US1426496A - Center-drain turntable - Google Patents

Description

H. M." NORRIS. CENTER DRAIN TURNTABLE.

APPLICATION FILED APR- 2, 192K.

HENRY IVI. nonnrs, or cnvcrnnarrenro, assrenon TO THE CINCINNATI BICKFORD TOOL COIVIPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

CENTER-DRAIN TUR TABLE.

nazeaee.

T0 aZZ whom it may concern:

Be it known that I, HENRY M. Nonnrs, a citizen of the United States, and residing at Cincinnati in the county of Hamilton and State of Improved Center- Drain Turntable, of which the followingspecilication is a full disclosure.

This invention relates to work-tables, notably-for upright drills, and it deals more especially with an arrangement for disposing of either the cooling or abrading fluids used in certain machining operations; together with the small metal-chips resulting from the drilling operation and which ordinarily accumulate on the table and especially in the recesses thereof. In its more restricted aspect, the invention comprehends an arrangement of channels for conducting these fluid-and-chip aggregates to a common point (on, in or through the table), preferably 10 cated over and leading through one of the table-supporting members. l I 7 -A type of drill table, which admirably lends itself to alteration to conform with this invention, is the conventional rotarytable having the usual radial T-slots for receiving the work-clamping bolts. In this type of table, however, the T-slots are barely of'sullicient depth to receive th ebolt-heads, and they terminate short of any bore that may have been provided in the hub. The

hub, in this type of table, is generally located at the center of the table and inmost cases iscast hollow to receive the drill. The present invention, through certain alter-a tions, utilizes these characteristics 'of conventionaltables in fulfilling a major part of the requirements of a drain-system; thereby creating a work-table having a highly ellioient drain-system but without increasingits constructional CllffiCLlllJlQS to any appreciable extent, as comparedwith' cost of the usual rotary-table.

In applying this invention to conventional tables, the normal depth of the T-slotL-s is increased so that, in addition to serving their normal purpose of accommodating the heads of the clamping-bolts, they will also func} tion freely as conducting-channels ample to convey the aggregates to a suitable point of deposit. In order that these collected fluids may be disposed of, the channels are arranged freely to communicate directly with the axial opening often provided 111 the hub Specification of Letters Patent. Pafggnted Application filed April 2,

Ohio, have invented a new and 1921. Serial No, ember or, if such opening be not present. a drainopenlng 1s especiallyprepared. The communication between'th'e T-lslots and thebore of'thehub may be established by increasing the length of the T-slots so that, at the Penter of the table they open into the vertical bore, or smallauxiliary channels might communicate with theT-channels and the drainpassage. The fluid, which is delivered onto the table, passes through the .T-slots to a common point and is discharged intothis' opening in the hub.

Irrespective of whether the fluids are conducted to a common point by the usual T- slots or by auxiliary channels, an arrange ment for disposing of the fluids collected at this point forms an important phase of thepresentinvention; This disposition of the rather copiousquantities offluid ordinarily used in machining operationshas always presented a dllicultproblem. In some instances, the disposal has been arranged for by drain-holes arranged at one" corner in the bottom of the table; the outlet being screened to catch the chips. This. custom has, however, been attended with more or less inconvenience; because of the diliiculty in causing the fluids to flow to this single Aug. 2 2, 1922.

opening, and because of an interference with the free-flow of fluid caused by a clogging of the screen by the chips. The ordinary corner drain-hole is also objectionable because but two alternativesfor the disposal of fluids present themselves either the fluid is-allowed to drip. onto. the floor or onto the base ofthe machine (depending on the type of machine with which thetable .is'usedyor it'mustbe conducted away by a conduit connected to the opening. Either method of disposing of thefiuids is'inherently objectionable; the dripping-method, because/of the loss of the oiland danger to the operators caused by slippery 'floor's, and the con duit-method, because the table is prevented from. rotating freely and completely.

The present invention is therefore particularly applicable to the rotating type of drill-table.; since this form of table lends, itself peculiarly to the discharge of the oil at the center of the table (thereby obviating either the objectionable drip or conduitconnection) and also becausethe usual radiating T-slots of this type of table" may be conveniently altered so as also to serve as chan nels for conducting the fluids to the center of the table. The present invention, in its preferred form, also involves a channel encircling the tableand arranged subjacent to the outer'ends or" the T-slots; thereby prowork to the table.

viding an arrangement for collecting the fluid-chip aggregates which spill from the portions of the table between the T-slots. Ordinarily, and in the specific embodiment of the invention shown in the drawings, these intervening portions lie in a single plane. It is to be understood, however, that the table might be cast with inclined portions between the T-slots so. as to facilitate the shedding 01" thezfiuidi mixtures into the encircling'cha'nnel and still leave ridged portions directly adjacent to the channels to provide level radial ridges for affording the necessary' level support. for the work.

fln the drawing, Fig. 1, is a plan view of the invention; Fig. 2 is a side elevation partly insection; Fig. 3 is a section of Fig. 1 on the line 33 and Fig. 1 is a section of Fig. 1 on the line lt.

Continuing now by way or a more detailed description, A denotes the platen or drill-table proper and B denotes the standard for supporting or positioning the table. in this instance, this standard is represented as tubular in form; it being utilized as a'hub journaled in a conventional bracket (not shown) extending radially from the column of a drilling-machine in the usual manner, as will be understood. The bore of this hub, indicated by 1, extends vertically and may, if desired, open through the top ofthe platen so as to receive the drill and permit some of the chips therefrom to drop downwardly therethrough. In this instance, .a closed platen portionS is located in vertical registrywith the bore 1. Near its upper end, the bore 1 flares .upwardly and outwardly, as indicated by 2, and is preferably enlarged to form the drain-chamber 4 which may be, between the radial ribs 11, extended radially to the annular wall 9 which provides a reinforcement and support for the horizontal wall 8 of the platen proper. A flange 14L depends fromthe outer margin ofthe platen and, adjacent this flange, is a moat 13 circumscribing or extending around near the periphery oi the table; the wall 12 constituting the inner annular wall of the moat.

Channel-like ribs .11 are cast integrally with the other parts of thetable and hori- Zontally, .or nearly so, extend radially through or into connection with the annular wall 9; these ribs Jbeing channeled as shown by Fig. 4 in the form of a T-slot providing an enlarged conduit 5 of materially greater depth than the head of a bolt C such as is conventionally used for clamping The shank of this bolt isaccommodated by means ofthe slot 6 as Having thus revealed this invention, I

claim as new and desire to secure the i01 lowing combinations of elements, .or equivalents thereof, by Letters Patent of the United States I 1. A work-table comprehending individual. drain-passages having the shape of con ventional T-slots and converging toward-a common point; and a single downward (:lrain-passage located at said point, said drain-passage being enlarged at its upper end to communicate with the inner ends of said drain-passages and into which theymay discharge the fluids.

2. A work-table comprehendinga series of radial drain-passages 5 converging toward a common point and a single vertical discharge passage 1 at this point with, which the inner ends of said passages communi cate, said drainepassages comprising narrow slots 6 for receiving the shanks of bolts and said slots 6 terminatin at Joints. 7:

located concentrically to the central axis oi the vertical drain passage.

3.1-1 work-table comprehending an encircling channel and subjacentinwardly-extending radiating drain-passages c0mmunicating at their outer ends wit-h said chan-. nel and communicating at thelr inner ends with adischarge opening centrally located in the table, said drain-passages being open to receive fluid throughout the greater portion ottheir lengths from the top surface of said table and being T-shaped to alsov receive work-retaining bolts.

1-. A rotary work-table comprehending a hub and a platen having an encirclingchannel; subjacent inwardly-extending. radiating drain-passages communicating at their outer ends with saidchannel to receive fluidtherefrom and having their inner ends communicating directly with a central drainpassage provided by said hub; the radiating drain-passages being adapted to receive the heads of bolts for clamping the work.

5. A drill-table comprehending a horizontal top wall 8 having its under-side pro videdwith an annular table-supporting wall 2 spaced from the top-wall to form an enclosed central drain-chamber 4L; the underside of said table being alsoprovided with a number 01"" channele :lribs extending to an annular wall 9 having openings communicating with the channels provided by said ribs; and a tubular hub B integrally depending from said annular Wall 2 and adapted to serve as a drain for said chamber.

6. A drill-table comprehending a horizontal Wall bordered by a moat; the underface of said Wall being integral with the funnel-like upper end of a tubular hub like support; and a plurality ofopen conduits establishing communication between the said moat and the funnel-like upper end of said support, said open conduits having the shape of conventional bolt-retaining T-slots.

In Witness whereof, I hereunto subscribe 15 my name, as attested by thetwo subscribing Witnesses.

H. M. NORRIS.

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