US716695A - Eyeglasses. - Google Patents

Description

Y nu. 715,695. Patented4 nee. zsfloz.

w. EVANS. i EYEGLASSES.

('Appication med OQE. 1, 1902,)

(N0 Model.)

Nrrn Srnfrns Arnivr trice.

WILLIAM EVANS, OF NORFOLK, VIRGINIA.

EYEG LASSES.

SPECIFICATION forming part of Letters Patent No. 716,695, dated December 23, 1902. Application filed Gctober l, 1902. Serial No. 125,530. (No modell) To all whom t may concern:

Be it known that I, WILLiAM EVANS, a citizen of the UnitedStates, residing at Norfolk, in the county of Norfolk and State of Virginia, have invented new and useful Improvements in Eyeglasses, of which the following is a specification.

This invention relates to eyeglasses or spectacles; and the objects of the same are to provide eective meansfor securing the lenses to their supporting parts Without the use of penetrating-screws and in such manner that the lenses will be prevented from working loose and to secure the nose-guards and bridge spring to the posts in a firm and reliable manner Without the use of penetrating-screws, and thereby render the said spring less liable to breakage or fracture and also obviate loosening tendency of the same.

With these and other objects and advantages in view the invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed. i

In the drawings, Figure l is a front elevation of a pair of eye or nose glasses embodying the features of the invention. Fig. 2 is a transverse section, on an enlarged scale,

taken in the plane of the line 2 2, Fig. l. Fig. j

to designate corresponding parts in the sev-` p eral views.

Numeral l designates lenses of usual form; 2, the posts; 3, the bridge-spring, and el the guards, having attaching-arms 5. The posts 2 have outwardly-projecting pairs of clamp` ing-jaws 6, one jaw of each pair being provided with an inwardly-extending pin 7, having its free end S cut away at an inward angle of inclination or beveled, so as to provide a greater bearing-surface at one point than at a diametrically opposite point. As clearly shown by Fig. 2, the pin 7 is forced into an opening 9 in the lens l and extends only partially through the said lens and overcomes the tendency to fracture of the lens at the point where the post is attached thereto.

It is well understood by those skilled in the art that in glasses having screws passing entirely through the clamping members or jaws of the post and the lens the screws institute a pulling strain over the full thickness of the leus, and when the latter Works loose the adjacent edge portion of the lens becomes cramped or jams in the clamping member, and breakage usually ensues, particularly if the eyeglasses are permitted to be subjected to a slight blow by falling and striking a resisting surface. The present mode of attaching the clamping member of the posts to the lens is intended to overcome this defect, and, furthermore, the beveled construction of the pin 7 will prevent the lens from working loose in view` of the greater extent of bearing-surface at one side of the pin against the Wall of the opening 9 through the lens. Moreover, the improved mode of attaching the post to the lens isadvantageous in that the jaws 6 may be pinched closely to the lens and no screw is present to work loose, and hence the lens will always be held in proper focal range and position relatively to the eye.

Another advantage of the present construction of post-and-lens attachment is that the said parts may be expeditiously assembled,

and, as in all other post constructions, the

present form of pestis provided with the usual brace extensions l0 to bear against the inner edge of the lens adjacent to the point of engagement therewith of the clamping-jaws 6.

The inner end of each post is formed with a dovetail socket 1l, fully open at the top and bottom and having inwardly-converging sides l2.

The bridge-spring 3 is of usual form and has the terminals thereof provided with inwardly-struck locking-tongues 13, one being formed in each bridge-terminal. The opposite edges of the terminals of thebridge-spring are slightly beveled to corres pond with the inward angle of inclination of the sides of the sockets ll, So as to prevent the spring-terminals from moving inwardly or to have aloose play in the sockets ll.

The arms 5 of the guards 4L are of the usual IOO form of construction except that the opposite side edges 14 are beveled to correspond to the angle of inclination of the sides 12 of the sockets l1, the maximum width of the arms being materially less than the inner openings between the free terminals of the sides 12. Each arm 5 is also formed with an angular openingil5 to receive the tongue 13 on one of the extremities of the bridge-spring, which snaps into place when the parts are assembled in the said opening.

To prevent the extremities of the bridgespring 3 from Working loose or slipping out of place in the sockets 1l in a vertical direction, each of said extremities has an outer projection 13a, which fits in a recess or depression 2ad in the outer wall of the socket 1l. When the extremity of each arm 5 is inserted in the socket and locked in applied position, the bridge-spring extremity adjacent to said arm extremity is prevented from moving inwardly, and hence the projection 13a cannot become disengaged from its recess or depression.

The posts 2 are first secured to the lenses in the manner explained and the free extremities of the bridge-spring are then pushed downwardly into the sockets ll. The noseguards are then applied and the arms 5 thereof pushed upwardly into the sockets from the bottom thereof, and during such upward movement `of the arms in the sockets the tongues 13 are pressed outwardly until they coincide with the openings 15, when they immediately spring into the latter openings and lock the nose-guards firmly in piace. It will be seen from the formation of the sockets, as set forth, that the arms of the nose-guards cannot move inwardly or become disengaged from the sockets, and the spring-terminals are thus also held against inward movement and will be prevented from having longitudinal movement through the sockets by reason of the close frictional jam of the extremities of the bridge-spring and guard-arms in the sockets. The parts can be disconnected by the use of a suitable implement employed to press the tongues 13 outwardly and free them from the openings 15 in theiguard-arms; but under ordinary conditions it will be impossible for the connected bridge-spring and guardarm extremities to become disengaged from each other accidentally, and hence a firm and reliable jointure and assemblage will result. It will also be observed that the use of fastening-screws passing through the extremities of the guard-arms and bridge-spring extremities is avoided, and the strength of said bridge-spring extremities is not as materially impaired by the formation of the tongues 13 therein as in the use of penetrating screws.

The improved features of construction set forth collectively contribute to the production of a strong eyeglass and overcome the annoyance incident to loose assemblage of the lenses, bridge-spring, and nose-guard or the tendency of such parts to loosen. The same features of construction can be advantageously used in connection with, spectacles, and the cost of manufacture is not increased in view of the absence of screws and tap-holes to receive the same as in the ordinary eyeglass construction.

Having thus described the invention, what is claimed as new is- 1. A post for an eyeglass having a pair of imperforate compressible clamping-jaws, one of said jaws having a projecting pin of less length than the inner opposing sides of said jaws, the remaining jaw being smooth, and a lens having an opening therein through which the pin partially extends, the free end of the pin being beveled to increase the bearingcontact thereof on the portion of the opening through the lens nearest the post.

2. In a device of the class set forth, the combination of a post having an inner dovetail socket, a bridge-spring terminal fitted in said socket, and a guard-arm also inserted in the socket and bearing against the bridgespring terminal, the terminals of the spring and guard-arm being connected to each other by a spring-lock.

3. In a device of the class set forth, the combination of a post having an inner dovetail socket open at the bottom and top, a bridge-spring terminal inserted in said socket, and a guard-arm terminal also inserted in the socket and bearing against the bridge-spring terminal, the maximum Width of the guardarm terminal being less than the transverse extent of the inner open end of the socket, and the terminals of the spring and arm having means for locking them to each other.

4. In a device of the class set forth, the combination with a post having an inner socket, a bridge-spring and guard-arm terminals'inserted in the said socket and having interlocking means, the inner portion of the socket being of less transverse extent than the width of the guard-arm terminal, and the latter disposed against the inner side of the spring-terminal.

5. In a device of the class set forth, the combination of a post having an inner dovetail socket opening at the top and bottom and at the inner side, a bridge-spring terminal inserted downwardlyinto the socket and having a spring-tongue, and a guard having an arm inserted upwardlyinto the socket against the inner side of the bridge-terminal and provided with an opening to receive said tongue, the maximum width of the guard-arm terminal being less than the transverse extent of the inner opening of the socket.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM EVANS.

Witnesses:

FLETCHER W. ARCHER, W. H. MACKIMMIE.

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