US1695419A - Supporting structure for power tables - Google Patents

Description

G. M. EAMES SUPPORTING STRUCTURE FOR POWER TABLES Dec. 18, 1928.

3 Sheets-Sheet 1 Filed March 19, 1926 INVENTOR Geolyefllamw BY 4 W ATTORNEY Dec. 18, 1928.

G. M. EAMES SUPPORTING STRUCTURE FOR POWER TABLES 3 Sheets-Sheet 2 Filed March 19, 1926 INVENTOR 62v illa mar T ORNEY Dec. 18, 1928.

e. M EAMES SUPPORTING STRUCTURE FOR POWER TABLES Filed March 19, 1926 5 Sh eets Sheet 3 INVENTOR (Zeaye/Zlbm 2% 1' ATTORNEY atented Dec. 18, 1928.

UNITE p Fl C E GEGRGE M. EAMES, F BRIDGEPORT, CGNNECTICUT, ASSIGNQR TO THE SINGER MANU- FACTURING COMPANY, JERSEY.

OF ELIZABETH, NEW JERSEY, A CORPORATION 0]!" NEW SUPPORTING STRUCTURE FOR PU'WER, TABLES.

Application filed March 19, 1926. Serial No. 95,848.

' tables particularly for sewing machines and the like, and has for its primary object to provide a supporting structure of this character which may be readily assembled or set up and when so assembled meets the requirements of various types of power-transmitters at present standard in commercial use, withal comprising a structure of relatively low cost of manufacture convenient of shipment.

In its preferred embodiment, the tablesupporting structure of the present invention comprises sheet-metal channel-bars which are substantially U-shaped in cross-section, and in its simplest form comprises table endrails each sustained by two spaced, vertically adjustable legs braced by a cross-bar. Thechannel-bars comprising the end-rails and the cross-bars are each, in cross-section, of inverted U-shape, while the channels of the legs of each rail face each other. Each end of a cross-bar fits snugly in the channel of a legmember and is so constructed as to obviate the use of additional webs or stay-pieces heretoforefound necessary to obtain the required rigidity in a detachable construction of this character. The legs each comprise relatively adjustable members of. which the upper enters, with a snug fit, the downwardly opening channel of an end rail and is rigidly secured to said rail, as for instance by welding or riveting. The upper leg-member is slidingly fitted within the lower member and is provided with an elongated, vertically disposed slot whereby said upper leg-member may be adjustably bolted to the lower. The lower end of each lower leg-member is provided with a slot in the base of the channelbar and the adjacent side portions are bent in opposite directions at right angles to the length of the member to provide integral supporting feet disposed in the direction of the length of the table. each of said feet being formed with a slotted boss to facilitate the bolting of the leg-members to the floor. The end rails of a table-section are connected by cross-rods lodged in the table-top so as not to interfere with any type of power-transmitter construction which may be employed with the table.

In the accompanying drawings, Fig. 1 is a side view of the supporting structure .for power-tables constituting the present imsame. Fig. 8 is a detail sectional view illustrating the supporting means for one type of power-transmitter hanger. Fig. 4 is a top plan view of the feet of a leg-member, the channel-bar, constituting said leg-member being shown in section. Fig. 5 is a detail perspective view of a portion of a rail and the rail-connecting cross-rods secured thereto. Fig. 6 is a perspective view of the end of a cross-bar, together with its securing bolt. Fig. 7 is a detail perspective view of a section of complemental leg-members, together with the securing bolt therefor. Fig. 8 is a plan view of an end of a cross-bar flattened out, to better illustrate the construction of the flanged end of said bar.

Referring toAthe drawings, the table-top supporting structure is shown as having vertical, primary leg-members 1 each comprising sheet-metal channel-bars of horizontal lJ-shape in cross-section. Thelower end of each of the leg-members 1 is provided with aslot 2 in the base-portion of the channel- "tions substantially normal to the length of the bar to provide feet, as3, integral with a legmember. Each of the feet 3 is stamped to form a raised boss 4 which is provided with an elongated slot- 5 for a securing bolt (not shown), the slots 5 permitting a limited adjustment of each leg-member crosswise of the length of the table.

Two primary leg-members l are employed at each end of a table-top section, being disposed in spaced relation with the channels facing each other so. that the leg-member channels may be, entered by the opposite ends of a channel-bar cross-bar 6 ofinverted U- shape in cross-section. The width of the base-portion of the crossbar 6 is such that the ends of the cross-bar have a fairlysnug fit within the channels of the vertical legmembers. Each cross-bar 6 is detachably but firmly secured upon its respective leg-members by a novel construction substantially increasing the rigidity of the structure. This construction is illustrated more particularly in Figs. 6 and 8. In Fig. 8 a portion of the cross-bar is shown as flat, i. e., before it IS bent into channe1- form, to better illustrate a preferred method of constructing the flanged ends of the cross-bar. A tongue 7 is formed at each end of each cross-bar by provement. Fig. '2 is an end view of the parallel slits A cut in the base-portion of the free edges of the lips in substantial alinetill the bar, which tongue 7 is provided with a rectangular aperture 8. The side members of the crossbar are cut away, as indicated by the dotted lines in Fig. 8, a distance less than the depth of the slits A to provide lips 9. The tongue 7 and the lips 9 are preferably but not necessarily stamped out before the cross-bar is bent into channel form. The tongue 7 is then bent dtwn crosswise of the channel of the'bar, while the lips 9 of the side-members are bent over the tongue with merit-with the side walls of the aperture 8. It will be seen that by means of this construction the tongue 7 is firmly stayed by the lips 9 which in the assembled structure abut against the inner base-portion of a leg-member. The cross-bar securing means comprises a bolt 10 of which the head 11 isslabbed at opposite sides to provide flattened surfaces 12 engaging the side walls of the rectangular aperture 8. The bolt 10 projects between the lips 9 and through aisuitable aperture in the legrnember 1, being secured by a nut 13 and a washer 14.

The upper ends of the primary leg-members 1 are slidingly entered by secondary leg-members 15 also comprising channel-bars facing in the same direction as the primary leg-members. Each of the leg-members 15 is adjustably secured upon a primary legmember 1 by a bolt 16 similar to the bolt 10, said bolt 16 having its slabbed head 17 seated in an elongated, vertically disposed slot l8 provided in the base-portion of the channel-bar leg-member'15, as clearly shown in Fig. 7. The bolt 16 enters a suitable aperture in the leg-member 1 and. is secured by a nut 19 and washer 20. Upon the upper ends of a pair of leg-members 15 is rigidly secured, as for instance by welding or riveting, an inverted ll-shaped channel-bar 21 comprising an end rail for the table-top supported by the leg-members described. The ends of the leg-members 15 fit snuglywithin the channel of the rail 21 whereby suficient rigidity is obtained to obviate the necessity of employing additional webs or other staypieces. A rail 21 is disposed at each end of a table-section, a air of rails being connected by two cross-r0 s 22 havingtheir flattened, overlapping ends secured upon'the upper surfaces of the rails by bolts, as 23.

The machine-supporting table-top sustained by .the structure hereinbefore described may be of the trough type or the flattype, one form of the latter being illustrated in the accompanying drawings. The tabletop shown comprises front and rear machinesupporting planks 24 and 25 and an intermediate plank 26. At their opposite ends, these table-top planks overlie and are secured upon the rails 21. The plank securing means comprises an upper clamp-member 27- at each end of each plank, said clamp-members 27 eas lie being disposed widthwise of the planks, i. e., substantially parallel to the rails Underlying each rail so as to bridge the channel and engage the side member edges thereof are a plurality of grooved clam plates 28 opposed to each. of the clamp-menu ers 27, said clamping elements being secured by bolts, as29, passing through suitable apertures in the planks and in the supporting rail. The front and rear planks 24: and 25 are undercut along their inner longitudinal edges to provide shoulders 30 overlying the intermediate plank 26 and'also provide a clearance for the cross .rods 22. lit will be observed that by means of the construction described, the cross-rods 22-extend from rail to rail within the thick ness of the planks and can not in any way interfere with the power-transmitters selected for use in the tables.

One of the features of the present tablesupporting structure is the capability of its use with a variety of types of commercially employed power-transmitters. Two types tilt llti

i t t also particularly adapted for supporting an electric-transmitter as disclosed in theEames W ebb patent application Serial No. 2,540, filed J an. 15,1925.

llltl Another feature of the present structure is a the convenience of shipment of the unassembled parts thereof, as well as the facility with which they may be assembled. The low cost of manufacture by virtue of the simple character of the construction is another item of considerable importance and particularly as the construction may be made standard for a variety of types of power-transmitters. Having thus set forth the nature of the invention, what I claim herein is 1. A supporting structure for a powertable consisting of supporting legs each comprising "substantially vertical primary and secondary channel-bar leg-members sliding ly disposed one within the other, meansfor adjustably securing said leg-members together, spaced supporting rails of inverted U-shape sustained by pairs of secondary legmembers, the supporting rails and the upper ends of the secondary leg-members having a channel-Wall fitting engagement of one within the other, and a table-top secured upon said spaced'rails. I

2. A supporting structure for a power- I table, consisting of supporting legs each comprising substantially vertical primary and secondary leg-members of horizontal U-shape in cross-section and slidingly disposed one within the other, spaced supporting rails sustained by the secondary leg-members, the supporting rails and the upper ends of the secondary leg-members having a channel-wall fitting engagement of one within the other, a table-top secured upon said spaced rails, and

vchannel-bar cross-bars rigidly connectingpairs of primary leg-members.

3. A supporting structure for the tabletop of a power-table, comprising pairs of primary channel-bar leg-members having the channels thereof facing each other, pairs of secondary leg-members, adjustably secured upon said primary leg-members, a table-top supporting rail of inverted U-shape in crosssection having a channel-wall fitting engagement with the channel-walls of each pair of secondary leg-members, and a channel-bar cross-bar having a channel-wallfitting engagement with each pair of primary legmembers.

4. A supporting structure for each end of the table-top of a power-table, consisting of supporting legs each comprising complemental primary and secondary channel-bar leg-members slidingly disposed one within the other, one of said leg-members being provided ,Wl'tll an elongated vertically disposed slot, a slabbed bolt seated in said slot secured in an aperture in the complemental member, s aced table-top supporting rails of inverted ll shape in cross-section sustained by the secondary leg-members, and channel-bar crossbars r1 gidly connecting the primary leg-mem bers.

5. A supporting structure for the table-top of a power-table, consisting at each end of the table-top of an inverted U.-shaped channelbar end-rail, channel-bar legs of horizontal U-shape in cross-section having the channels thereof facing each other, and a channel-bar cross-bar having its ends rigidly but detachably secured entirely within the channels of the channel-bar legs. I

,6IA supporting structure for the table top of a power-table, consisting of table-top supporting rails, channel-bar supporting legs for each rail of which legs the channels face each other, inverted U-shaped channel-bar cross-bars having their ends confined entirely within the channels of said legs, and means for rigidly but detachably securing the CI'OSSf bars to said legs.

7 A supporting structure for the tabletop of a power-table, consisting of table-top supporting rails, channel-bar rail support- .ing legs, and leg connecting cross-bars, each of said cross-bars comprising a channel-bar provided at each end thereof with an apertured tongue substantially normal to the length and crosswise of the channel of the cross-bar the ends of said cross-bars being ensaid cross-bars entirely within the channels of said legs.

9. A supporting structure for the table-top of a powertable, consisting of table-top supporting rails, channel-bar supporting legs for each rail of which legs the channels face each other, and channel-bar cross-bars secured within the channels of said legs, the securing means for each of said cross-bars comprising a tongue provided with an angular aperture and bent inwardly from the base of the cross-bar crosswise of the channel table-top above said rails, clamp-plates bridging the under side of said rails, and boltssecuring said clamp elements in table-top Itastening position.

ll. A table top supporting structure for sewing and like machines, comprising channel-bar rails of inverted i tl-shape in crosssection, rail-supporting legs, and leg connecting cross-bars, a plurality ot'clamp-memhers overlying the table-to substantially parallel to said rails, a plum ity of clamp-plates complemental to each of said clamp-members bridging the under side of said rails,

and bolts securing said clamp-elements in table-top fastening position.

12; A supporting structure for the tabletop of a power-table consisting of spaced suporting rails, oppositely facing channel-bar egs for supporting each of said rails, and

channel-bar cross-bars having their ends secured within the channeled legs, the lower end of the base of each channel-bar leg being slotted and both of the adjacent sides bent normal to the length thereof to provide integral feet for said legs, extending therefrom in the direction of the length of the table-top. I

13. A siipportin structure for the tabletop of a power-table comprising end rails of inverted U-shape in cross-section ciisposedl eonnecting cross-rods disposed between the crosswise of the tab1e-t0p,-imil-supperting upper and under surfaces of the table-top, 1

legs, and a. rail-connecting cross-rod: securedl and; means for securing said cross-rods upon upon the upper surface of the rails indepentithe rails independently of the table-top.

5 ently of the table-top.

In testimony whereof, I have signed my 14:. A supporting structure for the tablename to this specification. top of a, power-table eemprising table-top supporting rails, rail-supporting legs, rail- GEORGE M. m nus.

Images