US1636469A - Edging machine - Google Patents

Description

. l 636 469 1927 L, H. FISHER EDGING MACHINE Filed Oct. 30.. 1922 3 Sheets-Sheet 1 I 25 5.9 K 49 5 .28 a,

m rIH f/GI INVENTOR Lit/#151151? *Jul 19, 1927-.

' L. H. FISHER EDGING MACHINE Filed Oct. 50. 1922 a sheets sneet 3 INVENTORIQ L- HF/SHER I ATTORNEY$ Patented July 19, 1927.

UNITED; STATES:

i i 1,636,469. PAT- o LYLE H. FISHER, or KANSAS CITY; MISSOURI, Assmn'onro AMERICAN OPTICAL com-- IPANY, or SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY. ASSOCIATION or MAS- SACHUSETTS.

EDGI'NG MACHINE.

Application filed October so, 1922. Serial m5. 597,879. r

This invention relates to improvements in edging machines, and has particular referce to a novel and improved form of machine especially adapted for use in the edging of ophthalmic lenses.

One of the principal objects of the present invention is the provision of a simple and efficient machine which maybe readily manually operated and whichwill serve to form a satisfactory edge of desired'configuration on an ophthalmic lens.

A further object of the invention is the provision of a machine of the type above set forth which may be employed for either bevel or rimless edging, as may. be desired.

Other objects and advantages ofthe present improvement should be readily apparent by reference to the followingspecification taken in connection, with the accompanying drawings, and it will be understood that 1 may make any niodificationsin the specific details of construction shown and described within the scope of the appended claim without departing from or exceeding thespirijt I of the lnvention.

Figure I represents a front View of one embodiment of my improvement.

Figure II represents a plan view thereof.

Figure III represents a vertical sectional view taken as on theline III-III of Figure II. I Figure IV represents a fragmentary sectional view through the contact shoe and arni and associated parts; I

Figure V represents a plan View showing the machine in operation and with the justable contact shoearm of Figure IV,

Figure VI represents a plan view of the machine of Figure V employed for bevel edging purposes.

Figure VII represents a fragmentary sec; tional view of a slightly different contin- V H v n n p H I format on hav ng the nutllfittmg intothe' uous cross feed for the carriage.

In the drawings, themun'erall designates,

the, base of nay imppwed device "'wh ar c atta m nt Jtd a tone se; 5 l k h i i i being ed em 1 id n fixe parade spects the rotating stoiie fijof suitable t fer 's li fgll s er t edits 9 e r- 1 the ph halmi watch; ema a; are

carrying the machine proper'will haveits center just at the surface of the grind-stone at the approximate point where" it would be engagedby the lens3, as is indicated by the dotted lines in Figure V of the drawing. The purpose of this is to allow of suitable oscillatory or angular adjustmentof the member ten the base 1, dependent on whether the machine is being used for riml e ss or for. bevel edging without shifting the lensacross thejface of thestone on account of'su'eh an gling adjustment. Suitable guide means such as the slot 5 may be employed to' control the relative-movement of the main and'sup 1 pleinental bases, clamp screwsor similar deselectively engaging theflnotches S in the edgeof the plate 4 servesto secure the parts in right angle relation to: the stoiie for rimless'edging or at thenormal angle for reg-1 ular bevel edging. v i Rising from the member 4 are the bracketears 9 for the spindle 10, which in Figure IIIi's shown as threaded to engage the feed nut 11 drivenas by a sprocket 12' The spindle 10'is rotatively held in the ear 9 as by the screw 13 engaged in' the groove 14 and has on its opposite'outer end the operating hand wheel portion lhl ocked in.

adjustment as by .the releasable latch "16' engaged in the notch 1701'; thehandle". This istdenablethe handle to be relea'sed and v I manually rotated if it. is desired to adjust the lens toany definite relatio to the.

grind-stone" in the feed toward"t er right and to enable the handle to be turned to draw back the lens carriage and associated parts to the left when they havehreach ed their limit :of movement. toward the ri ght, The lens carriage 'lgitself of U-shaped e a e Q: ne 119 a. he b fitb'm ev nr me h fret are lees clamp section 24 into releasing position, while continued rotation or reverse turning will allow the cam 25 to ride down on the cam surface 26 as urged by the spring until the pad 2 L is brought into correct clamping engagement with the work piece or lens 3. Opposed to the pad 24: is a second lens clamp pad 99 carried by the drive spindle 27 preferably provided with a sprocket 28 connected by the chain 29 with the sprocket portion 12 of the feed nut 11 to drive the latter.

Power is applied to the spindle 27 as by a crank handle 30 reinovably secured on the outer end of the shaft 27, as by the set screw 31. This handle has the hub portion 32 which bearsthe set screw 81 and is formed with the pins 33 to engage sockets in the former 34. In operation the former and handle are placed together with the pins interlocking with the former and the parts then slipped onto the spindle or shaft 27 and the set screw or locking device 31 tightened to secure the combined handle and former in place. The member 27 is preferably formed with a socket 35 into which the locking member 31 fits so that the former will be in definite relation to the lens clamp pads so that a lens may be properly centered between the lensclamp pads and the former will then be in definite relation to the lens.

It is to be noted that the frame 18 is sup plied with a keeper 36 adapted to be en understood that the former 34 rides on its shoe 4.6 and the shape and size of the tinished lens is thus controlled thereby.

In the operation for what known as rimless edging the lens having been placed in position between the clamp pads, the table 4 is set square with the edge of the stone 2 and the bracket 39 is set with the contact face l9 parallel with the edge of the stone. The crank handle 30 is then turned rotating the lens against the stone and the pattern or former 34 against the face 49 of the contact shoe until the lens is properly edged to correct size. During this operation the chain connection between the sprocket on the spindle 27 and the sprocket on the feed nut 11 will have caused the lens to move slowly across the face of the stone and prevent grooving of the stone. In the event that it is desired to bevel edge the lens, the lens is preferably first edged to the rimless form, after which the table 4 is swung around to the proper angle to the stone, preferably as gaged by the latch 7 and notch 8 on the table. If desired the former 3% may then be removed and the lens allowed to float against the stone impelled by the light force of the spring 38, when an equal amount will be ground off all around the periphery of the lens. If prejferred to make use of a former in connecii tion with the placing on of the bevel, or if t is the intention to bevel oif the lens after -utting and without first rimless or flat gaged by the latch 37 to hold the frame in",Bdging it, a former may be made use of of retracted position or swung back out of en- 0 n I I: gagement with the stone, as indicated 111?.

Figure II, a spring 38 tending to actuate or swing the carriage 18 toward the stone when the latch is released with relatively,

light pressure.

To control the size and shape of the lens being operated upon, I preferably pivot on the supplemental base 4: the bracket 39 adapted to be locked in desired angularly adjusted relation as by the latch member d0.

fitting down through. a slot in the back of the base of the member 39 and into selected apertures or notches ll in the base 4. This member bears at its upper end the swivelled interiorly threaded bushing d2 provided with the graduated head 43 which serves both to rotate the bushing and to cooperate with the pointer 44 to denote the amount:

of rotation. -Threaded. into the bushing is the shank or stud 45 on the contact shoe 46- which projects in its normal or average adjustment substantially into line with the pivot 47 of the bracket 39- and is provided with the pin or pins 48 sliding in the bracket 39 to prevent rotation or twisting of. the contact shoe 46ers the head 43 and bushing 42 are turned so that rotation of these parts gives adefinite inand out adjustment to the position of the contact sh oe It is to be filsubstantially the same. curve as the base curve of the lens itself, as is indicated in "iiconnection with Figure VI, this former Ipreferably having a bevel edge as at 50 iding on the shoe 49, the bracket 39 in this nstance being adjusted after angling of the table 4 so that its face will again be parallel with the face of the stone. \Vith the parts in this position the carriage may be fed back and forth along the guide rod 10 and the lens be guided over the face of the stone to be bevelled to the exact and correct size and angle. After one side of the lens has been bevelled the member 4 is then turned and the bracket 39 re-angled to again bring the face of the contact shoe parallel with the stone, when the )rocedurc is as before, placing a bevel on the second or other edge of the lens.

In Figure VII it is to be noted that I have shown a slightly modified form of feed, in which'instead of making use of the screw feed and nut, I make use of the barrel 51 having the double spiral track 52 formed thereon, in which rides the guide block 53 rotatably secured onthe lower end of the pin 54 on the lever 55 which is carried by the frame. This lever may be raised to bring the block out of engagement with the groove 52. When the block is brought downward in engagement and the member 51 rotated the barrel cam and associate parts will be laterally shifted or reciprocated back and forth automatically on the. guide 10 as the crank 30 is rotated, thebarrel cam 51 being provided with the sprocket 56 over which the chain 29 may pass to operate the latter.

From the foregoing description taken in connection with the drawings, the construction and operation of my improved hand operated combined automatic rimless and bevel edging machine should'be readily understood, and it will be seen that I have provided an extremely simply constructed but eflicient device of this character having a cross feed which will prevent grooving of the stone, having guide members to insure correct size and shape of the lens during the edging operation and in which any regular or irregular form of lens may be readily and satisfactorily edged.

I claim:

In a device of the character described, an

attachment base plate adapted to be attached

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