US1572476A - Rotary table for drilling machines - Google Patents

Description

2 Sheets-Sheet 1 -Jllllllllll'm R M GALLOWAY ET AL ROTARY TABLE FOR DRILLING MACHINES Filed Feb. 26, 192

Feb. 9 1926.

Feb. 9 1926. 1,572,476

' R. M. GALLOWAY El AL ROTARY TABLE FOR I DRILLING MACHINES Filed Feb. 26, 192: 2 Sheets-Sheet z V///////////////// ///////J///////////JIIIIIIII Patented Feb. 9, 1926.

UNITED STATES PAT ENT OFFICE.

ROBERT m. GALLowAY AND ALFRED G. SUDHOFF, or RIc 'TmoND, INDIANA, s- SIGNORS To THE NATIONAL AUTOMATIC ooLc0MrANY, or RICHMOND, INDIA A,

A CORPORATION 01 INDIANA.

ROTARY TABLE FOR DRILLING MACHINES.

Application filed February 26, 1923. Serial No. 621,163.

To all whom-it may concern:

Be it known that we, ROBERT M. GALLO- WAY and ALFRED G. SUDHoFr, citizens of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Tmprovements in Rotary Tables for Drilling Machines, of which the following 1s a spec:- fication.

Our, invention relates to rotary tables such as used with drilling machines,v an example of which may be seen in the atent granted February 8, 1921, No. 1,367 ,5 9, on an invention of William M. Ziegler and Alfred G. Sudhoif. There is a showing in this off 0 its seat or track and for indexing it, such means taking the form of two separate levers, one of them serving to lift the'table and the other to unlock it.

The main object of our present invention is to much simplify the table lifting and indexing mechanism and in carrying out this object we dispense with the necessity for two separateappliances such as the lovers just mentioned and provide for the lifting of the table and its unlocking by one and" the same act. Thus a single lever or treadle serves for both purposes and the operator has his hands that much freer for simultaneously performing other manipulations.

In the drawings which accompany and form part of this specification, Fig. 1 represents a topplan view of a table having our invention applied to it in one form, the top of the table and part of the base being broken away and some portions shown in horizontal section for the better portrayal of the invention; Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1; Fig. ,3 is another vertical section taken at right angles to Fig. 2 on the line 33 of Fig. 1; Fig. 4 is a view similar to Fig. 3 showing a some What different form of embodiment of the invention; Fig 5 is a fragmentary sectional plan view taken substantially on the line 55 of Fig. 4; Fig. 6 is a detached perspective view of the head of a latch for the indexing bolt employed in the construction illustrated by. Figs. 1 and 3; and Fig. 7 is a fragmentary elevation illustrating a further modification.

of the structure which is of skeleton form atent of means for raising the table and has at the center a bearing 3 receiving the journal stud 4. of the table 5/ The base has a track or seat 6 which encircles the central bearing and the table has a circular foot formation 7, to rest upon said. track or seat so that the table will be evenly and solidly supported when work is\on 1t and being operated upon. The journal stud 4 is slidable up and down in the bearing 3 so that thetable may be lifted off of its seat when it is to be rotated. For indexing purposes a series of sockets 8 are formed in the foot portion of the table and pref erably hushed, and the base is formed with a boss 9 with a bushing in which a bolt is vertically slidable for entrance into and withdrawal from these sockets.

The central journal stud 4 is recessed in its under-side for the accommodation of a single anti-friction ball 10 which seats in the similar recess of a hardened block '11 set in the short inner arm of a lever 12. The latter is pivoted at 13 in the base of the ap paratus and its longer arm extends outwardly and is coupled to an operating lever extending at right angles to it. Obviously depression of the long arm of this lever 12 will result in lifting the table upon the ball bearing so that the table will be free from i the track or seatand may be easily turned.

Thus far the construction is the same in both illustrated forms of embodiment of the invention. Referring now more particularly to Figs. 1 and 3,. the operating lever is designated 14, the same being pivoted at. its inner end'to the base, as shown at 15. This lever is coupled. to the table-lifting lever 12 adjacent the pivot 15 by a shackle bolt 16', the eye of which engages a cross in' in the. lever 14 and the shank of whic extends through the long arm of the lever 12 and receives a nut over a washer and bearing block, the latter of semispherical form and engaging a complemental'socket formed in the lever. The op- 4 erating lever 14 extends outwardly beyond the table where it hasa handle 15' and it will be obvious that by pressing down. on that handle the table may be lifted in the manner already mentioned. -The indexing bolt is designated by the numeral 17 and it' extends freely through an opening 17 in the lever 14. It-is bored out to receive a compression spring 18 which is confined in ing soc et of the table.

a suitable seat; 19 onthe base of the apparatus and which serves to thrust the bolt upwardl for engagement with the indexangular slots 20 are formed in opposite sides of this hollow bolt and the lever 14 carries a latch normally engaging the short horizontal upper portions of these slots so thatv when the lever 14 is depressed the bolt 17 will be carried down with it and so withdrawn from the table. socket. This latch comprises a head 21 and a stem 22 occupying a recessed under portion of the lever 14 is coupled at its outer end to a latch lever v 26 pivotally suspended from the outer portion of the operating lever 14.

Still referring to the 'form of construetion illustrated by Figs. 1, 3 and 6, when occasion arises for rotating the table asv for the proper positioning; or re-positioning of work upon 1t under t e drills of a drilling machine, the operator has merely to push down the outer end of the operating lever 14, thereby lifting the table in the manner already described and at the same time withdrawing the bolt 17 from the, table socket. Then with the same hand he will operate;the latch lever 26,-having started to turn the table with his other hand, and this working of the latch lever will draw the latch outwardly and bring its studs 24 in line with the vertical portions of the slots- 20 whereupon the spring 18, which was of course compressed when the bolt was forced down, will drive the bolt upwardly against the foot portion of the table ready tosprin'g into the next soeket'as soon as' the table has been turned the corresponding distance. Of course the studs 24 do not leave the slots 20. and thereforeas soon as the lever 14 is released and rises with the dropping of the table onto its seat these studs travel up the slots 20 and, the latch lever 26 having been released, spring 25 will throw the studs into the horizontal ortions of the slotsso that the normal con ition is restored. 5

Referring next to the further simplified construction illustrated by Figs. 4 and 5, the operating lever is designated by the numeral 30 and is coupled to the lever 12 in just the same Way as already described in connection with the other form of construction. The difference between the two constructions has to do with the relationship between the operating lever and the indexing bolt. The latter is here designated 31 and, unlike the bolt of the first described Corresponding the lever 30 may construction, it does not have vertical movement independently of the operating lever, but is permanently coupled to the latter 'so as to, move up and down with it.- To this end the bolt, where it extends through the in one side, and, a bolt 33 is run crosswise through the lever as best shown in Fig. 5 so as to occupy said notch, sufficient play beingfallowed for, to accommodate the arc of movement the lever. tion the bolt does not have a spring applied directly to it; its lower end simply slides in a boss formed on the bottom part of the base. Between the bolt and the pivot of the operating lever a spring-35 is directly applied to the lever, being received at .the

upper end in-a recess of the-lever and at the lower end in a recess on the base. This is a compression spring likethe spring 18 of the first described construction and it fume-- tions to keep the and indexingmec anism in proper normal s ate with the bolt in the table socket. Quite obviously a spring might be otherwise applied for the purpose, as e. g., by extending the same between the lever and the overhangin portion of the base in the manner shown y Fig. 7 wherein the spring is designated 35 and engages at one end in an eye-lug on the base and at the other end with a stud on an ear of the lever.

It will be seen that in the use of the last described form of embodiment of the invention depression of the outer end of the arts of the table lifting lever, is formed with a cross slot or notch 32 In this construe.-

operating lever 30 will lift the table off its table socket and that this will be done in opposition to the spring 35 but in this sim- Y plified construction there is no additional operation such as the workin of a latch. As soon as the'table is start in rotation be released and being moved upward by the weight of the table and alsothe expansion of the spring 35 will carr. with 1t.the bolt 31 so that the latter Wlll be ressin against the foot portion of the ta le re y to instantly enter the next socket therein. As soon as that.

occurs the table ain drops upon its seat.

Either .form 0 construction above described fulfills the object primarily stated and it is to be understood that the invention .may be embodied in still different-forms within the scope of claims which follow:

We claim:

1. The combination of a base, a table mountedto rotate over said base and to rest upon the same, means for holding tlie'table at different positions of rotation, means for lifting the table off its seat, and means for operating said lifting means with provisions for also releasing the table from its holding means by'operation of said lifting means.

2. The combination of a base, a table mounted to rotate over said base and to rest upon the same, and having a series of indexing sockets, a bolt for engaging the same to hold the table at different positions of rotation, means for lifting the table off its" seat, and means for operating said litting means with provisions for also withdrawing the bolt by operation of said litting means.

The combination of a base having a central bearing and an encircling track, a table having a journal stud occupying said bearing and a series of sockets over the base track, a bolt to engage said sockets, a lever extending under the table stud, and another.

lever engaging the first mentionedi one for operating the same to lift the table, said second' lever also engaging the bolt to withdraw it from the table-socket 4. The'combination of a base having a central bearing and an encircling track, a

table having a journal stud occupying said bearing and a series of sockets over the base track, a bolt mounted to slide vertically in.

the base and engage the sockets in the table, a lever permanently engaged with said bolt for moving it up and down, and connections for lifting the table simultaneously with retraction of the bolt.

5. The combination of a base having a central bearing and an encircling track, a table having a journal stud occupying said bearing and a series of sockets over the base track, a bolt mounted to slide vertically in the base and engage the sockets in the table, a lever permanently engaged with said bolt for moving it up and down, a spring applied to the lever, and connections for, lifting the table simultaneously with retraction of the bolt.

6. The combination of a base having a central bearing and an encircling track, a table having a journal stud occupying said bearing and a series of sockets over the base track, a bolt mounted to slide vertically in the base and engage the sockets in the table, alever pivoted beneath the table and extending under the latters j onrnal stud on one side of its pivot, 21 second lever extending at right angles to thefirst and coupled to the latter on the other side of its pivot, and apermanent connection between the bolt and the second lever on the same side of the latters pivot as the coupling between the two levers.

7; The combination of a base having a central bearing and an encircling track, a table having a journal stud occupying said bearing and a series of sockets over the base track, a bolt mounted to slide vertically in the base andengage the sockets in the table, a lever pivoted beneath the table and extending under the latters journal stud on one side of its pivot, a second lever extending at right angles to the first and coupled tothe latter on the other side of its pivot, a permanent connection between the bolt and the second lever on the same side of the latters pivot as the coupling between the two levers, and a compression spring below the second lever also on that same side of its pivot.

ROBERT M. GALLQVVAY. ALFRED G. SUDHOFF.

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