US678834A - Extension-table. - Google Patents

Description

No. 678,834. Patented luly l6, I901. G. A. DAVIS.

EXTENSION TABLE.

(Application filed Jan. 28, 1901.)

.(No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE A. DAVIS, OF GRAND RAPIDS, MICHIGAN, ASSIGNGR TO STOlV & DAVIS FURNITURE COMPANY, OF SAME PLACE.

EXTENSION-TABLE.

SPECIFICATION forming part of Letters Patent NO. 678,834, dated July 16, 1901.

Application filed January 28,1901. Serial No. 45,117. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE A. DAVIS, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented new and useful Improvements in Extension-Tables, of which the following is a specification.

My invention relates to improvements in the construction of extension-tables; and its object is to suspend a separable supportingbase from the top in such a way as to maintain under the strain of use the original rigidity of construction. This object I accomplish by means of the mechanism illustrated in the accompanying drawings, in which Figure 1 is a vertical cross-section of a closed extension-table, through the central plane thereof. Fig. 2 is a vertical cross-section showing the same form of construction as in Fig. 1 and showing the table slightly opened and taken on the central plane at right angles to the plane in Fig. 1. Figs. 3 andet are detailed views of a portion of the same parts shown in Fig. 2, but showing the alternative forms of construction.

Similar letters refer to similar parts throughout the several views.

In the drawings I have shown that form of extension-table which when closed is supported by a single central pedestal or column, which pedestal or column is separable into two parts and divides as the table is opened. It is apparent, however, that my invention may be applied to tables having supportingbases of other well-known forms.

In the drawings, A represents the top of the table.

M M M M are the bridge-blocks, running lengthwise of the table and attached on their upper surface to the lower surface of the top and on their lower surface to the cross-bar F. There are two of these cross-bars, each of which in the form of construction shown is near the inner edge of its portion of the separable top.

E E represent the separable supportingcolumns. These colums are at the top rigidly attached to the cross-bar F by screws, bolts, brackets, or other customary means. The supporting-column is carried upon suitable feet, as shown.

To the extent already described my invention does not difier from that form in common use. It is evident that when the table is extended and weight is applied to the same the attachment between the top of the column and the cross bar is subjected to a great strain and considerable leverage is exerted, which has a tendency to pull the supportingcolumn away from the cross-bar, at the inner edge of the same. tachment between the column and the crossbar acts in a sense as a fulcrum-point and the length of the column and the foot as a lever tending to accomplish this result. In practice it has been found very difficult so to attach the column to the cross-bar as to prevent the weakening and springing of the structure at the inner edge of such attachment and the opening of the column toward the bottom.

I provide between the central bridge-bars and attach to them, and thus indirectly attach to the top itself, or, if desired, directly attach also to the top itself, a suspendingblock, (shown in the drawings by B.) If this suspending-block extends upwardly in close contact with the top, I cut away a portion thereof, as shown in Fig. 1, so as to give access to the nut which is there located. I then provide a suspending connection in the nature of a truss between the suspendingblock and the inner portion of the supporting-base. In the form of construction shown in Figs. 1 and 2 this connection is a rod (shown by D) having at its lower end a hook G or equivalent means of engaging the adjacent base. At its upper end it is provided with a screw-thread and with a nut C. It is apparent that by assembling the parts as shown in Figs. 1 and 2 and then by screwing down the nut upon the upper end of the rod the lower portion of the base and the suspending-block, and thereby the whole top, will be clamped together with very great rigidity, and this rod will act in a sense as a truss, resisting the above-described tendency to open at the inner portion of the joint between the column and the cross-bar and at the bottom of the base.

I regard the above as the better form of construction; but it is apparent that the same The outer limit of the at gree, isobtained in substantially the same manner in the alternative forms of construction shown by Fig. 3, in which upon the one side is shown a hanger-bolt having a screwthread and a nut upon its upper end and a screw-thread and point upon its lower end suspended from the suspending-block and engaging with the body of the inner portion of the supporting-column, and upon the other side is shown an ordinary carriage-bolt having its head in a recess cut out of the inner portion of the supporting-column and a nut.

upon the other end above the suspendingblock.

The point of suspension may be considerably varied without departing from my invention, the essential feature being that the separable base should be hung from the top at a point at or near the inner portion of the separable base, so as effectively to resist the tendency of the joint to spring open at this point. It is apparent also that the central portion of the base might be suspended from and clamped to the top and the cross-bar without the intervention of the suspendingblock which I have shown; but I regard the latter as the desired and preferable form of construction.

by Letters Patent, is

1. In an extension-table, the combination l of the separable top having bridge-blocks and cross-bar, the-separable base attached to the top structure, the suspending-block attached to the bridge-blocks, and means for suspending the central portions of the supporting-base from and clamping the same to said suspending-block, substantially as de fscribed'.

2. In an extension-table, the combination of the separable top having bridge-blocks and cross-bar, the separable base attached to said top structure, and a clamping-rod engaging at its lower end with the inner por- 1 tion of the supporting-base and at its upper end with the top structure and adapted to suspend the one from the other and clamp the same firmly together, substantially as described.

3. In an extensible table,the combination of the top, a. base therefor, and adjustable means connected with the top for suspendingand clamping the base thereto.

4. In an extensible table, the combination of the top, a base therefor, a rod connected with the top and engaging the base, and

means mounted onv said rod for clamping the 1 base to the top;

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 12th day of January, 1901; Having thus described my invention, what I claim to have invented, and desire to secure GEORGE A. DAVIS;

\Vitnesses:

ARTHUR C. DENISON, GEO. GLAPPERTON.

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