US1490178A - Edging machine - Google Patents

Description

April 15 1924. I 1,490,178

A. E. MAYNARD ET AL EDGING MACHINE Filed Aug. 30

1919 5 Sheets-Sheet 1 Br I . Arm/mus April 15 1924. 1,490,178

. A. E. MAYNARD ET AL EDGING MACHINE Filed Aug. 30 1919 5 SheetsSheet' 2 FIR-F INVENTOR YV- ll GUN/VINE A 5 MAY WEED M4 ATTORNEYS April 15 1924,

1,490,178 A. E. MAYNARD ET AL EDGING MACHINE Filed Aug. 30 1919 5 Sheets-Sheet 5 INVENTOR WILLIE/'1 A. GUNNING HLBEET E. M4 YI HE -ATTORNEY6 April 15 1924 1,490,178

A. E. MAYNARD ET AL A V EQGING MACHINE Filed Aug. 30 1919 5 Sheets-Sheet 4 INVENTOR WILL/HM a. Gur/Nuva ELSE/2T 5. HEY/V1980 ATTORNEYS Patented Apr. 15, 1924.,

UNITED STATES ALBERT E. MAYNARD AND WILLIAM A.

if f nane P TENT oFricE.

GUNNINQ' or SOUTHBRIDGE, MASSACHU- SETTS, ASSIGNGR$ To MER CAN oPTIcAI. ooivI'rAnv; on OUTI-IBRIDGE, MASSA- CI-IUSETTS, A VOLUNTARY ASSOCIATION OF MASSACHUSETTS.

EDGING MACHINE.

Application filed August 30, 1919. Serial No. 320,964.

To an whom it 1mg, concern:

Be it known that we, ALBERT E. MAYNARD and IVILLIAM A. GUNNING, citizens of the United States, residing at Southbri'dge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Edging Machines, of which the following is a specification.

This invention relates to new and useful improvements in edging machines, and more particularly to that type of machine used for edging ophthalmic lenses, the leading object of the present invention being the provision of a novel, simple, and efiicient machine of the type set forth.

Another object of the present invention is the provision of novel size indicating means, and also adjustable means for varying the amount of movement and the lateral limits of a partic-ularzone of movement of the lens-holding carriage.

A further object of the present invention is the provision of novel means for connecting the lens holding shaft with the main 25 driving mechanism whereby the lens holder may be swung upwardly away from the grinding stone when it is desired to exchange the. lenses therein and can be readily returned to its operative position so that the lenses bear against the stone.

A further object of the present invention is the provision of new and novel means of connecting the lens driving mechanism with the main driving mechanismupon both sides of the lens whereby, instead of providing for driving means upon one side of the lens, means are provided whereby the lens holder is driven from each end, thus equalizing the movement applied to the lens holder.

A still further object of the invention is the provision of new and novel means for automaticallyreciprocating the hone across the face of the grinding stone whereby to provide a continuous uniform surface to the face of the stone. I

Another object of the present invention is the provision of new and novel adjusting mechanism for the former shoe which is regulated so as to accommodate various'sizes of formers, the size of the-former being indicated by the adjusting mechanism.

7 Vith the above and other objects in view, the invention consists in the novel features of construction and the combination and arrangement of parts hereinafter more fully set forth, pointed out in the claims, and shown in the accompanying drawings, in which V I Figure I a top plan view of an edging machine constructed in accordance with our invention, parts thereof being broken away and illustrated in cross section.

V Figure II is aside elevation.

. Figure III is a front elevation.

Figure IV is a side elevation of the hone mechanism. v

Figure V is a longitudinal sectional view taken through the hone mechanism, illust'rating the manner of reciprocating the hone across the face of the grindstone.

igure VI is a longitudinal sectional view taken through the mechanism for reciproeating the lens across the face of the stone.

Figure VII is a detailed longitudinal sectional view illustrating the construction olf1 the mechanism for adjusting the former s 0e.

Figure VIII; represents a detailed sectional view of the lens clamp adjusting means.

Referring now more particularly to the drawings in which the various reference characters designate the several parts throughoutthe ,views, the numeral 1 indicates the inain body portion of our improved edging machine which supports the stone 2 and the various other mechanism connected. therewith. The stone 2 is supported by means of the transverse shaft- 3 which is mounted within suitable bearings 4 supported by the body member 1, and mounted upon one end of the shaft 3 and adapted to impart movement thereto is a pulley 5 driven by a belt 6 which is connected to any suitablesource-of power. The end of theshaft 3 opposite the pulley 5 is provided with a sprocket 7 connected by means of a chain 8 to a second sprocket 9 mounted on the hone shaft 10- which is supported in suitable bearings 11- at the rear of the body member 1.

It is preferred to have a suitable housing 12 for the, hone adjusting mechanism which is supported upon the body 1 at the rear of the stone 2", and extending through this housing is a shaft 13 upon which is worm 16 with the gear teeth 15.

mounted a cam 14, said cam being provided upon its outer face with suitable gear teeth 15 adapted to mesh with worm gears 16 carried by the shaft 10, whereby when movement is imparted to the shaft 10, movement will in turn be imparted to the shaft 13 and cam 14: through the connection of the The upper face of the housing 12 is provided with a rib member 17, and slidably mounted upon the housing is the hone support 18 having formed in its lower face a suitable groove 19, dove-tailed as illustrated at 20 and adapted to be llttQd. over the dove-tailed rib 17 whereby the hone support 18 will readily slide upon the rib 17 and be securely held against any lateral movement.

In order to provide for reciprocating movement of the holder 18 a rocking arm 21 is pivoted to the shaft 22, and carried by one end of the arm 21 is a roller 23 adapted for movement within the cam 1 1, while the other end of the arm is pivotally connected to the hone carrier 18 as illustrated at 24, whereby as the sprocket of the gear 15 is rotated the roller 23 will travel in the path of the cam 1a to impart a rocking movement to the arm 21, which in turn will shift the hone support transversely upon the rib 17, thus moving the hone member 25 across the face of the stone 2. The hone 25 is mountedwithin a suitable housing 26 and securely held therein by means of the set screw 27. This housing 26 is carried by a sliding block 28 having a screw member 29 formed upon its outer end and extending through a hearing 30 carried by the arm 31. The arm 31, heretofore mentioned, is formed upon the rear face of the main hone support 18 and provided with an angular upstanding portion which carries the bearing 30. In. order to provide for adjustment of the block 28 with respect to the main hone support 18. a pulley 32 is mounted upon the outer end of the screw member 29, and wound around this pulley is a cable having attached to its free end a weight 3% so, that, as the inner end of the hone member 25 wears down the weight 34 will rotate the pulley 32 which in turn will impart movement to the screw 29 and adjust the block 28 within the hone support so as to compensate for the wear upon the end of the hone. From this it will be apparent that as the hone 25 continues to wear down by continuous pressure against the face of the stone 2, the weight 34 will impart sufficient movement to the screw member 29 to provide for a suitable adjustment of the block 28 so that the hone member 25 will be held against the face of the stone 2 at all times.

Mounted upon one end of the shaft 10 is a pulley 35 which is connec ed by means of a belt 36 to the pulley 37 which operates the lens driving mechanism. This pulley 87 is mounted upon the outer end of a shaft 3% which is supported within suitable bearings mounted upon the body member 1, and mounted upon the shaft 38 is a gear 39 meshing with the gear 40 carried by the lens driving shaft 41, whereby it will be noted that movement will be imparted to the shaft 4-1 through the medium of the shaft 38 and gear 39.

In order to provide for a suitable mount ing of this lens driving shaft i1 we have provided the bearings 42 which are supported by suitable standards 4L3 mounted upon the main or body member 1 of the machine.

As illustrated in Figure ill our improved swinging lens carriage is mounted upon the shaft 1-1 and includes the casing 16 which is tubular in construction and provided with suitable bearings 45 whereby to suitably support the same upon the shaft 11 for swinging movement. Connected with the tubular member 16 and extending downwardly are the bearings -18 which terminate in collars rS to support the stub shafts 50 of the lens holder driving mechanism. Mounted upon the right hand stub shaft 00 is the gear 51 which is adapted to mesh with one of the gears 52 carried by the shaft 4-1 and disposed at each end of the tubular body member s6. Thus as movement is imparted to the shaft 4:1, movement will also be imparted to the right hand shaft :10 through the medium of the gears 51 and The inner ends of the shafts 50 are pro vidcd with suitable clamping blocks 53 whereby one or sore lenses may be quickly secured between these two blocks for the edging operation. The left hand stnh shaft 50 is mounted for adjustment within its colla' if and provided at its outer end with a linurled linger iece 54 whereby the stub shaft an: be readily adjusted in the collar 40 for removing or placing a lens in position between the blocks This adjusting mcchanisnn as illustrated in detail in tonnection with Figure Vll l'. comprises the shaft 50 which is slidahly mounted in the bushing 103 said bushing being journaled in the arm 13 of the lens carriage. A thrust bearing 105 between the flanged end 106 of the bushing and the arm 48 serves to talre up the end thrust imparted by the artion of clamping the lens into position. The drive gear 51 has a hub portion 101 j ournaled on the hear-in 4-8 and is keyed to the bushing 106 by means of the pins 108 which extend inward through the bushing and serve as keys or splines to engage the grooves 109 in the shaft 50. whereby the shaft 50 may sliee freely through the bushing 106 but is locked to rotate with the bushing and gear as the left hand gear 5 is driven.- Mounted at the rear end of the hub and bushing is the block 110 bearing the swivel adjusting screw 111 which is provided with the knurled operating collar 54, the inner threaded end of the adjusting screw 111 being engaged in the threaded socket 112 of the lens clamp member 50 so that rotation of the member erves to move the clamp pad or block into and and out of operative engagement with the lens or lenses.

The former which regulates the size to which the lens is to be ground, is mounted upon the right hand stub shaft 50 and is adapted to bear against the former shoe 56 arranged within the rear of the swinging carriage member and disposed adjacent the grindstone This former shoe is carried by an upstanding arm 57 connected to the inner end of a movable slide 58 which extends forwardly through the body member and is provided at its outer end with an internally threaded opening 59 for the reception of a screw member 60, the outer end of said screw member being; provided with a fingerpiece 61 to provide tor ready adjustment of the screw 60 within the open-- ing 59. It will be noted from the illustration in Figure VII that the screw member 60 is provided with a. reduced portion 6:2 titted within an opening in the supporting bracket 63 whereby the fingerpiece 61 may be readily turned to imparta rotating movement to the screw 60 which in turn will impart reciprocating movement to the shaft- 58 without longitudinal movement on the part of the screw. Mounted upon the screw and disposed between the end of the shaft 58 and. the casing 63 is a pinion 64: adapted to mesh with a gear 65 which is mounted upon the inner end of a stub shaft 66. This stub shaft has a reduced threaded outer end 101 projecting forwardlv of the bracket 63 and a shoulder 102 which extends just hevon d the face of the bracket. This shoulder is adapted to receive the dial 68 while mounted on the threaded portion 101 is the thumb nut 67 which may be tightened to clamp the dial in desired rotated position upon the stub shaft 66.

It will thus be noted that rotation ot the thumb piece 61 through its screw thread connection with the slide 58 will move the slide 58 and former shoe 56. this in and out movement serving through engagement with the shoe 56 and the former 55 to control the size of lens of a particular shape which will be produced by that adjustment of the machine. At the same time the rotation of the pinion 64 will turn the gear 65 and thus rotate the dial 68, serving in conjunction with' the pointer 69 to indicate the size for which the machine has been adjusted, and it will be understood on account of the small size oi pinion and large size of gear that a number of turns may be given the thumb piece 61'to attain the desired adjustment of the contact shoe, while the'dial will slowly rotate. preterabl making: less than a complete revolution for each adjustment so that there will be no contusion in the reading obtained.

It will be understood, however, that through wear. both on the contact shoe and more especially on the face of the stone, it is desirable to have some way of compensating tor the wear. as otherwise the reading given by the dial would not-be correct after the stone has worn down somewhat but an allowance would have to be made. In place however of requiring an allowance to be made as has previously been necessary, with our improved construction it is merely necessary to loosen the thumb nut 67 and then to adjust the contact shoe to exact correct relation to the stone properly to produce a given size which be determined by the use of a tcmplet or the like. then to turn the dial until the figure on the dial corresponds with the pointer for the particular size thus determined, and then to lock thedial in position on the stub shaft by tightening the thumb screw 67. It will thus be seen that we may quickly and readily adjust the dial at any time to con'lpensate for wear of any of the lvarts of the machine.

Supported upon the standard 43 is a suitable housing- 69, and mounted within this housinp: is a shaft 70 carrying a sleeve 71 in which a spiral. or cam groove 72 is formed. and mounted upon the shaft 70 adjacent the sleeve 71 is a gear 73 adapted to mesh with the gear 7 carried by the shaft- 41, whereby movement is imparted to the shaft 70 through the gears 73 and 74 for rotation of the cam sleeve71. From the illust-ration in Figure I it will be noted that the q'ears 39 and 7d are substantially wider than the renmininegears to provide for the loi'igitudinal movement of the shaft 41. wher by the gears 1-0 and 74 may be readily moved laterally with the longitudinal movement of the shaft 11, and in order to provide For the movement of this shaft 1-1 a. lever 75 is provided. one end o't'whieh is pivotally connected to a lu z 76 carried by the housing 69. while the other end is provided with a substantially longitudinal slot in which moves the adjusting; bolt 77. This bolt 77 has formed at its lower end a. sleeve 7 8 i u'ovided with a longitudinally threaded openingin which is engaged the adjusting bolt 79. said bolt having at its outer end a thumb nut 80 to provide for rotation of the bolt within the sleeve 78.

The lever 7 5 is provided adjacent its pivoted end with a threaded opening 81 in which is secured a screw member 82, the lower end of which projects into the cam groove 72 and is provided with a, roller 83 adapted toqide' aboutwvithig thecam groove 72, whereby. as the roller rides within the cam groove 72, the shaft 4L1 will be longitudinally adjusted through the reels ing movement of the lever 7 5, and in order to provide for greater or less movement of the shaft 41, the bolt F7 is adjusted within the slot 8% through the medium of the screw bolt 79. Thus, a greater orless movement of the lens across the face of the stone may be obtained, The shift or guide bloclr 86 is loosely mounted on the shaft ll and is held against rotation with respect to the shaft by the pin 85 having one one secured in the block and slidably engaged. in the bearing The block at one side contacts with the pinion member 74 and on the opposite side is held against the pinion as by the collar 151 which. is secured on the shaft. the thrust in one direction on account of swinging movement of the cam actuated shift lever being against the pinion in one direction and in the opposite direction against the collar, The sleeve 7 8 slides in the guide way 152 formed in the upper portion of thelbloclr.

From the foregoing description of the construction it will be noted that in the edging of lenses, the lenses are first secured between the blocks 53, and the carriage, which is generally indicated by the letter A, is dropped to its operative position as illustrated in Figure I, so that the former 55 bears against the former shoe 56 and the lens or lenses secured between the blocks 53 will bear against the face of the stone 2. The machine is then put into operation, and as the shaft 41 is rotated, it will impart a rotary movement to the lens shafts 50 and 50 through the medium of the gears 51 and 52. and the reciprocating movement of the shaft 41 will be carried out through the adjusting mechanism which is illustrated in cross sectionin Figure VI.

lVhile we haveillustrated the lens carriage A. as in its operative position in Figures I and III, it will be understood that this car riage may be swung upwardly away from the face of the stone 2 and will be securely held in this upward position by means of the pivoted catch member 87 engaging with the cleat 88 which is formed upon the outer face of the sleeve 46. This upper position is preferably obtained for the removal or insertion of the lenses between the blocks 53. In order to retain the carriage A in a correct operative position, a chain 89 is connected with the carriage at the rear thereof, which in turn is attached to an upwardly extending arm 90 carried by the inner end of the shaft 91, while the outer end of this shaft is provided with an arm 92 which carries a weight 93, and from this it will be apparent that when the catch 87 is released from the cleat 88, theweight 93 will rotate the shaft 91; and retuyn the carriage A. to its operative position as illustrated. in Figures l and Ill. 1. he weight is of sufficient size to normally retain the carriage in such a position that the lenses secured between the blocks 53 will at all times be brought to bear the face of the stone 2. In providing for the ustment of the movement of the shaft il, it is preferred to provide for such adjustment through the movement of the scr w bolt 79, but should this adjustment be found to be less than the required amount, we have provided further adjusting means for the cam sleeve 71 which includes the thread.- ing of the shaft as shown at 9 the outer end of said shaft having a thumb nut 95, whereby the rotation of the shaft will provide for lateral adjustment of the sleeve 71, and in order to hold the shaft 70 securely against longitudinal movement during the operation of the machine we have provided a lock nut 96 which is threaded upon the shaft to and adapted to bear against the bearing 97 in which the shaft 70 is threaded. thus to prevent longitudinal movement of the shaft 70 within the bearing 97. This adjustment may be most readily accomplished by connecting the gear 73 and associated parts with the shaft 70 for rotation thereon but against longitudinal movement with respect thereto as through the pin 150 adapted to ride in a suitable groove in the shaft. The bearing 97 it is to be understood rotates within the frame portion or housing 69 and that the shaft member 70 is threaded into and through this hearing so that turning of the shaft imparts endwise movement to the cam and gear, while tightening of the lock nut 96 secures the parts in transversely adjusted position with respect to the bearing.

In the construction of the base member of our improved machine, the lower section which is indicated by the numeral 98 is preferably hollow so as to reduce the weight of the entire machine, and mounted upon the hollow base portion is the plate 99 which supports the various parts of the machine. This plate 99 is dctachablv connected with the base member 98 by means of suitable bolts 100 extending tln'ough the plate 99,

and engaged with suitable bearing ears carried by the base member 98.

V7 e claim:

1. The combination with a base, of an adjustable contact, a screw threaded adjustment member therefor carried by the base, a pinion on said member, a gear meshing with the pinion, a dial rotatably mounted on the face of the gear and means for clamping the dial in desired position upon the gear, substantially as and for the purpose described.

2. A lens clamp for an edging machine or the like including longitudinally movable and immovable clamp members, means for rotating the immovable clamp member, a

journal arm for the movable clamp member, a drive gear having a hub journaled exteriorly on the arm, said hub projecting beyond the arm and means keying the movable clamp member to the hub for rotation therewith.

3. A lens clamp for an edging machine or the like including longitudinally movable and immovable clamp members, means for rotating the immovable clamp member, a journal arm for the movable clamp member, a drive gear having a hub journaled exteriorly on the arm, said hub projecting beyond the arm, and means keying the second clamp member to the hub for rotation therewith, said clamp having a threaded portion and a swiveled adjusting device carried by the hub and engaging said threaded portion for longitudinally shifting the clamp member.

4. An edging machine, including a stone and a lens carriage, one of said members being laterally shift-able as respects the other, and means for imparting lateral movement to said member, said means including a slotted lever pivoted at one end, a barrel cam intermediately engaging the lever, the laterally shiftable member having a guidevvay formed therein, and a contact adjustable in the guideway and engaged in the slot of the lever to provide an adjustable connection between the lever and reciprocal member whereby the extent of reciprocations may be readily varied.

5. In an edging machine, the combination with a lens holding carriage and stone for cooperation therewith, one of said parts being mounted for lateral shifting movement as respects the other, of means for controlling said laterally shifting movement, in-' cluding a rock lever, means for rocking the lever, said lever having a longitudinal slot therein, and a contact member rigidly but adjustably held by the reciprocating part and loosely engaged in the slot of the lever whereby rocking of the lever will engage the contact to reciprocate the member on which it is mounted.

' 6. In a lens edging machine the combination with a frame and a transversely shiftable carriage mounted in the frame, of means for transversely shifting the carriage, including a lever pivoted to the frame and having a contact roller, a cam engaging the roller for rocking the lever, a contact member mounted on the carriage and in sliding engagement with the lever, and means for shifting the contact member longitudinally of the lever to vary the portion of the lever engaged thereby in its sliding movement and thus the amount of movement imparted to the carriage for a given cam throw.

7. In a lens edging machine the combination with a frame and a transversely shiftable carriage mounted in the frame, of

means for transversely shifting the carriage, including a lever pivoted to the frame and having a contact roller, a cam engaging the roller for rocking the lever, a contact mem ber mounted on the carriage and in sliding engagement with the lever, means for shif ing the contact member longitudinally of the lever to vary the portion of the lever engaged thereby in its sliding movement and thus the amount of movement imparted to the carriage for a given cam throw, and means for laterally shifting the cam to vary the particular zone of movement of the carriage for reciprocations of a given ampli tude.

8. In a machine of the character described, the combination with a frame portion and a bracket carried thereby, of a contact shoe, a slide for the shoe mounted in the frame portion, an adjusting screw swivelled in the bracket and engaging the slide for shifting the latter, a pinion car ried by the swiveled screw, an indicator gear in mesh with the pinion and having a portion projecting through the bracket, an in dicator loosely mounted on said projection adjacent the bracket, and means for securing the indicator in a desired rotatably adjusted position upon the projection.

9. In a machine of the character described, the combination with a frame, of a lens clamping mechanism carried by the frame including a fixed and a movable clamp member, a thrust bearing member journaled in the frame and held against longitudinal movement with respect thereto, a drive gear journaled on the frame and having a portion secured to the thrust bearing to hold it against longitudinal movement, the clamp member being keyed to slide within the thrust bearing and an adjusting device carried by the thrust bearing and engaging the clamp member for operating the latter.

10. In a machine of the character described, the combination with a frame arm having an interior bore and an exterior hub portion, of a thrust bearing having a bushing rotatably engaged in the bore and a three-quarter floating gear having a hub portion turning on the hub portion of the frame and an overhanging portion secured to the bushing, and a lens clamp member slidably but non-rotatably held within the bushing.

11. In a machine of the character described, the combination with a frame arm having an interior bore and an exterior hub portion, of a thrust bearing having a bushing rotatably engaged in the bore and a three-quarter floating gear having a hub portion turning on the hub portion of the frame, an overhanging portion secured to the bushing, a lens clamp member slidably but non-rotatably held within the bushing, and a threadedadjusting member carried by the rotatable parts and engaging the damp member for longitudinally shifting the same Within the bushing.

In an edging machine the combination with a driven shaft, of a guide hiock loosely mounted on the shaft and held tor iongitudinal movement therewith, means securing the block against rotation a drive pinion on the shaft, a cam having a ar portion meshing with the pinion, a slotted iever pivoted to the frame of the machine and having a portion engaged by the cam and a slotted portion overlying the block and an adjustable contact member carried by the block and engaged in the slot of the lever whereby the shaft will he reciprocated through engagement of the lever and contact upon actuation of the cam.

13. In an edging machine, the combinasignatures, in presence oi two witnesses.

ALBERT i-I. Y

TVILLIAM A. GU

Witnesses: V

H. E. COLEMAN, H. ii. .iansoxs.

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