US2243681A - Ophthalmic mounting - Google Patents

Description

y 1941- J.YJ. PQMERANZ 2,243,681 I OPHTHALMIC MOUNTING Filed March 5, 1941 ,IIIIL III/ mil INVENTOR. M4005 J. POME/Pfl/VZ BYM/M 4 TTO/P/VEYS Patented May 27, 1941 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to improvements in ophthalmic mountings and has particular reference to lenssecuring means therefor.

In mounting lenses in position on a frame, it

has been customary practice to form an opening adjacent the nasal edge of each lens for attachment of a lens strap thereto and, with the lens thus attached, to mark a point for the formation of another opening adjacent the temporal edge of the-lens in accordance with the position of a rigid lens securing member thereat. The lensis then removed and anopening is cut in the lens at the point indicated for the reception of a screw that is used to fasten the lens to the temporal securing member. It has been found that, unless extreme care is exercised in the formation of the temporal opening in the lens, more or less slight inaccuracies in the location of said opening will result. As a consequence, a strain must be put upon the lens or its mounting to register the lens opening with that in the securing member in order to receive the fastening screw and it not infrequently happens that this strain causes a cracking or breaking of the lens.

ceiving a variety of mechanical expressions one of which, for purposes of illustration, .is shown in the accompanying drawing wherein:

Figure 1 is a rear elevation, partly in section, of an ophthalmic mounting constructed in accordance with the invention.

Figure 2 is an enlarged fragmentary top plan view.

Figure 3 is a fragmentary perspective view of the mounting, showing one of the temporal connections, and

lens arid follows the contour of the upper edge thereof, and at its outer end may, if desired, terminate in an end piece 8 to which is attached the usual temple 9. The bridge 6 also has the customary pad arms i0 extending rearwardly therefrom.

At the irmer or nasal end of eachbrow arm the same is provided with an outwardly directed engagement with said member to fasten the lens I in'position. The member Ii maybe of the same construction as the temporal securing member i4 utilized to fasten the lens 5 to the mounting.

' Each member I! comprises an internally screw threaded sleeve l5 adapted to be inserted into the temporal opening iii in the lens 5. At one end of said sleeve, there is provided the annular flange i! which constitutes an abutment for the lens and when mounting the latter in position, the customary washer i8 is interposed between said flange and the inner surface 01' the lens. After the sleeve has been inserted into the opening [6, washers i9 and 20 are engaged with'the outer surface of the lens and the usual form of screw fastener 2| is then threaded into the sleeve to tighten the lens in position.

According to the usual method employed by Opticians and others skilled in the art in fastening the lenses to the mounting of the type shown herein, a lens is first formed with the nasal opening I! and is then secured to the member Ii. Thereupon, a mark is made on the lens in registration with the opening in the temporal securing member I for the purpose of indicating,

the point at which the opening it is to be made in the lens. The latter is then removed from the frame and the opening i6 out after which the lens is remounted. In the usual type of mounting of this kind wherein the temporal lens se-' Figure 4 is a horizontal section of the construction illustrated in Figure 3, with the lens in secured position.

curing member is rigid with the mounting, should there be a slight inaccuracy in the positioning oi the opening IS with respect to the lens securing member, it becomes necessary to place a strain uponthe parts in order to properly register the openings in the lens and said member so as to receive the fastening screw. This sometimes results in a cracking or breaking of theslens or of an improper positioning of the brow arm I with respect to the upper edge of the lens. In order to overcome this difficulty, the present invention provides for an adjustable connection between the temporal securing memher I4 and the brow arm which will permit of the sleeve l5 being properly aligned with the opening iii in the lens without placing any undue strain on either the mounting or the lens. Preferably, this adjustable element comprises a bendable connecting element 22 in the form of a loop, one end of which is Joined to the flange l1 and the other extremity to the end piece adjacent it point of connection with the temporal end of the brow arm. The loop 22 extends rearwardly from the end piece and then forwardly to the securing member [4 and is of such cross section and length as to permit said loop to be readily gripped with an opticians tool and flexed in any direction relative to the lens and the brow arm, and more particularly in a plane sub stantially paralleling that of the lens and in radial directions relative to the opening l5, so as to properly align the sleeve with said opening for insertion into the same preliminary to fastening the lens to the securing member.

What is claimed is:

1. An ophthalmic mounting comprising a bridge, frame elements on opposite sides of said bridge and following the contour of the edges of lenses supported by said mounting, lens securing members adjacent said bridge for attachment to the nasal portions of said lenses, a temporal lens securing member supported by each frame element for connection to a predetermined point at which an opening is formed in a lens associated with said element, and a bendable loop extending rearwardly from the rear surface of said frame element and then forwardly to said temporal lens securing member, said loop being of such cross section and of suflicient length to permit radial adjustments of said temporal lens securing member relative to the opening in said lens.

2. An ophthalmic mounting comprising a bridge, frame elements on opposite sides of said bridge and following the contour of the edges of lenses supported by said mounting, lens securing members adjacent said bridge for attachment to the nasal portions of said lenses, a temporal lens securing member supported by each frame element for connection to a predetermined point at which an opening is formed in a lens associated with said element, said lens securing members forming the only means of attachment of the lens to said frame element, and

"a bendable loop extending rearwardly from the rear surface of said frame element and then forwardly to said temporal lens securing member,

brow arm, means to secure the nasal portion of said lens to said brow arm, a temporal lens securing member joined to said end piece for alignment with an opening formed in said lens adjacent the temporal edge thereof, and a bendable loop of substantial length joining the rear of said end piece with said temporal securing member in such manner as to enable the latter to be shifted relative to said brow arm and its lens in any direction in a plane substantially paralleling the same so as to center said securing member with respect to said opening.

4. An ophthalmic mounting comprising a bridge, brow arms each extending from said bridge and following the contour of the upper edge of a lens in a plane in the rear thereof and terminating at a point adjacent the temporal edge of said lens, a temple end piece extending rearwardly from the temporal extremity of each brow arm, means to secure the nasal portion of said lens to said brow arm, a temporal lens securing member including an internally threaded sleeve adapted for insertion into an opening formed in said lens adjacentthe temporal edge thereof, said securing member being joined to said end piece for alignment of said sleeve with said opening, and a bendable loop of substantial length Joining the rear of said end piece with said temporal securing member in a manner to enable'the latter to be shifted relative to said brow arm and its lens in any direction in a plane substantially paralleling the same so as to center said sleeve with respect to said opening preliminary to engaging the sleeve therein.

' JACOB J. POMERANZ.

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