US1176707A

US1176707A - Glass-cutter.

Info

Publication number: US1176707A
Application number: US78227913A
Authority: US
Inventors: Gustav A Bader
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-07-14
Filing date: 1909-07-14
Publication date: 1916-03-21
Anticipated expiration: 1933-03-21

Description

G. A. BADER.

GLASS CUTTER.

APPLICATION FILED IuIYsI, I9I34 1,176,707. Patenwd Mur. 21, IIIIII.

2 SHEETSSHEET 2.

E-g- 2l By Mmm GUSTAV A. BADER, 0F ROCHESTER, NEW YORK.

GLASS-CUTTER.

Specication of Letters Patent.

Patented Mar. 21, 1916` Application filed July 31, 1913. Serial No. 782,279.

To all whom it may concern.'

Be it known` that I, GUSTAV A.. BADER, of Rochester, in the county of Monroe, in the State of New York, have invented new and useful Improvements in Glass-Cutters, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in lens cutting machines, and refers more particularly to means for maintaining the cutting edge or point of the cutter normal to the surface being cut, or rather, in the most effective cutting position, irrespective of the contour of such surface or any variations in the position of the handle or tool-holder. It is well known that the cutting efficiency of these-cutters and particularly diamond cutters, is most effective when heldin a certain position, in most instances normal to the surface being cut, and that in machines for cutting lenses of differ ent surface contours other than' plane surfaces, such, for example, as torio lenses and the like having concave or convex surfaces, the .cutter is usually disposed at an angle other than normal to such surface, thereby reducing, if not' entirely destroying, the cutting efciency of the cutter, or else necessitating repeated cutting operations before the -lens is sufliciently cut to the desired form for breaking away the surplus glass.

The main object, therefore, of my present invention is to provide a machine similar to that set forth in the patent to C. W. Howland, No. 701,046, May 27, 1902 with simple means for holding the cutting edge or point in proper cutting position or normal to the surface of the glass operated upon. In other words, I have sought to' provide a machine ofthe character with a rocking cutter-support having an outstanding bearing or contact member spaced some distance apart from the cuttin edge orpoint so as to ride upon the sur ace of the glass and thereby maintain such cutting edge or point substantiall normal to said surface, or in its most e ective cutting position during the cutting operation, irrespective of the contour of the surface operated upon.

,Other objects and uses relating to specific parts of the cutting device will be brought out in the following description.

In the drawings-Figure 1 is a side elevation, partly in section, of a lens cutting machine equipped with my improved cutter.

Fig. 2 is a vertical sectional View through the front portion of the same machine, taken on line 2 2, Fig. l, showing the cutting device in operative position upon a torio lens. Fig. 3 is an enlarged vertical sectional view of the detached cutters shown in Figs. l and 2. Fig. 4 is a transverse Vertical sectional view of the lower portion of the cutter shown in Fig. 3.

When the cutting device is used in connection with a lens-cutting machine, it may be mounted in or upon the lower end of` a vertical rock shaft or spindle -1- on a horizontally swinging bracket -2- directly over a rotary lap 3- upon 'which the lens blank afto be cut is placed, said lap being rotated by gears -4- and 5- through the medium of an upright shaft -6- and is also adapted to be moved vertically to bring the lens into cutting enga-gement with the cutter bymeans of a hand lever -7-. as shown more clearly in Figs. 1 and 2.

The form of the lens is determined by a superposed rotary former -7- which is coaxial with the lap 3- and driven by one of the gears -5- at the same rate of speed as the lap and is provided in its under side with an endless groove corresponding in outline to the form of a lens to be cut, the spindle -lebeing provided with a pair of rollers riding in the groove of the former to maintain said cutter at the desired distance from and in the same relation to the axis of the lap and former.

As illustrated more clearly in Figs. 2, 3 and 4, the lens cutting device comprises a head -8- tightly fitted to the spindle -1, preferably with a taper "fit, so as to rock therewith and, upon this head is mounted a rocking member -9- having two vpoints of contact forengaging the surface of the lens during the cutting operation, one of said contacting points consisting of a diamond cutter l0- while the other member preferably. consists of a roller 1l-- spaced some distance apart from the cutting point l0- and prefel? ably held in place upon the rocking member -9- by a pivotal screw -124-. The diamond point -10- is preferably mounted in the lower end of a suitable supporting spindle or stud -13-4- which isftted tightlyv in a socket in the central portion o the rocking member -9- and is adjusted so as to bring the point of the cutter in the prO duced axis of the head -Sw and spindle -1-. The rocking member -9- is mounted upon the head -8- in such manner as to rock vertically about the cutting point of the diamond -10- and for this purpose it is provided with a circular rib -14- slidable in the corresponding circular groove *l5-1 both of which are concentric with said diamond point, the rocking member being held in operative position by a retainer plate -16- and one or more screws -l7. The contact member -11- is located in the vertical plane of rocking movement of the member -9- but some distance from the diamond point -10-, as previously explained, and its contact face is preferably disposed in the same radial plane as the diamond point so as to Contact with the surface of a lens and thereby maintain the diamond supporting spindle at substantially right angles to such surface tobring the cutting point of the diamond into the most effective cutting position. v

It is evident from the foregoing description that the diamond point and contact member are both movable with the' rocking member -9 and that the contact member -1lmoves vertically in an arc about the center of the cutting point. This rocking member is yieldingly connected to the head 8 by means of a coil spring -18- tensioned so as to rock the end of the member -9- carrying the contact member -11-v V`toward the glass to maintain contact between the rollers -11- and lens during the cutting operation and at the same time keeping the cutting point of the diamond normal to the surface of the lens. It may be necessary at times, as for example inbringing the lens in contact with the cutter, to temporarily withdraw the contact roller from its operative position and for this purpose I have provided the rocking member with a handle -19- projecting radially therefrom opposite said contact member *l1- whereby the rocking member may be operated against the action of its spring -18-. In adjusting this cutter for use, the contact oints of the cutter and roller are arranged) in a radial line with reference to the center of the lens or axis of the lap -3- wholly at one side of said axis so that the roller will bear on the lens at the inner side or nearest the center of said lens and axis, the axis of the roller being also disposed radially With reference to the axis of the lap and center of the lens so that as the point and contact member -3- is relatively short as compared with the radius of the lens or lap upon which it is mounted so as to cause the diamond point to maintain its propercutting position through any variations in contour of the Vsurface along` the cutting line. The inner or upper edge of the rocking member -9 is also concentric with the cutting point of the diamond While the head -8- is provided with a concentric recess -20- in which the coil spring is movable and adapted to ride upon the periphery of the member 9-, thereby concealing the greater portion of the spring and permitting the free operation of the rocking member without excessive friction.

What I claim is:

l. In a lens-cutting machine, the combination of a Work-holder and,a tool-holder at one side of the center of the work-holder, one of the parts being movable about such center, the tool-holder having a cutting member and a bearing member both dis-L posed in approximately the same radial line with reference to said center.

2. In a lens-cutting machine, the combination of a revoluble lens-support, a toolholder at one side of the axis of the lenssupport and provided with a cutting member and a bearing member disposed in spaced relation, in approximately the same radial line with reference to said axis.

3. In a lens-cutting device, the combination of a rotary lens-support and a rock shaft carrying a tool-holder having acutting point in the produced axis of the rock shaft, and a bearing member at 4one side of the cutting point to rest upon the lens.,

4. In a device of the character described,

a tool-holder turnable about an axis and.

comprising a head, a rocking member mounted on the head, a cutter on the rockingmember having its cutting point in said axis in all positions ofadjustment of such member, and a bearing member on said rocking member at one side of the cutter.

In witnesswhereof I have hereunto set my hand this 29th day of July, 1913.

l GUSTAV A. BADER. Witnesses:

H. E. CHASE, I H. P. DENIsoN.