US1639510A - Extension table - Google Patents

Description

I Aug. 16, 1927. R- KRUGER EXTENSION TABLE Filed April 22. 1926 2 Sheets-Sheet 1 Aug. 16, 1927. 1,639,510

R. KRUGER EXTENS I ON TABLE Filed April 22. 1926 2 Sheets-Sheet 2- Patented Aug. 1 6,- 1927.

UNITED STATES 1,639,510 PATENT OFFICE.

RICHARD KRI l'GER, 0F NIENBURG-ON-THE-SAALE, GERMANY.-

EXTENSION TABLE.

Application filed April 22, 1926, Serial No.

This invention relates to new and useful improvements in extension-tables with double leaves or panels on each side of the middle plate, said leaves on each side being hingedly connected with one another, and separate extensible bars being arranged for carrying the extreme leaves.

In extension-tables of known construction of this type the pair of extension-leaves 011 each side of the middle plate is lifted.for an amount equal to twice the thickness of a single leaf with the aid of wedge-shaped extension-barsarranged under the inner extension-leaves. In oppositionthereto the pair of extension-leaves according to the present invention is lifted by said wedgeshaped extension bars only for an amount equal to the thickness of one single leaf whereas the lifting for the second leaf-thickness is perform-ed with the aid of revoluble arms gripping under the wedge-shaped extension-bars and raising them with said leaves. The raising of the leaves for the second leaf thickness thus is considerably facilitated:

The supporting of the extended .outer leaves according to the present invention is effected by separate extension-bars arranged in grooves of the commonly used wedgeshaped extension-bars for the pair of inner extension-leaves, said outer extension-bars being first drawn out with said wedgeshaped bars and being hereafter drawn out of the latter bars in horizontal direction. It is true that telescope-bars are known in connection with extension-tables, but it is new to use the same in combination with an arrange'ment for raising the extension-leaves.

The revoluble arms or levers for furtherraisin the leaves are preferably constructed accor ing to the present invention like. segments standing on edge so that, notwithstanding the great simpicity of construction, great resistance and security of operation are ensured.

In order to make it possible that extension-tables of this type can be lifted and transported by gripping the extension-leaves as well when the table is in the unextended as when it is in the extended state, the inner ends of the wedge-shaped extension-bars are of such a length that they will rest upon a transverse member of the table frame if the table is in the unextended state. If the table in this state is gripped under the leaves for lifting the table, it is not possible that 103,698, and in Germany February 9, 1924.

the leaves may tilt up. To prevent in a similar manner the tilting up of the leaves if the table is extended, noses are arranged on the lower side of the wedge-shaped extension-bars behind studs which will engage with notches of the revoluble arms or levers said noses gripping under the axles of sai revoluble levers when the leaves are being raised, a further raising of said wedgeshaped bars and of the extension-leaves being prevented if the extended table is moved in gripping said leaves.

Several embodiments of the invention are shown, by way of example, in the accompanying drawings in which Fig. 1 shows in elevation, partly in section, the top portion of the table completely extended at one side.

Fig. 2 is a similar view, only one leaf of one side being extended.

Fi 3 is a view similar to that of Fig. 1, showing a modified construction, two leaves being extended on one side;

Fig. 4; shows, on a larger scale, a constructional detail;

Fig. 5 shows the extension-table according to Fig. 3 in unextended state and partly in longitudinal section along another line than Fig 3;

v ig. 6 is a cross section through the same table; and

Figs. on a larger scale;

The outer and inner 'e.\'tension- leaves 2 and 3 and 2 and 3 respectively are situated underneath the middle plate 1 if the table is in the unextended normal state, the extension- leaves 2 and 3 or 2 and 3 respectively of each pair being connected with one another by a hinge 30. The middle plate or table top l consists of two halves joining at the center and connected with one another by a tongue-connection 4. The parts of the table top 1 rest upon a bridge 5 fixed on the table'fram e and said parts can be turned slightly around this bridge by means of cheeks 6-fixed on the lower surface of said plate elements and engaging with corre spondiug grooves ofbridge 5.

. Extension-bars 7 and 7 are fixed on the lower surface of the inner or lower extension- leaves 3 and 3, the, bars 7 being'ornitted for clearness sake in Figs. 1 to 3, and the bars 7 and 7* being omitted in Fig. '5. The extension-bars 7 and 7 which are guided in angle irons 8' (Fig. 6) have each a longi- 7 and 8 are constructional details" tudinal groove. An extension-bar 9 having a handle 10 on its outer end is arranged in each of said longitudinal grooves of the bars 7 and 7 The lower surfaces of the extension-bars 7, 7 a are wedge-shaped by the bars being thickened towards the centre of the table. Band irons 11 are fixed on this lower surface of bars 7 and 7 which may run upon ball-bearings 12 arranged in a transverse member 13 of the table frame.

On the transverse member 13 the revoluble arms or levers are also mounted which serve for raising the pairs of extension leaves for the second leaf thickness. These revoluble arms or levers consist each of a segment 14 of strong resistant material as steel, standing on edge, and pivotably mounted in a holder 15 fixed by means of strong screws 16 on the transverse member 13 (Figs. 4, 7 and 8). In the circumference of each segment 14 a notch or incision 18 is arranged with which a projection or stud 19 comes in engagement which is mounted on the lower surface of the inner portion of each wedge-shaped extension-bar 7 or 7*.

On each of the inner leaves 3 and 3' a leaf-lifter is arranged which consists of two co-operating double-armed levers 20 and 21 (Fig. 5) pivotably mounted on pivot axles 24 and 25 and adapted to be operated with the aid of a handle 23, said levers 20 and 21 passing through a slot 22 in the table frame when the table is to be extended.

In order to securely guide the extensionbars 9 and to prevent lowering of said bars if the table leaves are loaded, these bars are provided with lateral guide pins 28 (Fig. 6) sliding in horizontal grooves 29 (Figs. 1 to 3) 1n the sides of the extension-bars 7 and 7 7 The inner end of the sliding-bars 7 and 7 is set off in such a manner that a tongue 32 is formed (Figs. 1 and 2) which is adapted to engage with a free space 34 above the. transverse member 33 of the frame of the other half of the table and to rest upon this transverse member 33 as indicated in dash lines in Fig. 2. If the table has to be lifted in its unextended state by being gripped at the leaves 3 and 3 the tongues 32 of the barsv 7 and 7* are pressed upon the trans verse members 33 so that a tilting of the leaves is prevented and the table can be easily lifted and transported. In the form of construction shown in Figs. 3 and 5 this arrangement is omitted. I

In the form of construction shown in Figs. 1, 2'and 4 hook-shaped metal pieces 36 are fixed on the lower surface of the extensionbars 7 and 7 behind the studs 19. The hookshaped end 37 of said metal pieces projects into the path of the segments 14 in such a manner that after the turning of these segments and the raising of the bars 7 with theleaves restingupon them, said hook-shaped ends'37 will bear from below against the lugs 35 of said segments 14 as indicated in Fig. 4 in dash lines and as can be seen from Fig. 1 also. If in the extended state the table has to be lifted and the extension-bars 9 are gripped (Fig. 1) and lifted, the hooks 37 hearing from below against the lugs 35 of the segments 13 prevent tilting of the extension-bars and of the table leaves resting upon them. The table can therefore be easily lifted and transported also if the leaves are extended. This arrangement is omitted in the.form of construction shown in Figs. 3 and 5 to 8, the segnierv 1i and the studs 19 being of somewhat dili'erent shape.

If the leaves at one side of the table have to be extended,-the handle 23 of the leaveslifter 20 is gripped and the leaves 2 and 3 together with the wedge-shaped bars 7 and the bars 9 are drawn out from under the table top 1. During this action the band irons 11 on the lower surface of the wedgeshaped bars 7 slide along the ball bearings 12 upon which" the leaves first rest. The leaves 2, 3 are, in being pulled-out, raised at the same time for one leaf-thickness by the action of the wedge-shaped extensionbars 7 so that the leaf 2 will stand now in the sameplane as the table top 1 (see Fig. 2), Whilst the inner end of the inner or lower leaf 3 is still underneath the table top 1. In this position, as shown in Fig. 2, the table may be used with one leaf at one or both ends being pulled out. If three or four leaves have to be pulled out the extensionbars 7 and the leaves 2, 3 are further. pulled out by means of the leaves-lifter 20. At the beginning of this movement the studs 19 or 19 engage with the notches 18 of the segments 14 or 14 and then turn the same in upward direction if the movement continues. The extension-bars 7 and with the same the leaves 2, 3 carried by them, are raised for the second leaf thickness so that the leaf 3 will then stand in the same plane as the table top 1 (Figs. 1 and 3). Now the bars 9 are drawn out of the bars 7, and the leaf 2 can he turned around the hinges 30 and placed upon the bars 9. The leaves 2 and 3 then are carried only by the strong segments 14 which however carry the same quite securely and without the assistance of foldable feet;

The bars 7 have at their rear end cut out portions'31 (Fig. 2 which bear against the sides of bridge 5 o corresponding'shape, if

Numerous modifications of the form of construction shown are possible without departing from the idea of the invention.

Havlng now particularly described and ascertained the nature of my said invention,

tension-bars for the outer leaves, said auxiliary bars being slidably arranged in grooves of said wedge-shaped extension-bars and being horizontally. guided therein, revoluble arms arranged on the table 'frame beneathsaid wedge-shaped extension-bars, and means arranged on the lower surface of said wedgeshaped bars for engaging and turning said revoluble arms.-

2. Extension-table with two extensionleaves on each side ofthe table, both said extension-leaves being hingedly connected with one another, and with Wedge-shaped extenwedge-shaped extension-bars and being horizonta1ly guided therein, rotatably mounted segments arranged on the table frame beneath said wedge-shaped bars, a notch in the circumference of. said segments, projections arranged on the lower surface of said wedgeshaped bars, said projections engagin said notches of said segments when the ta Is is being extended.

3. Extension-table as claimed in claim 2, hooks arranged on the lower surface of said wedge-shaped extension-bars behind said projections, lugs formin the hinges of said rotatable segments, said ooks coming in engagement with said In s when said leaves with said wedge-shape extension-bars are being rai'sedby means of said rotatable segments. v

In testimony whereof I have hereunto set my hand.

RICHARD KRUGER.

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