US1381245A - Lens-grinding machine - Google Patents

Description

L. e. SiMPSON. LENS GRINDING-MACHINE. APPLlCATlON FILED NOV 80 \918 v v Patented June 14, 1921.

% ATTORNEYS 1 UNITED STATES OFFICE.

LEON G. SIMPSON, OF ROCHESTER, NEW YORK, ASSIGNOR TO BAUSCH 8c LOMB OPTICAL COMPANY, OF ROCHESTER, NEN YORK, A CORPORATION OF NEW YORK.

LENS-GRINDING MACHINE.

1,381,245. Specification of Letters Patent PatentedJune14, 1921.

To all whom z'tmay concern.

Be it known that I, LEON G. SIMPSON, a citizen of the United States, residing at Rochester, in the 1 county of Monroe and State of New York, have invented certain new and useful Improvements in Lens- Grinding Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My invention relates to lens grinding and polishing machines and more particularly to machines of the type known as prescription grinding machines. The object of my invention is to provide an improved overhanging-arm for the work carrier of such machines which is rotatably and longitudinally adjustable in its support for the purpose of bringing the lens being ground into cooperation with any desired part of the grinding shell or lap. Another object of the invention is to provide an overhanging arm forlens grinding machines which is adjustable to vary the leverage thereof. More pecifically, the object of my invention is to mount the work carrier spindle on the overhanging arm to be adjustable longitudinally thereof, the overhanging arm itself being mounted for universal adjustment in a support which itself is adjustable concentrically with the axis of the grinding lap for right or left hand operators.

' In the drawings; a

Figure 1 is a sideelevation of a lens grinding machine illustrating one embodiment of my invention, the base of the machine and one side of the splash basin being sectioned away,

Fig. 2 is a plan view of the same, one end of the overhanging arm and part of the table being sectioned away,

Fig; 3 is a detail sectional view of the supporting bracket for the overhanging arm, and

Fig. 4 is a section on line 4"4 of Fig. 2.

Similar reference numerals in the several figures indicate the same parts.

My invention relates to lens grinding machines, the principal features of which are disclosed but not claimed in my application for patent Ser. No. 119,157, filed Sept. 9, 1916, for lens grinding and polishing machines, a l

ing through each Application filed November 30,1918. Serial No. 264,848.

lln'said machine, a table or bench l is supported on a frame or by other preferred means not shown. A shaft or spindle 2 has a bearing'in the table and at its lower end is connected with driving means not illustrated herein. At its upper end the shaft 2 receives a grinding orabrading lap or shell 3 which is surrounded bya splash pan or basin 4. It is often desirable to substitute a polishing shell or a grinding shell of different curvature for the one in use and for this purpose the upper end of the shaft 2 is tapered, and to cooperate therewith the abrading implements are sockets as shown at 5. A work carrier 6 cooperates with the grinding shell and is held in proper working position thereon by means of a carrier spindle 7, which is adjustably secured in a bracket 8 mounted on the overhanging arm 10. The bracket is clamped to the arm to be adjustable longtudinally thereof. The overhanging arm 10 is inthe form of a rod or bar preferably cylindrical in form and extends head 11. A clamping yoke 12 has an openof its legs through which the arm 10 extends, and the part of the yoke connecting the legs lies adjacent the top of the head and has a screw threaded opening which receives a set tion is such that when the set screw is loosened, the arm is rotatably adjustableto incline or tilt the spindle, and also longitudinally adjustable to lengthen or shorten the arm. When the arm is properly adjusted, the set screw 13 is again manipulated to clamp the arm between the head and the clamping yoke to secure it in adjusted position. The head 11 is 14 which forms the head of a shaft or post 15 journaled in bearing bosses 16 and 17 provided therefor on a bracket 18. The

screw 18. The construe provided with tapered trunnioned in a yoke.

arm of the yoke 14 are provided with screw threaded openings, which receive the set screws 19, in which the head 11 is pivotally supported. It will be noted that by this arrangement, the arm 10 may be swungin a vertical plane about the axis of the trunnions 19 in the yoke 14, and also laterall about the axis of the post 15. The sha or post 15 may be adjusted vertically, and for this purpose, a collar 20 is secured thereto behind the bosses 16 and 17 by means of a set screw 21. The collar 20 fits snugly between the bosses 16 and 17 and serves as a claim and desire to secure by chine, In Fig. 2

operating therewith, a

nation of a grinding shell, operating therewith,

thrust bearing for the post 15, preventing 'axial' movement of the post which would end of the slot in said figure, and for a right ;liand-operator to the opposite end of the slot; 7

While the invention has been disclosed embodied in a machine in which the overhanging arm supports the lens carrier, it

, may quite obviously be adapted to those machines, in which there is a reversal of parts,

and in which the grinding shell is carried instead by the overhanging arm, as is old and well known in the art.

Having described my invention, what I Letters Patent is: a

1. In a lens grindin machine, the combination of a grinding shell, a lens carrier cobracket adjustable axis of the grinding concentrically, with the shell, and an overhanging arm adapted to carry the lens, carrier and supported by said bracket.

2. In a lens grinding machine, the combia lens carrier cota'table in and adjustable relative to said bracket, acollar adjustably secured to said .post and engaging said bracket to prevent axial thrust of the post in any adjusted position, and can overhanging arm adapted to carry said lens carrier pivoted to said post.

3. In a lens grinding machine, the combination with a lens carrier and grinding shell of an overhanging arm pivotally and adjustably mounted to carry one of them, a

table top on which is rotarily positioned the with a lens carrier, of a grinding operation to carry one of them,

a bracket, a post roother, a bracket supporting the overhanging arm, said bracket being adjustable, to be fixed in difierent locations on the table top, and means for securing the bracket in adjusted position on the table top.

4. In a lens grinding machine the combination with a grinding shell, of a lens carrier for cooperation therewith, a bracket, a rotatable post carried by the bracket and adjustable for height relative thereto, a thrust collar on said post, means on the bracket adapted to cooperate with either side of the thrust collar to restrict axial thrust of the post in either direction, and a manually guided arm pivotally supported by the post and adaptedto support thelens carrier.

5. In a lens grinding machine, the combination with a grinding lap, of a lens carrier for cooperation therewith, an arm adapted to support one of them, a post to which the arm is adj ustably pivoted, a thrust collar adjustable on the post, a supporting bracket for the post, bearing bosses on the bracket perforated for the reception of the post and in cooperation with each face of the thrust collar, and means on the thrust collar for adjustably clamping the sameto the post.

' 6. In a grinding machine-the combination lap for cotherewith, a pivotal arm ada ted a table top on w ich the other is rotarily mounted, a post for supporting the arm from the table,-said table top having an arcuate groove therein substantially concentric with the center line of the member rotarily mounted thereon and clamping means in cooperation with the groove and post to hold the post in any adj usted position along the groove.

7. The combination with a work holder,

7 of a cutter for cooperation therewith, a table top on which one of them is supported, an overhanging pivoted arm by which the other of them is carried and a post for supporting the arm above the table top, said post being adjustable over the table top substantially concentric with the center of that member which is supported on the table top.

LEON G. SIMPSON.

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