US839345A

US839345A - Lens-grinding machine.

Info

Publication number: US839345A
Application number: US29917006A
Authority: US
Inventors: Anton Wagner
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-02-02
Filing date: 1906-02-02
Publication date: 1906-12-25
Anticipated expiration: 1923-12-25

Description

No. 839,345. PATENTED DEC. 25, 1906. A.-WA-GNER.

LENS GRINDING MACHINE.

APPLICATION FILED FEB.2,1906.

INVEN TOR. 12101?- Wagfifr ATTORNEY.

" render such a lens-grinding machine automatic in its operation and to provide it with skilled operator.

' 5 is the driving-shaft 6, by which motion is the other end is connected to an upr' ht post or column 12 by means of a joint s own in 'trated in the Unite .ANTON WAGNER, OF PHILADELPHIA, PENNSYLVANIA...

' LENS-GRINDING MACHINE.

Specification of Letters Patent. Application filed February 2, 190a. Serial No. 299.170.

Patented Dec. 25, 1906.

To all whom it may concern:

Be it known that I, ANTON WAGNER, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and use' ful Im rovement in Lens-Grinding Machines, of which the following; is a full, clear, and com lete disclosure.

invention relates to'those lens-grinding mac es in which a rotary motion and also a reciprocatin motion in one direction are given to one 0 a air of grinding members, such a machine e' disclosed and illus- States Patent No. 646,672, granted to me April 3., 1900.

The objectofthe present invention is'to means for causing one of the grindin mem-. bers to perform as closely as possi Ie the motions usually given to it at the hands ofa Briefly, my invention consists in providing a machine such as is shown in the said patent with a simple and efficient means for reciprocating-the upper member.

. For a full, clear, and exact descri tion of m invention reference may be ha to the f0 lowing specification and to the accompanying drawings, forming a part' thereof, in which similar figures of reference indicate corresponding parts in the various views.

Figure 1 shows in perspective my improved lens-grind machine. Fig. 2 is a vertical central sectionof the same. Fig. 3 is a section on line 3 3 of Fig. 2, showing a detail of my invention. l

1 indicates a baselate upon which is mounted a casing 2, inc osing t e lens-grinding machine, of which 3 indicates the upper grinding member and 4 the lower grindmg member. Mounted on the base 1 in bearings communicated to the finding-surfaces and upon which is mounted the tlght and loose pulleys 7 and 8, controlled by the beltshipper 9..v

10 indicates'a pressure-lever by which the reciprocating motion is communicated to the" up er. grinding member. Said lever is 1'0- (led at one end with the handle 11 an at detail. in Fig. 3. Said joint consists of a rectangular plate 13, the two opposite sides of which are provided with or cars 14, ex-- tending at rightangles to the plate ,13. To the remaining two sides 'of the plate 13 are secured lugs 15 15, which also extend at right angles to the plate 13, but. in a direction opposite to that of the lugs 14. The bolt 16,

passing through the ears or lugs 14, secures one end of the handle to the plate and a similar'bolt 17, passing through the ears 15 secures the plate 13 to a bracket 18, provided with ears 19. By this means-the pressureumn 12 by a joint connection which permits the lever to be oscillated in anydirection. This bracket 18 is adjustably clamped 22, in which. is adjustably secured a bolt 23,

lever is virtually secured to the post or colprovided with nuts 24 and washers 25, en-

gaging either side of the presssure-lever' 10. The lower end of the bolt 23 is reduced in diameter and engages the upper member.

By the above construction it will readily be seen that the lever 10 can be used to apply pressure to the upper member and also to reciprocate said-member with respect to the lower grinding member.

ressure-lever 10 is further rovided with a 00k 29, the shank of whic rests within a slot 30 in the top of an upWardly-projecti lug 31, attached to a link 32. To one end i the link 32 an adjustable pitman 35 is attached, which in turn has its outer end in engagement with a crank-pin 36, mounted adjustably on thecrank 37 on then per end of a shaft 38, which, passing throug a bea 39 on the base 1, carries a pulley 40, rotziiaild from the main driving-shaft b means of the belt 41 and pulley42. Attac ed to the base or table 1 is a helical spring 33, to the free end of which the hook 29 is connected by means of a chain 34. 'Also secured to thebase 1 is a second helical spring 43, its free end being connected to the other side of the link 32 by a chain 44.

From the above description of the con-f The end of the pulley 40'. By means of the crank 37 and connecting rod or link 35 the linkt32 -.will .be drawn in one direction, carrying with it the pressure-leverlO. When'the shoe has been drawn to the full throw of the crank,'it will be drawn back by. the spring 43. In this manner a reciprocating motion is communicated to the lever and through it to the upper grinding-surface. The spring 43 operatmg in oppositionto the pull of the-connecting-rodpermits the rod 35 to be made of light constructionand-entirely avoids theeffects of 1 backlash in the crankand-pitman connection. By adjusting or changing the.

length-of the-chain 34 agreaterorless amount of pressure-cambeapplied to the pressure-lever LO-andthnough the pin .or bolt 23 tothe upperg'linding member, while by moving the crank-pin toward or away'irom the center .of

the shaft-38 a greater orless amount of recip-' rocation canbbe 'ven' to' the said grindingsurface. Upon t e casing 2 is mounted a bracket, 26, adjustable -vertically upon the casing ,bymeans of:- the slot .{27 and thumbscrew 28. This provides-a shelf or table tor the-reception of the link 32-when the oscillation and the pressuresapplying devices :are disoonnected'from' the endoh the pressurelever 10.

0 :By means of the above-described invention-,g'rindingmachines which are now operated only by sldiled; mechanics can be rendered'automatic in their movement, and, secondly, thecost-of the productionof-compound 3 5 lenses can be greatly reduced.

As the power tor-communicating motion to the l'eciprocating-arm= 10 is derived from the shaft which -rotates the 4 surfaces, bothmotions will be startedand stopped @at 0 the .same instant, thus insuring uniformity and. perfection in the product. Furthermore,'- by "reason of the peculiar above-described constructions the mechanism for reciprooating'the lever-10 canbe completely disconnected, and, if necessary; the finishing touches of the. grinding can be performed, as heretofore, by-the hands of a skilled mechanic. 'In this way one skilled workman is enabled to attend to a number ofmachines,

and a high-grade hand-finishedlens is prop1 pressure to said lever.

. 3. :In a

duce'd. I

-What I claim-as myinvention, and desire toprotect by Letters-Patent of the United States, is a '1. In a lens --grinding machine, a lever, means to oscillate the same, and yielding means-acting transversely tor the plane of the oscillation for applying pressure to said lever.

12. In a lens-grinding machine, a lever universally pivoted at one end, means to oscillate the same a yielding means acting transversely to the plane of the, oscillation for aplens-grin machine, a lever,- a un versal joint by whic one end of-said lever means is supported, means for adjustin said joint vertically, means to oscillate sai lever, and yielding means acting transversely to the plane of the oscillation of said lever for applymg pressure thereto.

4. In a lens-grinding machine, a lever fulcrumed at one end, means to oscillate said lever in one direction, yielding means to oscillate the said lever in the opposite direction, and yielding means acting transversely tothe plane of the oscillation for applying pressure to said lever.

5. In a lens-grinding machine, the combi nation of a pressure-lever, and means'for oscillating the same, consisting of a crank and pitman -for drawing the said lever in one direction, and an adjustable yielding means for drawing said lever in the opposite direction. =6. In a lens-grinding machine, the combination of a pressure-lever, a crank and pitman, a sprin working in opposition to said crank and a justable connection secured to said spring, a link attached to said pitman and said connector, means for connecting said link with the free end of said pressurelever.

7. In a lens-grinding machine, the combination of apressure-lever, a link, means for oscillating said link,-a pressure-applyin device, means for attaching said pressureever to said link and to said pressure-applying device.

-8. vIn a-lens-grinding machine, the combination with agrinding member,-of a pressurelever fulcrumed at one end,. means'to oscillate the saidlever in a plane substantially parallel to the plane of the said grinding member, yielding means for applying pressure to said lever in a'direction at right angles to the plane of the oscillation of said lever, and means for-communicating the motion of {)he pressure-lever to the said grinding memer.

9. In a lens-grinding machine, the combination with a grinding member, of a pressurelever fulcrumed at one end, means to oscillate said pressure-lever in a plane substan tially parallel to the lane of the said grinding member, means or applying pressure. to said lever in a direction transversely to the plane of the oscillation of the said lever, and means for communicating the motion of the pressure-lever to the said grinding member.

10. In a lens-grinding machine, the combination with a gr1nding-member,of a pressurelever fulcrumed at one end, means to draw the said lever in one direction in a plane substantially -parallel to the plane of the said I (girinding ,member, independent means for rawing the lever in the opposite dlrection,

' or applying pressure to said lever m a plane transversely to the plane of the osclllation of said pressure-lever, and means for communicating the motion of the pressurelever to the said grinding member.

11. In a lens-grinding machine, the combination with a grinding member,of a pressurelever fulcrumed at one end, means for positively drawing the pressure-lever in one direction and in a plane substantiallyparallel to the plane of said grinding member, independent yielding means for drawing the pressure-lever in the opposite direction, means for applying pressure to said lever in a direction transversely to the plane of the oscillation of said pressurelever and means for communicating the motion of the pressure-lever to the said grinding member.

12. In a lens-grinding machine, the combination with a grinding member,of a pressure lever fulcrumed at one end and provided at the other With a hook, a link engaging said hook, means to oscillate said link, means also connected to said hook for a plying a pressure to said hook transversely to the plane of the oscillation of said pressure-lever.

13. In a lens-grinding machine, the combination with the grinding members, of a driving-shaft, a supplemental shaft geared to sald driving-shaft, a ressure-lever, means connected to the supp emental shaft and to said lever for drawing the lever in one direction, inde endent means for drawing the pressure ever in the opposite direction,

means for applying pressure to the said lever in a direction transverse to the plane of the oscillation of said pressure-lever, and means intermediate of the ends of the lever for communicating the motion of the lever to one of the grinding members.

14. In a lens-grinding machine, the combination with the grinding members, of a driving-shaft, a lever provided at one end with the universal joint, a supplemental shaft geared to said driving-shaft, means connected to the supplemental shaft and to the free end of said pressure-lever to oscillate said lever in one direction, yieldin means also connected to the free end of t c said pressure-lever to oscillate said lever in an opposite direction, a second yielding means tending to move the said free end in a direction transverse to the plane of the oscillation of the lever, and means for communicating a resulting motion of said pressure-lever to one of the grinding members.

In wltness whereof I have hereunto set my hand this 30th day of January, A. D. 1906.

ANTON WAGNER.

Witnesses:

J. HENDERSON, HARRY COBB KENNEDY.