US2511930A - Steady best for lathes - Google Patents

Description

June 20, 1950 w MARTENS 2,511,930

STEADY REST. FOR LATHES Filed Dec. 21, 1945 2 Sheets-Sheet 1 REF-1' ,1: INVENTOR.

WA LDEMAR CHESTER MARTENS June 20, 1950 w. c. MARTENS 2,511,930

' s'rEADY REST FOR LATHES Filed Dec. 21, 1945 I 2 Sheets-Sheet 2 I50 nvmvrox I I WALDEMAR CHESTER MARTENS wwiza Patented June 2Q, 1950 um-TED;

STEADY REST oRLA'rH s- Ii I I Waldemar Chester Marteriajstantonlljell Application December 21, 194 ySerlal No. 636,423

.-;. This invention relates to lathes, and more particularly to suchadevice for supporting and steadying work operated upon -by a lathe or similar tool.

A primary object of the invention is the pro- 'vision of an improved steady rest for lathes characterized by extreme adaptability and relative freedom from friction in rotation. at I -A further object of-the invention resides in the provision of an improved chuck for'such a rest characterized by -a plurality of jaws," certain of which are universally movable for quick setting of the device, and others of which are individually movable for extremely accurate work I,

I? -A- further object of the invention resides in theprovision of an individually movable'jaw in the chuck of the device, whereby off-center work ma be readily turned.

Still another object of the invention the provision of an improved tool of the character tobe hereinafter described which may be readily 1 cairn. (cllsg ssr j a steadyrest for 2 adapted for turning cams or similar work, or

which may be utilized for the steadying and holding of straight turned work. .Aiurther object of .the invention is the provision of such a device which may be equally advantageously utilized onsquare stock or the like for holding the same steady and without vibration. r Other objects reside in the'combinationsmf elements, arrangements of parts, and features of construction, all as will be more fully pointed ,out hereinafter and disclosed in the accompany- Iing drawings, whereinthere' is shown a preferred embodiment of this inventive concept. In'the drawingsz' r r Figure 1 is a side view, partially in elevation, and partially in'section, showing the main head or housing of the device, the chuck being indicated in dotted lines, 'and'certain associated portions of the la'thebed also being indicated in dotted lines.

Figure 2 is a front elevational view of the housing of Figure 1, thephuck being removed, and certain concealed portions thereof being, indicated indotted lines.

Figure 3 is a front elevational view of the chuck adapted to be associated with the housing.

Figure 4 is a side elevational view of the device shown in Figure 3.

Figure 5 is an enlarged fragmentary sectional view disclosing the operation of certain individually movable jaws on the chuck of Figure 3.

Figure 6 is a fragmentary enlarged sectional view-rdisclosing thevmechanism for the simultaneousor-universal movement of certain of the other-jaws ofthe mechanism of Figure 3. V

: Similar reference. characters refer to simila parts throughout the h several views of the drawings .1 A Referring now tothedrawings, and more par- :ticularly to Figures-1 and 2, there is generally indicated at ID a main frame or housing for the steadying device. The frame includes a-flat base portion l l provided with recesses l2 in the rear thereof to accommodate nuts I3 securing bolts 14- provided with "enlarged heads or lugs l5 "adapted-to hold thehousing on'a lathe bed or way IS. The housing -ll] has positioned centrally thereof a circular aperture within which is mounted for rotation a spindle I'lincluding a tapered flangeportion [8 at the rear thereof adapted to engage roller bearings I!) which are journaled ona bearing ring 20 positioned in a suitable flange interiorly-of the housing. A- sec- 'ondbearing ring 20 is also positioned in an appropriate groove and carries roller bearings 2-2 adapted to coact with a bearing ring 23 surround ing the forward-portion of the member ll. "An apertured bearing retaining plate 25is provided at the rear face-ofthe device and has 'interiorly positione d thereof-a flange 26 coacting jwith-an appropriate groove 21 in the rear of member ilk-which serves as a grease-retaining ring-,'-grease being adapted to be introduced to the device through a conventional grease cup-28. The plate ZE isapertured, at suitably spaced intervals, and is secured to the housing 10, as by.

means of'screws'zll. A' front bearing-retaining plate 30 is'al'sd providedand is secured, as by means of screws 3!, to the front ofthe device,

fitting in a suitablerecess-in the face ofthe In the upper'portion of the device a tapered hole 32 is provided adapted to accommodate a centering'pin'. The lower portion of the housing in ha's'pr'ojecting forwardly therefrom a flange "33 channeled, a'sat 34, to accommodate for rotation'therein a 'portion of a chuck generally indi cated at 35, and to-be more fully described hereinafter. 'Iheforward' portionbf the member I1 extends outwardly of the housing ID and is provided with a chamfered forwardly extending portion 36 positioned around which are a plurality of pins 31 adapted to engage appropriate apertures in the chuck 35 for securing the same to the member H for rotation therewith. It is to be understood that the work spindle carrying the tool or work 3 is adapted to extend through the centrally positioned aperture 38 (see Fig. 2) extending through the spindle I1.

Referring now to the chuck 35, as best shown in Figures 3 to 6, inclusive, it will be seen that the same comprises an annular body 39 provided with a centrally positioned aperture 40, and as best shown in Figures 5 and 6, the rear portion of the aperture 40 is tapered or beveled, as at 4|, to engage thecorresponding taperbf the portion 36 of the spindle l1. As best shownin Figure 6, one of the apertures 42 for the accommodation of the pins 37 is also disclosed.

Positioned radially about the aperture'40 area plurality of jaws 43 comprising one set, the jaws of which are substantially equally spaced'angularly around the chuck and interposed between i.

which are a plurality of additional jaws 44 of a diiferent type constituting a second set, the "jaws of which are substantially equally spaced from each-other and from the vjaws of ithefirst set.

The -jaws 43 are adapted to 'bemoved simultaneously, in a manner to be hereinafter de- 'scribed,:for the quick setting :upof the apparatus and the work contained therein, while the .jaws

44 are adapted to be moved and set individually for extremely accurate workyorfor the position- :ingof a tool or piece of work off-center of the *device.

:outer surface, as indicated at '47, and having :helical ridges 42 on itsinner side engagingcorrersponding teeth 48 carried .by-the rear surfaceof reach of the jaws 43. It is tobe noted that the .jaws 43 are radially movable in appropriate slots -49-cut into the face of the chuck. The .disc 41 isadapted to rotate ona ring 50:.carrying bear- .ings 5|, and is held in position .by aback plate :52 and a retaining ring 53 secured to the chuck, as-by means-ofa set screw. The rear face of the disc 46-is provided with .a ring gear-55 adapted to be engaged by a-pinion'56;mounted.onashaft 5.1 :supportedby a bracket 58 secured to the outer rim of the chuck, as bymeans of .a set screw.59. Ehe-upper'extremity of the shaft 5'l.-is squared,.as

indicated at '60, and extends into-an aperture .6!

extending through therim of the chuck. .It'will thus be seen that by means of an appropriate tool, the shaft 60 may be turned, which in turn rotates the disc 46, thus varying the relative position of all the jaws 43 simultaneously, in I order to hold the work in appropriate position within the aperture 40. g 7

Referring now to theindividually movable jaws 44, which are movable in radial slots 65 in the chuck face, it will .be seen that the rearsurface o'feachis provided with teeth forming-a rack filiadapted to be engaged by ascrew or worm 61 positioned in an appropriate recess.68 within the chuck body, and journaled for rotation on an axle 69. The upper portion of thescrew fil is provided with a squared extremity 10 which extends through a suitable aperture 1| adjacent each jaw, and it will thus be seenthat upon the application of an appropriate tool to the squared end 10, and rotation of the screws 61, that each jaw 44 may be individually moved to the extent desired.

Now, from the foregoing it will be seen that there is herein provided an improved steady rest for lathes or similar tools provided with a plurality of simultaneously movable jaws for the quick setting up of work, and correspondingly provided with a plurality of individually movable jaws by means of which work may be set offcenter if desired, or adjusted to extremely accurate tolerances, which accomplishes all the objects of this invention, and others, including many advantages of great practical utility and "commercial importance.

.As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to .be interpreted merely as -illustrative .and not in ialimiting sense.

, I claimz In a lathe steady rest,'a chuck support comprisingan annular housing having a fiat :bottom surface adapted to .rest upon a lathe bed, and having two annulargrooves disposed-one in-each end thereof, two beveled .bearing races disposed onein each groove and having-their bearing faces oppositely and outwardly inclined, a hollow, cylindrical spindle having an integral, beveled bearing raceon one end thereof journaled in-said housing, a I separate beveled bearing race on the opposite endof said spindle,-anti-.friction rollers between associated bearing races, and two annular bearing retaining :rings removably secured one toeachendof said housing and overlying the outer edges of the corresponding bearing races to retain said races and said spindle .in operative position in said housing, said spindle having a chamferedzannular portion'on one end thereof providing a mounting seat .for archuck, and :angularly-spaced pins projecting from said chamferedend of-said spindle to support a. chuck on said mounting .seat.

CHESTER MARTENS.

REFERENCES CITED The following references are of record in ,the file of this patent:

UNITED. STATES .PATENTS

Images