US2676858A - Metal slide construction for extension tables - Google Patents

Description

April 27, 1954 w. A. DUNCAN METAL SLIDE CONSTRUCTION `FOR EXTENSION TABLES Filed Feb. 29, 1952 z'shee'ts-sheet 1 www, wm.

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ATTR/VEVJ Patented Apr. 27, 1954 METAL SLIDE CONSTRUCTION FR EXTENSION TABLES William A. Duncan, Statesville, N. C.,.assignor .to Acme -Homes Metal Works, Inc., a corporation of North Carolina Application .February Z9, 1952, SerialNo. 274,218

1 Claim. .-1

This invention relates to :table slide constructions and more particularly to an .improved .table slide of the type adapted for use in extension tables, and this application is fa continuation-inpart of my copending application Serial No. 184,695, led September 13, 1950.

Extension tables are commonly lconstructed with extension slide mechanisms .attached to the primary leaves of the table adjacent each side thereof so that the primary leaves may be moved apart to allow disposition yof an intermediate leaf between them for increasing the length of the table when desired. Often this auxiliary leaf is included` directly in the table construction as a solid .so-called jump leaf arranged to be i raised or lowered `into or out of active position, or it may be arranged Vas a folding leaf hinged midway of its length for folding into .the plane of the table top when needed, or it may be simply an auxiliary leaf that is stored ,separately from the table when not in use.

in my prior 'Patent No. 2,003,926, issued June 4, i935, there is disclosed a table slide `construction for extension tables which is adapted tobe formed of metal, although the function it performs is eX- actly the same as the woodenextension slides that are also used to a large extent in tables of .this sort. Ylvietal table slides, Such as are `disclosed in my above noted prior patent, offer substantial-advantages over wooden ones from :the standpoint of strength and lasting qualities, and the like, but they are difficult to construct for consistently smooth and -even operation without rendering their structural arrangement unduly complicated and therefore expensive. n

According to the present invention this diiiculty is obviated by the provision of a table slide construction formed simply of telescoped metal slide members but in which at lleast one of the slide members is formed with a positioning boss serving to maintain the slide members snugly intertted while spacing their adjacent telescoped faces to a substantial extentsoas 'to avoid Vbinding thereof, all as described vmore fully below in connection with the accompanying drawings, in which:

Fig. l is a longitudinal section view, partly fragmentary, of aV pedestal type extension table incorporating a slide -mechanism constructed ,in accordance with thepresent invention;

Eig. 2 is afragmentary sectional detailcorrespending to Fig. :l .but showing the disposition Vof the primary .table leaves rwhen1rretracted with the intermediateleaf removed;

Fig. 3 is a sectional detail ltaken substantially on the line 3--3 in -Fig. 1;

Fig. 4 is a fragmentary plan detail taken from the underside of the table on substantially the line t-t in Fig. l, and illustrating the manner in which the pedestal legs of the table shown in Fig. l are attached;

Fig. 5 is a sectional detail corresponding generally to Fig. 3, but showing a modified form of mounting `for the intermediate leaf;

Fig. 6 is a longitudinal section view, partly fragmentary, of a four-legged extension table incorporating a further modification of a slide mechanism constructed according to the present invention;

Fig. 7 is a fragmentary section detail correspending to Fig. 6 but showing the primary table leaves retracted with the intermediate leaf removed; and

Fig. y8 is a sectional detail taken substantially on the line 8--8 in Fig. 6.

Referring now in detail to the drawings, Fig. l illustrates the essential elements of a pedestal type extension `table incorporating a telescoping, metal, extension slide mechanism i, similar to that shown in my above noted prior patent, but constructed in `accordance with the present invention and incorporating means for mounting a jump leaf in combination with the slide mechanism lil, as willappear more at length presently.

The extension slide mechanism lil comprises an outer central telescoping member l2 from each end of Ywhich inner telescoping members ifi are adapted to be extended. The inner telescoping members i4 areattached to the primary table leaves l5 through brackets i8 by fastening screws or the like as at 2t, while the central member i2 of the slide mechanism l d is arranged `for attachment to the table pedestal by means of channel members Z2 fixed on the bottom face of member l2. These channel members 22 are arranged to open downwardly, .and are formed with reentrant flanges as at 2t (compare Figs. 3 and 4) defining ,a slot 126 inthe open face of the channel members 22 by which they are adapted for receiving and retaining the vhegen, 23 Of attaching bolts as at 3d for the .table pedestal. The

table pedestal may take'any convenient form,`

such/as a group of four leg members as at 32 assembled with lateralrbracesliiand formed at their upper ends lwith ilattened portions 36 having slots as .at 38 forreceiving attaching bolts. These flattened portions .36 Amay :be .secured directly -by the attaching bolts tt :carried in the .channel Vmembers :272, or auxiliary .channel members may be mounted transversely of the channel members 22 by the bolts 30 for carrying attaching bolts as at 42 to secure the pedestal legs 32 when greater adjustability is desired. In any event, it will be understood that the two pedestal legs 32 and the slide mechanism l0 shown in Fig. l are duplicated adjacent each side of the table.

The primary table leaves llt are shown moved apart in Fig. 1 with a jump leaf 443 interposed. This jump leaf 44 is mounted, as disclosed in the above noted copending application, in combination with the slide mechanism l0, on brackets 46 for manipulation between raised position, as shown in Fig. 1, and lowered position, as shown in Fig. 2. The brackets 46 are adapted for attachment to the side of the jump leaf 44 by fastening screws as at 48, and have a flat-face portion 50 that is disposed in a vertically dependent relation to the jump leaf fili when the brackets it are attached. This flat-face portion of the brackets 45 is further formed with a pair of spaced bayonet slots 52 which extend vertically for accommodating movementl of the jump leaf 44 between the raised and lowered positions, and these slots 52 have a reversely curved locking or bayonet portion 54 at their lower end for retaining the jump leaf 44 in raised position. The jump leaf mounting brackets 44 are assembled with the slide mechanisms lll on pin elements '5t spaced for disposition in the slots 52 to guide and support the brackets 4B and the jump leaf lli which they carry. It will be understood that the primary table leaves i6 are moved apart sufficiently to allow clearance for interposing the jump leaf lili, when it is raised from the lowered position shown in Fig. 2, before they are moved back into abutting relation as illustrated in Fig. l, the respective members of the slide mechanisms iii being fitted with stop elements as indicated at lit which are spaced properly to allow this movement of the primary table leaves i6.

The pin elements 56 by which the jump leaf mounting brackets l are assembled with the slide mechanisms I may be supported directly on the slide mechanisms il) as illustrated in 3, or they may be carried on separate brackets til as illustrated in Fig. 5. These separate brackets 60 are adapted particularly for use with slide mechanisms in which no provision has been made for supporting the pin elements 55 directly, or for use in instances where the construction of the slide mechanism being used does not readily permit direct attachment of the pin elements di, as in the case of wooden table slides, and may be formed with an extending slotted portion as at 62 for attachment as at 64 to a table pedestal if desired. In any case, the brackets Si) are further formed with a flat-face portion 66 disposed to extend upwardly in spaced relation with respect to the slide mechanism It for carrying the pin elements 56 with the same general disposition they would have if supported directly on the slide mechanisms l0.

Figs. 6, 7 and 8 illustrate a further modification of the jump leaf mounting means of the present invention for use in extension tables of the fourlegged type in which the table-legs are secured directly to the primary table leaves it as indicated at E8 in Fig. 6. With this type of table a different form of slide mechanism 'lli is used in which only two telescoping members are employed, an outer member 'l2 attached to one of the primary table leaves I6 by a bracket i8 and fastening screws 20, as in the previous instance described above, and an inner member lt similarly attached to the other primary table leaf it. This arrangement makes it necessary to provide for lateral as well as vertical movement of the jump leaf 44 in shifting it between raised and lowered positions. In Fig. 6, the jump leaf fifi is shown in raised position, and the lateral movement that must be available in manipulating it is illustrated by comparing Fig. 7 in which the jump leaf fili is shown in lowered position. To provide for this necessary lateral movement7 the pin eiements 56 are mounted for sliding movement in a horizontal slot 'It formed in a vertically extending flat-face portion T8 of a bracket te attached to the bottom face of the outer member l2 of slide mechanism lll. As in the case of the bracket lill employed in the embodiment illustrated in Fig. 5, the `flat-face portion 'i8 of the bracket Sii is disposed to extend vertically upward in spaced relation with respect to the slide mechanism "iii, so that the pin elements 56 are arranged for proper disposition in the bayonet slots 52 of the jump leaf mounting brackets lit. .es a result of this lateral movement allowed for -the pin elements y5&3, horizontal as well as vertical adjustment of the jump leaf fili is readily permitted.

The slide mechanisms it and employe the several modified arrangements descr above are all commonly arranged in that the ou slide members l2 and l2 are, in each instance, tubular in form with a longitudinal slot as at irl (Figs. 3 and 5) or S2 (Fig. 8) extending throughout their length in one side face, and the inner slide members it and 'ifi assembled in telescop f' relation therewith are of generally correspond` tubular form. As illustrated in the the tubular form of the outer slide mer and l2 is obtained by employing a reetangicross section in which a side wall portion 8d is joined with top and bottom wall portions BB or 86 and 8B or 88 that are each form their extending edges with lip portions or D gli or gli defining the previously mentioned loneltudinal slot `232 or 82 in the opposite side le Also, it should be noted particularly that th, wall portions 86 and 8d' are in each inst further formed according to the present i tion with a longitudinal boss 92 or 52 disposed. inwardly thereof.

The telescoped inner slide members la ard ld are likewise formed with a generally coi.,e spondingl rectangular cross section in which lop and bottom wall portions lili or ed and :l5 or et are iianged at 98 or 98 to form a longitu slot it@ or lll that is disposed adjacent die side wall portion 8d or 8d of the outer slide member l2 or l2 in assembling the me anisms l@ or it, and in which the opposite s wall of the inner slide members iii or il dered as at H32 or HB2 so that it is shaped to extend in assembled relation through the reir.- tively wide longitudinal slot S2 or di formed by the spaced lips or flanges @ii or lid' of the outer slide members l2 or 'i2 to a disposit n substantially flush with the outer side faces rf the flanges 9B or 9S.

The shouldered side wall form at EQ2 or employed in the inner slide members lll and it or 92 in the outer slide members I2 and.12 further. simplifies the structure of the slide mechanisms I0 and 10 constructed in accordance with the present invention through its inwardly disposed arrangement for contact with the adjacent or corresponding top portions 94 or 9U of the inner slide members I4 or 14. 'I'he result of this arrangement is that substantially linfe contact is established between the telescoped 'slide members of the slide mechanisms l0 and 10 for maintaining them snugly intertted while spacing the adjacent faces of the respective top wall portions 86 and 94 or 8 6' and 94 to avoid binding of the slide members during operation of the slide mechanisms l0 or 10. Also, the formation olf-fthe slide members with the longitudinal slots 1.02 or 82' and |00 or |09' allows a springing adjustment of these members to each other as they are assembled to form the slide mechanisms I0 and 'l0 so that a natural adjustment to the intertting function of the longitudinal baisses 92 or 92 is obtained that provides a smoothj'jand even action in the resulting assembly without any necessity for observing burdensometolerance limitations in the course of manufacture.

The present invention has been described in detail above for purposes of illustratioi only and is not intended to be limited by this description or otherwise except as dened in the appended claim. 'r

I claim:

A metal slide construction for f, extension tables comprising an outer slide member and at least one inner slide member assembled in telescoped relation for relative sliding movement, said outer slide member being generally rectangular in cross section with a side portion having top and bottom portions joined thereto and each of which are formed at their extending edges with lip portions forming the opposite side portion with a relatively Wide longitudinal slot throughout the length of said outer slide member, Isaid inner slide members being of generally corresponding form and being assembled with the resulting longitudinal slot therein disposed adjacent the rst mentioned side portion of said outer slide member, said outer slide member being further formed with a longitudinal boss disposed inwardly in the top portion thereof in line contact with the corresponding top portion of said inner slide members, and said inner slide members being further formed with a shouldered portion in the side portion thereof extending between the lip portions of said outer slide member to a disposition substantially ilush with the rectangular cross section of said outer slide member.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 949,119 Gruender Feb. 15, 1910 1,099,776 Stonesifer June 9, 1914 1,130,167 Ingells Mar. 2, 1915 1,531,810 Pelton Mar. 31, 1925 2,003,926 Duncan June 4, 1935 2,293,364 Schigut Aug. 18, 1942 2,536,366 Harris et al. Jan 2, 1951

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