US1420321A - Box table - Google Patents

Description

D. C. KLAUSMEYERL Box TABLE.

I T I I APPLICA ION FILED MAII I2 1921 20, y .n 2 SHEETS-SHEETYI.. :Er/gl' 4.

lWITN ESS ATTORN EY D. .0. AKLAusn/IEY'ERl Box TABLE.

i APPLICATION -FILED MAR. IVZ, 1921. 20,

2 SHEETS-SHEET 2.

WITNESS "WENT R d www: WM

www@ A ATTORN EY TXT DAVID C. KLAUSMEYER, or CINCINNATI, `;OIIfrol essioivon To THE CINCINNATI BICKFORD TOOL COMPANY, or OAKLEY, CINCINNATI, OHIO,A CORPORATION or OHIO.

BOX TABLE.

specificationpf Letters Patent. 'Patented June 20, 1922 Application inea lMarch 12, i921, serial No. 451,872.

To all whom t may concern."

Be it known that I, DAVIDC. KLAUS- MEYER, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved BOX Table, of which the following specification is a full diS- closure. v Y

This invention is concerned with the structure of cast-metal work-supports of the sO-called box-table type and it-proposes a formation Contributing towards greater economies and superior products in the manufacture thereof.

The routine production of satisfactory box-tables of the conventional formationj is attended with noteworthy losses by reason of the diliiculties encountered in obtaining a reasonably homogeneous casting, free from blow-holes, pockets, or dirty metal. In the ing lighter than the metal, tend to rise upwardly through the molten metal and flow towards and accumulate in the uppermost portions of such molten metal, and appropriate provision is made in foundry-practice to take care of such uppermost collections of dross-metal. Y

BOX-tables have, in accordance with conventional practice, long been made with a hollow workingssurface of greater area than the horizontal section of the column-like base which is cast integrally therewith. The

working-surface, therefore, habitually eX- tends cornice-like beyond the base-area, and Often is provided with an apron depending from one or all of the four outermost edges of the rectangular work-supporting surface.

The surface of the horizontal work-'supporting surface, as well as that ofthe exposed vertical face of the apron, is provided with a series of suitable l'slots for use in clamping the blank in place.

rlhe various walls and webs of such prior box-tables were provided with ribs on theirunexposed vfaces and the walls and webs were arranged in different ways in the interior ofthe structure, and reinforced also in various ways, but with the result that and quently,

the structures were not entirely compatible with conditionsV appropriate for an efficient effective casting-operation.

the

Conse- 1 aws would frequently de-velop innished product, thereby making it necessary to discard numbers of the castings ;y sometimes even after they had vbeen more or less machined:

The objective of this invention is to eliminate the abovefrnentioned defects and losses byV rendering available a boX-table inte-v 'riorly-so' arranged structurally as to prohibit the pooketing of dross or gases during lthe casting-operation while, at the same time, attaining a work-support of great rigidity presenting horizontal and vertical clamping-surfaces conveniently related and arranged," all without involving an undue amount of metal and without resorting to involved patterns and cores or necessitating Iirksome internal reinforcements.

"'- Theinature of aistructure. typically em- `bodying this invention may be best grasped by referring to the accompanying drawings, which f casting operation, the dross and gases, be-

Fig. l shows a vertical section of the table,

vthe tableV beingv shown in perspectivepart :is a side elevation, and Fig. 8 is a section lof Fig. 7 4onlthe line -8-8.

Referring toV Sheet l ofI the drawings, it

willbe seen that this boX-table comprehends-v a top-wall E which, in general, is relatively Ithinand'whioh is 4interiorly corrugated, as

indicated at F ,.to provide for suitable T- kslots Gr-suiiky in the 4surface C of the topplate'n; said ribs running` longitudinally. At its one longitudinal edge, it will be noted that 'this top-wall extends downwardly, as

indicated by U, more or less according to lconventional practise in drill-tables, (being corrugated-likeV the-top-wall) and that, at its lowermost longitudinal edge, it is deflected inwardly andV then continued downwardly as aside-wallA of the box-like `hollow 'column which `serves as a base, proper-,for fthe-table. Thesupercial vertical face of 'the upper portion,` of this wall is provided with T-slots G, andffinished to form a vertical platen D.- .At the aforesaid 'point ofv inward deflection, it is to be noted that there lare no interior right-angled corners but that the inner surface follows the contour of a gentleV slope such as the ogee curve indicated by H. This not only provides a junction of greater strength than a right-angled corner but it also serves the important purpose of avoiding the formation of casting defects at this point by permitting the dross and gases in the Huid metal to flow upwardly as indicated by arrow J; the table being cast when in inverted position.

The upper horizontal wall E also is deflected downwardly at the opposite edge of the top-platen, as indicated at K, so as to produce the side face L which depends vertically for a short distance and then is deflected inwardly and downwardly to form the slope M and it thereafter continuesy in a vertical direction tok form the other sidewall N of the hollow columnar base. It is to be noted that the depending wall LL is devoid of any flange-like form or any thin blade-like edge at the point() and that there is no external channel or moat between the wall L and the wall N, and that the wall Nv does not extend upwardly to connect with the top wall E independently and spaced away from the wall L, and that accordingly the construction differs materially from formations heretofore devised. In consequence of the instant arrangement, there is no tendency for the wall L or its lowermost portion V0 to be formed of spongy metal, since the dross and gases, during the casting operation will be afforded an easy avenue of escape in the path indicated by the arrow P; thereby avoiding, as a result of the absence of culs-desac, the defective castings and at the same time avoiding the depending flange' which, being free of marginal supports, were objectionable on account of their lack 0f ,strength and accordingly not infrequently became' broken away in places during the usageY of the kmachine-tool.

Each end of the wall of the top-platen, as shown best by Figs. 2 and 3, likewise turns downwardly and extends vertically; the vertical face' being L-shaped and being bounded by the line of deflection O--R--S This end-wallv is integral both with the end is noteworthy that, as in the instances above described, this formation also avoids anges- 0.1 @I ldfwalls having protruding or unsupported edges and likewise ensures homogeneous metal in these regions inasmuch as the dross and gases may freely riseY and escape past the points l2, 13 and 14, along the ogee or inclined paths indicated by the arrows a and e, in Figs. 2 and 4 respectively. The end wall 1l extends to the side walls A and Nv and integrally connects therewith; the small horizontal area F being if desired closed by a web which may be sloped if desired. The other end, being of similar formation, need not be described.

For the sake of avoiding the use of unnecessary metal, the' base may provide the end-openings 1 and 2 and the Hoor-opening 3, and it may be provided with the lateral foot-flanges B having bolt-slots 5 and V6 for the purpose of securing the box-table tol the bed of the machine tool. An internal rib 7 may be provided in the medial plane of the box-table for purposes of reinforcement and any aperture C may be provided through the top-wall E to admit the passage of the drill in certain classes of work.

In the renement shown by Sheet 2, the deflections are effected in such a manner as to provide'a narrow fiat surface m--m along the under-margins ofthe side-wall L and likewise, as indicated by r-s, as toV the end-wall T. This formation is of advantage in providing'a ledge affording a secure seat for one leg of a clamp when it is desired to hold the work on the topplaten by means of suitable screw-clamps. This parallelism is not, however, continued more than a short distance towards the column, but between the points o and n and s and a', respectively, the web is deflected downwardly and inwardly in a manner similar to that already described with respect to Sheet l.

This modified contour again eliminates the objectional casting defects by providing a natural and ready escape for the dross and gases during the casting operation; the narrow flat wall provided for clamping purposes being in the path of flow and not providing a suiiicient surface for the deposit of appreciable amounts of dross. Likewise, the side-lateral vertical wall 14 is similarly contoured as shown by Fig. 8.

It will therefore be seen that this invention provides an integral one-piece boxtable of superior strength and rigidity and of a shell-like formation avoiding depending marginal flanges or counterparts of mould culs-de-sac and hence admitting of being readily cast by means of comparatively simple cores and moulds inV a manner avoiding the local formation of spongy metal. Such patterns, cores and moulds being substantially counterparts or complements of the invention herein revealed, are toibe regarded as coordinate therewith.

I therefore claim as new and desire to secure by Letters Patent the structural characteristics as follows i l. A one-piece shell-like box-table comprehending a hollow rectangular column having its four walls extending upwardly substantially in parallelism and then each diverging outwardly and upwardly and then again extending for a short distance in parallelism to meet a horizontal flat wall integral therewith serving as a top-platen; the interior surfaces of said box-table being free from culs-de-sac and contoured to lead continuously downwardly.

2. A box-table consisting of al shell-like column surmounted by a flat top-platen extended longitudinally to form closed eaves; the side-wall of the column extending upwardly and being deflected outwardly at a region somewhat below the top-platen and then continuing upwardly into integral union with the top-platen to form the outermost side-wall of one of the longitudinal eaves.

3. A work-support for machine-tools consisting of a hollow column surmounted by a box-like platen extended laterally and longi-4 tudinally to form enclosed hollow eaves, the side-wall of one of said eaves being longitudinally corrugated interiorly to provide external longitudinal T-slots, said side-wall being deflected in an ogee curve to integrally meet the adjacent wall of the column.

4. A one-piece table for machine-tools comprising a hollow column and an elongated fiat top-wall extending horizontally beyond the base area of said column, said top-wall being deflected downwardly at its end-edges and then inwardly to form enclosed end-eaves the under-wall of which integrally joins the adjacent wall of the v column.

5. A one-piece work-support for machinetools consisting of an elongated top-wall integrally downturned along its opposite longitudinal edges, one of the resultant sidewalls extending vertically for a greater distance than the other and being corrugated interiorly to accommodate external T-slots, each of said longitudinal side-walls being at their lowermost portions deflected inwardly and then vertically downwardly to form the adjacent wall-portions of a hollow column.

6. A one-piece shell-like box-table comprehending a hollow rect-angular column having its four walls extending upwardly substantially in parallelism and then each diverging outwardly and upwardly and horizontally for a short distance to form a clampseat and then again extending upwardly for a short distance in parallelism to meet a wardly. f 65 7. box-table consist-ing of a shell-like kcolumn surmounted by a top-platen extended longitudinally to form closed eaves; the side-wall ofthe column extending upwardly and being deflected outwardly and for a short distance horizontally at a region somewhat below the top-platen to form a clamp seat and then continuing upwardly into integral union with the top-platen to form the outermost side-wall of one of the longitudinal eaves.

8. A work-support for machine-tools consisting of a hollow column surmounted by a box-like platen extended laterally and longitudinally to form enclosed hollow eaves, the side-wall of one of said eaves being interiorly provided with a vertical rib and also being longitudinally corrugated interiorly to provide for external longitudinal T-slots, said side-wall being deflected inwardly for a short distance to integrally meet the adjacent upright wall of the column.

9. A one-piece table for machine-tools comprising a hollow column and an elongated top-wall extending horizontally beyond the base area of said column, said top-wall being deflected downwardly at its end-edges and then for a distance horizontally inwardly to form enclosed end-eaves the underwall of which integrally joins the adjacent wall of the column and provides a horizontal marginal area serving as a seat for a screwclamp.

10. A one-piece work-support Jfor machinetools consisting of an elongated top-wall 10.0 integrally downturned along its opposite longitudinal edges, one of the resultant sidewalls extending vertically for a greater distance than the other and being corrugated interiorly to accommodate external T-slots, the shorter longitudinal wall being horizontally inturned at its lower edge to form a *clamp-seat, each of said longitudinal sidewalls being at their lowermost portions deflected inwardly and then vertically d'own- 110 wardly to form the adjacent wall-portions of a hollow column.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses. f

C. C. SLETE, ANNA M. I-IUssIAN.

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