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Publication numberUS1915346 A
Publication typeGrant
Publication dateJun 27, 1933
Filing dateJul 7, 1930
Priority dateJul 7, 1930
Publication numberUS 1915346 A, US 1915346A, US-A-1915346, US1915346 A, US1915346A
InventorsMax Wurm
Original AssigneeMax Wurm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Extension table
US 1915346 A
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Description  (OCR text may contain errors)

June 27, 1933. M.`WURM 1,915,346

EXTENSION TABLE Filed July 7, 1930 EL3 4; L47@ 3@ ATTORNEY Patented June 27, 1933 ras ^ 'Unirse sra l,tll5,346

MAX WURM, or DETROIT, MICHIGAN EXTENSION TABLE Application filed July 7, 1930. Serial No. '4625,162.V

My inventionrelates in general to extension tables and more particularly to that type in which the main or permanent tabletop is movable in the horizontal plane to permit of an adjustable filler-leaf being raised trom below into saidl plane adjacent said table-top, in order to extend at will t-he superiicial area of the top and then to be removed from said temporary position and stored beneath the table-top. f

Some oi the important advantages possessed by my improvements are that the structure will tit any type of base or table; that they permit of the use with a divided tabletop of a whole filler-leaf or non-sectional filler formed in one-piece from end to end7 although the sectional type may also be used ;y that the filler-leaf is verticallyV adjustable, up and down, to raiseit into and lower it below the plane of the tabletop; thatv the filler-leal maybe turned on a vertical axis to bring it into and out of parallelism'lwith said tablewtop, so that the liller-leaf may be made in a singlenon-folding piece and moved as such into service position and then returned to stored position; that the liller-leaf has capacity ot' central parallel vertical guiding to bring it into service position with the table-top and remove it therefrom into storage position; that the'llersleaf is automatically raised from its lowered posit-ion into the plane of the table-top by the horizontal shifting movement of the latter in the direction tor open it, and is likewise automatically lowered intoposition below the plane oi the table-top by the reversehorizontalmovcment of the latter to close it; that upon completion of the horizontal shifting movement of the table-top in opening it, the

liller-leaf, which is thereby brought up-from below, is then given an initial turning move-V ment in the direction in which it is to be manually turned, the iller-leafb-eing lirmly balancedin 'its ascent and descent; that the equalizing slides of theA table-top have the operating racks and pinions concealed Within grooves inthe slides and are held by vertical pins, without the use of screws; that the filler-leaf when stored below the tabletop' is held against: wobbling by means of pressure exerted on the leaf` through means controlled by the table-top when itis moved into closed position; that the filler-leafis prevented from turning on its axis when stored; that the iiller-leaf is stopped when 545 Y turned tlnough a quarter circle into parallelism with the table-top; that the' automatic action of the filler-leaf is accomplished through the simple means of coacting bevels and inclined-members operatively arranged between said filler-leaf and the movable topmember. Other important advantages derived from the use of my invention will appear hereinafter from the detailed description made in connection with the illustrations herein.

I have illustrated types of my invention inthe accompanying drawing, wherein;

Figure l shows a top-plan view ofan ex tension table embodying my improvements, with thetable-.top members moved apart and a filler-leaf elevated into the plane .thereof and partly turned on the vertical axis oi'.ro tation of the filler-leaf, which position is j assumed when the filler-leaf is being manually turned intoparallelism with the tabletop, andl also when being turned back out of parallelism therewith when returning the leal into its stored position. i Figure 2 shows a central vertical sectional 80 View of the structure shown in Fig. l, with the filler-leaf lowered into stored position and the table-top members closed above it, the plane oi the section being indicated by the line 2-2, in Fig.` l. p 85' Figure 3 shows a similar view to Fig. 2, but

lwith the table top members slid 'apart and the filler-leaf disposed in the plane thereof and standing at right-angles thereto ready 'to be turned manually into parallelism therewith, or to be lowered into the stored position of Fig. 2. In this view a portion of one of the table-top slides broken away in orderto expose to view the concealedv rack. Figure Li slrowsa central vertical sectional view oft the structure of Fig. 3, but with the plane ot the section at right-angles thereto,

as' indicated by the line l-4-, in Fig. 3.

Figure 5 shows an enlarged detail view of one o1 the equalizmg slides in horizontal sec'- 100 tion on the plane indicated byline 5 5, inv Fig. 4.

Figure 6 shows a detail view of one of the inclined members carried by a slide and the bevel controlled by the filler-leaf and cooperating with said inclined member to effect the automatic raising and lowering ofthe fillerleaf. n

Figure 7 shows on a reduced scale, a top plan view of around top tablewith a modified form of filler-leaf, a portion of the table top being broken away to show the filler leaf beneath it. f

Figure 8 shows a central vertical sectional view of the structure of Fig. 7, the'plane of the section being indicated by the line -8, in Fig. 7. L Y

Referring to the drawing, in which like numerals of reference indicate like parts throughout 1, 1, are central legs disposed on a transverse plane of a rectangular shaped table having two top-members 3 and 4, which slide horizontally toward and away from each other in contracting and extending the top, by means of slides 5 and 6, attached to the member 3, rand the slides 7 and 8, attached to the member 4, the respectiveslides being arranged to slide on the sides of the two parallelguides 9 and 10, which are fixed to the f bridge or stretcher 11.

vThe guides 9, 10, are provided upon their respective sides with longitudinal dove-l tailed grooves 12, for receiving the correspondingly dovetailed tongues 13, of therespective slides, as shown particularly in Figs. 3 and 4. These slides are of the equalizing type, having upon their inner faces concealed racks 14, 15, each in mesh with the interposed pinion 16, turning on a vertical arbor 17, and arranged in a recess 18, in the guide. See Figs.` 1, 3, 4'andv 5. The racks are sunk in grooves 19, 4in the slides and are held in place byy pins 20, driven 'vertically through the slides vand lying between the rack-teeth, so

: that I avoid the use of numerous screws used generallyv in equalizing slides. The housing thus afforded the racks serves also to prevent them from rusting. By this means, the top members 3- and 4, move in unison and the same i distance each, when slidfin either direction.

The adjustable filler-leaf 21, is in one-piece.

andis rectangular in shape, with its long.y

dimension equal to the width of the tabletop members between which itis introducedV to extend the superficial area ofthe top. 'The leaf is provided with a central vertical axis of rotation and is constructed .and arranged to be turned to and fro in the horizontal over a range of substantially ,ninety degrees, so

f that it may be turned froma position of rightangles to that of parallelism to thetop-mennv bers 3 and 4.l The leaf is adjustable verti-4 cally on axis of rotation so that it may be p vraised into the plane of the table-top members and then lowered below said planete its storage level. By virtue of this arrangement, I am enabled to employ a non-folding filler-leaf in conjunction with a divided top table structure.

In the y present construction, the central turning means of the filler-leaf 21, comprises a cylindrical upright arbor 22, which is fixed to a base plate 23, secured by screws 24, to the under side of the bridge 11, through which the arbor passes and extends into a socket 25, upon t-he under side of the fillerleafin the center thereof. The socket 25, is arranged in the center of a cross-bar 26, which is secured by screws 27, to the under side of the filler-leaf, transversely thereof and with the ends of theba-r projecting slight ly beyond the side edges of the filler-leaf and extend to the inner sides ofthe respective slides 6 and 7,when the leaf is at right-angles to the topV members, clearance between one of said slides 6, and the aligning pins 28, which project from one edge of the leaf and engage the sockets 29, in the edge of the top member 3.k

, In addition to serving as a mounting for the pivotal socket 25, the cross-bar functions as the lifting and lowering means for the` filler-leaf and for this purpose it is provided at its respective ends with the bevels 30, 31, whose planes of inclination are disposed in opposite directions and cut the plane of the filler-leaf transversely thereof. The bevel 30, cooperates with the inclined member 32carried bythe slide 7, and the bevel 31, likewise cooperates with the inclined member 33, carrieflby the slide 6, so that the inclined members 32, 33, move in opposite directions when the table top members 3 and 4, are slid back and forth. The table top members 3 and 4, are provided with the'usual aprons 3a and 4, respectively, depending below the un der sides thereof, and the. entire guiding means for the movements of the filler-leaf 21, are disposed between the under side of the filler-leaf and substantially the plane containing the lower edges of .said aprons, so that the guiding mea-usare practically concealed.

When the filler-leaf is in its lowermost position and the table-top members 3 and 4, are closed above it, the inclined members 32, 33, are furthest apart, one at each end of the table, as indicated in Fig. 2. As the top members are moved apart, the inclined members 32, 33, travel toward the center of the table andas the top-members fully uncover and expose the filler-leaf, the inclined members gradually engage Athe under sides lof thebcvelsSO, 31, andslide under the same with a wedging action'whch gradually raises the lifting bar.- 26, and elevates the vller-leaf to the level of the top members 3 and 4, as indicated in Figs. 3', 4 and 6. While the bevels are still in engagement with the inclined members, the filler-,leafremains at right-angles to the' top members and at .substantially and thus serve to give the level thereof. rIhen the leaf is manually turned ina direction corresponding to the movement of the hands of a cloclr, as indi.- cated in Fig. l, and when turned a quarter of a circle into parallelism with the top memiers, the movement is there stepped by means of a projection 84, on the underside of the leaf colliding with the bracket 35, which is mounted upon the upper side of the bridge l1. Considering this turning of. the leaf in connection with Fig. 6, the lifting-bar 25, wonl d move to the right hand side of that ligure, awa-y from the inclined member' 32, which then remains at rest. lVhen the bevels reach the high point-s on the inclined members, as shown in Figs. 3, 4 and 6, that is the cxtreme l limit of movement of the slides, and when the slides stop with a sudden action sufficient impetus is imparted to the bevcls to cause them to jump away from the inclined members and thereby give to the filler-leaf its initial movement in the direction in which it is to be manually turned, for at this time the filler-leaf is raised clear of the slides and their guide, as shown in Figs. l, 3 and el. The intermediate position of the filler-leaf as it stands in the level of the plane of the table top members, is shown in Fig. l, which position is assumed when the leaf is being manually turned from its right-angular position, (see Fig. 3,) into parallelism with the top members when the latter are to be closed against the filler-leaf to extend the table top, and also when the leaf is being turned back from such parallelism into the right-angular position, prior to lowering the filler-leaf. lyhen the filler-leaf is turned back to its right-angular position and the top members are slid toward each lother to contactthe. table, the movement of the slides 6 and 7, carry the inclined members from beneath the hevels and thereby gradually lower the fillerleaf 'to its storage level, as indicated in Fig. 2.

The coaction of the bevels and inclined members gives parallel vertical. raising and lowering movement to the filler-leaf, likewise the central vertical pivot of the leaf, and such means further provides a lirm balanced action of the respective parts.

When the filler leaf is in its lowered position, the lifting-bar 26, takes in between the two vertical arms of U-shaped bracket 35, on the bridge l1, one arm being longer than the other. llhen the lifting-bar rises it is also guided by this bracket and when the leaf is raised to its level of turning, the long arm of thebracket still engages the lifting bar and thereby prevents the leaf from being turned in the wrong direction.

Upon the under side of the top members 3 and 4, are fixed inclined pieces and 37, respectively. These pieces engage the edge of the ends of the filler-leaf Q1, when the leaf is in, stored position and the top members are slid together, and this wedging action gives a pressing action on thc filler-leaf suflicient to prevent its wabbling.

The respective ends of the table are provided with legs 38', which are secured to brace pieces 39, secured between the guides 9 and l0, although they may be otherwise mounted.

In order to adapt my improvements to a round top or a square top table, it is only necessary, so far as the filler leaf is concerned, to provide the respective ends or the` respective side edges with folding` sections. In Figs. 7 and 8, I show this modification in a round top table wherein 3 and la, are the table top members slidable towards and away from each other and 2l, is the filler-leaf with hinged folding end sections 40, l The arbor 22, which is carried by the bridge member, enters a socket in the cross-bar 26a, the same as in the construction shown in the other figures. l The main part 21a, is of suliici-ent length to reach from the center of one lined guide to the other to afford support thereto when placed in position between the top members to extend the table. The folding ends are then swung over upon the guides and their slides.

By virtue of the simple construction of having the slide-racks arranged in grooves in the slides and retained therein by means of driven in members, `such as pins, which pass vertically across the front of the racks and take in between adjacent teeth thereof, I avoid the use of the usual nails or screws.

I wish to be understood as not limiting my invention to the specific construction of the 'various different parts thereof, as it is evident that modifications may be made in the same, without, however, departing from the spirit of my'invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

l. An extension table-having a horizontally movable table-top, a vertically adjust1 able filler-leaf movable into and also below the plane of said table-top, said filler-leaf being mounted to turn on a vertical axis, connections intermediate between said table-top and filler-leafserving-to actuate automatically the latter bythe" to or fro horizontal movement of saidk table-top and cause said filler-leaf to be raised or lowered.

2. An extension table having a horizont-ally movable table-top provided with slides moving therewith, a vertically adjustable filler-leaf movable into andalso below the plane of said table-top, inclined. members reciproeated by said slides and controlling the lifting and lowering of said Eller-leaf, said filler-leaf having connected bevels arranged on the central transverse line thereof cooperating with said inclined members in the automatic lifting and lowering of said filler-leaf.

3. An extension table having a horizontally movable table-'top provided with slides moving therewith, a .vertically adjustable fillerleaf movable inte and also below the plane ot said table-top, inclined members with their inclines extending in longitudinally opposite directions and reciprocated by said slides and controlling the lifting and lowering of said filler-leaf, said iiller-leat being provided on its transverse central line with bevels inclined in longitudinally opposite directions in corresponde-nce with said inclined members and cooperating therewith in the automatic lifting and lowering ot said filler-leaf.

4. An extension table having a horizontally lnovable table-top, a filler-leaf mounted to turn on a vertical axis and adjustable vertically for adjusting it below and in the pla-ne of said table-top, connections intermedia-te between said table-top and tiller leal causing the horizontal movements ot said table-top to automatically raise said liller-leat into position to be manually turned into parallelism with said table-top and back into rightanQular position therewith.

o. An extension table having a horizontally movable table top, a filler-leal: mounted to turn on aV vertical asis and adjustable verti- 'ally for adjusting it below and in the plane ot said table-top, connections intermediate between said table-top and filler-leaf causing the horizontal movements et' sad table-top to automatically raise said liller-leat intoA position to be manually turned into parallelism with said table top and impart to said iller-leat its initial turning movement in the direction ot the manual turning.

(i. An extension table comprising a horizontally movable table-top, a vertically adjustable filler-leaf having a subjacent transverse bar pivoted centrally of said liller-lea't so that it may be turned on a `vertical artis, said bar having bevels inclined in opposite directions, and correspondingly inclined members moving horizontally in response to the movement of said table-top and engaging said bcvels in such movements and serving to raise and lower said filler-leaf on its pivotal axis.

7. An extension table having ahorizontally movable table toi'npa' bridge, a liller-leaf mounted on said bridge so-as to turn on a vertical axis and adjustable. vertically ior raising it into the plane ot said table top and lowerin it beneath sai d plane, and means for preventing theturning of said filler-leaf beyond its position of parallelism with said table-top, said means comprising a projection on the under side of said filler-leaf and a Vthied piece on said bridge adapted to engage said projection when said filler-leaf shifted into parallel position with said table-top.

8. An extension table having a horizontally movable table-top, a bridge, a filler-leaf mounted on said bridge so as to turn ona vertical axis and adjustable vertically to raise pressed.

9. An extension table including horizontalf ly movable table top members provided with equalizing slides having racks embedded in the slides and pinions cooperating with said racks, said racks being secured in place by means of retaining-pins located between the rack-teeth and driven in the slides.

Yl0. An ertensiontableincludingahorizonn tally movable table top, a filler-leaf adjustable into and below the plane of said table top, and one or more wedging means mounted on said table-top with the wedging surface engaging said liller-leatl to prevent its Wabbling when in lowered position and the said table top is closed above it.

ll. An extension table having a horizoni tally movable table-top, a filler-leaf mounted to turn on a vertical axis and adjustable vertically 'For adjusting it below and in the plane ot said table-top, connections intermediate between said table-top and filler-leaf causing i the horizontal movements ot said table-top to automatically raise said filler-leaf into position to be turned into parallelism with said table-top and back into right-angular position therewith` the said connections comprising an inclined part on said filler-leaf and a subjacent inclined part connected with and moving! in response to the movements of said table-top, the said inclined parts being inclined in opposite directions and adapted to engage each other so that the outward movement of said table-top causes its connected inclined part toy travel under the filler-leaf inclined part and lift the same substantially into the plane of said table-topn and guiding means for preventing the filler-leaf from turning during the lifting movement thereof.

12. An extension table having a horizontally movable table-top. a filler-leaf mounted to turn on a vertical axis and adjustable vertically for moving it below and into the plane of said table-top, connections intermediate bctween ysaid table-top and filler-leaf 4causing the horizontal movements of said table-top to automatically raise said lillerleaf into position to be turned into parallelism with said table-top and back into rightangular position therewith, the said connections comprising an inclined part on said vEller-leaf and a subjacent inclined part connected with and moving in response to the movements of said table-top, the said inclined parts sloping in opposite directions and adapted to engage each other so that the outward movement ot said table-top causes its connected inclined part to travel under the inclined part of said filler-leaf and litt the same substantially into the plane ol' said table-top and the inward movement of said table-top causes its inclined part to travel from under that of said filler-leal'l and permit the lowering oi the same.

13. An Vextension table having top-members provided with slides and movable towards and away 'trom each other, a lillerleaf n'iounted to turn and to reciprocate vertically on a vertical axis and provided with bevels nca.'- opposite edges th ereo't, said bevels being inclined in opposite directions, inclines disposed upon the respect-ive inner slides oi said top-members and sloping in opposite directions so astio engage said bevels and cause the filler-leal to be raised when said top-members are moved apart and lowered when they are moved towards each other.

141-. ln an extension` table, oppositely arranged horizontally sliding top-members movable towards and away 'from each other and proif'ided with horizontal guides, and slides attached 'to each top-member and slidingly mounted upon said guides, one slide ot each top-member being disposed upon the inner side of the adjacent guide and the other slide ot each top-member being' disposed upon the outer side ot' the adjacent guide, that one slide ot a top-member liesto the inside ot its guide while the other lies to the outside of its guide.

l5. An extension table having` a bridge, a horizontallyY movable table top, a lill-r-lea'l mounted tomturn on a vertical axis and adjust-- ableverticallv for moving it below and into the plane of the table top., a projection on the underside ot sai-:l filler-leaf.` .and subjacent means carried by said bridge ttor receiving said projection and serving as a guide in the vertical movement ot said filler-leal.

16. Ain extension table having horizontally movable table top, a tl.ler-leat inount ed to turn on a vertical. axis and admstable vertically tor moving it below and into the plane oli said table top, a projection on the underside o'l said filler-leaf, subjacent means for receiving said projection and serving as a guide in the vertical movement of said filler-leal", said means comprising spaced members for receiving between them said projection and oneot said members being higher than the other to prevent the fillerleaf from being turned in one direction.

17. vAn extension table comprising a horizontally movable table top, a vertically adjustable filler-leall having a transverse bar lsecured thereto and mounted so that the leaf may be turned on a vertical axis, said bar having` bevels inclined in opposite directions, correspondingly inclined members moving horizontally in response to the movements of said table top and engaging said bevels in suoli movements-and serving to raise said filler-leaf on its pivotal axis, and snbjacent guiding means for receiving said bar and guiding the same vertically.

18. An extension table having` a horizontally movable table top, a vertically adjustable liller-leaf mounted to turn on a vertical aXis, means providing intermediate connections between said table-top and filler-leaf serving' to actuate automatically the fillerleat by the horizontal movement ol' said table-top and cause said tiller-leaf to be raised into the plane of said table-top.

19. An extension table provided'with a bridge, a horizontally movable table top provided with slides moving therewith, a vertically adj ustable filler-leaf movable into and also below the plane of said table top and having a vertical guide and a guide-way therefor mounted between said bridge and the underside of said liller-leaf centrally thereof, said filler-leaf beingprovided with bevels arranged on its transverse central line and inclined in longitudinally opposite directions, and inclined members having their inclines extending in longitudinally opposite directions in correspondence with said cooperating bevels and connected with and reciprocated by said slides and serving to automatically lift and lower said filler-leaf on its guiding means.

20. An extension table having a table top movable horizontally and provided with slides, a vertically adjustable liller-leat provided with centrally arranged vertical guiding means, connections intermediate between said filler-leaf and said slides for raising said leaf into the plane of the table top and lowering the leaf below said plane by the horizontal movement of the slides, the parts of said connections which are carried by the slides being constructed and arranged to travel beneath said filler-leaf in the movements of said slides and serving to balance said filler-leaf by contact therewithduring such movements.

2l. An extension table provided with a bridge, a horizontally movable table top provided with slides moving therewith, a vertically adjustable filler-leaf movable into and also below the lplane of the table top and having a vertical guidel and a guide-way ltherefor mounted between said bridge aud the underside of said Filler-leaf centrally, thereof, said lillerleaf being provided with inclines disposed on its central transverse line and sloping in longitudinally opposite directions, and inclined members with their inclines extending' in longitudinally opposite directions in correspondence with said inclines of the filler-leaf and connected with and reciprocated by said slides beneath said filler-leal when the latter is lowered, the Vupper ends of said inclined members acting to contact with and balance said filler-leaf during the rcciprocation of the slides.

22.`In an extension table, oppositely` arranged horizontally sliding top members movable towards and awayffrom each other and provided with slides7 a filler-leaf mounted to turn on a vertical axis and adjustable vertically into and also belowthe plane of said top members, and means arranged on said slides and disposed beneath said illerleaf Jfor balancing the same when in lowered POsition. A f' 23. In an extension table, oppositely arranged horizontally sliding top members movable towards and away from each other and provided with slides, a filler-leaf mount-l ed to turn on a vertical axis and adjustable vertically into and also below the plane of said top members, means arranged on said slides and disposed beneath said filler-leaf for balancingthe same when in lowered position and said means including a member fixed upon each slide and adapted to travel beneath said filler-leaf in the outward and inward movements of the slides and in Contact with said iller-leaf. 24. An extension table provided with a bridge, a horizontally movable top-member, an adjustable filler-leaf having means for vertical guiding for adjusting said fillerleaf below the level of sail top-member and also in the plane thereof, said guiding means comprising a guide arraiiged'upon tlieiinderside of said filler-leaf and a fixture including a base-plate mounted upontlie underside of lsaid bridge and provided with a vertical arborwbich passes upwardly through said bridge and. engages said guide on the fillerleaf.

25. An extension ytable having a main top section and a leaf section movable one toward and from theother in a horizontal plane, and one movable vertically toward and from the horizontal plane of the other, and means causing the first named motion in one direction to cause the movement intothe coni-.

mon plane, the Vleaf being mounted for move-` ment on a vertical axis to bring said means into and out of operable engagement..

26. An'extension table comprising a frame `with side-bars and having a leaf section and `a main top section movable one toward and from the other in a horizontal plane, and one movable vertically toward and from the horizontal plane f of the other, and means causing the first named motion in one direction to cause the movement into the common plane, the leaf having one `dimension vsuch that the leaf spans the side-bars and 'a transverse smaller dimension such that the leaf may lie betweentlie said side-bars, said leaf heilig mounted also for movement on a vertical axis to bring said leaf into and out of parallelism with said side-bars. i

27. An extension table having horizontally MAX WURM.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5180975 *Nov 14, 1990Jan 19, 1993Advantest CorporationPositioning device and IC conveyor utilizing the same
US7784414 *Mar 23, 2007Aug 31, 2010Raquel TorresShelving system
EP0187922A2 *Nov 22, 1985Jul 23, 1986Estelio BolzanProlongable table
WO1991005496A1 *Oct 16, 1990Apr 17, 1991Frontline Design InternationalExtension table
Classifications
U.S. Classification108/85, 108/139
International ClassificationA47B1/00, A47B1/03
Cooperative ClassificationA47B1/03
European ClassificationA47B1/03