US1297690A

US1297690A - Automatic feed for lathes.

Info

Publication number: US1297690A
Application number: US22458718A
Authority: US
Inventors: Samuel Hough
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-03-25
Filing date: 1918-03-25
Publication date: 1919-03-18
Anticipated expiration: 1936-03-18

Description

S. HOUGH.

AUTOMATIC FEED FOR LATHES.

APPLICATlON FILED MAR- 25. I9 l8.

Patented Mar. 18, 1919.

' 2 SHEETS-SHEET 1.

3 h 2w bu. N n \n .Om mq R 2 Q MLQ a A TTORNE Y.

AUTOMATIC FEED FOR LATHES.

APPLICATION F-ILED MAR. 25, 1913.

Patnted Mar. 18,1919.

2 SHEETSSHEET 2.

INVENTOR.

v y mm ATTORNEY -CItlZQ III of the United States, residing at Atco, in the countyof Camden and State of New Jersey, have inventednew and usep To'aZZ whom it may concern:

V SAMUEL Hone-H; or :ATCO, new JERSEY;

AUTOMATIC FEED Fort LA'IH'ES.

Be it, known that I SAM EL HOUGH, a

ful Improvements in Automatic Feed for Lathes, of which the following is a specification.

My invention relates to new and useful improvements in automatic feed for lathes, and has for its object to provide in a device of this character means whereby the power for driving the boring bar forward may be greatly increased particularly for use in boring steel billets such as used in the manufacture of shells or projectiles. r

.- Another object ofthe invention is toprovide a split feed nut of unique construction inclosed in ahousinghaving means to open and close said feednut, said housing being pivoted or journaled in a suitable bifurcated bracket whereby the rotation of the housing will open or closesaid feed nut.

"A further object of the invention is to provide a split feed nut operating upon a boring bar, the former being opened and closed by the rotation of its housing and spring actuated means to quickly rotate the housing in one direction forropening said feed nut, said means being normally held in an inoperative position by a latch which is withdrawn from engagement with said means at a predetermined time by an adjustable dog on the feed bar.

A still further object of the invention is to provide a boring bar bearing in a device 7 of this character which will eliminate all undue'lateral movement and positively hold the boring bar in central alinement with the chuck, saidbearing consisting of an integral rectangular bearing surface or section on the boring bar and a box in which said section slides snugly fitting said section.

With these ends in view; this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims. j

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail referring by numerals to the accompanying drawings forming a part of this application, in which Figure 1, is a side elevation of myaui-tos Specification of Letters Patent. 1 Patented Mar. 18, 1919.

Application filed March 25,1918. SeriaINo .2 24,587.

matic feed, portions thereof being broken;

, away and shown in section to clearly illustrate the invention it being shownapplied from the lathe with parts broken away. and

shown in section to illustrate the construet1on,and

Fig.3, is a Fig. 1.

section a the 11a d-Bot In carrying out my inventionas hereem- Y.

bodied2 represents a lathe bed or the frame [of a suitable machineto which my invention Lmay be applied and said lathe bed carries the'ordinary and well known shears 3 with -which registers the inverted V shaped grooves 4 in the under side of the base plates 5 and 6 which are adapted to be bolted to the bed plate in any ordinary and well known manner.

The base plate 6 carries two pedestals? and 8, which may be of any desirable shape, size or configuration and at the upper ends of these pedestals are located the journal boxes or bearings for the boring bar 9, the

latter end of which also runs through the.

tail stock of the lathe while the forward end of'said boring bar has an integral rectangular or squarebearing surface or section 10 of a length sligthly greater than the entire longitudinal movement of the boring bar,

and this rectangular bearing surface is slida-bly mounted in a suitable rectangular bearing or box located at the upper end of the pedestal 11 carried. by the base plate 5 and as the rectangular bearing section or surface 1O snugly fits its box, therecan be no lateral movement of the boring bar, so that when centered with relation to the lathe chuck the two must absolutely always remain in their relative centered positions thereby producing absolutely accurate work.

The rear portion of the boring bar is threaded as at 12 and coacting therewith are the two elements 13 and-14L of the split feed nut, each element of said feed nut having a pair of oppositely projecting lugs l5'which. L

register with and work in the inclined or angular slots 16 formed in the feed nut housing 17 which is provided witha ch a1n' ber 18 ofsuitable configuration to passover thethreaded portion ofthe boring bar and inclose the two elements of the feed nut; and said chamber is of sufficient sizetolpermit a certain amount ofmovement of theh'ous ing without interfering Withlthe other cos c operating parts. The angular grooves orslotsrl6 project outwardly from the vertical I si'tely and outwardly projected trunnions: 19

which are pivoted or journaled in the arms,

20 of the bifurcated bracket 21so that said housing may be rotated within the limits of 'theslots; '16 and'in order that saidhousrng may be 'ni'anually rotated,fone of thetruniiioii-s'proj'ects through and beyond the outer surface of one of the armsof the. bifurcated bracket a sentien distance to permit a suitab'lehairdle 22 to be mounted thereonand in i order that said housing be mtmam I chanicallyI form a projection 23 therewith which exteiids from its outer surfaceand its I I I I I II yOkeACS whereby suitablemeansmay be coni nected with the boring" bar orquickly sliding the same back'when id'eisiredor after an oputility will be hereinafter described.

The bifurcated bracket 21 is carried by theiw'orni gear 24 and at the end opposite said worm gear, said bracket is "rovided was a thrust head 25 against w the housing of the split feed nut may abut.

The Worm gear and bracket are journaled between the two pedestals 7 and 8 in any well" known and approved manner: as; by

thrust bearings and said Worm gear'isjdriven by. a worm 2e mounted upon a shaft 27 to which power motion are transmitted by some suitable means such as a beveled gear 28 carried by one end of saidshaft.

pedestal 8 is provided with an in tegral spring'l housing 29Qhaying one end closed as at 30 with a hole 31 therethrough while: the other end of the housing is open and has mounted therein auc ap 32 with a hole 3 3 therethrough in alin'ement with the hole 31. In these holes is sli'dably mountedthe radar, the inner end of which is beveled a's at' 35' so that when the projection23 strihesthis beveled end atter the rod has been moved inward, the feed nut housing will be rotated in one direction to separate the members of the feed nut whereby they will be disengaged 'frointhe threaded porof the boring bar;- a I The rod'34 has a" collar '36 or itsequival'ent located adjacent its inner end, said collar is located withiii the housing 29 and is engaged as the inoyable member by one end of'th'e coiled spring 37 which is also located within the housing and iscoile'd about the rod and the opposite end of said spring engages thecap 32 as the stationarymember. This rod 34 also has" a coll'a-r 3801' its equivalent located adjacent the outerend thereof and outside of the housing and is adapted to "be engaged b the. spring actuated latch 39 when'the rod 34 is Withdrawn against the action ot the spring 37 Whiclrinay be ac'conr plished by means of a suitable hand hold 40 at theouter end of said rod. I

The latch 39 is; slidably mounted in a suitable barrel 41 preferably formed as an integral part of the housing 29 and in the bore' o f-this-barrel i s-located a spring 42 engaging a collar 13 or its equivalent carried by the ilatclr'as amovable member and also engaging the outerend wall of the barrel as thestati nary member so that the latchis normally forced toward the rod 34. The in- I ner orlo'weir' end of the latch is rearwardly beveled as at 443 so that when the rod ,34: is drawn outward, sai'cl'latch willride'over justabl efdoghd ,wli-ichis' adjustably mounted -tq c1rtne'bcring"bar and is held in any suit ableadjustnient by any well known means f such as a set screw or bolt 1-7;

I The -bo ringj bar be 'srdvidea with a I elation u-as'been completed.

The enter; the baring bar adjacent or cutting h'ead' may be attached thereto and with the attachment, as here described, I prefer to use my improved adjustable cut "toward the lathe 'ehuclr iis'provid'ed with suitable means wner ty a boring. toolor ting head'fi9 which carries plurality of cutting tools and which is fully described in my application, Serial Number 190,708, filed September 11, 1917, when suchacut'tin'g head is used with this deyic'e,the plurality I oftoo'lsfafter entering the work will also act as a bearing for the gradually extending end ofthe' boring bar which will prevent'chatterii-rg'and' cause thawork to be finished accurately'which is] highly essential the 'inanufacture of munition' shells jGCtilSr, I i I V r I V V Wheii the worl'r has been placed in the V chuck ready to be bored or otherwiseffinished, the boring bar-9 is first moved back a suflicient' distance to permit the insertion of the work after'which themembers 13 and lfl o l" the feed nut are closed upon the threaded portion 12' of the boring'bar by rotating thehoufs'in'g 17 inthe' directionef A I the arrow A, Fig: 1" which will causethe ends-of the grooves or slots l dwh'i'ch are the greatest distance from: the longitudinal 1 center of the boring bar to be moved away from the Vertical 'cei 'iter'of the ,feed nut when constructed as showiiin Fig. 1 thereby acting ascains upon the lugs 15 and thereby force thei'nenibei's of the split nut toward the boring bar and into engagement with the threads thereof. The rod army next be withdrawn or pulled outward against the actionof the spring'37 so astowithdraw thein'ne'ieii'dof said rod' outof the pathlot travel of the projection 23' and at thesame' 7 time compress thespring. This actiorr will cause the latch .39 to ride overthe 'c'ollari38 and thereby in behind the "same, thus holding the rod34 in a setposition as shown in Fig. 1. The dog 46 is then adjusted to the proper position for the depth of bore desired in the work or the distance whichit is desired that the boring bar shall travel, v

The power then being applied from some 7 suitable source through the beveled gear 28 ing 17 and the elements 13 and 14: of the feed nut will feed the boring bar toward the chuck or Work holding device.

' At some point through the forward feedg of the boring bar, the dog .46 will engage the finger 45 of the latch 39 and draw said latch outward against the action of its spring 7 42 thus disengaged; the inner end of said latch from the collar 38 which will release the rod Siand permit it to be uickly forced inward and by its spring 3 which ,will' project the inner beveled end 35 of said rod into the path of travel of the projection 23 and as soon as said projection strikes the beveled inner end of the rod, it will be caused to ride on said beveled end and move in a direction opposite to the arrow A in Fig. 1 causing the housing 17 to rotate about its trimnions 19 so that the ends of the slots or grooves 16 farthest from the longitudinal center of the boring bar will be moved toward the vertical center of the feed nut when constructed as shown in Fig. 1 and this will force the members of the feed nut away from the boring bar so as to disengage said members from the threaded portion and stop the feeding of the boringbar.

Of course I do not wish to be limited to the exact details of construction as herein shown, as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention what I claim as new and patentable is 1. An automatic feed comprising pedestals, a boring bar having a threaded portion, slidably mounted in said pedestals, a.

worm gear revolving about the boring bar, a bracket carried by the worm gear, a housing rotatably journaled in said bracket, said housing having angular or inclined slots, a split feed nut withinthe housing adapted to engage the threaded portion of the boring bar, lugs carried by the parts of the feed nut registering with the slots and means for rotating the housing to open or close the feed nut.

2. An automatic feed comprising pedestals, a boring bar having a threaded portion, slidably mounted in said pedestals, a worm gear revolving about the boring bar, a

ing bar,

bracket carried by the worm gear, a'housing rotatably ournaled 1n said bracket, said housing having angular or inclined slots, a

split-feed nut within the housing adapted to engage the threaded. portion of the boring bar, lugs carried by the parts ofthe feed nut registering with theslots, means for rotating the housing in one direction to close the feednut, a projection extending from the housing and sprin actuated means adapted tobe moved into the path of travel of the projection whereby, the housing will be rotated in the opposite direction to open the feed nut. I V

'3. An automatic feed comprising pedestals, a boring bar having a threaded portion,

slidably mounted in said pedestals, a worm gear revolving about theboring, bar, a bracket carried by the Worm gear, a housing rotatably journaledin said bracket, said housing having angular or inclined slots, a split feed ,nut within thehousing adapted to engage the threaded portion of the borlugs carried by the, parts ofthefeed nut registering with the slots, means for rotating the housing in one directionto close the feed nut, a projection extending from the housing, a spring actuated means for normally holding the first named spring actuated means withdrawn or in a set position and an adjustable dog carried by the boring bar to operate the last named spring actuated means when the boring bar has traveled a predetermined distance.

4. An automatic feed comprising a threaded boring bar, a gear journaled to revolve about the boring bar, a bracket carried by the gear, a feed nut housing rotatably jour naled in the bracket and revolving therewith, said housing having inclined slots and a two part feed nut coacting with the threaded portion of the boring bar, each part of said feed nut carrying means registering with the inclined slots whereby the rotation of the rotation of the housing will move the feed nut parts toward or away from the boring bar.

5. An automatic feed comprising a threaded boring bar, a two part feed nut coacting therewith, each part having lugs projecting therefrom, a housing in which the feed nut is mounted, said housing having means for engagement with the lugs whereby the ro tation of the housing will open or close the feed nut and trunnions projecting from the housing for rotatably mounting the housing in a suitable supporting means.

6. An automatic feed comprising a threaded boring bar, a two part feed nut coacting therewith, each part having lugs projecting therefrom, a housing in which the feed nut is mounted, said housing having means for engagement with the lugs whereby the rotation of the housing will open or close the feed nut, trunnions projecting from the housing,- abracket revolving about the bor- 111 bar i11 Whioh the hou'slng is rotatably 'joufnal'ed by mesins of itst 'linnion's, means on one "of the trunniohs for rotating the ,housingin one direction" zthdmetfis' for 'rotatifi-g it in the opposite direction.

7. In a1 boring bai'feed, a; boring bar, a split feed nut; 'a rotatable feed nuthousing provided with means coacting With suitable means onthe feed -nut whereby the latter may be opelied and closed, a projection on said'fee'd nut housing, a spring housing open 'at one end and closed at the other, said closed 7 end having a hole therethrough, a cap pro- Vided with a hole, mounted in the Open end, a bet slidably' mounted in said holes, the inner end of said ball being beveled and adapted to meet with the projection for rotating the feed nut housing in one direction, the outer, end of said bar having'a haind hold, a collar on the bar-located within the spring hohsin'g', a spring en aging said 001- co'pias' in this patent ma? be attained fbr:

dfaWr'I,- as spiing WithiIi the batrrel for nor- 7 many; foicing the latch toward the bat, a finger on the hitch ,aind an adjustable dog on the boring bar adalpted to engage the finger When the boring'btr has traveled a predetermined distahce to Withdraw the V latch fronii engagement With theb'a'r and permit the action of thespring to the ban into the- 'path' of travel of the projection oh the housing;

Iii testimony whereof, Ihax e hereunto 7 affi'xed sign ture;

SAMUEL HOUGH'.