US1370035A - Lens-drill - Google Patents

Description

J. MOFFITT.

LENS DRILL.

APPLICATION FILED Aus.9. 1911.

1,370,035. Patented Mar- 1, 1921.

2 SHEETS-SHEET lnew 63 l/Vl/E/VTOR JEE E 'MIAH MOFF'I TT ATTORNEYS.

' J. MOFFITT.

LENS DRILL.

APPLICATION FILED AUG.9, 1911.

1 370,035. .Pdtented Mar. 1, 1921.

2 SHEETS-SHEET 2- INVENTOR JEEE/Vl/AH MOF'F'I TT ATTORNEYS,

usa v I JEREMIAH raorrrrr, or sournsitrnen, MASSACHUSETTS, ASSIGNOR to AMERICAN orrroar cor/man or soo'rnsarnen,massacnosnrrs, A VOLUNTARY ASSOCIA- TION or'MAs'sAoi-fwsnrrs.

i,sao,os5.

To all whom itmay concern Be it known that I, JEREMIAH Morr rr, a citizen of the UnitedStates,;res1d1ng at Southbridge, in the county of Worcester and State of hl'assachusetts, have invented certain new and useful Improvements inLens- Drills,- of which the following is a specification. 7 1 I H This invention relates to improvements in drills and has particular reference to ,an.

' mic lenses.

One or the leading objects of the present invention is the provision of an improved construction in which the lens holder' or support may be readily adjusted'for decentration purposes and for angular positioni of the lens to bring'the portion being drilled normal to the drill.

;A further object 01" the invention 1s the provision of improved means for automati- 3 1 s ti'on by the screw 17, which-projects inj wardly from the member 13 adapted to ride" 1n the recessed portion"1 8joi the post 10 cally securing the lens carriage in desired an ularly adjusted position.

Other objects and advantages of my improved construction should be readily apparent by reference to-the following speci-v ficationtaken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention. 1 1

Figure I represents afront view of my complete drill with the table tilted. v

Fig. 11 represents an end viewthereof. Fig-.III represents a sectional view with the parts in non-tilted position, taken as on the line 'IIL-III of Fig. 1.]

Fig. IV represents a similar view of the parts in adjusted position. i a

Fig. V-represents a sectional view ason the line- VV of Fig. I.

Fig. "VI" represents a cross sectional view on the line VI-VI of F V.

Fig/VII represents a transverse sectional view of the lens holder bearing.

'Fig.i VIII represents a horizontal sec-'1 tional view through the lens clamp operat ing mechanism. a

, In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several LENS-DRILL.

Specification of Letterslatent. V Patented Dia 1, 1921] Application filerl'August 9, 1917. Serial No. 185,291.

views, the numeral 1 represents the base of my improved drill, having'rising from the" rear thereof the standard 2 provided with drilling point 5, and on its upper end'the I pulley 6, around which and the pulleys 7* carried by the standard 2, passes a belt 8 for dr1v1ng thesplndle and thus the drilling point 5. A handle 9. 'servesto vertically shift the drill spindle t to move the drill into and out of engagement withthe lens.

Rising. the base '1 immediately be neath the spmdle .4: 1s a postlO bearing the" pin 11, on whichis swiveled thesleeve l2 p .70 circling the post 10, the neckhaving at the conical shaped lens having thelower flared cap portion'liirn v upper end the hardened supporting point 14.

Projecting rearwardly fromthe portion 13 are the ears 15, between which are disposed thespring member 16 secured in po which thus serves to limit the. swinging aboutthe pin 11. lhe purpose of this limit-- 7 drill so that the stop 19 at the upper end of the spring may always be in proper position to engage with the edge of the lens 20 to be drilled, a set screw 21 serving to 'force the stop 19 in toward the point 14 against the action of the spring, or when; released allowing the spring to force the stop-rearwardly 1 V away from the lens receiving point. At the opposite side of thebla'se plate '1 from the parts just described is a large boss or upwardly extending portion 22 having formed" downward therethrough the cy1indrical bore or'pa'ssage 23 adapted to receive the stud 24 having near its upper end the peripheral 25, above which projects the sleeve portion 26 mounted' -upon the Stud .24. Intermediate the bo'ss 22 and flange. 25 is a ring 28 locl ed rigid with the boss,

as by the pin 29, and having in its upper edge a plurality of suitably designated: notches 30. A pivoted latch member 31 cara ried by the sleeve 26 and actuated by the spring 32 serves to engage with a selected notch to lock the stud and sleeve in rela- 8 movement or swiveling of the sleeve"12 tively adjusted position. To readily secure the stud in position andto permit of desired rotation thereof I may if desired secure to the lower end the shouldered washer 1 33 heldin position by the screw 34 and having the pin 35 interlocking with the lower end of the stud so that the washer will turn therewith and liability of loosening of the retaining screw be avoided.

It will be noted particularly by reference 7 to Figs. II and III, that the sleeve 26 is eccentrically disposed with respect to the stud andyconsequently rotation of the stud and sleeve will serve to vary the'dlstance between the sleeve and any parts carried thereby and the lens supporting point 14,

the ainount of variation being denoted by suitable figures ormarks disposed adyacent the several notches 30.

As is clearly illustrated in Fig. III for example, the socket in the stud and sleeve 26in place of being cylindricalin form is frusto-conical or tapered, this socket 36 be-' :ing adapatedto receive the exteriorly taperedsleeveor pintle 37 bearing at its upper end .the cylindrically curved seat 38, on

whichrests the semi-cylindrical shaped slide 39 bearing the lens carriage or holder 40, on which are mounted the pair of relatively movable aw members 41 having the plurality of depending lens centering pins 42 on whose heads are the lens 20. This shank of the pins, as desired.

lens 20 is automatically centered between the pairs of pins 42 on the opposite j aws,

while said pins are provided on their lower ends with the heads 43 to limit the downward movement of the lens while permitting of its upward sliding on the body portion or A suitable handle 44serves to actuate the jaws and open them any desired amount, attention -being called to the fact that the size and? curvature of the jaws as illustrated in Fig. Iis such as to permit of their receiving an extremely large lens, such as a goggle lens or the like. I V In the drillingof ophthalmic lenses it is extremely desirable that the lens be tilted to such position that the drill point will act normal to the surface being drilled, and to accomplish his result I suitably tilt the J len holding mechanism just described in the manner illustrated in Figs. I and IV. To

facilitate this result I make use of the semicylindrical seat 38-and bearing member '39 slightly during the angular adjustment thereof. I V

To permit of this tilting movement as desired and at the same time readily secure the parts in desired relation, I preferably employ the mechanism illustrated in Figs. II and III, this mechanism consisting essentially in forming the pintle 37 with an interior chamber 45 tov receive the spring 46 held by the pin 47 at the lower end and suitably secured to the lens holder bearing 38 at the opposite end, this securing device taking the/form of a pin 47 or other desired connection.

The operation of these parts should best be understood by reference to Fig. IV, from which it will be seen that the bearingmember 39 has an elongated slot formed therein, in which the securing spring46lmay ride during tilting of the table so that the spring in no wise interferes with the tilting move-. ment, the spring simply swinging about the pin 47, while at the same time the tension of the spring pressing the member 39 against its bearing 88 is sufficient to lock the parts in tilted position without additional mechanical locking members being employed. If desired, however, to supplement the retaining action of the'spring I may'employ a latch 48 adapted to be engaged in the notch 49 near the end of the semi-cylindrical member'39, as shown in Fig. II, a suitable spring 50 serving to actu'ate'the latch into-locking position, while the latch has itshandle portion projecting outwardly from the member 38 so it may be easily pressed inward and released by the thumb when the hand is resting upon the lens holder 40 to unlock the latch and allow of desired tilting of the lens holder. y

In connection with this device I wish also, to call attention to the'adustable pivot bearing or stop member, preferably in the form of ,a screw. 51 at the lower end of the spin dle 37. This member it will be seen rides on the bottom of the tapered chamber or spindle receiving socket 36, and is preferably so adjusted that the spindlewill just turn freelyin the socket while the tapered fit of the parts prevents-any relative play.

As under use the parts loosen up it is merely necessary to slightly adjust the pivot hearing 51 and allow the lens carriage to. move down when the tapered fit between the'socket and spindle will'again tighten up the relation of the spindle and socket and e1imi-. nate the play caused by wear of these parts.

From the foregoing description taken in connection with the accompanying drawings, the construction and use of my improved drill should be readily apparent, and it will be seen that it is merely necessary to open the jaws 41, as by actuation of the handle 44, when the lens 20 may be easily placed in position between the pins 42 and pressed downward to rest on their, heads '43, the operation of the structure in these respects being in accordance with prior art usage, as shown for example in patent to .Day, No. 807,064. The carriage is then set for normal or above or below center drilling,

as desired, by rotation of ,thesleeve 26 andv associatedparts, and locked by'engagement of the latch 31 in the appropriatenotch 30. The lens carriage is then swung about the spindle 37 asa center inward until the edge the desired aperture. "The lens may then beturned over and the parts reversely tilted and the second side of the lens drilled.

Particular attention is called to the fact that by the use of the tapered spindle 37' and limiting pivot 51 these parts'may be readily turned out according to standard specifications and may be quickly and easily fitted into either old or new sockets and the parts when assembled .jhave the necessary. rigidity and ease of pivotance required in a device of this nature. v f

Attention is also invited to the adjust ment which may be accomplished in connec-' tion with thetilting, bearing to take up any wear of the carriage and properly position the center of the automatic lens centering mechanism beneath the drilling'point: This is accomplished, as will be more clearly understood by reference to Fig. VII, through the use of the pair of screws or similar type of fastening members 52 which are engaged in the ends of the wall of the member 38 and have one side of their heads bearing against the end of theslide 39. It will be understood that by loosening the member or members 52 at one end and correspondingly.

tightening the similar members at the opposite end that the slide may be given a slight longitudinal adjustment in the bearing seat and thus compensate for any wear in the parts or permit of the initial adjust ment of the several parts of the machine into exact correct relation one with the other.

In Fig. VIII, I have specifically illustrated the mechanism foractuating the jaws 41. This mechanism comprises the rock shaft or member 61 journaled in the clamp arm carriage 40 bearing on its upper end the pinion 62 in mesh with the two rack portions 63 of the lens clamp jaws 41, the said racks being disposed on opposite sides of the pinion so that rocking of the handle 44 toward the left will open the jaws, and

reverse rocking of the handle will tend to close them. To facilitate this reverse turning of the pinion and parts I may secure to the pinion the spring 64 having its other end suitably secured to the member 40 so that separation of the jaws will place the spring under tension and upon release of the handleithe spring will again'closethe' jaws, clamping the lens position thereb'e tween.

'lclaimz p 1. A device of the character-described, in

cluding a base, a drill standard and drilling spindle supported-thereby, a'socketed memi her rising from thebase, a taper spindle rotatably engaged in thesocket of said memher, a bearing carried by the spindle, a lens holder having a bearing interlocking with thespindlebearing, andmeans for fricti0n-. ally forclng "the bearings into el'igag'eme'nt 1 one with the other to automatically securethe parts in desired adjusted'position' on their bearings.

2 A lens cutter including a base, a post" rotatably mounted on'the' base', means'for locking the post in desired rotatably ady justed position, an ec'centrically"disposed socket collar carried by the'post andadju'stable by rotation thereof, a spindle engaged in the socket and provided witha head of arcuate shape in cross section, a lens clamp member having an arcuate portion fitting the head, a tension-spring havin'g'one end.

secured to the lens clamp member and the other to the spindle for drawin'g the. two arcuate surfaces together, and means for locking the surfacesin desired relation.

3.;In adevice of the character described,y

the combination with alens holder, of bearing carried thereby, a second bearing frictionally engaged with the first, a base, means rising from the base to support said second bearing and a spring carried by one of the bearings and engaging the other for drawing the parts into frictional locking engagement one with the other. 7 f 4. In a device of the character described, the combination with a base, of a rotatably adjustable stud carried by the base and having a taper socket, a lens holder having. a taper spindle rotatably engaged in .the socket, and an adjustable pivot member carried by the spindle and engaging the bottom 5. In a device of the character described,

the combination with a rotatable stud, having a sleeve carried. thereby and also having an eccentric socket, a spindle rotatably mounted in said eccentric socket and laterally adjustable by rotation of the stud and sleeve, said spindle having a bearing, a lens holder having a second bearing interengaging with the bearing on the spindle, the spindle having a central socket formed therein and a spring fitting in the socket'in the spindle and having one end secured to the spindle and the other end to thelens holder for pressing the bearing surfaces of the two bearings into frictional engagement one with the other, substantially as and for the purpose described.

'6. In a device of the character described, the combination with a rotatable stud, having a sleeve carried thereby and also having an eccentric socket, a spindle rotatably mounted insaid eccentric socket and laterally'adjustable by rotation of the stud and sleeve, said spindle having a bearing, a lens holder having a second bearing interengaging with the bearingon the spindle, the spindle having a central socket formed therein and aspring fitting in the socket in the'spindle and having one end secured to the spindle and the other end to the lens holder for pressing the bearingfsurfaces of the two bearings into frictional engagement one with the other, and a latch member for supplementin the action of the spring and positively loc ing the two bearings in relatively adjusted relation.

7. .In a device of the character described,

- the combination with a base, of a boss rising therefrom, aguide ring locked on the boss, a flange member having a depending stud rotatable in the boss and a sleeve projecting above the flange, the ring being disposed about the stud between'the ring and flange,

said ring having a plurality of notches formed in its upper edge, the sleeve being eccentrically disposed as respects the stud whereby the sleeve is laterally shifted by v rotative movement of the flange member and the spring pressed latch member intermediately pivoted to the flange member, and having a depending lower end adapted to be"; selectlvely engaged in the notches of the ring, and a spring pressed upper actuating end adapted to be pressed inwardlyctoward the sleeve to disengage the lower end from,

said notches, substantially as illustrated.

8. In a device of the character described,

the combination with a cylindrical bearing,

of a support therefor, a lens holder having a slidable bearing engaging the first mentioned bearing, a spring tension device for holding the parts in frictional engagement one with the other, and supplemental'means I,

a slidable bearingengaging the cylindrical 7 bearing, a spring for holding the parts in frictional engagement one with the other, and means for relatively longitudinally shifting said parts, substantially as and for i the purpose described. V

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

H. K. PAR'SQNS, E. M. LAFLER.

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