GB1568147A

GB1568147A - Spectacles

Info

Publication number: GB1568147A
Application number: GB1454777A
Authority: GB
Original assignee: Hoya Lens Corp
Current assignee: Hoya Lens Corp
Priority date: 1976-08-05
Filing date: 1977-04-06
Publication date: 1980-05-29
Also published as: AU2419477A; FR2360900B1; FR2360900A1; AU499127B2; BR7702449A; IT1072826B; NL7703980A; DE2715755A1; JPS5319039A

Description

(54) SPECTACLES (71) We, HOYA LENS CORPORATION, A Corporation organized under the laws of Japan, of 25 Kowada, Itsukaichimachi, Nishitama-gun, Tokyo, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- The present invention relates to spectacles and particularly to a pair of spectacles in which each lens fits in and is held in a frame by a rim and a V type grooved thread engaged with and suspended from the rim.

A pair of conventional spectacles comprise a frame fitted with two lenses of which the periphery edges are ground so as to be in correspondence with the shape of the frame.

In the conventional spectacles, the lenses were fitted in and supported on the frame in different ways depending on the material of the frame, thus various shortcomings were found in respective type of spectacles.

For example, in the spectacles of which the frame is made of synthetic resin, in order to make the lenses stick to the frame, it was necessary that the frame was softened by heating to 70"C to 90"C and the periphery edge-ground lenses were fitted quickly in the frame before the frame was cooled. Thus, when the frame was subsequently cooled and contracted into a stable state, the lenses were securely held in position. However, in such a method, it was very difficult to reduce the predetermined thickness of the periphery edge of the lens and to reduce a predetermined size of frame, because the edge of the lens was easily broken and the mechanical strength of the frame was reduced.Also, there were disadvantages that the visual field of the wearer of the spectacles was narrowed inevitably by making the frame thick and that further the frame, if overheated, was changed in shape and in its properties.

Further the rims of the metal frame of such an alloy as bronze, monel (Trade Mark) or German silver generally were thin and slender, and the lens-fastening screws were very small. Therefore, there were many disadvantages that the assembly work was accompanied by difficulties, great care being required. Rough use of the spectacles deformed the rims, a gap between the lenses and the frame was produced, and thereby the quality of the spectacles was deteriorated.

There were other conventional spectacles in which a nylon thread coupled to and suspended from a rim was wound along the periphery of the lower half of each lens, and had the disadvantages that the lens periphery was easily damaged by striking against a solid object since the lens periphery was exposed.

An object of the present invention is to provide a pair of improved spectacles being free from the above-mentioned disadvantages, in which lenses are capable of being fitted very easily, and in which the frame has a simple and smart construction.

The spectacles according to the invention comprise two lenses in which upper half periphery thereof is fitted respectively in the V type grooves of the rims, the lower half periphery being fitted respectively in the V type grooves of transparent high polymer threads and each of the threads is coupled with the rim and suspended from it by means of a binding bulb 9 formed at each end of the threads, after each of the threads is passed through the holes at end of each rim, so that the lenses are secured fittingly to the frame.

Various additional objects and advantages of the present invention become readily apparent from the following detailed description and accompanying drawings, wherein: Fig. 1 is a perspective view showing one form of spectacles constructed according to the present invention; Figs. 2 and 3 are enlarged views showing the manner in which the rims are coupled to the threads according to the invention: Fig. 4 is a sectional side view showing a lens fitted in the groove of the thread; Fig. 5 is a schematic view showing the manner in which the rim is coupled to the thread; Fig. 6 is a sectional view of the rim taken along the line VI-VI in Fig. 5; and Fig. 7 is a sectional view of the thread taken in the line Vil-Vil in Fig. 5.

The present invention will be explaired below with reference to an embodiment.

In Fig. 1, the frame 1 comprises rims 2, V type grooved threads 4, temples 5, a bridge 6, hinges 7 and pads 8. Each of the rims 2 has a V type groove 10 inside thereof (Fig. 6) and holes 12 (Figs. 2 and 3) through which the ends of the thread 4 are adapted to be passed.

Each thread 4 is made of a transparent high polymer with a V type groove 11 (Fig. 7) in its inside. Each end of the threads 4 is fitted in the grooves 10 in piles, at the ends of the rim 2 being passed through the hole 12 of the rim 2 and has a binding bulb 9 formed by being heated to about 1000C to 15û C. Thus the thread 4 is securely suspended from the rim 2.

In order to fit the lenses 3 in the frame 1, the edges of the lenses must be first ground in a shape complementary to that of the frame as in the prior art, and the upper half of each of the lenses is fitted in the V type groove 10 of the rim 2, while the lower half thereof is fitted in the V type groove 11 of the thread 4. Thereafter, the ends of the thread 4 are passed through the holes 12 of the rim 2 and the binding bulbs 9 are formed. Thus the rim 2 is connected with the thread 4 and the lenses are fitted securely in the frame 1.

The spectacles according to the present invention have many advantages over the conventional ones in that the process for fitting the lenses in the frame is efficient, light and easy; that no gap between the lens periphery and the thread is produced, a high quality spectacle is obtained, since the high polymer thread is pliable and tough; that the lenses are unlikely to break since the entire periphery of each lens is covered with the rim and the thread; that the cost of spectacles is reduced since frame construction is simple; and that a change of thread properties by overheating, if any, may be compensated for by easy replacement of the threads.

WHAT WE CLAIM IS: 1. A. pair of spectacles comprising a frame. rims and two lenses in which each upper half periphery is fitted in V type groove of the rim, each lower half periphery being fitted in V type groove of transparent high polymer thread, the ends of the thread being passed through holes of the rim and connected with the rim, the thread being suspended from the rim by binding bulbs formed at the ends of the thread and thereby the lenses are fitted securely in the frame.

2. A pair of spectacles as claimed in claim 1, substantiálly as described with reference to and as illustrated in Figure 1 or Figures 1 to 7 of the accompanying drawings.

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Claims

**WARNING** start of CLMS field may overlap end of DESC **.

Fig. 1 is a perspective view showing one form of spectacles constructed according to the present invention; Figs. 2 and 3 are enlarged views showing the manner in which the rims are coupled to the threads according to the invention: Fig. 4 is a sectional side view showing a lens fitted in the groove of the thread; Fig. 5 is a schematic view showing the manner in which the rim is coupled to the thread; Fig. 6 is a sectional view of the rim taken along the line VI-VI in Fig. 5; and Fig. 7 is a sectional view of the thread taken in the line Vil-Vil in Fig. 5.

The present invention will be explaired below with reference to an embodiment.

In Fig. 1, the frame 1 comprises rims 2, V type grooved threads 4, temples 5, a bridge 6, hinges 7 and pads 8. Each of the rims 2 has a V type groove 10 inside thereof (Fig. 6) and holes 12 (Figs. 2 and 3) through which the ends of the thread 4 are adapted to be passed.

Each thread 4 is made of a transparent high polymer with a V type groove 11 (Fig. 7) in its inside. Each end of the threads 4 is fitted in the grooves 10 in piles, at the ends of the rim 2 being passed through the hole 12 of the rim 2 and has a binding bulb 9 formed by being heated to about 1000C to 15û C. Thus the thread 4 is securely suspended from the rim 2.

In order to fit the lenses 3 in the frame 1, the edges of the lenses must be first ground in a shape complementary to that of the frame as in the prior art, and the upper half of each of the lenses is fitted in the V type groove 10 of the rim 2, while the lower half thereof is fitted in the V type groove 11 of the thread 4. Thereafter, the ends of the thread 4 are passed through the holes 12 of the rim 2 and the binding bulbs 9 are formed. Thus the rim 2 is connected with the thread 4 and the lenses are fitted securely in the frame 1.

The spectacles according to the present invention have many advantages over the conventional ones in that the process for fitting the lenses in the frame is efficient, light and easy; that no gap between the lens periphery and the thread is produced, a high quality spectacle is obtained, since the high polymer thread is pliable and tough; that the lenses are unlikely to break since the entire periphery of each lens is covered with the rim and the thread; that the cost of spectacles is reduced since frame construction is simple; and that a change of thread properties by overheating, if any, may be compensated for by easy replacement of the threads.

WHAT WE CLAIM IS: 1. A. pair of spectacles comprising a frame. rims and two lenses in which each upper half periphery is fitted in V type groove of the rim, each lower half periphery being fitted in V type groove of transparent high polymer thread, the ends of the thread being passed through holes of the rim and connected with the rim, the thread being suspended from the rim by binding bulbs formed at the ends of the thread and thereby the lenses are fitted securely in the frame.
2. A pair of spectacles as claimed in claim 1, substantiálly as described with reference to and as illustrated in Figure 1 or Figures 1 to 7 of the accompanying drawings.

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