US1384925A - Expansible circular table - Google Patents

Description

'1. SEILER.

EXPANSIBLE CIRCULAR TABLE.

APPLICATION FILED MAR, 29, I920.

Eatented July 19, 1921.,

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J. SEILER.

EXPANSIBLE CIRCULAR TABLE.

APPLICATION FILED MAR. 29,1920.

Patented July 19, 1921,

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AITyS JOSEF SEILER, 01E LIEGNI'I'Z, GERMANY.

EXPANSIBLE CIRCULAR TABLE.

Sipecification of Letters Patent.

Patented July 19, Iltlfdl.

Application filed March 29, 1920. SeriaI No. 369,783,

T all whom 2 1 may concern:

Be it known that I, Josue SEILER, a citizen oi the Republic oi? Germany, residing at Liegnitz, Germany, have invented a new and useful Improvement in Expansible Circular Tables, for which I have filed applications in Germany, dated September .2, 1915, and in Great Britain, dated February 13, 1920, or which. the following is a specification.

This invention has reference to improvements in expansible circular tables, and it consists broadly in a round table provided with expansion pieces or plates adapted to it around its periphery and which normally lie under the table top in approximately the form of a folded ian within a rim which has a screw-thread or like ongagement with a member of the frame and can be lowered and raised by rotating it, the arrangement being such that when the rim has been lowered all the plates can be simultaneously swung outward to form the enlarging ring and when the rim is again rotated to raise it the said ring is raised into the plane of the table top. lVhen the rim is again screwed downward the expansion plates are tilted obliquely and return simultaneously into their "tan-like position, whereupon they are concealed by again screwing up the rim. The invention also comprises certain novel constructional. details hereinafter described and specifically pointed out in the appended claims.

An embodiment of the inventaion is illustrated in the accompanying drawings, in which Figure 1 is a vertical section through the middle of the closed table;

Fig. 2 is a plan view of the table with the stationary top removed to show the arrangcment of the expansion plates below same;

Fig. 3 shows in section a portion of the enlarged table top; 7

Fig. 4: is a plan view oi a portion of the expanded table without the central stationary part;

Figs. 5, 6, and 7 show the means for raising theenlarging plates in various posi tions; and

Figs. 8 and 9 show means for locking the enlarging pieces or plates.

Referring to the drawings, the stationary part of the table consists oi the table top a 5.5which is connected by its downward extension Q with a member (Z having four arms arranged in the form of a cross. lhe rim Z) is adapted to be screwed upward and clownward by means of four spiral grooves m iormed in its inner face, in which grooves the ends 0 of the fixed cross (Z engage. The enlarging plates 7" are hingedly connected at one of their radial edges to carriers r bymeans of hinges s, and these carriers can swing and SlIClB up and down on rods 0.

Ihe carriers '0 rest upon a rotatable flat ring 0 provided with pins 9 which extend through slots a in the carriers, and the said ring is mounted on rollers e, to enableit to be easily rotated, and is guided at its inner edge on rollers p mounted on the rods 0, the arrangement being such that the carriers 2 and the ring 0 move together when the ring is rotated. To prevent the ring being rotated too far, stops 2' against which the carriers o abut are provided on the ring 6; and to limit the upward movement of the tree radial sides of the enlarging plates r, small plates a adapted to engage under the table top a are mounted on the inner circu lar edges of the plates 9'. Under the plates a, lie the plate tilters Z, which are hingedly connected to the carriers 1/, so that they are movable upward, and are provided with an easily moved pendulum-like trip la, which slides over a stationary ring 7 that is rigidly connected to the cross (Z and over the ring e (see F 6) when the carriers are being swung inward and outward. lVhen the rim 6 with the carriers o swung out is screwed upward, the trip 70 leaves the ring 7" and hangs down free. in the downward movement the trip contacts with the ring and tilts the plate lifter Z upward. Thereby the plates 7 are tilted up, through the plates a, so that they automatically take up their tanlike position in being swung inward. During this inward swinging the trip 70 is again turned into itshorizontal position.

At the point where the carriers o when swung outward lie over the rim 6, hooks m are mounted which normally lie in their inoperativeposition (Fig. 9). hen the rim Y) is raised, projections g on these hooks contact with the table top a, and thereby the front end of the hooks is depressed and the rear end, which is also formed with a hook, is raised, the latter hook becoming engaged in a seat in the table top a and the former being engaged under a plate it mounted on the rim Z) and projecting outward a little beyond its periphery, the said rim and the table top a being thus coupled together.

The swinging of the plates 9 outward and inward is facilitated by the provision of a handgrip t which is mounted slidably in one of the carriers '0, while a folding handle 'w enables the rim Z) to be readily rotated.

The expanding orenlarging of the table is effected as follows :The handle w is turned outward and by means of it the rim is rotated to the left until it is arrested by the stops Then by pulling out one of the carriers v (by means of the grip t in the case of a large table) the enlarging plates 7 are swung outward. These plates at once take up a horizontal position, the plate tilters Z not being disturbed in the swinging outward, and form a closed, horizontal stationary ring. By now rotating the rim 6 to the right, with the help of the handle .20 the said ring is raised into the plane of the stationary table top a, and at the same timethe said rim and table top are drawn together and locked to each other by means of the hooks m. The enlarging ring andthe table top a now form a single flat surface, and the plates or being engaged 7 under the table top a, the plates 9 constituting the said ring can not become tilted.

In order to restore the BXPELDSlOIl members to their position under the table top a, the

rim 6 is again rotated to the left, thus disengaging the hooks m from the plates 72. and the table top. 011 further rotation of the rim to the left the plate lifters Z are tilted up when the vtrips 70 contact with the fixed ring f and the several plates 1 are thus, through the plates a, tilted so that t ey take up automatically their fan-like position in swinging inward. Finally, the rim 6 is ro tated to the right to raise it into contact'with the table top a and the handle w is folded inward.

lVhat I claim is:

1. In an expansible circular table, the combination'of a central support or pedestal, a stationary circular table top supported thereon, rigid arms extending from said support in the form of a cross, a rotatable rim having spiral grooves formed in its inner periphery in which grooves the ends of the said arms are slidably engaged, a plurality of enlarging plates which are normally re t ained within the rim under the stationary table top and are adapted to be moved outward' to form an annulus around the periphcry of the said stationary table top, a carrier -arm for each enlarging plate, a rotatable ring on which all the said carrier-arms bear and to which each of the said arms is coupled, and means for automatically tilting the said enlarging plates, when they are being moved inward, to cause them to take up antomatically under the stationary table top positions in which they overlap each other like the leaves of a folded fan.

2. In an expansible circular table, the combination with a central supporting frame, a stationary circular table top supported thereon, a rotatable rim having a spiral-grooveand-tongue connection with the said frame to adapt it to be raised and lowered thereon, and a plurality of enlarging plates which are normally retained within the rim under the stationary table top and are adapted to be moved outward to form an annulus around the periphery of the said table top, of a carrier-arm for each enlarging plate hingedly connected to the said plate at one of its radial edges and pivot-ally and slidably carried at its inner end on a vertical pin mount ed on the central supporting frame, a rotatable ring on which all the said carrier-arms bear, a pin-and-slot connection between the said ring and eachrcarrier-arm, and a trip device for automatically tilting each enlarging plate as it is being swung inward, sub stantially as set. forth.-

3. In an expansible circular table, the combination of a central support or pedestal, a stationary circular table top supported thereon, a rotatable rim having a spiral-grooveand-tongue connection, with the said central support to adapt it to he raised and lowered thereon, a plurality of enlarging plates which are normally retained within the rim under the stationary table top and are adapted to form an annulus around the periphery of the said table top, arms pivotally carried on the central support and hingedly connected to the said enlarging plates, a rotatable ring on which all the said arms bear and to which each arm is coupled by apin-and-slot connection, hook devices mounted onthe said arms and adapted to be operated by the rim contacting therewith when it is rotated to raise it after the said arms have been swung outward, and trip devices for automatically tilting the enlarging plates as they are being swung inward, all substantially as set forth.

JOSE]? SEILEh- V Witnesses:

Ron. Z. FRIOKEX, MAN Harrison.

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