US2187423A - Drop leaf extension table - Google Patents

Description

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Patented Jan. 16, 1940 UNITED STATES} PATENT orrics 12 Claims.

My invention relates to improvements in a drop leaf extension table, and it consists of the combinations, constructions and arrangements hereinafter described and claimed.

An object of my invention is to provide a drop leaf extension table in which an elongated platform is supported by a base and carries a turntable that is adapted to be swung through an arc of 90. Two groups of extension slides 10. are secured to the turntable and are adapted to be keyed to the platform when the table top is opened or closed. This keying of the slides to the platform prevents rotation of the turntable, slides andtable top with respect to the platform 1.5 when the table top is extended or closed and and. gears that control the opening and closing movement so that a movement of one side of the table into open or closed position will automatically move the other side. This permits one person to open or close the table and the top sections will always be balanced on the platform and base.

The extension mechanism .supports only the extensible ends of the table top and it is there- 5 fore possible toswing the drop leaves into inoperative position if desired, when the table top is extended. The slides extend transversely to the platform when the table is closed and parallel to the length of the platform when the table is swung into-a position ready for opening.

Other objects and advantages will appear in the following specification, and thenovel features of the device will be particularly pointed out in the appended claims. My invention is illustrated in the accompanying drawings forming-a part of this application, in which t Figure 1 is an end elevation of the table shown in closed position;

. Figure 2 is a top plan view of Figure 1;

Figure 3 shows the table top swung through an angle of and partially opened;

Figure 4 is a bottom plan view of Figure 3 showing the top fully extended; Figure 5 is a viewsimilar to Figure 4, but

other suitable fastening means.

showing the top closed and the platform omitted;

Figure 6 is asection along the line 6 -6 of Figure 5; l

Figure '7 is a perspective view of the table 5 extended; and Figure 8 is an isometric view of the platform.

In carrying out my invention, I provide a table with an elongated platform l supported by a pedestal or leg base 2. The platform may be 10 made of any material desired, preferably wood, and Figure 4 shows the platform as being elongated and provided with curved ends 3. I do not wish to be confined to the particular type of supporting legs shown at 2, in Figure 1, since 15.

any type of support for the platform may be used. The platform has a circular recess 4.. formed therein and a turn table 5 is rotatably mounted in the recess. Figure 6 shows a screw 6 forrotatably connecting the turn table with 20 the platform. A sleeve I receives the screw shank and the head of the screw is tightened down against the end of the sleeve. The sleeve is of a length that will permit the free rotation of the turn table 5 in the recess 4 even though 25 the screw is tightened in place.

In Figures 3 and 4, I show an arcuate slot 8 formed in the bottom of the recess 4 and extending through an arc of 90. A pin 9 is carried by the turn table 5 and is slidably received 39 in the are. When the table is in closed posi tion, the pin 9 will be at the end of the are shown in Figure 2 Before the table can be completely opened, the table top must be partially opened and then rotated in a clockwise direction until the pin 9 abuts the other end of the slot as shown in Figure 3. This will be described in detail hereinafter.

The upper surface of the turn table lies flush with the upper surface of the platform for a purpose now to be described. A plurality of extension slides are arranged in two groups and are carried by the turn table and the center slides l0 and H1 in each group are rigidly connected to the turn table top by screws II or Slides l2 and I3 in one group are mounted on each side of the slide I0 and are slidably keyed thereto by dovetail slots and keys in the manner shown in Figure 6. Slides l2 and I3 of the other group 50 are in like manner slidably keyed to the slide Ill. In Figure 3, I show the slides 10 and I0 carrying gears l4 and M and these gears mesh with racks carried by the adjacent slides. The slides 12 and I3 carry racks l5 and I6 that mesh with the gear i l and the slides l2 and i3 carry racks l5 and E6 that mesh with the gear The slides i2 and it have extension slides l7 and i8 slidably keyed thereto and the extension slides in turn carry end slides 59 and. 20 which are slidably keyed thereto. I'he same is true with the extension slides I? and i8 and end slides l9 and 20'. In Figure 4, I show the underside of the slides and illustrate how the slides iii and El are connected to the slide it by a gear 2i carried by the underside of the slide l2 and meshing with racks 22 and 23 carried by the undersides of the slides iii and ll respectively. In like manner, I show how the slides iii and it are connected together by a gear 2 5 that is carried by the slide 53 and this gear meshes with racks 25 and 25 carried by the undersides of the slides if! and i8 respectively. Referring again to Figure 3, it will be noted that the slides i2 and iii are operatively connected together by a gear 2i carried by the slide El and meshing with racks 28 and 29 carried by the uppersides of the slides l2 and i9 respectively. The slides 13 and 2b are likewise connected together by a gear t ll carried by the uppersides of the slide "3 and meshing with racks 3! and 32, carried by the uppersides of the slides 83 and 29 respectively. Corresponding reference numerals are given to the other group of gears and racks and these reference numerals are primed in order to distinguish between the two groups.

The end slides l9, l9, 2% and 2t carry table top sections 33 and 34. When the table top is closed, the sections 33 and 34 abut each other and pins 35, see Figure 2, carried by the section 3 enter recesses in the section 33. Drop leaves 36 and 3? are hinged at 38 and 39, see Figure 1, to the sections 33 and 3d. When the table is closed, the leaves 88 and 3? may extend downwardly as shown in Figure 1. An apron is carried by the sections 33 and 3 3 and encloses the slide mechanism. This apron is composed of two U- shaped parts MI and Mia and these parts are spaced from each other when the table top is extended. The apron part 4% carries arms M that are swingable about vertical axes and when swung into the extended position shown in Figure 3, will support the drop leaf 36 in a horizontal position. In like manner, the apron part Mia carries arms 62 that swing about vertical axes and these arms support the drop leaf 3'! in a horizontal position. The table top sections 33 and M may be secured together by hooks 43 or any other suitable fastening means, see Figure 2.

I provide novel means for locking the table top against rotation when the top is in closed position and also for locking it against rotation when in open position. The slides 42 and [3 are provided with dove-tail keys A l and 35 on their under surfaces and these keys are receivable in keyways 46 and d! in the upper surface of the turn table 5. When the turn table is in the position for permitting the table top to be extended. the keyway 46 aligns with a keyway as in the platform I and the keyway 4'! aligns with a keyway 69. The movement of the slides as the table top is extended will cause the keys M, and 45 to enter the keyways E8 and 49 and in this way the slides will be anchored to the platform and will prevent relative rotation between the table top and the platform. The other group of slides are provided with keys and keyways and corresponding reference numerals are applied and primed so as to distinguish from the first group.

In Figure 5, I show the keys 45 and 45 extending beyond the turn table 5 when the table top sections 33 and 3d are moved into abutting relation. In Figure 3, I show recesses 50 and 58 for receiving the projecting portions of the keys 15 and 65 when the table top sections are fully closed. This will prevent the rotation of the table top with respect to the platform when the table is closed. The keys 5 and ii are so arranged that they will permit the table top sectionsto be only partially opened before they will abut the periphery of the recess This initial opening movement, however, is sufficient to remove the keys from the locking recesses. The other ends of the keys G5 and 25 when striking the peripheral wall of the recess l will prevent further opening of the table top sections until the turn-table is swung through an arc of This rotation will bring the keys A5 and t5 into registration with the keyways it and 49, whereupon the table top may be opened to the desired extent, the keys sliding in the keyways, thereby interlocking'the turntable 5 and the extensible slides to the platform i.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

The table when closed as shown in Figure 1, will occupy very little space. All of the slides will be concealed by the top sections 33 and 3d and the apron parts MI and Mia, and therefore the table resembles a small drop leaf table in appearance. The table top may be doubled in size when the drop leaves 35 and 3'! are raised into a horizontal position and supported by the arms 4! and 42. If itis desired, to enlarge the table top still further, the hooks 43 are released and then the table top is partially opened by moving the sections 1-33 and 34 slightly apart. This movement will free the keys .5 and 45 from the recesses 5i! and Eli in the manner already set forth and then the table top may be swung through an arc of 90 and will turn the slides and the turn table therewith. When the slides are parallel with the longitudinal axis of the platform I, they may be extended and their keys will be received in the keyways .8, 48', as and 49'. Additional leaves 5! may now be placed between the table top sections 33 and 3d and will rest upon the slides. Each leaf may carry projections in one edge receivable in recesses in the adjacentleaf edge in the customary manner, none being shown. The table top cannot be rotated when extended. The slides extend only to a point where they will support the sections 33 and 34 and therefore they will not interfere with the raising and lowering of the drop leaves, regardless of whether the table is closed or extended. If desired; drawer compartments 52 may be placed at the ends of the table sections (it and. 34, see Figure 2. The drawer compartments are carried by the apron M) and Mia and are disposed above the platform I. Napkins and silverware may be placed in the drawers, if desired. It will, be noted from Figure 4 that the keys M and 45 are broken away to receive the gears 2! and M. The dovetail shape of the keys not only looks the table top against rotation. but anchors the ton to the platform so that the table may be lifted and moved by raising the top without the entire load being carried by the central screw. The greater length of the platform will parallel the greater length of the table top when opened and this will provide an additional support for the table top 75 when fully extended. In addition, the gears and racks equalize the opening and closing of the two table top sections and there will be a proper balancing of the top on the platform at all times.

The arms ll and t2 when not extended to support the drop leaves it and 3'! lie parallel to the sides of the apron sections Mi and 48a as shown in Figures 1 and 2. Sufficient space is provided between the leaves it and 31 when hanging downwardly from the sections 33 and M, and the apron to receive the arms. The manner of slidably keying the slides together as shown in Figure 6 is of standard practice and therefore needs no detailed description. The keys the connecting the slides together are in the form of double dovetails. Two keys are used to connect adjacent slides, one key being secured to each slide. The keys will therefore as!) as stops when the slides are fully extended and will permit the slides to open only to the desired extent.

In the drawings I have shown the top of the turn table lying flush with the top of the platform base. It is possible to position the top surface of the turn table above or below the top of the platform. The novel feature of the invention is to cause one or more keys affixed to the undersurface of the slides to enter one or more grooves in the platform when the slides and turn table against rotation. The platform could carry ridges receivable in grooves in the slides if desired. Although I have shown a turn table in the form of a disc, any means for rotatably securing the slides to the platform willconstitute a turn table in the broad sense.

The keys on certain slides not only pass into grooves in the platform when the slides are extended or when they are closed, but the keys are dove-tail in shape and will secure the slides to the platform. In this way, the table top, slides, turn table and platform are locked together into one immovable unit when the table top is closed or opened and this will permit the table to be handled and transported as a single unit without the risk of breakage of the assembled parts or without the chance of these parts becoming displaced. It is obvious that a T-shaped key or other type of locking the slides to the turn table and platform may be used.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the'scope of the appended claims without departi the platform, slides carried by the turn table, certain of said slides having keys on their undersurfaces, said turn table having keyways for slidably receiving the keys, said platform having keyways extending in the direction of the length of the platform and aligned with the turn table keyways when the turn table is rotated into a predetermined position, whereby the slides may be extended when parallel with the elongated sides thereof, and table top sections carried by the slides, the slides connecting the sections together.

2. An extension table comprising an elongated platform, a turn table carried thereby and having pairs of keyways, slides carried by the turn table, certain of said slides having keys slidable in the keyways, said platform having key receiving recesses extending at right angles to the length thereof and key receiving keyways extending parallel with the length thereof, two table top sections carried by the slides and designedto abut each other when the table top is closed and the sections extend parallel with the length of the platform, said keys entering the recesses when the sections are closed whereby the sections, slides and turn table are locked against rotation, said keys also being receivable in the platform keyways when the keys are retracted from the recesses and the turn table is rotated to align the keys with the platform keyways, said slides being extensible to separate the sections and the keys sliding in the platform keyways and locking the turn table from rotating.

3. In an extension table, a platform, extensible interconnected slides rotatably carried by the platform, at least one of said slides carrying a key, said platform having a keyway for receiving the key when the slides are extended, whereby the slides will be locked against rotation on the platform when the slidesare extended.

l. An extension table comprising an elongated platform, slides rotatably carried thereby, at least one of said slides having a key, said platform having a key-receiving recess extending at right angles to the length thereof and a keyway extending parallel with the length thereof, table top sections carried by the slides, said key being received in said recess when the table top sections abut each other, and being received in the keyway when the slides are extended, whereby the slides and table top sections will be held against rotation on the platform when the slides are extended and when the slides are closed.

5. In a device of the type described, a platform, extensible interconnected slides rotatably carried thereby, table top sections carried by the slides, said slides and table top sections rotating as a unit on the platform, and means forlimiting the rotation of the slides to an arc of 90.

6. In an extensible table, a platform, extensible slides rotatably carried by the platform, cooperating means carried by the slides and platform for locking the slides against rotation on the platform when the slides are extended, and table top sections carried by the slides and being interconnected therewith, the locking of the slides to the platform making a unitary structure of the sections, slides and platform.

7. An extension table comprising an elongated platform, a turntable carried thereby and having keyways therein, two groups of slides each having their center slides secured to the turntable, certain of said slides having keys slidable in the keyways, tabletop sections supported by the slides and being movable from closed to open position, said sections lying parallel with the length of the platform when the table top is closed, said table top sections, slides and turntable being swingable through 90 to dispose the slides parallel with the length of the platform, said platform having keyways therein aligned with the turntable keyways when the turntable is in a proper position for extending the slides, said platform keyways receiving the slide keys when the slides are extended, whereby the turntable, slides and table top sections are held against rotational movement with respect to the platform and are also secured against being lifted from the platform when the table is raised by the top sections.

8. In an extension table, a platform, a turntable rotatably carried thereby, slides carried by the turntable, said platform and slides having cooperating means for slidably securing certain of said slides to the platform when the turntable is in one position and the slides are closed and when the turntable is in another position and the slides are opened, said means securing the platform, turntable, and slides together as a unitary structure when the parts are in either of 511856 two positions, the turntable and slides also being held against rotative movement.

9. A table of the character described including an elongated horizontal platform mounted on a vertical support, a turntable secured to said platform and being swingable through an arc of 90, slides carried by the turntable, and separable table top sections secured to certain of the slides,

the slides being slidably secured to the platform when the table top sections are closed or opened in such a manner that when the table top sections are separated from each other, they will still be supported by and connected to the platform by the slides.

10. An extensible drop leaf table including two groups of leaves, each group comprising a main leaf and a drop leaf, the main leaves meeting at a center line of the table, a platform underlying the centers of said main leaves, a turntable rotatably mounted on the platform and having a free rotating movement of 90, slides secured to the turntable and to the main leaves, whereby the leaves may be turned from a lengthwise position on the platform to a transverse position, and cooperating means between the slides and the platform for slidably securing the slides to the platform when the leaves are separated at their center line, said means also preventing rotation between the slides and the platform when the slides extend beyond the turntable.

11. An extension table comprising an elongated platform, a turntable carried thereby and limited to a rotative movement of'90", table slides secured to the turntable and carrying equalizing means for causing the slides to uniformly open and close, table top sections secured to the end slides and lying parallel with the length of the platform when the table is closed, cooperating locking means carried by the slides and platform for preventing rotation of the turntable, slides and table top sections when the table is closed, and for securing the slides against vertical movement with respect to the platform, means cooperating with a part of the locking means, whereupon the turntable, slides and table top sections may be rotated as a unit through 90 to position the slides parallel with the length of the platform, said cooperating locking means now permitting the table top sections to be opened to any desired extent up to the limit of opening movement, said cooperating locking means now preventing rotation of the turntable, slides and table top sections with respect to the platform and securing the slides against vertical movement with respect to the platform.

12. An extension table comprising an, elongated platform, a turntable rotatably carried thereby, slides carried by the turntable and revolving therewith, means interconnecting the slide and turntable against relative circumferential movement, said turntable being adapted to swing with the slides either into a transverse position of the slides in respect to the platform when the table is closed, or into parallelism with the length of the platform when the table is open, and table top sections extending transversely to and being carried by the slides.

WILLIAM M. HYLAND.

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