US1778494A - Universal attachment for lathes - Google Patents

Description

' Oct. I4, I930. A. F. GRONWALD Y 1,778,494

UNIVERSAL ATTACHMENT FOR LATHES Filed Jan. 16, 1929 2 Sheets-Sheet l Figure2isapartial front view showing the justment of slide 18 is performed by means Patented a. 14, 1930 1,778,494

UNITED STATES PATENT OFFICE AUGUST FRIEDRICH GRONWALD, OI ZINTEN, GERMANY UNIVERSAL ATTACHMENT non LATHES Application filed January 16, 1929, Serial No. 332,818, and in Germany March 24, 1927.

My invention relates to an universal attach- 11 securely fastened on slide 9. The threadment for lathes, it is of a simple construced spindle 10 is worked by means of handle 12. tion, can be attached to all lathes of usual Two plates numbered 13 connect the handle build, and permits the lathe to be used as 12 with the threaded spindle 10,they are proan universal machine tool for many purposes vided with bore holes through which the for which hitherto special machine tools shaft of spindle passes and revolve freely were a necessity. Further, the attachment around spindle 10 above and below the ratchet enables in most instances the changing of wheel 14 which is securely fixed to the shaft tools without removing the work-piece. of spindle 10. Between the two plates 13 two 10 The nature of my invention and its disratchets or detents 15 are placed on hinges. 60

tinguishing features and advantages will They are operated through nut 16. Accordclearly appear as the description proceeds. ing to the direction nut 16 is turned, one or Reference is to be had to the accompanythe other of the ratchets or detents 15 is put ing drawings forming a art of this specifiinto action and grips into the teeth of the 15 cation, it being understoo that the drawings ratchet wheel 14. Slide 9 can then, accordare merely illustrative of one example of the ing to the way nut 16 is set, be raised or invention. lowered by moving handle 12.

Figure 1 is a front view of the attachment For slide 18 a horizontal guide way 17 is embodying my invention. provided on the surface of slide 9. The ad- 70 use of the attachment for a special purpose. of crank 19 which turns the threaded spindle Figure 3 is a plan view. 20 having threaded engagement with nut 21 Figure 4 is a side view. located on the bottom side of slide 18. If Figure 5 is a partial side view showing slide 18 is not required it can be dismounted the use of the attachment for a special purtogetherwith threaded spindle 20 and crank 75 ose. 19. p Figure 6 is a vertical section of the attach- Ifthe attachment is to be used as a vise for ment on line 66 of Figure 3. holding work-pieces on which work is to be Figure 7 is a horizontal section on line 7-7 performed with milling or grinding tools of Figure 1. placed between the stocks of the lathe, slide 30 Similar numbers refer to similar parts 18 serves as the movable vise jaw, as illusthroughout the several views. t-rated in Figure 2, and as fixed vise jaw In the drawings: 1 is a lathe carriage serves part 22 placed from the other end on to mounted in the usual way on the bed of the horizontal guide 17 and fastened there in the lathe, 2 is a slide movable transversely of the usual way. bed by means of crank 3. On this slide 2 and Tools can be fastened on to slide 18 by united with it is a base 4: for mounting, turnmeans of clamp plate 23 in connection with ing and fixing the attachment. All these clamp nut 24. For adjusting the horizontal parts being common to lathes in general use. position screw 25 is provided. In this way, Numeral 5 represents a base plate or socle for instance, a turning tool can be fastened located on the vertical guide way 6,it revolves as shown in Figure 5, and the elevation rein the usual way on base 4 by means of pin quired for the edge of tool 26 in regard to 7 fastened to its bottom side and can be fixed the work-piece can be adjusted by operating on base 4 in any position desired by means handle 12. Cranks 8 and 19 serve to regulate of screw holes 8. the advance. On guide way 6 is slide 9 vertically mov- The numeral. 27 indicates a block which able. The elevation is performed by means can also be secured to slide 18 by means of of the threaded spindle 1O revolvably fasclamp plate 23. For greater security two tened to the base plate or socle 5 having pins are mounted on its underside adapted 0 threaded engagement with the bore of nut to enter bore-holes on slide 18. Block 27 serves as e301. holder for rod shaped tools such as drills, broaches, etc. For this purpose it is provided with a conical bore for the reception of the tool.

In Figure 1 it is clearly shown how block 27 can be used to hold a grooving tool 28, a rod with a projecting blade on its end. According tov the groove required, the breadth of the blade is chosen. 7 Grooving tool 28 is put into motion by means of crank 19 and supported during its activity by idler 30 revolving on adjusted in regard to height. Frame 32 is fastened to slide 9, it can be removed.

On the back of slide 9, on its side surface 33, the detachable table 34 is mounted. As

shown in Figure 3 without work-piece and.

in Figure 4 with work-piece 35, this table serves principally for holding long workpieces such as shafts, axles, spindles, into which a groove is to be cut or on which other Work is to be performed. To secure a safe position for round work-pieces on table 34 its surface is provided with a longitudinalgroove 36. The hoops 37 on both ends of the table hold the work-piece securely when screwed together with plates 38 fastened to the lower side of thetable. To admit grooves to be out without hindrance, the hoops are open on the top.

Numeral 39 indicates a swinging part of table 34 secured in theposition desired by means of cones 40 and screws 41, This swinging part 39 is principally designed for hold-v ing such work-pieces which must be placed inv an inclined position when worked on. It is clearly shown in Figure 6 that in this Way,

for instance, bevel wheel 42 can be fastened V to the swinging part 39 by means of screw 43 passing through bore 44 in part 39. A horizontally acting tool can then be used on the workng face of the bevel wheel 42. 7 It is only necessary to turn the bevel wheel when work on one tooth is finished until the next tooth is in the proper position. Part 39 can be swung so far that it stands vertically to the surface of table '34. Spur wheels can then be fastened to it and worked on by horizontally acting tools. Spur wheels can also be worked on by placing them on a shaft and fastening the shaft on table 34 as illustrated with shaft 35 in Figure 4. v

Besides the examples described and illustrated the attachment can be used in many other ways should circumstances demand it. I would state in conclusion that while the illustrated examples constitute a practical embodiment of my invention, I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can be slide horizontally adjustable on said first 7 Slide andhaving means for holding tools and work-pieces. Y

2. In a lathe, the combination of a lathe carriage having a base whereon a lathe attachment may be mounted, withan attachment consisting of a vertical guide piece having a base plate or socle adapted for being placed on and secured to the base of the lathe carriage, a slide vertically adjustable oncthe guide. piece, a nut upon said slide, a ratchet key turning a threaded spindle revolvably fastenedto the base plate or socle ofthe vertical guide piece and having threaded en gagement with said nut 1n the vertical slide and a second slide above said first slide hori zontally adjustable on said first slide. f'

In testimony whereof I afiix my signature.

AUGUST FRIEDRICH GRONWALD.

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