US1937250A - Extension table - Google Patents

Description

Nov. 28, 1933. w P SENG ET AL 1,937,250

EXTENSION TABLE Nov. 2s, 1933. i w P, SENG ET 1,937,250

EXTENSION TABLE Filed Jan. 12, 1952 s sheets-sheet 2 J G'. HmsSQZ,

Nov. 28, 1933. w P, sENG ET AL EXTENS ION TABLE Filed Jan. l2, 1932 3 Sheets-Sheet 3 7 I u n j l L N /Zw RQ JB Q@ *e Patented Nov. 28, 1933 PATENT "o1-FICE 1,9if'z,25o EXTENSION TABLE Wendelin P. Seng and George Hassel, Chicago, i Ill., assignors to The Seng Company, Chicago,

Application January 12, 1932,.` i' Serial No. 586,196Y Y 9 claims. (Cris-1ra) Our invention relates to extension tables of that special type in which a divided top of separable sections having runners or slides are'mounted on a frame for longitudinal movement of said top sections to receive between them a verticallyv movable extra section or leaf for extending the table, with means responsive to the sliding movement of the top sections and their runners or .I 4 slides for lifting the leaf coplanar with the top sections when the latter are separated and Vfor loweringthe leaf to housed -position when the top sections are brought together in contracting the table, *and our invention applies to means operated by the slides for raising and lowering the leaf as well as supporting the same in raised position for the closing of the top sections thereagainst. A y

The principal object of our invention is to simplify the mechanism for operating the leaf on the movement of the table topgsections and their slides contemplating an arrangement-usable in connection with metal and wooden slides that will effect the required operations in 'apositive and reliable manner. Our invention therefore consists in providing the slide of a table top section with an inclined slot 'orgroove for lifting the leaf by engagement therewith of a pin or roller carried by 'said leaf and -a horizontal slot extending across the upper end of said inclined'slot and along which the pin or roller travels in maintaining the leaf in elevated position, in combination with a pivoted dog operating to bridge the-upper vend of the inclined slot to .permit the leaf supporting roller to passfalong the horizontal slot from one side to the other, the normal position cf the, dog .leavingY the upper end of the inclined slot open; `all as hereinafter fully described and claimed.

n In the drawings2- Figure 1 is a plan Viewv of an extension table provided with our improved leaf operating means. Fig. 2 is a longitudinal sectionalview with the leaf housed.

Fig. 3 is a similar View with the slidable top sections extended and the leaf in pcsitionvto be received between the same. f n l Fig. 4 is a like view withthe slidable top sections closed against the leaf.

Fig. 5 shows the leaf supported by the dog for the closing of they top sections. Y

'Fig., 6 is an enlarged detail View of the application -of our invention to a metal' slide.

Fig. 7 is a detail plan View illustrating the rack y 'and pinion device for operating. the` Sldablestop sections on manipulation sections. I Y

Fig. 8 is a longitudinal sectional vView illustrating our=invention applied to al wooden slide.

Fig. 9 is an enlarged detail view showing thel wooden slide and dog pivoted thereto.

Figli) is a detail View of the wooden slide. Fig. 11 is a modication to show a spring actuated dog, and

Fig.' 12-is a transverse sectional view'on'the line 12-12 of Fg.'9. Y y

Figs. 13 and 14 are sectional views showing an arrangement by which the latchl and cooperating plate are mounted under the table top4 and the rollercarried by the slide,` and" I Fig. l5 is Va vertical sectional View yon the line 15-15 of Fig. 14. Y Illustratingthe application of our invention to the'v usual box-like supporting frame the :latter is provided in addition to the vside and end pieces l5, 16,"with avcentral longitudinal beamor xed slidemember 17 fastenedat its ends to the end pieces of the frame, said center beam or fixed slide member havinglongitudinal grooves 18 at opposite sides thereof-for engagement therewith of the inturned lower anges of themetal slides 19 'and'ZO attached at their outer ends -to filling blocks 21, 21, between said slides and the longitudinally movable top sections 22, 22 of the table, the filling blocks being spaced toreceivelthe' leaf or extra top` section' between them in Vtheclosed arrangement of thetable.` By locating theslides at happroximately the center of the table it is necessary only toprovide'a singlemetal fixture .or device forrais'ing and lowering vthe leaf but it requires that'the leaf 'be rmly guided in its of either one of said miE vertical movementsias well as retained against longitudinalla'nd lateralmovement for the operation of a pin or roller 24 projecting inwardly from thelower'end ofthe leaf supporting bracket 25, and accordingly the leaf is provided nearY itsends with crosspieces 26, 26v bearing against the side pieces 15, v`15 of the supporting frame and at their ends against the end piecesvlylof said supporting frame-:This arrangement for' guiding the leaf` is' no part of our inventionand-is more fully' disclosed in the co-pending application of Martin Fox wherein it isV shown'adapted to diiferent type's'of supporting frames for the tops of extension tables. Furthermore, as shown'in Fig. 7 the metal slides attached to the table top sections are each provided with the usual rack teeth 27`on the inwardly projecting lower flange, which mesh with a pinion 28 atthe center of the longitudinal beam or yfixed slide member 17 vso that the slidable top sections will move back and forth in unison on manipulation of either one of said top sections, and a similar arrangement (not shown) may be provided when our invention is applied to wooden slides.

yIn carrying out our invention in connection with a metal slide we preferably employ a plate 29 attached at its upper end to a downwardly projecting flange 30 of the slide, as 19, the said plate being provided with an inclined slot 31 extending from the lower end thereof and joining a horizontal slot 32 at approximately the center thereof, and in order that the piny or roller 24 may leave the metal fixture or plate 29 when the table leaf is housed below the inner ends of the top sections 22, 22 the lower edge of the forward portion of the plate or metal fixture is above the lower end of the rear edge of the yinclined slot. This plate also is not our invention, forming part of the application of Martin Fox hereinbefore referred to, but is an essential part of the structure embodying our invention.'

In combination with the metal xture above described we use a dog 33, pivoted at 36 to the plate 29 at one side of the upper end of the inclined slot 31 and having a tail piece 34, preferably weighted, so as to be operated by gravity to position the operating member of the dog normally across the horizontal slot 32 and said operating member will be limited in its downward swinging movement by a pin engaging a hook 34 at the rear end of the tail piece so as to extend across the upper end of the inclined slot and form a continuation of the lower edge of said slot for the travel of the roller 24 in maintaining the leaf elevated.` Instead of having'the pivoted dog actuated by gravity to assumek its normal position we may use a spring for the purpose such as illustratedin Fig.- 11 -of the drawings, the dog 37` in this instance which is pivoted on the screw 38and engages the pin 39 being actuated by a spring 41connected to the tail piece 40 at one end and toa bracket 42 attached tothe under side of theslot. i v

As ya further `modification of our invention Y' illustrated in Figs. 8 to 12 we show the pivoted dog applied to a wooden slide 19a having grooves 31a, andr 32acorresponding with the inclined and horizontal slots 31, v32 inpplate 29, with the dog 33a pivoted to the wooden slideby screw 36a at one-side of the upper end of the inclined slot, and which may begactuated by gravity or spring to position the operating member thereof across the horizontal slot,.said dog being in .like manner limited in its downward movement to bridge the upper end of the inclined slot by means of a pin 35a engaging the hook 340. on, the tail piece.

,In the operation of our improved means for bridgingthe upper end of the inclined slot to maintain the leaf in housed position for the closing of the sldable top members in the extended arrangement of the table from the housed position illustrated in Fig. 2 of the drawings, the movement of the slide, as 19 to the left will cause the pin 24 at the lower end of the bracket v25 to pass below the forward reduced end of the moving plate 29 and be directed into the inclined slot 31 by engaging the downwardly extended rear edge of said slot and when the pin arrives at the upper endof said slot or into the horizontal slot further movement ofthe slide on saidpin will swingV the operating member of `the dog rearward and pass beyond the same to the end of said horizontal recess vor in the position shown in Fig. 3 at which time the dog returns to its normal position, as shown in this figure, permitting the pin to ride over the upper end of the inclined slot (see Fig. 6) for the closing movement of the slidable top sections in the arrangement of the table extended, as in Fig. 4. In contracting the table by housing the leaf under the inner end of the slidable top sections when the latter are closed together, said top sections are moved outward a short distance moving the metal fixture to locate the pin on the leaf supporting member at the upper end of the inclined slot in front of the operating member of the pivoted dog whereby inward movement of said top sections for closing the table will cause the pin to travel down said inclined slot andout from the lower end thereof in alignment with the extended rear portion of the plate 29 for the operation in extending the table.

It will be obvious that we provide a very simple arrangement for bridging the upper end of the inclined slot for supporting the leaf by means of the bracket and pin, the latter being supported across-the horizontal slot by the operating member of the dog bridgingl the same, and as the dog is free to swing in both directions it will assume its normal position when the pin arrives at either end of the slot or beyond the end of the operating member of the dog when swung in either direction. f

` In Figs. 13, 14, and 15 we have illustrated a further modification in the use of a pivoteddog Yfor temporarily supporting the leaf in raised position for the closing of the top sections thereagainst, in this instance the said. dog 45 being carried by a metal -xture 46 attached to and depending from the under side of the vertically movable leaf 23 while the pin or roller 49 is carried by the horizontally movable slide 5l; in other words, location of the parts with respect to the table leaf and slide is reversed, and instead of providinginclined and horizontal slots the inclined edge over which the roller travels in raising and lowering the leaf is formed-at the inner end of the metal fixture 46 to cooperate with a bracket 4 7 attached to and depending from the leaf with an inwardly projecting ledge 4S which rests upon the roller when the sections of the table top are closed against the leaf, it being noted that the dog is pivoted at one side ofthe lower end of the inclined edge 52 so 4as'to bridge the gap between the lower horizontal edge 53 and the aforesaid ledge at the lower end of the metal bracket depending from the under side of the leaf. The operation of this modification is the same as that hereinbefore described with reference to that form of our invention in which the dog is pivoted to the plate attached to the slide; that is to say, in closing the top sections after the leaf is raised movement of said top sections inwardly will cause the roller to lift the pivoted dogon a line with the ledge and thereby bridge the gap between the lower end of the inclined edge 52 and the ledge so that the roller will pass along the lower edge of the dog to a position below the ledgeas shown in Fig. 14.

Although we have shown the dog applied lto different forms of fixtures having inclined and horizontal edges over which thel roller travels in the operation of raising and lowering the leaf and for vsupporting the same in raisedposition in closing the top section against. said leaf it will be understood that the principle may be adopted in connection with other different arrangements;

loo

in other words, kour invention embodying the idea y 1,937,250`- lleaf raised is susceptible to other changes or modications within thefspiirt and scope of the appended claims.

- We claim:-

1. An extension table comprising a frame supporting top sections having slides for horizontal movement of said top sections on the frame, and a leaf housed below the top sections and adapted to be raised and lowered withrespect to the same, in combination with a member on one of the slides having communicating inclined and horizontal slots with which a supporting member on the leaf engages in the raising and lowering of said leaf, and a dog pivoted tosaid member to normally extend across' one of the slots and adapted to bridge the other slot for supporting the leaf during the movement of the slidable top sections.

2. An extension table comprising a frame supporting top sections having slides for horizontal movement of said top sections on the frame, and a leaf housed below said top sections and adapted to be raised and lowered-with respect to the same, in combination with a metal slide and plate attached thereto, the latter having inclined and vertical slots cooperating with a support attached to the leaf for raising and lowering the later, a dog pivoted to the plate at one side of the upper end of the inclined slot and adapted to normally extend across the horizontal slot, and means for limiting the downward movement of the operating member of the dog for closing the upper end of said inclined slot to support the leaf.

3. In combination with an extension table comprising a frame supporting top members having slides for longitudinal movement of said top members on the frame, a leaf housed below the inner ends of the top members and adapted to be raised and lowered with respect thereto, and crosspieces secured to theunder side of the leaf to engage the supporting frame for guiding the leaf in its vertical movements, a plate attached to one of the slides and having inclined and vertical slots cooperating with a support attached to the leaf for raising and lowering the same, a dog pivoted to the plate at one side of the upper endof the inclined slot and adaptedto normally extend acrossV the horizontal slot, and means for limiting the downward movement of the operating member of the dog for closing the upper end of said inclined slot to support the leaf.

4. In combination with an extension table comprising a frame supporting top members having slides for longitudinal movement of said top members on the frame, a leaf housed below the inner ends of the top members and adapted to be raised and lowered with respect thereto, and crosspieces secured to the under side of the leaf to engage the supporting frame for guiding the 'leaf in its Vertical movements, one of the slides having communicating inclined and horizontal slots, a dog pivoted tothe slide at one side of the upper end of the .inclined slot and adapted to Ythe leaf in its vertical movements, one of the normally extend acrossthe horizontal slot, and vmeans for limiting the downward movement of the operating member ofthe dog for closing the upper end of said inclined slot to support the leaf.

5. In combination with an extension table comprising a frame supporting top members having slides for longitudinal movement of said top members on the frame, a leaf housed below the inner ends of the top members and adapted to be raised and lowered with respect thereto, and crosspieces secured to the under side of the leaf to engage the supporting frame for guiding the leaf in its vertical movements, one of the slides having communicating inclined and horizontal slots, a dog pivoted to the slide at one side of the upper end lof the inclined slot and adapted to normally extend across the horizontal slot, and a pin for limiting the downward movement of the operating member of the dog for closing the upper end of said inclined slot to support the leaf.

6. In combination with an extension table comprising a frame supporting top members having slides for longitudinal movement of said top members on the frame, a leaf housed below the inner ends of the top members and adapted to be raised and lowered with respect thereto, and crosspieces secured to the under side of the leaf to engage the supporting frame for guiding slides having communicating inclined and horizontal slots, a dog pivoted to the slide at one side of the upper end of the inclined slot and adapted to normally extend across the horizontal n slot, a hook on the tail piece of the dog, and a ll pin on the slide for limiting the downward movement of the operating member of the dog for closing the upper end of said inclined slot to support the leaf.

7. A metal xture for extension tables comprising a slide having communicating inclined and horizontal slots, a dog pivoted to the slide and having a member adapted to extend across one of` said slots, a member on the ydog at the opposite side of the pivot from the aforesaid 12] member for moving the dog to'ncrmal position by gravity, `and means for limiting the movement of the dog in one direction.

8. A metal fixture for extension tables comprising a slide Vhaving communicating inclined and horizontal slots, a dog pivoted to the slide to extend across one of the slots and having a hook on the tail piece thereof,.and a pin on the slide with which said hook engagea 9. A metal fixture for extension tables com- 13a prising a slide having communicating inclined and horizontal slots, a dog pivoted to the slide to extend across one of the slots and having a hook on the tail piece thereof, a pin on the slide with which said hook engages, and means for 3.5 returning said dog to normal position.

WENDELIN P. SENG. GEORGE F. HASSEL.

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