US1907111A - Extension table - Google Patents

Description

May 2, 1933. R. A. HOLLAND ET AL 1,907,111

EXTENS ION TABLE Filed Oct.. 30, 1931 3 Sheets-Sheet l INVENTORS'.

ATTORNEY.

' May 2, 1933o R. A. HOLLAND ET A1. 1,907,111

EXTENS ION TABLE May 2, 1933. R. A. HOLLAND x-:r Al.

EXT ENS I ON TABLE 1951 ,3 Sheets-Sheet 5 Filed oct. 5o

INVENTORS.

ATTORNEY.

Patented May 2, 1933 UNITED STATES PATENT oFFircEf i ROBERT A. HOLLAND AND ALFRED H.;HOLLAND, or wrNsTON-SALEM,-NORTH CAROLINA EXTENSION TAELE Application le'd October 30, 1931. Serial No. 571,978.-

This invention relates to an extension table Structure, and more especially to an extension table having the extension structure thereof of all-metal construction, which prevents '51 changes in the dimensions of the parts due to a change in humidity, and insuring easy operation of the extension structure at all times.

Heretofore, it has been customary in many cases to construct extension tables of wood 16 and other materials which changes its form and dimensions according to weather conditions and results in the extension structure being diiiicult to operate. Y

On account of the peculiar structure of our i device and the all-metal structure thereof, wey have Vprovided an extension table which can be manufactured at comparatively low cost and which is positive in its operation at all times and under all types of weather cong' ditions. Y

Y Some of the objects of our invention having been stated, other Objects will appear as the description proceeds, when takenin connection with the accompanying drawings, in

26 which- Figure 1 is an elevation of our extension table, extended beyond normal extended position;

A Figure 2 is a plan view of the extension structure with the leaves omitted;

Figure 3 is a longitudinal sectional view taken along the line 3 3 in Figure 2;

Figure 4f is a cross-sectional view taken along the line 4.-4 in Figure 2;

Figure 5 is a cross-sectional View taken along the line 5.-5 in Figure 2, and being on an enlarged scale;

Figure 6 is a View similar to the central portion of Figure 3 but showing a slightly modified construction; Y

Figure 7 is a cross-sectional view taken along the line 7-7 in Figure 6; v

Figure 8 is an enlarged longitudinalsectional View of the left hand corner of the structure shown in Figure .3; with a modified structure being shown therein;

Figure 9yis an end view of, Figure 8, looking from along the line 94-9 in Figure 8;

Figure 10 is a view looking from along the d line 10-10 in Figure 2 Y and Y showing the' means for pivotally and foldably mounting the center leaf 'of the table. i s Y -V n Referring more particularly to the draw-v ings, 10 and 1l indicate posts for a table, and 5'5AVK of course, it is evident that usually two posts 10 are disposed at one end and two posts l1 at the other end. A lower support twelve may be provided. The upper end of the posts 10 and l1 may have a framework therearo'und d as is conventional in table structure butin combination with our structure as hereinafter set forth upper supporting meansarenot necessary because the structure as' hereinafter explained is secured to the upper end of posts 10 and 11 as a means of securing the upper ends of posts 10 and 11 together. I

Regardless as to whether or not the upper ends of posts 10 and 1l have a frame there Y around, we secure the strips 13 and 14 to the upper ends of the pairs o-f posts 10 and 11. A pair of U bars 'or channel barsf16 and 17 are secured to the members 14 and 15,; the U bar 16 being' secured by meansof bracketslS andv19 on opposite ends thereof and' U bar 'i5 17 being secured by means of brackets 20 and 2l.

As the structure of theunits located on each side of the table are identical a description of one of these U bars and its associated parts willbe given and like reference characters with a prime notation, will apply to the other U bar and associated parts.

Each of the U bars has mounted ony the inner surface of each outer sidewall portion rollers 22 and 23 and in the central portion thereof also has rollers 24 and 25, the lower rollers 23 and' 25 being secured onbolts of 26 which are secured in both of the'sidewall portions of the U bar. 90

Angle member 27 is loosely mounted between the above mentioned ro-llers and said angle member has a channel formed on the lower edge thereof by the inwardly and upwardly projecting portion 29 and in this channel the upper rollers 22 and 24 are disposed. The lower rollers 23 and 25 support the lower edge of the angle members. These angle members have the upwardly projecting portions formed by indentations 30, 31 and 32 to which is'secured the outer leaf, or top section, of the table 34. Y

In the sidewall portion of angle member` 27 is a plurality of perforations forming a rack 36 particularly adapted to engage a toothed wheel, or pinion, 37 mounted on a pin 38, which pin is mounted in an inverted U bracket 39 and also in another U bracket 40 secured to the closed end of U bracket 39, forming a suitable bearing for the pinion 37.

On the other end `of U bar 16 is similarly mounted an angle member 41 which is identical in all respects to angle member 27 and is similarly mounted in pairs of rollers 42 and 43 which comprise upper and lower rollers identical to those just described and on these rollers the angle member 41 is mounted in the same manner as described for angle memlber 27. Angle member 41 has a rack 44 there on similar to rack 36 and this rack is adapted to engage one side of pinion 37. Angle member 41 has upwardly projecting indentations 45, 46 and 47 to which is secured leaf, or top section, 48.

The U bars 16 and 17 are secured to each other to form a rigid unit by means of braces suchv as angle members 49 and 50 which are secured in any suitable manner such as riveting or welding to the members 16 and 17.

Pivotally mounted between the members 49 and 50 isa rod 51 which has two bell cranks 52 and 53 which have holes therein which are penetrated by woodv screws 54 and 55, which are embedded in leaf 56, which leaf is in two sections, the other section being indicated by 57, hinged as at 58, and supporting brackets 59 and 60 are secured to the members 49 and 50 for supporting the leaf in folded position. The leaf is adapted to be folded and given a one half revolution to cause it to fall below the plane of leaves 34 and 48 to permit the table to be folded, by pushing the top sections 34 and 48 together. l

The abovedescription for one of the U bars and its associated parts fully describes the other U bar and its associated parts and therefore like reference characters will apply to the other U bar with the exception that the other U bar is indicated by reference character 17 but the parts not elsewhere described are indicated by the same reference character with a prime notation associated therewith.

It is evident that when leaf 34 is secured to members 27 and 27 and leaf 48 is secured to members 41 and 41 that a pull on either of the leaves 34 or 48 will automatically cause the other leaf to move in the opposite direction from that imparted to the leaf enga-ged by the hand of the personoperating the same on account of the reverse motion due to the pinions 37 and 37 engaging the racks 36 and 44 and 36 and 44 to spread the members apart from each other or to cause them to move towards each other.

In Figures 6 and 7, 8 and 9 there is shown a modified form of construction in which the partsv are identical to the above described structure except that instead of roller 25 angle bracket125is substituted, and instead of the upper 'roller 22 angle bracket 122 is substituted, the other parts being identical to the structure already described.

It is to be observed that the modified form of construction will operate as easily as the form in Awhich pairs of rollers are provided as the angle members 27 and 27in the central portions of the U-bars will press upwardly against the rollers, while at theends of the U-bars the angle'members 27 and 27 will press downwardly onfthe rollers, and therefore, the amount of friction will not be materially increased.

In the drawings and specication there has been set forth a preferred embodiment of our invention, and although specificV terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope-ofthe invention being set forth in the appended claims:

We claim:

1. An extension table comprising two oppositely slidable outwardly movable .top sections, parallel oppositely` slidableanglel bars secured to the underside of each top section, a'pair of U-bars, means for slidably mounting a pair of said angle bars between the sidewalls of said U-bars, eachy angle bar havinga rack therein disposed on that portion of the angle bar which occupies a position between the sidewalls of the U-bar, a pinion mounted on the base portion of each U-bar for engagement with the rack in each side bar.

2. An extension table comprising two oppositively slidable outwardly movable top sections, parallel oppositely slidabe angle bars having their horizontal portions secured to the under side of each top section, a pair of U-bars, means for slidably mountingthe vertically disposed portion of a pair of said side bars in the sidewalls of said U-bars, each side j bar having a rack therein, apinion mounted on the U-bars and enclosed by the sidewalls of the U-bars for engagement with the rack in each angle bar, meansfor securing the two leg slidably mounted on the sidewalls o veach U-bar, a rack associated with each angle member, a pinion mounted on each U-bar between the angle members for engagement with the rack on each angle member to cause reverse movement between the angle members when one of the angle members has sliding movement imparted thereto, the other leg of the angle members being disposed along the lower surface of a portion of the table top and means for securing the table top to said other leg.

4. An extension table comprising a framework, a table frame, means for securing the framework to the table frame, said framework having two spaced parallel U-bars, a pair of oppositely moving right angle members having one leg thereof mounted on the inner sidewalls of the U-bars, each oppositely moving right angle member having a rack, a pinion mounted between the side walls of the U-bars and having opposed teeth of the pinion engaged by said racks and means for securing a top section of the table to the other leg of each pair of oppositely moving right angle members.

5. An extension table comprising a pair of upwardly opening U-shaped members secured in spaced relation to the top portion of the table, each of said members having two spaced parallel wall portions, a pinion mounted for rotation between the wall portions, oppositely movable right angle members having one leg thereof slidably mounted on said wall portions and each of said movable members having a rack thereon engaging opposed portions of said pinion and means for securing a. top section of the table to the other leg of each pair of said movable members.

6. In an extension table, two spaced parallel U-bars, oppositely extending right angle bars slidably mounted on each inner sidewall of each U-bar, a rack on each right angle bar, a pinion mounted on the base of the U-bar between the right angle bars and having oppo- Y site portions thereof engaging said racks and a top section secured to a pair of said oppositely extending bars.

7. An extension table having two spaced parallel channel bars, rollers mounted on the sidewalls of said channel bars, a pair of oppositely extending angle bars having a channel on their lower edges engaging the said roller and being slidable with relation to the channel bars, a pinion mounted on the said channel bars, each of said angle bars having a rack engaging said pinion and a top section secured to pairs of angle bars extending in the same direction.

8. An extension table comprising two spaced parallel U-bars, rollers on the sidewalls of said U-bars, angle bars having an up- Vturned lower edge forming a channel in which some of said rollers are disposed, each of the angle bars having racks thereon, a pinion ixedly mounted for rotation on each of said tures.

- ROBERT A.HOLLAND. ALFRED H. HOLLAND.

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