US1306514A - Nelson m - Google Patents

Description

N. M. B

OPHTHALMIC ING.

' LLLLLLLLLLLLLLLLLLLLLLLLLL s. 1,306,514.. Patented Juna 10, 1919.

' INVENTOR /\/ELC0/\//\1- BA KER HsHzdW A TTOR/VEYS E soN M. (BAKER-.025 soorrmn nen, iviAssAcnUsErrs, AssIGNon'ro AMERICAN OPTICAL COMPANY, OFQSOUTHBRIDGE, MA$$ACHUSETTS, AICORPORATION;OF

MASSACHUSETTS.

- OPHTHALMIC MOUNTING.

V Specification of Letters Patent; Patente dlJ 11119 10, 1919, 1

Application filed July 24, 1916. Serial No. 110,973.

To all whom it may concern:

Be it known that I, NELSON M. B KER, a citizenv of the United States, residing at Southbridge, in the county of'Worcester' a single piece of material without the neces sity of soldering or otherwise connecting the several parts.

A further object of the invention is the provision-of an improved manner of constructing. lens clip from filled material which willinsure every exposed portion of the clip being covered with the precious metal and will expose no flat edges and which will consequently eliminate allliability of tarnishing or discoloration ofithe clip at the edges as is liable to occurwith ordinary constructions of lens clips or fittings of filled material. '4

{Other-objects and advantages of-my improved method. of construction for fittings for ophthalmic .mountings should- 'be read ily apparent by reference tofollowing de pended claims without departing from or x i g e r t fm nv ntion-1 J Figure I represents a fragmentary view o'f the swaged stripfrom which-my clips are made.

IIgrepresent s a view of oneQofg-the blanks from which my clip is formed. f

tion of the; first operation.

Fig.1

Fig. IIIrepresentsa view of thecomple- 0nd operation.

-=F s u h r pe ia i ni v represents an -en'd gview of? the clip at the completion of these operations.

-- scription taken in. connection with the acf companying drawings, and itwill be understood thateIimay make any modificationsr in ,the specific details 'of construction shown and describe d within the scope of the ap V represents a view during the sec}- g. Y represents side elevation showing the clip at the completion ofthis operation; represents a view illustrating a Fig. VIII represents a, side elevation illii-s-L trating' the manner'of spreading the closed end of theclip. a

.Eig. IX represents a semi-diagrammatic view illustrating'the combined machine for carrying out certain parts of the-operation.

X represents. a5 similar viewfl illusmanner in which the clip might 1g. trating one be completed.

Fig, XI represents a p'erspectiveview of the completed fitting.

In the drawings, in which similar charac-l ters of referencefare employed to denote corresponding parts, the numerall designates as an entiretya blank adapted for the formation of one of my. improved one-piece.

clips; This blank I have "shown" as preferably formed from a solid'barioffnaterial as indicated in Fig.1, although itwill'be'fun derstood that this bar may be eitherisol'id or tubular-as may be preferred. i a

In thef'form of'invention particularly illustrated, however, I have'shown the bar from which the blanks 1 are formed. as a strip of solid materialof suflicient original ductility or sufiiciently annealed to render I p h H strikingor swaging an easy operation, it-being'understood that.

formation thereof by the operation inconnectionwith atuhular piece would be the same, the main a van g being. readiness of compression or forming in the case t rely inca'sedi by he p c m tal PQIF tlon 3. r

It is to beun derstood tli'atlofgcourseimy process? is adapted for use in 1, connection With l gol rrp sqio s;m talsbut 1s particularly desirable for use in connection with mountings of gold-filled or simi-;

- lar filled material in; that by using the proo ess as hereinafter"described'I' am able to maintain the precious metal coating 3 substantially intact andun-brokenover the entire 'finished .-article; a, feature which has been previously pointedoutas .es'peci'ally dea basemetal core.

\ sirable in connection with. material's having result I form of blanks connected merely by the extremely narrownecks 1.4, "Separation being finally? efi'ected at the neck 4, leaving a. very slight of a hollow-strip-In. any event. I firstrswage or reduce the strip to fo"rmTT a plurality or: blanks 1 each com; Busing i d ir s etal cor 2 n-f v a. 711 As before mentioned, to accomplish this byswaging or striking? aser'ies" Crx Cir

portion of core 2 exposed at each end of the blank. I then preferably cut out or mill one end as at 5 to provide a V-shaped notch, after which I am ready to proceed with the formation of the clip proper. j i

In the formation of the clip I suitably strike the blank on opposite sides to form a portionsubstantially Hshape in crosssection as illustrated in Fig. IV, having the central connecting web 6 and the pair of lateral portions or ears 7 the end of the web 6 being slightly inside the termini of the ears 7 on account of the V-shaped notch at 5 just referred to.

Q A form of machine for constructing this portion of the clip is diagranmiatically illustrated in Figs. IX and X from which it will be seen that the side striking may be done by the jaw members 8 and 9 engaging the blank at diametrically opposite points, one

of said jaws being provided with the exten-- sion 10 on which the other jaw mays'lide, while the jaws are adapted to slide between the second pair of forming jaws or shapers 11 and 12 which are just spaced sufiiciently to allow of movement of the jaw members 8 and 9 there-between. In use the blank may be dropped downward into the recess between jaws 11 and 12 till the notch5 rests on the portion 10 as indicated in connection with Fig. VI, when the aws 8 and Qmay be brought together to strike the material substantially into the shape shown in cross-section in Fig. IV, this striking forming the reduced web 6 and at the same time forcing the side ears 7 outward into the shaping recesses or faces 13 and 14 of the jaws 11 and 12 respectively. At this timethe blank will present substantially the appearance 111C111 cated in Fig. V. I th'en preferably level off the end of the web member 6 and continue the formation of the completed clip by striking the upper or outer end of the blank as by the wedgelike hammer 15, indicated in Fig. VIII, this member serving to drive downward the entire blank whereby the web is formed with a flattened shoulder as illustrated in Fig. XI showing the completed article and at the same time the ma teri'alof the blank is forced tightly against the shaped faces 13 and 14 of the jaw members 11 and 12 and is'caused to assume approximately the shape of the inner face of these members. In addition the striking with the wedgelike member 15 spreads the outer end of the blank to produce the later:

ally extending shoe or strap portions 1'] at" each side of the clip as indicated in connection with Fig. VIII.

It is to be understood that these operations may be performed either sequentially in a single machine, may be separately performed in different machines, may be performed substantially simultaneously by a single operation ofthe one machine or may be formed separately and the blank or partially produced article annealed after each operation as may prove most desirable in connection with the handling of different materials or in the formation of different shapes of clips or clips from different weights of material, the essential feature of the invention being the process by which the completed article is produced, broadly speaking.

In any event it will ordinarily be found necessary at least after the completion of the operation illustrated in Fig. VIII, to anneal theblank or partially finished article before attempting to completely finish the same. The article having been annealed it is then placed between suitable forming or clamping jaws such as the jaws 8, 9, 11 and 12 previously referred to and is similarly struck at the outer exposed end as by ashaping hammer 18, having the shaped portion 19 to finally shape the outer end of the strap into its desired form and to at the same time additionally force downward and outward the material forming the side ears 7 to cause them to exactly conform to the inner faces of the jaws and be produced with clcancut, sharp edges and smooth regular surfaces such as are desired in the finished clips. It will of course be understood that a certain amount of this striking and forming operation may be done by reciprocation of the jaw members 11 and 12 in place of performing the operation entirely by the forcing of the material down thereinto, this being a matter of selection according to the taste of the individual manufacturer or producer of the article. H

From the foregoing description taken in connection with the drawings the general steps in the process of forming my one-piece lens fitting having the central web, the lateral ears and the strap portions for engaging the edge of a lens should be readily apparent, and it will be seen that in the original blank a slight portion of the base metal is exposed. at each end of, the blank, that in the formation of the shoe or strap member 17 the general formation thereof is such as to cause a certain portionof the surface'material adjacent to the exposed base metal portion to flow over the base metal while at the" same time any exposed base metal parts will come at the exact center of the shoe at the point where the remainder of the mounting is soldered or secured thereto so that in the completed article no base metal will be exposed at this point. The only base metal remaining exposed in connection with the entire article is disposed at the V,-shaped notch 5, while this material is so disposed that any portion whatever of base metal remaining exposed in the final article will be located only at the end of the web member 6. This web member 6 is adapted to fit within a slot or the like in a lens and to be retained by a suitable filler, which consequently will be entirely concealed and protected in the completed mounting. It will therefore be apparent from the above that I have provided an improved process of constructing a one-piece fitting for lenses in a simple and efiicient manner and in a manner in which all exposed parts and edges in a case of filled material will be thoroughly protected and covered by the original precious metal shell without the necessity for additional plating or the like to cover the same.

I claim:

1. The process of forming a one-piece ophthalmic lens fittting, consisting in shaping a blank, and striking the blank to form a central web having integral with each side thereofa lens engaging ear.

2. The process of forming a fitting for an ophthalmic lens, consisting in shaping a blank, striking the sides of the blank to form a member substantially H-shape in cross section, and striking the end of the blank to expand the material into final shape.

3. The process of forming an ophthalmic fitting, consisting in reducing a bar of material to a series of blanks connected by thin necks, separating the blanks, striking one of the blanks at diametrically opposite points to produce a substantially H-shaped piece in cross section, and compressing the sides of the H into desired shape.

fitting, including shaping a blank, milling the end of the blank, fitting the milled end over a former, and striking the opposite end of the blank to cause the milled portion thereof to conform to the shape of the former.

6. The process of forming a lens fitting, consisting in striking a blank on opposite sides to form an H-shaped member in cross section, pressing the sides of the H into desired shape, securely holding the blank,

with a portion projecting from the clamp,

expanding the projecting portion into laterally extending ears, and rounding said expanded portion, substantially as illus trated.

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

NELSON M. BAKER.

Witnesses:

EDITH M. HALvoRsEN', ESTHER M. LOFLER.

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

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