US1079927A - Extension-table. - Google Patents

Description

H. W. BRADNER.

EXTENSION TABLE.

APPLICATION FILED IEB.8, 1913.

Patented Nov. 25, 1913.

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5% lu/an/Zor H. W. BRADNER.

EXTENSION TABLE.

APPLICATION FILED FEB. 8', 1913.

1,079,927, I Patented Nov. 25, 1913.

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COLUMBIA PLANQGRAPH cm, WASHINGTON, I c.

uNiTEn STATES P TENT OFFICE.

HARRY w. BRADNELE, or TAcoMA, WASHINGTON, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, To THE GENERAL PATEN S COMPANY, me, on NEW YORK, N. Y.,

A. CORPORATION OIE YORK.

V EXTENSION-TABLE.

Specification of Letters Patent.

Patented Nov. 25, 1913.

Original application filed May 20, 1912, Serial No. 698,445. Divided and this application filed February 8',

t 1913. Serial No. 747,026. i

To all whom it may concern Be it known that I, HARRY W. BRaDNnR, a citizen of the United States, residing at Tacoma, in the county of Pierce and State.

of Washington have invented a certain new and useful Improvement in Extension- Tables, of which the following is a specification.

The invention relatesto extension tables in the class of household furniture and more particularly to that type supported at the center by a pedestal or legs, and the objects of the invention are to provide mechanism by which the halves of the table-top are so connected as to move oppositely to equal distances in the opening and closing movements, thus maintaining balance, and permitting the table to be opened or closed by one person alone at one end, the other end moving automatically, and to provide means for insuring the easy movement of the slides and lessening or entirely avoiding the liability of the moving parts tobind.

The invention consists in certain novel features and details of construction by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show an approved form of the invention.

Figure 1 is a plan view of the table in the opened condition. Fig. 2 is a plan view of the slides and connected parts on a larger scale, the table-top being indicated by dotted lines. Fig. 3 is a corresponding vertical section taken transversely of the slides on the dividing line of the table-top and partly in elevation. Fig. 4 is a central vertical section of a portion, taken at a right angle to the View in Fig. 3, and partly in elevation. The remaining figures are on a still larger scale and show the construction of the slides. Fig. 5 is a transverse vertical section through the slides. Fig. 6 is a corresponding horizontal section, partly in plan View, the plane of section being indicated by the line 6-6 in Fig. 5. Fig. 7 is an elevation of the working face of one of the slides.

Similar letters of reference indicate the same parts in all the figures.

A is the upper part of a pedestal having a cap-piece A carrying the operating mech- 1 H H into the material of the table. tracks and rollers permit the tabletop to be 'anism and supporting the two halves A A of the tabletop. Mounted upon and fixed to the cap-piece near each end is a fixed guide 0 forming the central member of a set of slides to be further described, and at the center, lying parallel with the slides, is

fixed a bar D. extending diametrically of the table and as nearly as may be to the outer marginof each half of the table-top when in the closed condition. It carries on its upper face at each end a horizontal pulley E partially encircled by a cord or belt F x which is in efiect continuous but is divided at two points for attachment to the ends of arms G G located between the center-bar- D and the sets of slides, each fixed to one pertion of the table-top and extending some i distance beyond the dividing line between the two halves thereof. By this arrangement of cords and pulleys a movement of one portion of the table top is communicated to the other, so that in opening or closing l the tabletop the movement of one half in either direction automatically causes a corresponding-movement of the other half to the same extent and in the opposite direction, thus insuring the desired balance and permitting the opening. and closing move: ments to be easily effected by one person pulling or thrusting on one of the halves alone. Inorder" to utilize effectually the support offered to each half by the overhanging ends of the strong central bar D, the vertical pins E E which serve as centers or pivots for the pulleys E E are each provided with a forked head or yoke E in which is mounted a small grooved roller H matching a cylindrical track H on the under face of each portion of the table-top, and which may be a cylindrical wire lying upon or partially embedded in such face and secured by driving its upturned ends The supported by the central bar D at points as distant as practicable from the center of the table, and allow the halves to be moved anti-frictionally relatively to such bar. The sets of slides are also constructed to move with a minimum of friction while maintaining reliable engagement each with its neighbor. Each set is the counterpart of the other limitthe outward movement of the strips and comprises the relatively fixed central member C above referred to, and a slidable member J or K on each of the side faces thereof, one attached to one portion of the tabletop and the other to the opposite portion, to move therewith.

The adjacent faces of the several slides J, C, K, are grooved near the upper and lower edges to produce channels as at y 0 7a and form the longitudinally extending central ribs J C C K between the channels. On each rib is a strip or fiat bar of metal B wider than the rib and extending partially over the adjacent channels, and having its edges rounded. These strips B B lie face to face in pairs and at one end each is forked as at B and the branches folded to form housings B receiving pins B serving as shafts for small rollers B mounted in the housings and grooved on the periphery to match closely and engage the rounded edges of the adjacent strip. The fork B of each strip is at the opposite end from its neighbor, and the overhanging portions of the housings and their rollers are received in the channels. The strips of each pair are'thus joined with liberty to move longitudinally relatively to each other with their attached slides, the rollers serving as the means of engagement and in reducing the friction. To

' and slides and the separation of the two halves .of the table-top, a pro ection or spur B is produced on the upper edge of ea h strip at the proper location, arranged to strike or be struck by the upper roller B of the adjacent strip and arrest the outward movement; the inward movement is arrested by the contact of the two halves of the table-top, as will be understood.

Thus constructed and arranged, the several parts of the table are reliably joined while the required movements are permitted with but little friction, and slight changes of the materials employed, due to hygrometric conditions, do not interfere with the working of the mechanism.

Modifications may be made in the forms and proportions of the parts without departing from the invention,

be used without the whole.

The cord F may be a chain or other flexible connection, and the track H may be conand parts may structed and attached in a different manner than that shown and described.

No claim is made in this application to the cord-and-pulley mechanism for separating and closing the table-top, such being made the subject-matter of an application filed May 20, 1912, Serial No. 698,447.

I claim:

1. In an extension table of the character set forth, two relatively movable slides, each having channels on the face presented to the adjacent slide, a rib between such channels, a strip of metal extending longitudinally of each rib and secured thereto, a fork at one end of each of said strips and oppositely located relatively to the adjacent strip, housings in the branches of said forks, and rollers mounted in said housings and engaged with the upper and lower edges of the adj acent strip.

2. In an extension table, two relatively movable slides, each having a strip of metal extending longitudinally and secured thereto, a fork at one end of each of said strips and oppositely located relatively to the adjacent strip, housings in the branches of said forks, rollers mounted in said housings and engaged with the upper and lower edges of the adjacent strip, and stops for limiting the outward movement of said slides, consisting of spurs on the edge of said strips, formed integrally with the latter in the paths of said rollers.

3. In an extension table two relatively movable slides each having a flat strip of metal extending longitudinally thereof and secured thereto, each strip being slitted at one end thereof to separate the strip into two branches, said branches diverging in the planes of their respective strips and the terminal of each of said branches being bent over to form a hook-shaped flange extending over the adjacent edge of the opposite strip into engagement with the rear surface of the latter.

In testimony that I claim the invention above set forth I afiix my signature, in presence of two witnesses.

HARRY W. BRADNER.

Witnesses:

CHARLES R. SEARLE, HELEN V. RICE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G.

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