading glass so that the glass is parallel to the reading sur use of reading glasses which are mounted on the face, thus making it more comfortable for the reader. It is especially useful in cases of presby opia; my lens being so designed as to clearly mag of a focus so that it can be held about elbow face as it is moved across the page. length from the eyes; the reader using both It will be found that the reading glass will eyes to comfortably read the type without dis focus well about elbow length from the eye so tortion or color aberration. that the forearm can pivot horizontally at the Heretofore, lenses have been made that do not 35 elbow and will not be tiring to the reader. give full vision and distort the characters so It is obvious that various changes and modi? that they are not of uniform height; further cations may be made somewhat in the details of more, such lenses have chromatic and spherical construction without departing from the general aberration and are uncomfortable and too large 40 spirit of the invention, as set forth in the ap-_ for easy use. pended claims. My reading glass eliminates these disadvan I claim: tages; providing a pocket-sized glass of sufficient 1. A rectangular reading glass of the charac magni?cation evenly distributed without distor tion for easy reading and eye comfort, and .especialy adapted for reading of print arranged ter described having a ?nger notch on each of the . 45 long sides adjacent one short side, said glass in columns. For a fuller understanding of the nature and objects of my invention, reference is had to the being double convex with like opposed .curva tures, the faces being convex both longitudinally and transversely. 2. A rectangular reading glass of the charac following detailed description in connection with 50 ter described having a ?nger notch on one long the accompanying drawing, in which: side near a short side and a ?nger notch on the Fig. l is a plan View of my reading glass, and opposite long side and near the said short side, Fig.2 is a top view thereof. said last named ?nger notch being further away Referring to the drawing, numeral iii repre» ' from said short side than said ?rst named ?nger sents a reading glass of rectangular shape with notch, said glass being the central segment of a a ?nger notch II on one long side l2 and near 55 3 2,410,272 double convex circular lens of like opposed curva tures, the faces being convex, both longitudinally and transversely, and the optical and geometric centres and planes giving maximum and substan tially equal magni?cation within its focal length with no distortion or chromatic aberration. 3. A rectangular reading glass of the charac ter described having a ?nger notch for the index finger on one ‘long 'side adjacent '12, ‘short side _ 4 ing maximum and substantially equal magni?~ cation within its focal length with no distortion or chromatic aberration. 4. A rectangular reading glass of the charac ter described three times longer than it is wide and substantially 5.50 dioptres having a ?nger notch on each of the long sides adjacent one short side, said glass being the central segment o'ffa 'do'uble convex circular lens of like opposed and a ?nger n'o'tchz‘for the thumb ‘on the opposite 10 curvatures, the ‘faces being vconvex, ‘both longi long side and further away from said short tudinally and transversely, and the optical and side than said index ?nger notch, said glass being ; geometric centres and planes giving maximum the central segment of a, double convex circular ‘ lens of like opposed curvatures, the faces ‘being convex, both longitudinally and transversely, and the optical and geometric centres and planes giv and substantially equal magni?cation within its ‘focal length with no distortion or chromatic aberration. GEORGE V. BE LERY.