US1302494A - Edging-machine. - Google Patents

Description

A. A. ARNOLD.

EDGING MACHINE,

APPLICATION FILED NOV. 24. 1911.

" LB'OAQG Patented May 6,1919.

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A. A. ARNOLDL E DGING MACHINE.

I u APPLICATION FILED NOV. 24, 19]]. L3 Patented May 6, 1919,.

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TlNliTlEll) STATES PATENT @Ffllffllii.

ARTHUR A. ARNOLD, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR TO AMERICAN OPTICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSOCIA- TION OF MASSACHUSETTS.

EDGING-MAGHINE.

Patented May 5, 11919.

Application filed November 24, 1917. Serial No. 203,780.

To all whom it may concern Be it known that I, ARTHUR A. ARNOLD, a citizen of the United States, residing at Southbridge, in the county of WVorcester 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 has particular reference to an improved machine particularly adapted for use in finishing the edges of ophthalmic lenses.

The leading object of the present invention is the provision of new and improved means for imparting various speeds to the mechanism employed for grinding the edges of the lenses, and at the same time includes means whereby the various speeds are manually operated.

Another object of the invention is the provision of manually operated means whereby the mechanism can be readily operated at a low rate of speed or at a high rate of speed according to the character of the lenses being ground.

With 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 Figure 1 is a side elevation of an edging machine constructed in accordance with my invention.

Fig. 2 is a top plan view of the machine.

Fig. 3 is a detail perspective View of speed adjusting mechanism illustrating a slightly modified form of the same, and

Fig. 4 is a similar View illustrating still another form of the speed adjusting mechanism.

In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several views, the numeral 1 designates the base or tub of the edging machine, having rising therefrom the side flanges 2 provided with the bearings 3 serving to slidably and rotatably support the spindle or shaft 4: bearing the grind stone 5. Secured to the forward portion of the tub is a suitable lens holding and rotating mechanism 6 for securing in position and rotating against the stone the lenses 7, while disposed at the rear of the machine is a driven shaft 8 provided with the barrel cam 9, the foregoing parts being but briefly described inasmuch as their specific construction forms no essential part of my present invention.

As has been mentioned, the shaft 4 for the stone is both rotatable in its bearings and also slidable longitudinally therein, this sliding being effected by the shift lever 10 having at one end the yoke 11 pivotally secured to the collar 12, which is loosely mounted on the shaft and held from rotation thereon as by the fixed collar 13 or other suitable device. The opposite end of the lever 10 is provided with a roller riding in the groove 14: of the barrel cam, the lever being intermediately pivotally supported so that movement imparted to the one end through engagement of the barrel cam and roller will rock the lever and thus cause its opposite end to suitably shift the shaft 4.

N ow that the outline of the general machine has been fully set forth I will proceed to set forth the position and operation of my improved speed adjuster with respect to the main portion of the machine. Mounted upon the outer end of the shaft 4 is a worm 15 which meshes with a gear 16 upon the end of a longitudinal shaft 17 disposed at one side of the machine, said shaft having one end mounted within the bracket 18, which also assists in supporting the gear 16, while the other end of the shaft is supported in the bracket 19 at the end of the machine. Extending out fromone side of the machine is the transverse shaft 8, which supports upon its outer end a friction disk 21 and mounted upon the shaft is a coil spring 22 which bears against the rear face of the 'disk in order that the same will be normally held in close engagement with the friction pulley 23. This shaft 8 extends across the rear of the machine and is supported within suitable bearings as illustrated at 24.

The friction pulley 23 is slidably mounted upon the shaft 17 and rotated with the shaft through the medium ofthe longitudinal key and is operated by means of the yoke 26, the ends of which are engaged with in the groove 27 formed in the sleeve 28 which carries the friction pulley 23. The outer end of the arm 29, of the yoke, is pivotally mounted upon the base of the n1achine as shown at 30, said arm being moved laterally by means of the longitudinal lever 31 the outer end of which is provided with a handle member 32. This lever 31 is pro vided adjacent the handle with a plurality of notches 33 adapted for engagement with a pin 34 extending from the body of the machine, whereby the friction pulley 23 can be readily adjusted on the shaft 17 to impart various speed changes to the shaft 8. From this it will be apparent that by shifting the lever longitudinally it will impart a lateral movement to the arm 29 and shift the friction pulley over the surface of the disk 21 to obtain various speeds which are imparted to the shaft 8. It will be understood that as the pulley is moved in toward the center of the disk 2-1 a higher rate of speed will be imparted to the shaft 8 while as the pulley i moved out toward the outer edge of the disk a lower rate of speed will be imparted to the shaft.

In Fig. 3 I have illustrated a slightly modified form of the invention wherein the disk 21 is secured to the end of the shaft 17, while the friction pulley 23' is secured to the end of the shaft 8, but the operation and results are practically the same as in the preferred form of the invention. The friction pulley 23 is operated by means of a pivoted lever 31 the lower end of which is provided with a fork or yoke 35 which engages the sleeve 36 of the pulley 23 for imparting a sliding movement to the pulley. The lever 31 is provided adjacent its up per end with a spring actuated catch 37 adapted for engagement with the several notches 38 formedin the outer face of the bracket 39 which supports the outer end of the shaft 8.

From the above it will be readily appar ent that by actuating the lever 31 the ad justment of speed can be readily carried out and the lever securely held in its adjusted position by means of the spring catch 37. Furthermore it will be apparent from the above that the manner of applying the disk and friction pulley makes comparatively little difference in the operation of the machine.

In Fig. 4 I have illustrated another form of the invention in which the positions of the worm 15 and the gear 16, and the disk 21 and pulley 23 are reversed, that is to say the disk 21 is mounted on the drive shaft 4 and the gear 16 is mounted upon the shaft 8. In this form of the invention a stub shaft 40 is mounted on the base 1 and pivotally secured to the outer end of this shaft 40 is the arm 29 the upper forked end of which engages the sleeve of the friction pulley 21 in order to shift the pulley upon the shaft 17. At the rear end of the shaft 17 the gear 16 and the worm 15 are inclosed within a suitable casing as shown at 4:1, said casing being secured to the base in any suitable manner. In order that the lever 29 may be readily actuated to adjust the pulley 23 over the face of the disk 21 an actuating lever 42 is loosely connected to the lever or arm 29, the outer end of which is provided with a handle 4L3 whereby the same can be readily actuated. In order to retain the lever A2 in an adjusted position a plurality of notches 44 are formed in one edge thereof and are adapted for engagement with a pin 45 secured to the base 1 of the machine.

From the above description taken in connection with the accompanying drawings it will be readily apparent that I have provided a novel attachment for edging machines whereby the machine can be operated at three different speeds, said speeds being changed at the will of the operator. It will also be noted that while I have shown and described my improved speed changing device as applied to an edging machine it will be understood that the same may be readily applied to any machine to which the same is applicable.

I claim:

1. An edging machine including a drive shaft, a driven shaft, a disk on the driven shaft, a longitudinal shaft adjacent the ends of the above mentioned shafts, means connecting one end of the longitudinal shaft with the drive shaft, a friction pulley on the other end of the longitudinal shaft, a lever loosely connected with the pulley, an ac tuating lever connected with the first lever and adapted to be manually operated for adjusting the friction pulley over the face of the disk whereby to drive the driven shaft at different rates of speed, and means for retaining the actuating lever in various adjusted positions.

2. An edging machine including a drive shaft, a driven shaft, a disk on the driven shaft, a longitudinal shaft adjacent the ends of the above mentioned shafts, means connectin one end of the longitudinal shaft with the drive shaft, a friction pulley on the other end of the longitudinal shaft, a lever loosely connected with the pulley and adapted to be manually operated for adjusting the pulley over the face of the disk whereby to drive the driven shaft at different rates of speed, and co-acting means carried by the lever and body of the machine forretaining the lever in various adjusted positions.

In testimony whereof I have affixed my signature, in presence of two witnesses.

ARTHUR A. ARNOLD.

Vitnesses:

H. E. COLEMAN, A. S. CANN.

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

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