US980029A - Extension-table. - Google Patents

Description

E. TYDEN.

EXTENSION TABLE.

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Patented Dec. 27, 1910.

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APPLIOATION FILED 00T. 18, 1909.

Patented 1390.27.1910.

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'UNITED STATES NrAzrENir OFFICE.

.EMIL TYDEN, OF HASTINGS, MICHIGAN. v

EXTENSION-TABLE.

Specification of Letters Patent.

Patented Dee. 27, 1910.

Application filed October 18, 1909. Serial No. 523,330.

To all whom it may concern.'

Be it known that I, EMIL TYDEN, a citizen of the United States, residing at Hastings, in the county of Barry and State of Michigan, have invented new and useful Improvements in Extension-Tables, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved construction for an extension table, comprising means for locking the extensible members together at any stage of extension when fully closed up and means for accommodating for the expansion and contraction of the sections of the top or the llers interposed in extension, so t-hat on the one hand it shall be always possible to operate the locking device, notwithstanding the expansion of the sections or the fillers,

and so that on the other hand the parts shall be snugly drawn together notwithstanding shrinkage.

It consists of the features of construction shown and described as indicated in the claims.

Figure l is a longitudinal vertical section on the upper portion of an extension table equipped with this invention, showing the table extended both as to the supporting member and pedestal. Fig. 2 is a plan view of the same with the top part broken out to disclose the locking devices. Fig. 3 is a detail section in the same plane as Fig. 1, showing a different position of one of the top-locking devices.

The table illustrated in the drawings comprises the customary construction of table in which the pedestal is divided for extension and in which the top members are movable on the pedestal for extension whether or not the pedestal is extended.

1 and 2 are the pedestal members which may be provided with customary means for locking them together at close position, the

` `means shown in the drawing being merely a hook, 2, which can be reached from the top of the pedestal when the top members are partly extended. Each top member carries a hook for engaging the supporting member, and each'half of the supporting member, or pedestal, is provided with a separate plate, or engaging device, for coperating with the hook on the corresponding top member.

"The top member, 4, has the hook, 5, pivoted to it for swinging down into engagement with the engaging plate, 13, on the pedestal half corresponding to such top member. The hook, 5, is in position to be reached by the hand of the operator when the top members are spread, and is designed to be operated in this manner only. The hook, 6, upon the top member, 3, is pivoted to a slide, 7, which is mounted for sliding in a hanger, 8, secured to the top member', 3, and is operated by thc link, 9, connected to its outer end and extended to the outer end of the table, where it is connected to a lever, 10, fulcrumed on the underside of the top member, 3, the pivotal connection of the link and the lever being situated with respect to the lever fulcrum so that the lever swinging from a position at which it depends from its fulcrum up to a position above horizontal, where it is stopped against the underside of the table top, carries the pivotal connection of the link, 9, past the center, such move ment being effected against the resistance of a spring 12, coiled about the slide, 7, and stopped at one end on the slide and at the other end on the bearing of the slide, reacting for thrusting the slide inward and resisting the outward movement of the lever, 10, then locking the device when said lever, 10, is rocked for carrying the pivot of the link, 9, past the center, as stated.

The hook, 6, has a projection, 6, extending upward'near its fulcrum in position to collide with the inner bearing of the slide on the bracket, 8, when the spring, 12, operates to thrust the slide inward; and that action causes the hook to be lifted out of the engagement with engaging device on the supporting member, the. hook falling by gravity into the path for such engagement when the slide is retracted very slightly from the inward position to lwhich it is thrust by the spring 12. The engaging plates, 13 and 14, on the supporting member are of same construction so far as their means of engagement with the hooks, 5 and 6, are concerned. Each of said plates is made of sheet metal with a longitudinal rib, 15b, struck up along the middle of its width, leaving lateral flanges for fastening the plate to the supporting member, the struckup rib having notches, 16, 16, 16b for engagement of the hooks, the notches, 16, being at position for engagement with the hooks when the top members', 3 and 4, are close together, and the other notches being at half filler width intervals outward, so

that the engagement of the hooks may be effected at suitable points for admitting one or more fillers when each top member is extended equally from middle or closed pesition. The amount of longitudinal movement-which the slide, 7, receives from the lever 10, when it is rocked about its fulcrum from inner to outer position, is designed to be sufiicient to take up the slack which it is necessary to allow for the tenons or other engaging devices which connect the edges of the top members and slides, and to provide for tightening the parts together, either at closed position of the top members or when extended with intervening fillers.

When thel pedestal is extended for admission for a larger number of fillers than can be admitted by the extension of the top members relative to the pedestal, such extension of the pedestal must be limited at filler Width intervals in order that any top width fillers may be possible; and for thus limiting the extension of the pedestal at such filler-width steps, it is convenient to take advantage of the customary slides by which the pedestal and top members are connected for extension, which comprise, as is well understood, slides 20, 2O attached to one pedestal member, engaging and' moving alongside of slides 21, 21, attached to the other pedestal member. For that purpose the adjacent vertical surfaces of slides 2O and 21 are provided with notches 22, 22, in position for registering with each other, so as to receive the hook nose 24, of the hook 25, such hook nose extending across the meeting plane of the two slides to engage both registered notches, the hook being pivoted to either one of the slides which is recessed at the top to accommodate thehook as seen in Fig. 2, the sides of the recess 26, being cut away at 27, to admit the fingers of the operator to reach the hook.

The locked position of the body of the hook V6, is evidently invariable, and this would tend, if no preventative means were employed to render it sometimes impossible to lock the table on account of the swelling which the top members and fillers Awill experience from changes of temperature and moisture. On the other hand it sometimes would tend to make it impossible to lock the table tightly on account of the shrinkage of the top members and fillers by drying out. This difficulty is, of course, multiplied by the number of fillers which are inserted, presuming that they are. liable to swelling and shrinking, so that the total change to be accommodated is the sum of the change of all sections; and it is especially important to meet this difliculty in a table in which the range of extensibility comprises not only the range of movement on the top members on the pedestal, but also the range of extension of the pedestal halves.

To accommodate this variation due to swell-l ing and shrinking, any one or more of the elements concerned in drawing the parts of the table together may be made yielding. The entire train of connection, it will be observed, comprises both plates 13 and 14:, both hooks 5 and 6 and also the connections of the hook 6 with the lever 10. rPhe most convenient place for providing this yieldis in the hook 5, which is shown with a spring nose 5a, the hook being made of spring steel and other material suitably stiff and elastic folded in goose-neck form at the end to form the hook. The gooseneck 5a, provides the necessary elastic yielding. Either in addition to the yielding hook, or as an alternative, either one of the plates 13, or 14, may be mounted yieldingly. The plate 111, is so shown, its flanges 15, having slots 15, through which the screws which secure it to the pedestal member 2, are entered for so securing' it, a spring :28, being lodged in the channel formed by the struck-up rib and interposed between the downwardly folded end 14C, of the rib and a stop screw Q9, which is screwed into the top of the pedestal so as to extend up in the channel at proper position to thus stop the spring. Preferably this stop screw is of the form commonly known as a cornice hook, that is, having a right angle head which serves to engage and center the end of the spring. I claim 1. In an extension table, comprising a supporting member and top members, movable thereon for extension, in combination with such supporting member and top members, engaging devices on the supporting member and coperating engaging devices of the two vtop members respectively, relatively positioned for engagement at intervals of extension equal to the unit filler width, one of said engaging devices being mounted for movement. longitudinally of the table on the part by which it is carried for drawing the table members together, one` of said engaging devices comprising a spring, po-

sitioned therein for receiving the drawing pressure.

2. In an extension table comprising a supporting member-and top members movable relatively thereto for extension, the supporting member being divided and the parts being provided with slides by which they esobee ried for drawing the members together when such engaging devices are engaged, and one of such engaging devices comprising a spring positioned for yielding to the drawing pressure.

3. In an extension table which comprises a supporting member and top members movable relatively thereto for extension to admit fillers, in combination with such supporting member and top members, engaging devices on the supporting members cooperating and engaging devices on the top members, one of such engaging devices being movable longitudinally of the table on the member by which it is carried for drawing the two members together when such devices are engaged, and means for so moving the movable engaging device and for locking it, one of the engaging devices on the supporting member comprising a spring positioned for yielding to the drawing pressure.

4. In an extension table which comprises asupporting member and top members movable relatively thereto :t'oi extension to admit fillers, in combination with such supporting member and top member, hooks carried by the top members respectively, and plates carried by the supporting member having means for engaging the hooks positioned for such engagement at closed position of the top members and at half filler widthv intervals outward therefrom; a slide to which one of the hooks is pivoted, and means for operating the same longitudinally of the table for drawing the hook longitudinally; one of the plates being mounted on the supporting member for longitudinal movement, and a spring which resists such movement outwardly.

In testimony whereof I have hereunto set my hand at Chicago, Illinois, this 11th day of October, 1909.

EMIL TYDEN.

Vitnesses:

C. J. CHRIs'rorinL, M. G. ADY.

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