US2092280A - Extension table - Google Patents

Description

Sept. 7, 1937. 1 5 KNECHTEL .2,092,280

EXTENS ION TABLE Filed March 16, 1936 2 Sheets-Shet 2 Inl/enfer. Jdco 5. Knec/y fel.

Patented Sept. 7, 1937 NETE. STATES PATVNT `OFFICE EXTENSION TABLE Jacob S. Knechtel, Hanover, Ontario, Canada Application March 16, 1936, Serial No. 69,122

The principal objects oi this 7 Claims.

invention are Vto A further and very important object is to provide a structure in which fthe separablesections may be securely locked in both the closed and extended positions in a vary simple manner.

The principal features ofthe invention consist in combining with a lever arm for raising and lowering an extension-leaf between theextension sections of a table, a positive means for locking the movable section lin both the closed and extended positions.

:In the accompanying-drawing s, Figure l is an underside plan View of my :improved table top showing the positions of the parts when the table is in its closed orsmallest form.

Figure 2 is an undersideplan view of the table top when in the extended positi Figure 3 is` an enlarged plan detail showing the means for locking the'tablesecti tions.

ons in both posi= Figure 4 is a cross sectional view through the line [aL-fi of Figure 2.

In the manufacturingof exten sion tables it has been proposed'to provide a centre leaf which will rest below the table top when the table is. in its closed orsmallest position and which when the table sections are drawnapart, may be lifted to a position level with the table top.

plished.

In the structure herein shown the top is vformed .oitwo movable sections I and 2 which are preferably forined with moulded hinged side rails The sections l and 2 are conne theusual 'form of slide bars, the ing secured to the section l, the ing secured to the section i2 and iloating between the other two.

cted'together by innerpair i beouter Ypairi bethe centrepair 5 A pinion 'I is journalled centrally on one of the centre slide bars and meshes with the racks 8 `mounted. on the adjacent `inner and , outer bars 4 and 5. This is the ordinary type of equalizer in extension tables, but it will be noted that only one of these is requiredron account of the drawing or tightening action `ofv th :hereinafter described. f

e locking device Abar 9 extends between the ends of the 4.inner pair of slide bars 4 which extend under thesection 2. Mountedcentrally on 4the upper side of. the -bar 9 and pivoting on a bolt I0 is a bar II preferably .formed of hardwood and .having `its end, extending toward the outward end of Ithe table top section I, offset at van obtuse angle. This offset portion I2 is preferably provided with a hand grip member I3 fastened to the under side.

The opposite end-of the bar II is formed with one side edge bevelled toward the end, and the bevelled portion is provided with anotch I4, the short edge I5 of which is preferably bevelled at the outward corner `as illustrated in Figure 3. This bevelled cornervis adapted toengage a pin I G secured in a block I? fastened on the underside of the table section 2. The pin is round and presents ..arounded surface to the bevelled face of the notch l5, so that a slight pressure exerted at the handleend of the .bar II will cause the beveled corner ofthe notch to first exert a draw- `inglaction on the pin todraw the meeting edges of the table sections with the leaf .snugly together and then securely lock said sections when the pin slips into the bottom of the notch. This arrangement of the pin and drawing notch eliminates the necessity of having eqnalizers on bothsets of slide bars.

A notch I8 is out on .the oppostie side of the bar I I to that in which the notch I is arranged, and it is spaced inwardly from the notch It a distance equalto half the width of the leaf, and is adapted to engage and interlock with a pin I9 secured in the block Il at a point near to the outer end of the table top section 2. The short edge I8 of this notch is also bevelled similar to that of the notch I4 and serves to draw the meeting edges of the table top sections together when the leaf is depressed.

It will be noted that the bar I I engages the pin I6 when the handle portion thereof is swung to the extreme position in one direction and the notch I8 engages the pin I9 when the handle member ofthe bar is swung the-full movement to vthe other side.

When the table is in the closed position, a table leaf 20 rests on top of the slide bars li, 5 and 6 in a recess formed between the risers `2I,.which are securely fastened to the underside of the top sections and support the slide bars 4 and 5. This leaf 2E! is held in a central position between the top` sections by a pin Z2 extending loosely into a hole 23 in the center slide bar 6.

Buffer strips 24 are arranged on the underside of the leaf to prevent it being raised beyond a level with the table sections, these buffer strips overlapping the underside of the adjacent edges of the separated sections.

The leaf has secured to its underside a pair of blocks and 26 formed with their inwardly extending ends bevelled, so that upon the swinging of the bar II on its pivot on one direction, it will engage these bevelled ends and lift the leaf. This operation is accomplished when the table top sections have been first drawn apart and the leaf is then raised into position between the adjacent ends of the sections.

When the leaf has been raised to a position between the two sections, the sections are moved into place by pushing against one end to engage the usual dowels for positioning the leaf and a slightly further movement brings the notched end of the bar II into transverse alignment with the pin I6 and by a slight swinging movement of the bar I I the bevelled edge of the notch I5 draws the pin tightly into position and locks the table sections securely from separation.

Side rail sections or aprons 2T are hinged on the ends of the leaf 20 to be swung outwardly into vertical positions when the leaf has been lifted to the raised position.

When it is desired to reduce the size of the table, the bar II is swung so as to release the lock pin I6 from engagement with the notch I5. The sections are then pulled slightly apart and the movement of the bar II is completed, allowing the leaf to drop. The end sections I and 2 are then pushed together over the lowered leaf until the edges come into contact, and when this position is achieved, the arm II is swung so as to bring it into contact with the pin I9 and the bevelled edge of the notch I8 engaging this pin, draws the sections tightly together and locks them securely.

It will be readily understood that this table may be easily manipulated by a person who is alone, as the hand block or grip I3 on the underside of the bar II enables the person while standing at the end of the table to swing the bar quite readily to rst unlock the sections by withdrawing the notched portion of the bar clear of the pin I9. The sections are then pulled apart, the equalizer holding them in their proper relation. A further movement of the bar II then engages the same with the bevelled blocks on the underside of the leaf, lifting the leaf upwardly until the buffer bars engage the underside of the top, then the table ends are pushed together and a further movement of the bar II brings the notch I4 into locking engagement with the pin I6 and the table is securely locked in an extended position.

It will be understood that the parts required in the manufacture of a-table such as described are of very simple formation. They may be constructed at a very moderate cost and when in position are strong and rugged and will resist all ordinary wear and tear.

What I claim as my invention iszl. In an extension table, the combination with a pair of table tops mounted upon an extension slide, and a leaf housed beneath the movable members of the table top, of a lever-pivotally mounted on one of said table tops and movable in one direction to raise said leaf and in the opposite direction to lower same, and means secured to the other of said table tops co-operative with said lever at the end of its movement in each of said directions to lock said pair of table tops selectively in extended or non-extended relation.

2. In an extension table, the combination with a pair of separable table tops mounted upon extension slides, a leaf member housed beneath the table top and movable vertically, and a lever pivotally mounted on one of said tops and adapted to raise and lower said leaf, of members rigidly secured to the underside of the table top which does not carry the lever, and means on one side of said lever adapted to engage one of said rigid members to lock the table in the closed position and on the other side of said lever to engage the other of said members to lock the table in its extended position.

3. In an extension table, the combination with a pair of table tops mounted upon extension slides and a leaf housed beneath the table top and adapted to be placed therebetween when said tops are moved apart, of a lever pivotally mounted on one of said table tops to swing under said tops and having .a notch on one side adjacent to one extremity and a notch on the other side farther from said extremity than the aforesaid notch, and locking members spaced apart on the underside of the other table top, said projections being adapted to be engaged by said notches upon the swinging of the lever to one side or to the other to tightly lock the table sections in their closed or their extended position.

4. In an extension table, the combination with a pair of table tops mounted upon extension slides and a leaf housed beneath the table top and adapted to be placed therebetween when said tops are moved apart, of a lever cooperatively associated with said leaf and pivotally mounted between the extension slides secured to one of the table tops, said lever having a notch on one side thereof arranged between said pivot and one extremity of the lever, said notch having a bevelled short edge, said lever also having a notch on the opposite side adjacent to said extremity, the shorter edge of which is bevelled, and a pair of pins carried by the underside of the other table top, said pins being spaced either side of the lever and adapted by the swinging of the lever to be brought into engagement selectively with the bevelled short edges of the lever to lock the table top in extended or closed relation respectively.

5. In an extension table the combination with a pair of table tops mounted upon extension slides and a leaf housed beneath the movable members of the table top, of a lever pivotally supported midway between the extension Slides of one of the table tops and adapted to raise and lower said leaf, said lever having an offset handle portion at one end and having at the other end a pair of notches, one arranged on either side, said notches being spaced apart longitudinally, and spaced pins mounted on the underside of the other of said table tops, said pins being adapted to enter said notches separately to lock the table tops securely from separation in their closed position and to lock them securely in their separated position.

6. In an extension table having a pair of extensible table sections each having a top mounted thereon adapted when extended to accommodate a leaf therebetween, means for locking said sections in extended and non-extended relation including a member mounted solely on one of said sections and displaceable in one direction into locking relation with the other section to lock the respective sections extended, and displaceable in a different direction into a second locking relation With said other section to lock the respective sections in non-extended relation.

7. In an extension table, the combination with a pair of slidably separable table sections having tops mounted thereon, a leaf housed beneath the movable members of the table top, and a lever pivotally connected with one of said table sections and displaceable bodily therewith relative to the other section on the separating and closing of the sliding sections, said lever having an operating extension underlying the top of the section to which it is connected and readily available for operation at the adjacent end of the table, said lever being movable in one direction to raise said leaf, of means co-operatively interposed between said lever and the other of said respective table sections co-operative at the end of the movement of the lever in each of said directions to lock said pair of table tops selectively in extended or non-extended relation.

JACOB S. KNECHTEL.

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