US1225074A - Pliers. - Google Patents

Description

E. STEAD.

.PUERS.

APPLICATION FILED MAR. 31. I916.

By v I V a %2 W I I HVTQQNEY Patented May 8, 1917.

ERNEST STEAD, 0F BINGHAMTON, NEW YORK.

PLIERS.

mean

Specification of Letters Patent.

Patented May 8, 11917.

Application filed March 31, 1916. Serial No. 87,981.

To all whom it may concern:

Be it known that 1, Ennnsr STEAD, a citizen of the United States of America, and resident of Binghamton, in the county of Broome, in the State of New York, have invented new and useful Improvements in Fliers, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in pliers for reconstructing the lensclampin ears of lens-mountings in the man ner set forth in my pending application, Serial No, 87,980, filed March 31, 19 16, and contemplates the use of three cooperative pressing elements or dies consisting preferably of the main jaws of the pliers and an intermediate relatively movable or floating jaw or die, all constructed and arranged for the purpose of reconstructing each set of lens-clamping ears to conform to the thickness and contour of toric and other curved lenses which they are adapted to receive.

In other words, I have sought to provide a simple, efficient and easily manipulated device for imparting the desired spacing and curvature to the lens-clamping ears in a single operation so that the lenses may be clamped in their mountings with greater firmness and less liability of breakage or stripping the threads of the clamping screws than has heretofore been practised.

Another object is to provide means whereby the intermediate or floating jaw or die may be easily and quickly removed or replaced by dies of different curvatures.

Other objects and uses relating to specific parts of the pliers will be brought out in the following description.

In the drawings Figure 1 is a side elevation of a pair of pliers embodying the features of my inven tion, the dotted lines showing the open position of one of the jaws for removing or replacing the intermediate jaw, also shown by dotted lines as being removed or replaced.

Fig. 2 is an enlarged face view of the jaws of the pliers in the operation of reconstructing a pair of lens-clamping ears on the nose piece or bridge which is also shown in top plan, portions of the plier handles being broken away.

Fig. 3 is an enlarged detail sectional view taken on line 3-8, Fig. 1.

Fig. 4: is a perspective view of one of the intermediate jaws or dies adapted to be interposed between the main jaws of the pliers.

Fig. 5 is an enlarged face view of a slightly modified form of plier jaws for reconstructing the ears of a mounting to fit double concave lenses.

The pliers illustrated in Figs. 1, 2 and 3 are adapted for reconstructing the clamping ears of lens-mountings for receiving toric or other concavo-convex lenses and comprises a pair of main jaws or dies 1 and 2- and an intermediate floating jaw or die 3-, the bases of the main jaws 1 and 2 being crossed and pivotally connected at I l and provided with suitable handles- 5 by which the jaws may be conveniently closed and opened upon and from a set of lens-clamping ears, as a, of a lensinounting A, as shown in Fig. 2.

The inner face of the main jaw lis conveXed longitudinally to conform to the contour of the concave side of a lens which is to be fitted in the mounting A., the inner face of the main jaw 2- being concaved longitudinally to correspond to the convex contour of the same lens.

The jaws 2-2 and 3 are preferably of substantially the same width, the intermediate jaw or die 3 being elongated in the direction of length of the main jaws '2 and 3 and the active portion thereof is of substantially the same thickness and lengthwise curvature as the lens which is to be mounted.

That is, the face of the intermediate jaw adjacent to the main jaw 2 is curved longitudinally to correspond to the curvature of the convex side of a lens, while the major portion of the opposite face adjacent to the jaw 1 is curved longitudinally to correspond to the curvature of the concave side of a lens.

This intermediate jaw or die 3' is movable toward and from the inner faces of both of the main jaws 1 and -2-, but is normally held against endwise or lateral movement by a guide arm 6 which is pivoted at 7- to the jaw 1- and extends through guide slots or openings -8 and 9- in the jaws -8 and 2-, respectively.

The guide arm 6 is curved concentric with the axis of the pivot -4: of the jaws and is of sufficient length to extend across the intervening space between the main jaws during the limited opening movement v sponds to the normal width of the space between the ears, as a of the mounting -A- and is, therefore, thicker than the lens which is to be mounted between said ears, thus forming a lateral projection 10 on one side only facing the main jaw -1 and extending partially across the correspondin end of said main jaw when the jaws are c osed.

That is, the projection -10 is wholly beyond the outer end of the main aw 1- so that when the jaws are closed tightly upon a set of the ears -a, the latter will be made to conform to the contours of the opposite faces of the intermediate jaw and also the projection 10 thereon, thus producing a sharp bond, as a, at the base of the ear -a which is interposed between the jaws 1 and 3.

In this manner the major portions of the ears -aare spaced and reconstructed to conform to the thickness and curvature of the portions of the lens which they are adapted to engage, thus producing maximum areas of close contact between said ears and lens and permitting the ears to be tightly clamped upon the lens by the screw without liability of breaking such lens or stripping the threads of the screw.

Owing to the fact that only a relatively small portion of the outer end of the intermediate jaw or die is used at one time, it is possible to construct both ends of such jaw with the same or different projections 10 and witi the same or different longitudinal curved surfaces, either of which may be used by simply reversing the jaw, and in Fig. f I have shown such a jaw as having its opposite ends provided with the projections 10, although the longitudinal curved surfaces of both ends are, in this instance, similar.

In Fig. 5, l have shown a similar device for reconstructing the ears of lens-mountings for receiving double concave lenses in which the inner faces of both of the jaws 1 and 2 are convexed longitudinally, while the opposite faces of the major portion of the intermediate jaw 3- are concavcd and terminate in opposite lateral projec tiens -10 for the same purpose as those previously described.

In the construction shown in Figs. 1, 2 and 3 for reconstructing the lens-clamping ears for receiving toric lenses, the aw -2 is extended slightly beyond the corresponding end of the intermediate jaw 8 so to engage the entire length of the adjacent ear -a, thereby assuring a more accurate formation of said ear, and at the same time assisting in the formation of the sharp bend -a.

What I claim is In a pair of pliers, the combination with a pair of main jaws having longitudinally curved gripping faces, of an intermediate jaw having opposite longitudinally curved gripping faces and provided with a raised transverse rib on one of said faces at a point slightly beyond the end face of the cooperative main jaw.

In witness whereof I have hereunto set my hand this 28th day of March, 1916.

ERNEST STEAD.

Witness H. E. CHASE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0.

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